Back End Engineer Jobs

Our Global Structure Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global team. Join us in our mission to transform the way people shop and eat, where impact, innovation and growth drive everything we do. Our Global Engineering teams tackle complex technical challenges across a global, three-sided marketplace, building and scaling systems that serve millions of customers, riders and partners every day. We're looking for a Machine Learning Engineer to join our London office as part of a Global DoorDash Engineering team (working hybrid, 3 days in the office). Our New Verticals team exists to grow monthly active usage outside of restaurant ordering — groceries, retail, and everything in between. That means turning someone who only orders restaurant food into someone who also uses the app for a grocery run, and turning dormant users into active ones. You'll work on the surfaces that make that happen: the homepage, vertical landing pages, and the notifications that bring people back. This role sits closer to the personalisation and ranking side of that mission, working alongside colleagues across DoorDash, Deliveroo and Wolt. What You'll Be Doing Build and improve ranking models for vertical landing pages (grocery, retail), deciding what a user sees first when they land on a store page Design models that blend new-vertical content into a homepage built around restaurant ordering, without disrupting the core experience Build personalisation models that translate a user's existing behaviour into relevant recommendations for verticals they haven't tried yet Contribute to notification targeting — who gets notified, with what message, and when, to drive adoption of new verticals What You'll Need to Thrive Minimum 3+ years of experience as an ML Engineer or Data S

Our Global Structure Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global team. Join us in our mission to transform the way people shop and eat, where impact, innovation and growth drive everything we do. Our Global Engineering teams tackle complex technical challenges across a global, three-sided marketplace, building and scaling systems that serve millions of customers, riders and partners every day. We're looking for a Machine Learning Engineer to join our London office as part of a Global DoorDash Engineering team (working hybrid, 3 days in the office). Our New Verticals team exists to grow monthly active usage outside of restaurant ordering — groceries, retail, and everything in between. That means turning someone who only orders restaurant food into someone who also uses the app for a grocery run, and turning dormant users into active ones. You'll work on the surfaces that make that happen: the homepage, vertical landing pages, and the notifications that bring people back. This role sits closer to the personalisation and ranking side of that mission, working alongside colleagues across DoorDash, Deliveroo and Wolt. What You'll Be Doing Build and improve ranking models for vertical landing pages (grocery, retail), deciding what a user sees first when they land on a store page Design models that blend new-vertical content into a homepage built around restaurant ordering, without disrupting the core experience Build personalisation models that translate a user's existing behaviour into relevant recommendations for verticals they haven't tried yet Contribute to notification targeting — who gets notified, with what message, and when, to drive adoption of new verticals What You'll Need to Thrive Minimum 3+ years of experience as an ML Engineer or Data S

Our Global Structure Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global team. Join us in our mission to transform the way people shop and eat, where impact, innovation, and growth drives everything we do. We're looking for a Marketing Executive, Value & Promotions to join our Marketing Team in Dubai. This is a hybrid role. Role Overview As Marketing Executive, Value & Promotions, you will report to the Senior Marketing Manager, Value & Promotions for the Middle East. You will own the day-to-day delivery and performance of our promotional and incentive campaigns, working cross-functionally to ensure every offer is targeted, well-timed, and commercially sound. Incentives sit at the centre of how customers experience value on the platform - they influence whether someone tries the app, comes back, or drifts away. This role owns that layer day to day: turning the promotional calendar into targeted campaigns across the customer lifecycle, and making sure every campaign earns its budget. What You'll Be Doing: You’ll be joining the Middle East Marketing team. You will work cross-functionally with Commercial, Marketing, Finance, Tech, Data Science, and Global/Central teams to build promotional plans that improve customer experience and drive operational excellence. Here’s What Your Day-to-day Might Look Like: Promotional Calendar Execution: Own the day-to-day execution of the Middle East promotional calendar, translating the quarterly plan into targeted campaigns across the customer lifecycle: acquisition, activation, retention, and win-back. Promo Strategy Development: Contribute to the development of strategies focused on how value propositions can change customer behavior and drive ROI for Deliveroo and our Partners.

Instawork is on a mission to create meaningful economic opportunities for skilled hourly professionals in communities around the globe. Our AI-powered labor marketplace helps local businesses scale, and enables global technology companies to push the frontiers of robotics and AI. Backed by world-class investors like Benchmark, Spark Capital, Craft Ventures, Greylock, Y Combinator, and others, we’re looking for exceptional talent to reimagine the way the world works. About IRL (Instawork Robotics Labs) Researchers at UC Berkeley have identified a “100,000-year data gap” - the gulf between what trained AI language models and what physical robots actually have to learn from. Closing that gap is the defining infrastructure challenge of the physical AI era. IRL is Instawork’s answer to it. We deploy skilled workers into real commercial and residential environments - kitchens, warehouses, hotel floors, homes - to capture the high-fidelity task data that the world’s leading Robotics labs use to train their foundation models. Read more here . What you’ll do Lead Workforce & Operations: Drive day-to-day workforce management for Clippers, Graders, Regraders, SMEs, and ICs across shifts/sites, optimizing staffing, capacity planning, and throughput against SLA targets. Implement Quality Systems & Methods: Maintain the QMS and apply structured methods (RCA, CAPA, FMEA, 8D, SPC) to address recurring defects, calibration drift, gold-sample injections, and consensus checks. Own SOPs & Process Standards: Build, version-control, and continuously iterate SOPs for existing and new program launches, ensuring floor adoption and structured QA onboarding/re-calibration paths. Bridge Cross-Functional Teams: Translate engineering data requirements into floor-executable QA criteria, report field issues back with evidence, and represent QA in program launches and crisis calls. Drive Data-Led Quality: Monitor and analyze key QA metrics—defect/reject rates, inter-grader agreement (ka

What you’ll do Own the tissue-class segmentation and labeling models for the ultrasound CT clinical analysis layer, and the pipelines that make them trainable and verifiable. Retune across 2D per-slice, 3D volumetric, and 2D×3D fusion as reconstructed image inputs are continuously updated, and clinical indications for use expand. Define training/evaluation pipelines, datasets, and metrics from the ground up or from open source; map model behavior to user needs and design requirements. Work with data labeling contractors, expert clinicians, and our internal cloud/data teams on labeling specs, QC, and dataset versioning. Help productionize models into a versioned, HIPAA-bound analysis service: reproducible/low-latency inference, per-prediction confidence, drift monitoring, and safe fallbacks. What we’re looking for Strong applied ML experience with a track record of developing new models — architecting, training, and evaluating from scratch as well as benchmarking against existing models. Experience with image segmentation (semantic/instance, 2D and ideally 3D/volumetric) and the modeling and training-data choices that make it robust across diverse patient anatomy. Comfortable moving fluidly between open-ended research iteration and producing quantifiable, testable models. Fluent in modern deep-learning tooling (e.g., PyTorch) and current development practices. Comfortable working under design controls, where model changes carry documentation and verification weight. Useful experience Image segmentation and label generation with modern architectures (U-Net / nnU-Net, 3D U-Net, transformer-based and promptable segmentation like SAM), including the geometry that ties voxel- and mesh-level predictions back to a coordinate frame. Learning under limited or noisy supervision: self-supervised / semi-supervised methods (masked autoencoders, contrastive pretraining like DINO/SimCLR), active learning, weak labels, and simulation-driven pretraining. Hands-on experience with data

The Opportunity Adobe is driving strategic growth with global Private Equity (PE), Venture Capital (VC), and Sovereign Wealth (SWF) companies through a new go to market – Adobe Private Capital (APC). We are investing in high-calibre, experienced individuals with a background in managing large scale transformation programs with large corporates, or experience working within a PE firm as an Operating Partner. We are looking for individuals with a start-up mentality – enthusiasm and resilience backed up by a passion for quality of thinking and execution. As an APC Value Creation Director, you will have responsibility for coordinating efforts across all aspects of the Adobe Digital Experience and Digital Media lines of business, working with PE firms to drive value within Portfolio Companies across the globe. What you’ll do Work with analysts to define priority portfolio companies that can derive significant value from the use of Adobe’s integrated technology stack. Lead relationships with Operating Partners in the PE, VC and SWF firms to drive discussion on value levers within the Portfolio Company – leading with industry insights collated from Adobe’s proprietary sources and external data. Work with a small group of delivery partners to define a roadmap for execution and value realisation. Define and build an effective joint governance model ensuring alignment and sponsorship across the account. Develop and maintain strategic relationships with customer and Adobe executives to support priority initiatives and long-term account growth. Drive the adoption of Adobe products and innovations within the portfolio through thoughtful development of business cases that map back to customer priorities. Grow revenues across the business (software, services, and suppo

This role is for applicants actively looking to start before December 1, 2026. Who we are About Stripe Stripe is a technology company focused on improving the conditions for economic growth and prosperity. We build programmable financial infrastructure, rethinking from first principles how financial services should work, to make it easier and cheaper for any business to start and scale. More than 10 million businesses build on Stripe, spanning the economic frontier—from solo founders to established enterprises—united by a practical focus on growth. The most ambitious companies in the world use Stripe as core infrastructure to grow faster. They process trillions of dollars a year on Stripe, equivalent to around 1.6% of global GDP. While economic growth makes everyone better off, open markets also enable greater variety. When any business can easily serve a global customer base, the quality and diversity of products in the world increase, and craft and creativity are unleashed into the smallest niches. Our own growth is wholly contingent on the success of the businesses building on Stripe. We therefore invest back into our technology at an unusual rate. We make upgrades to our products every single day to deliver compounding gains to our customers. We maintain some of the most reliable APIs on the internet. We build entirely new pieces of financial infrastructure to enable new ideas. And our significant advances in risk and fraud infrastructure over many years are making the internet economy safer and more accessible. Though people at Stripe don’t tend to take themselves seriously, Stripe is a fairly serious place: our customers are depending on us for their livelihoods. We admire ambition, intensity, curiosity, humility, and rigor. The most effective people become knowledgeable about many domains besides their own. Any company is an applied exercise in understanding some aspect of society or the market. In working with so many (especially the new and innovative

This role is for applicants actively looking to start before December 1, 2026. Who we are About Stripe Stripe is a technology company focused on improving the conditions for economic growth and prosperity. We build programmable financial infrastructure, rethinking from first principles how financial services should work, to make it easier and cheaper for any business to start and scale. More than 10 million businesses build on Stripe, spanning the economic frontier—from solo founders to established enterprises—united by a practical focus on growth. The most ambitious companies in the world use Stripe as core infrastructure to grow faster. They process trillions of dollars a year on Stripe, equivalent to around 1.6% of global GDP. While economic growth makes everyone better off, open markets also enable greater variety. When any business can easily serve a global customer base, the quality and diversity of products in the world increase, and craft and creativity are unleashed into the smallest niches. Our own growth is wholly contingent on the success of the businesses building on Stripe. We therefore invest back into our technology at an unusual rate. We make upgrades to our products every single day to deliver compounding gains to our customers. We maintain some of the most reliable APIs on the internet. We build entirely new pieces of financial infrastructure to enable new ideas. And our significant advances in risk and fraud infrastructure over many years are making the internet economy safer and more accessible. Though people at Stripe don’t tend to take themselves seriously, Stripe is a fairly serious place: our customers are depending on us for their livelihoods. We admire ambition, intensity, curiosity, humility, and rigor. The most effective people become knowledgeable about many domains besides their own. Any company is an applied exercise in understanding some aspect of society or the market. In working with so many (especially the new and inno

About us EVERY™ is a leading VC-backed food tech ingredient company and market leader using precision fermentation to create animal proteins without the animal for the global food and beverage industry. EVERY™ is a team of passionate change-makers who are reimagining the factory farm model with a kinder, more sustainable alternative. Leveraging precision fermentation to produce hyper-functional and one-to-one replacement proteins from microorganisms, EVERY™ is on a mission to decouple the world’s proteins from the animals that make them. We are a passionate, determined (and fun!) team with a vital objective, and we're on the lookout for like-minded people to join our mission. For more information, visit www.every.com The Downstream Process Engineer II will be an integral member of our downstream process development team. You will use experimentation to optimize Every’s production process and then see the results of your changes in action at pilot and commercial-scale biomanufacturing sites. This is an excellent opportunity for someone with laboratory and tech transfer experience, who wants to make an impact at scale. What you'll Accomplish Optimize the Every downstream process via an iterative cycle. Improvements are developed in the laboratory, scaled up to an external pilot plant, and learnings are taken back to the lab for further troubleshooting and improvement. Perform various unit operations at the Every HQ such as TFF, depth filtration, chromatography, spray drying and other purification/separation processes. Develop and review tech transfer documentation to ensure successful scale up trials. Travel to external pilot plants to review the scale up of novel processes. Coordinate with third parties such as pilot scale equipment vendors to arrange internal and external trials. Partner with Every scientists and engineers to bring their bench ideas to pilot scale. Analyze results and report data to enable appropriate interpretation and

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. Product Manager, Product Platform (India) Company Overview Okta is The World’s Identity Company. We free everyone to safely use any technology - anywhere, on any device, for any app. Our Workforce and Customer Identity Clouds enable secure yet flexible access, authentication, and automation that transforms how people move through the digital world, putting Identity at the heart of business security and growth. Role Overview: Product Manager, Product Platform This is a rare 0-to-1 opportunity to build a brand-new, high-visibility capability that touches every Okta customer: backup and recovery to strengthen the resilience of our system. You’ll be responsible for building a modern, self-service experience that allows IT Admins to recover back their accidentally or maliciously deleted identity objects. You'll partner closely with Engineering, Field, Pricing & Packaging, and Product leadership to shape a capability with direct, measurable impact on customer retention and revenue growth. Key Responsibilities Contribute to the long-term product vision and strategy for Okta's resilience strategy, ensuring the backup and recovery roadmap scales with the breadth of Okta's customer base and product portfolio. Design a self-service recovery center to ensure customers can seamlessly and securely track their deletions and changes and revert back across the entire Okta ecosystem. Collaborat e with India-based engineering and development scrum teams to d

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars. SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next. ABOUT THE ROLE: You own brand revenue. This is a hunter role. You will own a portfolio of global brand advertisers across APAC — winning new spend, reactivating lapsed or dormant accounts, and expanding existing partnerships. You are the commercial owner for your book of business: strategy, relationships, pipeline, and revenue. You will work as a trusted advisor to brand marketers and their agency partners, building consultative, insight-led programs that put X at the center of both brand and performance plans. You will work as a peer with the Agency Development and X Cross Functional Teams — close partnership, distinct ownership. This role reports to the Head of Global Brands, APAC. RESPONSIBILITIES: Own and grow revenue across an assigned Global Brands portfolio in APAC. Hit and exceed quarterly and annual targets through new business, expansion, renewals, and reactivation. Hunt. Build a disciplined pipeline of net-new and returning advertisers. Prioritize client reactivation — bringing lapsed and under-invested global brands back onto the platform with a clear commercial plan. Establish and deepen relationships with marketing decision-makers at global brands and with the agen

At Playlist, life's richest moments happen when people step away from screens to move, connect, explore, and play. We're building the definitive platform for intentional living, connecting people with inspiring experiences in fitness, wellness, and beyond. With popular brands like Mindbody and ClassPass, Playlist empowers businesses and individuals, making it effortless for aspirations to become actions. Join us in reshaping technology's role to foster meaningful, real-world connections. Mindbody equips wellness entrepreneurs with technology to support thriving businesses and create exceptional experiences. Innovation and curiosity drive our culture, connecting businesses and individuals through cutting-edge solutions. Join us if you're passionate about enhancing wellness through technology. The Role You'll Play Playlist builds software for the wellness and services economy. Our platforms include Mindbody for fitness and wellness studios, Booker for appointment-based businesses, and Kite for large multi-location franchises, with more verticals on the way. Tens of thousands of businesses run their day-to-day operations on our products. As a Software Engineer III on this team, you’ll help build the outbound marketing side of Playlist's CRM and Marketing platform — the tools our customers use to stay in touch with their clients and bring them back. That includes: Marketing campaigns Automated lifecycle journeys Re-engagement and retention automation Audience and subscriber management Right now, much of this runs on a third-party marketing platform. We’re building those capabilities in-house, starting with a customer segmentation engine that lets businesses define and target audiences from their own data. There’s a lot to build, and we’re hiring engineers to make it happen. What You'll Do Build and ship production code for services behind campaigns, journeys, and audience management Develop and test APIs , ensuring customer and subscriber records stay in s

Build What Matters. Build Your Future. Catamount builds the spaces communities depend on every day. From distribution centers that keep goods moving and medical facilities that provide critical care, to housing, restaurants, and fire stations serving local neighborhoods, our work supports real life. As a best-in-class, 100% employee-owned general contractor with a national reach, we complete projects across diverse markets and regions. This diversity empowers us, keeps our teams moving forward, and creates long-term opportunities for the people shaping our company. Why choose Catamount? We’re financially stable, growing, and built for the long haul. Our extensive national backlog and diverse project types provide stability, momentum, and opportunities. At Catamount, careers advance. Employee-owners can grow, move between project types and markets, and build long-term careers without starting over. Teams are carefully staffed, work-life balance is prioritized, and our people are seen as long-term assets. Diverse work. Real stability. Shared success. Position Overview: Our Superintendents are the “boots on the ground”. They are responsible for ensuring that the project progresses according to plan and Owner specifications, in conjunction with the Project Manager, Architects and Owners. They supervise and coordinate the daily activities of construction workers, contractors, sub-contractors and Assistant Superintendents. They lead every step of the way, and when the project is complete they can truly say, “I built that”. Role & Responsibilities: Onsite during all work activities, using experience, research and networking with other Catamount Staff to ensure the job meets or exceeds client expectations Maintain communication, from holding weekly sub-contractor meetings, to communicating change orders, schedule, and back charges with the Project Manager, and addressing problematic subc

Who we are: Since 2009, we've been on a mission to bring sustainable fashion to everyone. Named one of Fast Company’s Brands That Matter and winning a Best Carbon Footprint award, we have big goals like being Climate Positive by 2025 , Circular by 2030 , and pushing the whole industry forward along the way. Our work has gotten love in Drapers and Sourcing Journal , and TIME wrote about how great our CEO, Hali Borenstein, is. Basically, we're saving the Earth and looking damn good doing it. We're a global brand with 50+ stores (and counting) around the world, and our own sustainable factory in LA . We innovate across categories like accessories , swimwear , and sleepwear , and we reach millions of people with campaigns like this , this and this . None of this work is possible without the incredible people behind it. We're a mission-based company that invests in an inclusive culture, so we can innovate together and ensure everyone has the space to grow, thrive, and belong. And starting right now, we want to do all that with you. Work Location/ Schedule: Available to work a minimum of 32-40 hours per week. Available to work a minimum of 5 days per week, weekends included. Able to work flexible schedule (days, nights, weekends, & holidays if required to meet the needs of the business). What You’ll Do: Support the operational efforts required to achieve store goals. Maintain seamless store operational procedures. Consistently use and understand processes and procedures to track in store inventory accurately. Track, receive and process all inbound inventory shipments. Complete inventory related tasks as necessary with an elevated attention to detail, including inbound and outbound store transfers, shipment, and omni channel order processing. Complete shipment processing - receiving, hanging, steaming, tagging (when applicable) and organizing in the back of house. Support the process of completing markdowns when applicable. Submit facilities tickets to ensure mai

About the Team The Code Scalability team owns build systems and continuous integration across DoorDash. When a shared dependency changes or more teams contribute to a monorepo, the cost of building software can grow for everyone. We tackle that challenge with Bazel, Buildkite, and infrastructure that keeps everyday development efficient. Our work gives teams a dependable path from a code change to a completed build, with fewer delays and less infrastructure troubleshooting. About the Role As a Senior Software Engineer on Code Scalability, you will solve the engineering problems behind building software at DoorDash’s scale. A change deep in a monorepo can trigger work across many projects; your job is to make that work efficient, predictable, and easy to investigate when something goes wrong. Projects span Bazel configuration and tooling, Buildkite orchestration, build execution and caching, and the services that support them. You will identify where improvements matter most, make the technical decisions, and work with teams across DoorDash to put those changes into practice. The impact of this role extends to every team that depends on our platform. Shorter queues give engineers more time to iterate, dependable pipelines prevent interruptions, and useful diagnostics help them get back to their work. You will measure progress through those outcomes, alongside the cost and maintainability of the infrastructure you own. You’re excited about this opportunity because you will… Evolve build and CI workflows for large monorepos, keeping feedback fast and changes manageable as dependencies, code volume, and the number of contributing teams grow. Develop Bazel rules, toolchains, and integrations that keep builds reproducible and make shared build infrastructure easier for teams to adopt across large monorepos. Improve Buildkite pipeline throughput and reliability by reducing queue times, addressing build bottlenecks, and making better use of CI compute capacity. Reduce