Jobs in United Kingdom

Senior Lead Junior Software Engineer Ii React Typescript Java in London

72 active opportunities · Updated October 2026

Explore current senior lead junior software engineer ii react typescript java jobs in London. Filter by work mode, employment type, experience, department, date posted and distance.

Hiring demand

56/100

steady · 42 related jobs

Hiring trend

-76.5%

Job postings compared with the previous 30 days

Remote options

7.1%

Share of matching jobs listed as remote

V
📍 London, UK, United Kingdom· Full-time
✓ Quality checkedCompany trend -88.2%

At Vanta, our mission is to help businesses earn and prove trust. We believe that security should be monitored and verified continuously, and we empower companies to practice better security and prove it with ease. Vanta has a kind and talented team, and while some have prior security experience, many have been successful at Vanta without it. Vanta is looking for a Sr Account Executive for our Upmarket team to take full ownership of the sales cycle in the UK market — bringing in new upmarket logos and helping shape the commercial sales playbook as we scale our EMEA presence. Vanta is growing quickly, we're profitable, and we're consistently outpacing our growth targets while maintaining exceptionally strong NPS scores. Our Sales team is leading the charge in growing market share as the category leader in compliance automation and trust management — and our EMEA commercial motion is a major part of that story. As a Sr AE in the UK, you'll be one of the key contributors to establishing Vanta's footprint in this market, converting both outbound and inbound pipeline into long-term customers and helping define how we sell to upmarket companies across the region. What you’ll do as an Account Executive at Vanta: Identify high-potential business verticals and execute outbound strategies to engage upmarket prospects across the UK Own the full sales cycle — from initial outreach through discovery, demo, negotiation, and close Convert inbound demand into closed-won business and long-term Vanta customers Manage and grow your pipeline, contributing to the maturation of Vanta's commercial sales process and playbook Tailor demos and sales materials to communicate the specific value of Vanta for each upmarket buyer Forecast accurately on a monthly and quarterly basis, maintaining strong pipeline hygiene in Salesforce Collaborate cross-functionally with SDRs, Solutions Engineering, GRC specialists, Legal, and Deal Desk throughout the sales process Surface prospect insights to inform

RestAIGoRust
C
📍 London, London, United Kingdom· Full-time
✓ Quality checkedCompany trend -100%

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! We’re looking for a senior engineer to help build, maintain and evolve the training framework that powers our frontier-scale language models. This role sits at the intersection of large-scale training, distributed systems, and HPC infrastructure. You will design and maintain the core components that enable fast, reliable, and scalable model training — and build the tooling that connects research ideas to thousands of GPUs. If you enjoy working across the full stack of ML systems, this role gives you the opportunity and autonomy to have massive impact. What You’ll Work On Build and own the training framework responsible for large-scale LLM training. Design distributed training abstractions (data/tensor/pipeline parallelism, FSDP/ZeRO strategies, memory management, checkpointing). Improve training throughput and stability on multi-node clusters (e.g., GB200/300, AMD, H200/100). Develop and maintain tooling for monitoring, logging, debugging, and developer ergonomics. Collaborate closely with infra teams to ensure our cluster, container environments, and hardware configurations support high-performance training. Investigate and res

DockerKubernetesGitAI
C
📍 London, London, United Kingdom· Full-time
✓ Quality checkedCompany trend -100%

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! Why this role? As a Member of Technical Staff in the Safety for Agents team, you will make a meaningful impact on the development of better, fairer, more trustworthy, and more secure Large Language Models (LLMs). Your primary focus will be on data generation, post-training algorithms, and evaluation methods to ensure Safety in the next generation of models that can access external resources and take actions in the world. You will work closely with other cross-functional machine learning teams and data annotation teams, and will also collaborate with product and policy teams. This role combines expertise in machine learning, ethical and responsible AI, experimental design, and data generation and management. It will require curiosity to tackle totally new scientific problems, engineering skills to implement the pieces we need to test solutions to these, and a desire to dive into messy data and results. You will be on a small team with a lot of autonomy and decision-making power, responsible for making the next generation of LLMs better for society as a whole. Please Note: The existing team work in offices in London, Edinburgh, Pa

PythonGitRestMachine Learning
C
📍 London, London, United Kingdom· Full-time
✓ Quality checkedDemand 56/100Company trend -100%

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! About the Role We're seeking a Senior/Staff Engineer to build and maintain the automation infrastructure that powers the development cycles of our North platform. This engineer will design and implement robust automation systems that enable engineers to efficiently test and validate changes across diverse environments and configurations. This role sits at the intersection of infrastructure and standards. You'll build the systems, frameworks, and culture that allow the rest of engineering to own quality themselves; improving and extending our testing platform by creating the infrastructure that allows engineers to write and execute tests, and enable every engineering team to ship with more confidence. Key Responsibilities Design and implement automation pipelines that support comprehensive testing across multiple environments with varying feature flags and realistic customer data profiles Create intelligent testing agents that simulate real user behavior to validate different configuration combinations Develop and maintain GitHub workflows and actions to automate testing, deployment, and validation processes Manage and optimize H

TypeScriptPythonAWSAzure
E(
📍 London, Greater London, United Kingdom· Full-time
✓ Quality checkedCompany trend -100%

About Ema Ema is building the world’s leading Agentic AI platform to transform enterprise productivity. We enable organizations to delegate repetitive tasks to Ema, the Universal AI Employee, delivering 10x gains in workforce efficiency, across functions. Founded by former executives from Google, Coinbase, Flipkart, and Okta, our team includes engineers from premier tech companies and graduates of Stanford, MIT, UC Berkeley, CMU, and IITs. We are backed by industry leading investors including Accel, Naspers/Prosus, Section32, and angels like Sheryl Sandberg and Dustin Moskovitz. Headquartered in Silicon Valley and with offices in London, Bangalore and Vancouver, Ema is at the frontier of what Agentic AI can do in production — we ship real systems that run real business processes at scale. Role: Senior Technical Support Specialist (Enterprise Agentic AI) Company: Ema Unlimited Inc. Location: London Employment Type: Full-time/Remote 1. About Ema (Why Ema) Ema is building the world’s first Universal AI Employee — a production-grade agentic AI platform that automates real enterprise workflows across HR, IT, Finance, and Operations. Ema’s customers do not run demos. They replace mission-critical, manual business processes with agentic AI systems that operate across multiple SaaS tools, APIs, and human-in-the-loop workflows. In this world, support is not reactive . Support is production reliability, trust preservation, and system learning . At Ema, Senior Technical Support Specialists are operators of live AI systems , not ticket handlers. 2. Role Overview The Senior Support Engineer owns the health, reliability, and trustworthiness of Ema’s deployed agentic AI systems in production. This role sits at the intersection of: AI behavior Workflow orchestration Enterprise integrations Customer trust Engineering feedback loops This is: ❌ Not L1 / call-center support, ❌ Not a “just escalate to engineering” role, ❌ Not reactive firefighting only This is : A senior technical escal

ReactAWSAzureGCP
S
📍 London, Greater London, United Kingdom· Full-time
✓ Quality checkedCompany trend -100%

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations. Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow. Synthesia is moving from a single product to a multi-product platform, and research is about to become one of the pillars that determines whether we get that transition right. You'd be joining as our first full-time UX researcher, working directly with product, design, and engineering on the bets that will define what Synthesia looks like over the next few years, including a new real-time, agentic product where we're figuring out an entirely new modality as we build it. This is a Senior IC role. You'll own research end-to-end and shape how the function itself takes form. Why now We've validated the appetite for research. Persona and jobs mapping shaped the first version of our newest product, and there's a strong pull from PMs, designers, and leadership for more. What we don't have yet is a full-time researcher who can operate across the whole product portfolio. The next six months contain some of the highest-stakes decisions we'll make: how the assistant experience should evolve, what drives adoption of the new product, and how we activate users in their earliest moments. Research should be shaping the direction on all three. What you'll be doing Running a combination of strategic and tactical qualitative resea

S
📍 London, Greater London, United Kingdom· Full-time
✓ Quality checkedCompany trend -100%

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations. Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow. Role overview Synthesia is used by over 90% of the Fortune 100, and the largest deployments now run thousands of creators across dozens of markets, languages, and compliance regimes. What decides whether those accounts expand or stall is not another avatar, it is whether admins, legal, and programme owners can actually stay in control. You'll own that layer end to end: workspace setup and governance, the content lifecycle, and the analytics and integrations that close the loop. This is the work that turns a proof of concept into a seven-figure renewal, and right now it is wide open. Why this role now AI video has crossed from experiment to standard tooling inside the world's biggest companies. The next phase of growth is won or lost on whether we can make that scale safe and manageable. That is your remit. What you'll be doing Owning the end-to-end roadmap for content lifecycle, governance, and the operational layer that keeps enterprise deployments running - from workspace setup through compliance controls Getting close to enterprise customers: understanding how IT admins, legal teams, programme managers and content owners think about governance, and what "in control" actually looks like at scale Translating th

DC
📍 London, England, United Kingdom
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

About The Role The Director, Strategic Alliances, EMEA will be responsible for defining and executing Diligent's partnerships strategy across the EMEA region as a senior individual contributor. This role will focus on identifying, structuring, and closing high-impact strategic partner-led deals that accelerate customer acquisition, expand Diligent's enterprise footprint, and drive revenue growth through partner resell and co-sell motions — with a particular focus on advisory and consulting firms (Big 4 and Tier 2) and large resellers/channel partners. This senior leader will develop deep insight into regional market dynamics and build the foundational partner ecosystem across advisory/consulting firms, resellers, and channel partners at the pace needed to match Diligent's rapid growth. This is fundamentally a builder's role — the person in this seat will need to build and own the region and its relationships largely from the ground up. This role requires close collaboration with Sales, Product, Marketing, and Customer Success teams. Success will be measured by partner-sourced and partner-influenced revenue, new logo acquisition, expansion of product usage through partners, and the establishment of scalable partnership models that can be operationalized as the business grows. Responsibilities Partnership Strategy & Execution Execute the EMEA partner strategy in alignment with Diligent's global objectives and regional go-to-market plans. Identify, prioritize, and secure strategic partnerships across advisory/consulting firms (Big 4 and Tier 2) Develop partner value propositions, commercial frameworks, and engagement models tailored to EMEA market needs. Establish repeatable partnership structures, playbooks, and success metrics that can scale over time as the region and partner base grow. Channel & Revenue Impact Drive partner-sourced and partner-influenced p

AIRecruitment
DC
📍 London, England, United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Position Overview As we accelerate Diligent's presence across EMEA's specialist services markets, we're looking for a driven, commercially sharp sales professional who can win and grow with senior buyers in a governed, compliance-driven world. This is a rare opportunity to join Specialty Markets, a high-growth EMEA division serving the firms that manage governance, entities, risk and audit on behalf of their clients. You'll own a defined, high-value territory with a clear mandate: grow net-new revenue and expand within an established base of Diligent relationships. If you know how to sell complex, multi-stakeholder software into professional and regulated services firms – and can get credible with their leaders fast – this role was built for you. The Market You'll Sell Into You'll sell to professional and regulated services firms that deliver governance, entity, risk, compliance and audit work on behalf of their clients. In practice that spans fund administrators, corporate service providers, management companies (ManCos / AIFMs), law firms, private equity and venture capital firms, trust & fiduciary services, risk advisers, and audit & advisory firms. This isn't back-office compliance – it's a revenue-generating service line they deliver to their own clients. Diligent's platform underpins how they run and scale that work, which makes us central to how they win, serve and grow their client base, not just how they stay compliant. Jurisdictions: this is a single, flexible mandate that can be run across any of our key offshore and onshore markets – including the Channel Islands, Luxembourg, Ireland, the UK, Cayman, BVI, Bermuda, the Isle of Man and the Middle East. Key Responsibilities Own the full commercial cycle across your patch – from prospecting and pipeline generation through to close and upsell – working both new-logo acquisition and account expansion. Use your network and market flue

AWSGitAIGo
DC
📍 London, England, United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Position Overview: The research function within Diligent Market Intelligence is primarily responsible for being subject matter experts on one of the research verticals. These verticals include compensation, governance, activism, voting and risk. Key responsibilities include managing the methodology for data collection; managing outsourcer workflow; quality assurance and liaising closely with Product and Engineering teams. The Senior Research Analyst serves as a subject-matter expert within a designated research vertical such as governance, compensation, activism, voting, or broader risk domains. This role conducts oversees third-party research workflows and owns the design and continuous refinement of data collection standards, quality controls, and methodology documentation. Findings are translated into clear, actionable insights for clients, while close collaboration with Research Managers, Product, Engineering, and Data Services ensures accurate outputs, regulatory alignment, process improvements, and strong operational reporting. As a senior team member, the analyst mentors colleagues, reviews deliverables for accuracy and consistency, and brings strong analytical judgment, curiosity, and leadership to advancing both the product and the overall research function. Key Responsibilities Develop, own, and continuously refine the data collection methodology for the assigned vertical, ensuring accuracy, consistency, and alignment with regulatory and product requirements. Proactively manage and communicate workload expectations to third-party research providers, ensuring timely, high-quality data delivery. Monitor and produce management reporting on daily workflows, identifying trends, bottlenecks, and opportunities for process optimization. Train and support third-party providers on methodology, quality standards, and process updates to ensure consistent execution across all research activities. Collaborate with Res

SQLAWSGitAI
P
📍 London, England, United Kingdom
✓ Quality checked

ABOUT THE ROLE We are seeking a highly organized, proactive, and detail-oriented Coordinator, International Events to join our team. In this role, you will support the planning, coordination, and physical execution of our international live events roadmap across active markets. Sitting at the intersection of event operations, member engagement, and brand execution, you will partner closely with the Senior Manager to bring high-impact global activations to life. Reporting directly to the Senior Manager, International Events, you will own essential operational workflows from building event web pages and managing ticketing platforms to tracking expenses, handling vendor logistics, and supporting on-site execution. If you thrive in a fast-paced environment, love bringing brand experiences to life, and take proactive ownership of your work, this role is for you. YOUR DAILY IMPACT AT PELOTON Assist across all phases of event planning and execution, including venue sourcing, vendor coordination, resource management, AV technicians and other suppliers Build and manage event web pages, workflows, and guest management systems (RSVP/ticketing platforms) across multiple teams Serve as the primary point of contact for member inquiries, managing event-related communication channels (pre and post event) and delivering top-tier customer service to our community Develop, update, and maintain detailed event timelines and detailed run-of-show schedules and operational documentation to ensure cross-functional alignment and on-time delivery Oversee event registration workflows and attendee record-keeping, ensuring clear communication and smooth access for VIPs, media, and general guest and members Provide hands-on, on-site support during activations - managing setup, assisting staff, overseeing guest check-in, troubleshooting live issues, and ensuring a seamless experience for members and attendees Assist in tracking line-item expenses, processing vendor invoices, and providing regular

AIProject ManagementLogisticsRecruitment
V
📍 London, UK, United Kingdom· Full-time
✓ Quality checkedCompany trend -88.2%

At Vanta, our mission is to help businesses earn and prove trust. We believe that security should be monitored and verified continuously, and we empower companies to practice better security and prove it with ease. Vanta has a kind and talented team, and while some have prior security experience, many have been successful at Vanta without it. As a Strategic Channel Manager focusing on our VARs partnerships for the EMEA region, you’ll manage a book of Vanta’s strategic channel partnerships, focused on building and scaling our business with major resellers in the security and compliance ecosystem. This role sits within Vanta’s Partnerships team, where you will have a direct role in bringing Vanta’s vision of securing every technology company. You will help us ensure that our partners always receive quality guidance and enablement as they go-to-market with Vanta. What you’ll do as a Senior Strategic Channel Manager at Vanta: Develop strong executive relationships across key VAR partners, acting as a strategic thought partner. Build direct relationships with individual VAR sellers to drive rep-level engagement, education, and deal collaboration. Execute Vanta’s go-to-market and enablement playbooks with strategic resellers to ensure consistent pipeline generation and resale execution. Launch and execute joint account mapping strategies to identify overlaps and drive prioritized co-selling motions with Vanta AEs and SDRs. Facilitate co-selling between your partners and our AE team to drive net-new ARR. Enable and train key team members on how working with Vanta will benefit them as a partner Proactively share partner insights, GTM feedback, and competitive intel to help evolve Vanta’s channel strategy. Manage your book effectively, providing regular updates on pipeline generation progress and pacing. How to be successful in this role: 6+ years of experience in channel sales, strategic partnerships, or business development Proven success working for or with large value-ad

RestAIGoRust
W
📍 London, England, United Kingdom· Full-time· Remote
✓ High-confidence listingCompany trend +37.5%
Quick readStrong listing-quality and freshness signals

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role At WRITER, our enterprise customers are building mission-critical AI applications that transform how their businesses operate. As a senior support engineer, your top priority is helping our developer personas and technical users succeed with our platform. You'll act as a leading voice for our enterprise support function, handling intricate customer issues directly while working in a complex and ambiguous environment to drive impactful value across our customers' businesses. You'll collaborate closely with Customer Success, Education, Product, Engineering, and Sales to create great experiences and help customers get the most out of the platform. By leveraging an automation-first mindset, you'll scale our support operations and use our own AI tools to solve problems faster and more efficiently. This role is available for hybrid work in our New York City and London hubs. and you will report directly to the manager of support engineering. 🦸🏻‍♀️ What you'll do Own

PythonAWSGCPAI
YG
📍 London, England, United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

About Yondr Yondr is a disruptor. We challenge convention and simplify complexity. A global developer, owner operator and service provider of data centers, we deliver complex data center capacity needs for the world’s largest tech companies. Our exponential growth sees us looking for extraordinary people to help accelerate us towards our vision: a tomorrow without constraints. But we can’t do this without you. About the Role With continued growth across our business, we are actively seeking to have a new member join our team. This is an exciting role to join an existing group of skilled development and investment professionals, enhancing the team capabilities and becoming an integral part of a rapidly growing business. We are searching for someone who has excellent quantitative and analytical skills, is comfortable building financial models and has experience with communicating with internal and external stakeholders. You will be a highly valued and trusted member of our ambitious and hardworking team, in a business that continues to scale to new heights. Main Responsibilities / Take responsibility for development and management of financial models and valuation analysis in support of potential transactions and investment opportunities / Support in all aspects of financing processes included due diligence, project management, data room management, financial analysis, legal negotiations and preparation of materials / Work closely with the Development and Finance teams to perform detailed financial analysis on new developments as well as existing portfolio assets / Production of presentation material for senior management, board members, investors, lenders and joint venture partners / Assist with commercial negotiation of legal contracts for transactions / Research and analysis of market trends and sector / asset valuations / Support in business strategy and individual project delivery /

GitRestAIGo
FB
📍 London, England, United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Location : Come and join us in London! Freenow by Lyft empowers smarter mobility decisions helping people to move freely and cities to thrive. One of our core goals for 2026 is the complete digitalization of the European taxi market. We work with taxi companies to provide them with our advanced dispatch and fleet management software completely free of charge. This enables them to significantly reduce operating costs, successfully differentiate themselves from major ride-hailing providers, and manage a profitable, sustainable business. To support this, we are looking for a Sales Manager who will become the face of this initiative. We look forward to your application and can't wait to have you on board for this journey! YOUR DAILY ADVENTURES WILL INCLUDE: Prospect, engage, travel and pitch our Dispatch tool to SME taxi companies in the UK. You are the driving force behind converting traditional vehicle fleets into modern, connected Freenow by Lyft partners. Guide entrepreneurs, fleet owners, and senior dispatchers through the fear of operational change. Act as the voice of our partners. You will gather on-the-ground feedback about our software and collaborate directly with our Product and Strategy teams to help "co-build" the ultimate solution. TO BE SUCCESSFUL IN THIS ROLE: 3-5 years of professional experience in areas such as B2B business development, sales, or account management. Experience in mobility, logistics, or selling SaaS solutions to SMEs is especially valued. Proven track record of managing a B2B pipeline and handling objections. You understand that even when a product is free, you still have to expertly "sell" the time, effort, and operational shift required to adopt it. Strong communication skills with the ability to build trust and long-term relationships. The ability to deeply understand a partner's business operations at a process level. You are skilled at guiding new partners step by step through the change process and ensuring they smoothly a

GitAIGoRust

Other cities to consider

More places hiring for this role

🔔

Get new senior lead junior software engineer ii react typescript java jobs in London, United Kingdom by email

Daily job updates · Unsubscribe anytime