Jobs in United Kingdom

Application Developer in United Kingdom

73 active opportunities · Updated October 2026

Explore current application developer jobs across United Kingdom. Filter by work mode, employment type, experience, department, date posted and distance.

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

WPP is the trusted growth partner for the world’s leading brands. We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth. We work with the world's most valuable brands and have global reach across 100+ markets, with deep local expertise. Our people are the key to our success. We're committed to fostering a culture of creativity, belonging and continuous learning, attracting and developing the brightest talent, and providing exciting career opportunities that help our people grow. For more information, visit WPP.com. Why we're hiring: WPP Media, as part of WPP ET, is undergoing a significant transformation, modernising our ways of working, adopting cloud-native architectures, and prioritising AI and data-driven insights. This role is crucial for infusing AI-first thinking at every level. You will bridge the gap between high-level business strategy and hands-on technological exploration, acting as a catalyst for innovation. We need someone who can work closely with our teams to discover, design, and help deliver a truly reimagined future powered by AI, ensuring solutions align with our enterprise architectural principles and standards. Are you a hands-on technologist with a solid understanding of the media or advertising business, eager to explore and apply cutting-edge AI? This isn't a traditional Enterprise Architect role focused purely on mapping and integration. Instead, we're seeking an aspiring architect who thrives on discovery and practical application. You will be instrumental in exploring how emerging technologies, especially agentic AI, can fundamentally reimagine our business operati

AWSAzureGCPRest
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. About the role You will focus on friction points around primarily backend issues for all teams in Engineering (90 Engineers). How should we do inter-service testing? Some teams are using monorepo, others aren’t. How can we bring overall stability up? Generally steering BE in the right direction. In the near future, standardising things across all of Engineering and bringing R&D teams (another 40 Engineers and Researchers) closer. You will have ownership of projects that span quarters, requiring you to have the ability to break a problem down into small steps that can be delivered and validated iteratively. You will evaluate your own work, leveraging our data pipeline and frameworks that we have established to understand the impact your features have on our commercial objectives and pivoting where necessary. You will consider the long-term direction of Engineering, making sure that we are developing the engineering capabilities that will allow us to stay ahead of the challenges we are likely to encounter in 12-18 months' time. You will work end-to-end, from our client application written in React to our monolithic backend written in Python, and lead projects that span across multiple teams. What we're looking

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G
📍 United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Location Details: At GoDaddy the future of work looks different for each team. Some teams work in the office full-time; others have a hybrid arrangement (they work remotely some days and in the office some days) and some work entirely remotely.​ Remote: This is a remote position, so you’ll be working remotely from your home. You may occasionally visit a GoDaddy office to meet with your team for events or meetings. About The Team The Commerce Site Reliability Engineering team is responsible for the reliability, scalability, and day-to-day operation of the platforms that power GoDaddy's Commerce ecosystem. We build and operate shared infrastructure, support critical production systems, and partner closely with engineering teams to ensure services remain secure, resilient, and highly available. As a Senior Site Reliability Engineer, you'll join a team that values ownership, operational excellence, and continuous improvement. Engineers are empowered to identify problems, drive meaningful change, and influence how reliability is delivered across the broader Commerce organisation. From improving operational maturity and reducing toil to modernising delivery platforms and strengthening incident response practices, this team plays a key role in enabling engineering teams to move quickly and safely. You'll work closely with engineers across infrastructure, cloud, security, networking, and application teams while helping shape the future of reliability engineering at GoDaddy. This role offers significant opportunity to broaden your impact, develop technical leadership skills, and grow toward Staff and Principal engineering positions over time. What you'll get to do... Lead reliability and operational improvement initiatives across GoDaddy's Commerce platform, helping engineering teams build and operate services safely and at scale. Own critical production systems, drive incident response and post-incident improvements, and continuously raise the bar

TypeScriptPythonAWSKubernetes
S
📍 London, United Kingdom· Full-time
✓ High-confidence listingCompany trend -97.1%
Quick readStrong listing-quality and freshness signals

At Snowflake, we are powering the era of the agentic enterprise. To usher in this new era, we seek AI-native thinkers across every function who are energized by the opportunity to reinvent how they work. You don’t just use tools; you possess an innate curiosity, treating AI as a high-trust collaborator that is core to how you solve problems and accelerate your impact. We look for low-ego individuals who thrive in dynamic and fast-moving environments and move with an experimental mindset — who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results. At Snowflake, your role isn't just to execute a function, but to help redefine the future of how work gets done. Observe is a SaaS powerhouse enabling businesses to investigate modern distributed applications 10x faster. Now, as a core part of Snowflake, we've reached a major milestone in the evolution of the AI Data Cloud. By bringing AI-powered observability directly into the Snowflake ecosystem, we've created the first truly unified platform for telemetry and business data. We are looking for a Sales Development Representative to join us at the ground floor of this expansion. At Observe, the SDR program isn't just a department—it's our leadership pipeline. We view our SDRs as the next wave of Account Executives, and we invest in you accordingly. If you are looking to turbocharge a career in tech sales, this is your training ground. We provide the tools, the mentorship, and the roadmap to turn high-potential talent into elite sales professionals. What You'll Experience: Deep Investment: From our 2-week intensive bootcamp to weekly 1-1 mentorship and bi-weekly strategy sessions, we prioritize your growth over everything else. The "In-the-Trenches" Culture: Our leadership team doesn't manage from the sidelines. We work alongside you to hone your business acumen and accelerate your path to productivity. A True Meritocracy: We celebrate diversity and reward results. Our goal is to give

AIGoRustSalesforce
Z
📍 City Of London Corporation, GBR, United Kingdom
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange™️ platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 160+ public exchanges globally and thousands of private exchanges at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role: Reporting to the Global Private Equity Practice Leader, you will drive strategic engagements with Zscaler’s Private Equity (PE) Partners. Through the Zscaler PE360 Program, you will help PE partners build cyber resiliency, boost EBITDA, mitigate risk, and accelerate value creation across portfolio companies using the Zscaler Zero Trust platform. As the primary Zscaler lead for PE firms, you will manage strategic relationships, negotiate commercial frameworks, ensure governance, and oversee portfolio outcomes. You will originate opportunities and drive value-based sales cycles tailored to each portfolio company, mobilizing Zscaler specialists, solution engineers, and experts to translate tech capabilities into clear investment impact for key stakeholders. What you'll do (Role Expectations) Strategic Relationship Management: Serve as the primary point of contact for Private Equity partners, building high-trust relati

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

Here’s a summary of the role: Build cloud software that matters, grow your technical depth, and use modern AI tooling to do your best work. This is a hands-on engineering role for someone who enjoys solving product problems, writing clean code, and helping services run reliably at scale. You’ll work on secure, scalable microservices and APIs using TypeScript, AWS , and modern engineering practices. You’ll be part of a collaborative product engineering team where you can own features, contribute to design discussions, support production systems, and keep growing across backend, cloud, and AI-assisted development workflows. Here’s a breakdown of what you’ll do, not all of it, just the important stuff: Design, build, test, and improve backend services and APIs using Node.js, TypeScript, and AWS . Take ownership of well-defined features from planning through release, including code quality, deployment, and production support . Work closely with product managers, designers, and other engineers to turn requirements into practical, reliable solutions. Contribute to technical design conversations, code reviews, and engineering standards that keep the team moving well. Use AI tools to speed up research, coding, debugging, testing, and documentation, while checking outputs carefully and applying sound judgment. Help keep systems secure, observable, and maintainable by improving monitoring, reliability, and day-to-day development practices. These are the essentials you’ll need to get an interview: 3 to 5 years of professional software engineering experience building production applications in an agile environment. Strong backend development skills with Node.js and TypeScript, including experience building APIs or microservices. Experience with React or Angular in a product engineering environment. Hands-on experience with

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

About the Team The Applications Engineering team works across research, engineering, product, and design to bring OpenAI’s technology to consumers and businesses. You’ll join the team responsible for running the core infrastructure that supports products like ChatGPT and the API. The systems we support include our kubernetes clusters, infrastructure deployment, our networking stack, cloud abstractions, and more. We seek to learn from deployment and distribute the benefits of AI, while ensuring that this powerful tool is used responsibly and safely. Safety is more important to us than unfettered growth. About the Role The cloud infrastructure team builds and maintains infrastructure abstractions allowing OpenAI to ship products quickly and scalably. In this role, you will: Design and build the development and production platforms that power our products, enabling reliability and security at scale Ensure our infrastructure can scale to the next order of magnitude Help create a diverse, equitable, and inclusive culture that makes all feel welcome while enabling radical candor and the challenging of group think Like all other teams, we are responsible for the reliability of the systems we build. This includes an on-call rotation to respond to critical incidents as needed. You might thrive in this role if you: Have 5+ years building core infrastructure Have experience operating orchestration systems such as Kubernetes at scale Have experience building abstractions over cloud platforms Take pride in building and operating scalable, reliable, secure systems Are comfortable with ambiguity and rapid change About OpenAI OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and

AWSKubernetesRestAI
Z
📍 City Of London Corporation, GBR, United Kingdom
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange™️ platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 160+ public exchanges globally and thousands of private exchanges at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role: We are looking for a Senior Manager, People Success EMEA to join our team. This is a Hybrid role based in London, reporting to the Head of People Success in the People & Culture department. As Zscaler builds an AI-native, high-performance organization, you will serve as the senior regional partner responsible for translating global talent, leadership, and capability strategies into high-impact execution across EMEA. What you’ll do (Role Expectations) Partner with EMEA business leaders and HRBPs to diagnose strategic talent priorities and align targeted People Success interventions Drive regional activation and adoption of enterprise talent, leadership, and performance strategies across diverse EMEA markets Consult with senior leaders to strengthen manager effectiveness, team performance, and critical capability development Translate workforce data, succession metrics, and capability insights into actionable reg

Z
📍 City Of London Corporation, GBR, United Kingdom
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange™️ platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 160+ public exchanges globally and thousands of private exchanges at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for an Account Executive to join our team. This is a Hybrid role, reporting to the Regional Director in the Sales and Go-to-Market department. The Zscaler Sales and Go-to-Market team is a global group of professionals who are passionate about delighting our customers, nurturing trusted partnerships, and sharing their expertise to drive a secure, cloud-enabled digital future and further cement our position as the world leader in cloud security. Sales, Customer Success, Sales Enablement, Solution Architects, Business Development, Transformation, and Technology Partnerships all work together to demonstrate the power and agility of Zscaler cloud transformation to the world. What you’ll do (Role Expectations) Manage an assigned territory focused on net new logo and upsell opportunities across the UK market within mixed verticals Drive revenue growth by selling into major level accounts (40,000 users + ) Pa

G
📍 Cambridge, United Kingdom· Full-time
✓ High-confidence listing
Quick readStrong listing-quality and freshness signals

About Graphcore At Graphcore, we’re building the future of AI compute.We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale.As part of the SoftBank Group, backed by significant long-term investment, we are delivering key technology into the fast-growing SoftBank AI ecosystem.To meet the vast and exciting AI opportunity, Graphcore is expanding its teams around the world.We are bringing together the brightest minds to solve the toughest problems, in a place where everyone has the opportunity to make an impact on the company, our products and the future of artificial intelligence. Job Summary As a Senior Machine Learning Engineer in the Applied AI team at Graphcore, you will contribute to advancing AI technology by developing and optimising AI models tailored to our specialised hardware. You will work on large scale systems where performance is critical to the success of our projects. Working closely with the Software development and Research teams, you will play a critical role in identifying opportunities to innovate and differentiate Graphcore’s technology. We seek engineers with strong technical skills and an understanding of AI model implementation at scale, eager to make a tangible impact in this rapidly evolving field. The Team The Applied AI team’s role is to be proxies for our customers, we need to understand the latest AI models, applications, and software to ensure that Graphcore’s technology works seamlessly with the AI ecosystem and at scale. We build reference applications, contribute to key software libraries e.g. optimising kernels for efficiency on our hardware, and collaborate with the Research team to develop and publish novel ideas in domains such as efficient compute, model scaling and distributed training and inference of AI models for multiple modalities and applications. If you're excited about advancing the next gen

PythonKubernetesMachine LearningAI
J
📍 United Kingdom· Full-time
✓ Quality checked

At Jamf, we believe in an open, flexible culture based on respect and trust. Our track record and thriving work environment all stem from the freedom we grant ourselves to get the job done right. We take pride in helping tens of thousands of customers around the globe succeed with Apple. The secret to our success lies in our connectivity, while operating with a high degree of flexibility. Work-life balance remains our priority while feeling connected is important to maintain our strong culture, achieve our goals, and thrive as #OneJamf. What you’ll do at Jamf: The Event Marketing Specialist EMEIA is responsible for executing, and analysing event marketing programmes specifically designed to develop the sales pipeline for Jamf’s EMEIA market. In this role, they will ensure that marketing efforts are successfully executed, appropriately placed, and coordinated with company initiatives. This role is offered as hybrid from our office in London, with the expectation to be in the office 1-2 days per week. We are only able to accept applications for those based in the UK and have sponsorship to live and work in the UK. # LI -Hybrid What you can expect to do in this role: Develop project-specific tactics and execution plans to align with the business goals, drive opportunities and accelerate pipeline growth. Execute event marketing activities to a professional standard, including meeting deadlines and communicating effectively with your leadership, and third-party vendors. Collaborate and work cross-functionally with sales and marketing teams to define strategy in support of company and department goals. Prepare, manage, and adhere to activity-specific budgets, forecast spend, anticipate needs and seek ways to improve efficiency. Monitor and report on activity and campaign performance, summarise key findings, recommend and make timely adjustments when necessary. Develop follow-up plans alongside the Jamf sales team. What are we looking for

RestAIGoRust
J
📍 United Kingdom· Full-time
✓ Quality checked

At Jamf, we believe in an open, flexible culture based on respect and trust. Our track record and thriving work environment all stem from the freedom we grant ourselves to get the job done right. We take pride in helping tens of thousands of customers around the globe succeed with Apple. The secret to our success lies in our connectivity, while operating with a high degree of flexibility. Work-life balance remains our priority while feeling connected is important to maintain our strong culture, achieve our goals, and thrive as #OneJamf. This role is offered as a hybrid role from London, the United Kingdom. We are only able to accept applications from those based in the UK or who have sponsorship to live and work in the UK. # LI -Hybrid What you’ll do at Jamf: At Jamf, we empower people to be their best selves and do their best work. As a Sales Engineer, you'll be the technical voice in the room - running demos, answering the hard questions, and helping Key Account Managers and Regional Sales Managers turn opportunities into wins across Public Sector, Healthcare, and Education. You won't be handed a script. This role comes with real autonomy : you'll decide how to position Jamf Pro, Jamf Protect, Jamf Connect, Jamf School and Jamf Mobile Forensics for the customer in front of you, build your own relationships with channel partners, and shape how AI-driven tools fit into the customer experience you're creating. Nobody expects you to be fluent in every product on day one - we're looking for someone who's fluid, curious, and ready to grow into the full portfolio. You'll join a Sales Engineering team that takes the work seriously and each other less so. Expect a genuinely fun group of people, strong support for your development, and a customer base that makes the work worth doing. What you can expect to do in this role: Run live and virtual product demos, tailored to the customer's environment, not a generic script. Become the go-to techn

RestAIGoRust
NR
📍 Dublin, Ireland; London, United Kingdom· Full-time
✓ Quality checked

We are a global team of innovators and pioneers dedicated to shaping the future of observability. At New Relic, we build an intelligent platform that empowers companies to thrive in an AI-first world by giving them unparalleled insight into their complex systems. As we continue to expand our global footprint, we're looking for passionate people to join our mission. If you're ready to help the world's best companies optimize their digital applications, we invite you to explore a career with us! Your opportunity New Relic is looking for a Senior Business Value Engineer to join our Value Strategy team, specifically covering the EMEA region . In this role, you will be the primary value architect for our accounts across Europe, the Middle East, and Africa. You will bridge the gap between technical capabilities and business outcomes, helping our customers understand the financial and operational impact of the New Relic platform. You will act as a trusted advisor to both our internal sales teams and our customers' C-suite executives, driving the "Value Realization" process from initial discovery to long-term success. What you'll do Build Compelling Business Cases: Create and deliver Business Value Assessments (BVAs) including complex ROI modeling, TCO analysis, and value realization benchmarking. Strategize with Sales: Partner closely with Sales Leadership and Account Executives to develop deal strategies that emphasize business justification over feature-set comparisons. Quantify Technical Impact: Translate technical metrics (like MTTR, Error Rates, and Cloud Cost) into business KPIs (like Revenue at Risk, Subscriber Churn, and Operational Efficiency). Drive Value Realization: Ensure customers are co-creators in their value roadmap, moving beyond the initial sale to track and report on actual value achieved post-implementation. Educate & Enable: Mentor and train the broader GTM teams on value-based selling best practices to inc

GitRestAIGo
NR
📍 Dublin, Ireland; London, United Kingdom· Full-time
✓ Quality checked

We are a global team of innovators and pioneers dedicated to shaping the future of observability. At New Relic, we build an intelligent platform that empowers companies to thrive in an AI-first world by giving them unparalleled insight into their complex systems. As we continue to expand our global footprint, we're looking for passionate people to join our mission. If you're ready to help the world's best companies optimize their digital applications, we invite you to explore a career with us! Your Opportunity Join our team as an Senior Account Executive, where you'll focus exclusively on introducing New Relic to new customers in the Nordic region. You'll build relationships with potential new clients , listen to their challenges, and show them how our solutions can help their business succeed. This is a collaborative role where you'll partner with internal teams—including solution consultants, marketing, and customer success—to create thoughtful strategies to acquire new customers and help them thrive. What You'll Do Develop Your Territory: Build meaningful relationships with key stakeholders in your target accounts for the Nordic region. Your goal will be to become a trusted advisor by understanding their needs and matching them with the right solutions from our portfolio. Create New Opportunities: Partner with our marketing and demand generation teams on campaigns, while also developing your own strategies to engage prospective customers. You'll connect with stakeholders at various levels to build trust and spark interest in New Relic. Manage Your Sales Cycle: Guide opportunities from initial conversation to close. You'll maintain accurate forecasts, keep your activities updated in Salesforce, and communicate your progress to the team. Stay Curious: Learn about your prospective customers' business goals and technology stacks. By staying informed about their industries, you can better identify opportunities where New Relic can provide signi

GitRestAIGo
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 We’re seeking a highly skilled fullstack software engineer to join our engineering team building advanced AI-driven agent systems that execute autonomous workflows, orchestrate multi-step tasks, and extend human capacity across enterprise applications. In this role, you’ll play a key part in designing, building, and scaling next-generation AI agents that integrate with enterprise data and services to solve real-world problems. You will collaborate with cross-functional teams to turn complex agent concepts into production-ready systems. 🦸🏻‍♀️ What you'll do Design, implement, and maintain scalable, secure agent-driven services and systems that autonomously accomplish tasks using modern AI frameworks. Develop and enhance robust infrastructure and high-throughput APIs, focusing on core agent capabilities such as memory, communication channels, skills, intelligent decision logic, security and workflow management. Integrate agent capabilities with backend services

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