
Wolt · London
ABOUT WOLT At Wolt, we create technology that brings joy, simplicity and earnings to the neighborhoods of the world. In 2014 we started with delivery of restau...
At Wolt, we create technology that brings joy, simplicity and earnings to the neighborhoods of the world. In 2014 we started with
delivery of restaurant food. Now we’re building the delivery of (almost) everything and you’ll find us in over 500 cities in 30
countries around the world. In 2022 we joined forces with DoorDash and together we keep on dreaming big and expanding across the
globe.
Working at Wolt isn’t always easy, but it’s definitely exciting. Here you’ll learn more, build more, and ship more than in most
other companies. You’ll be challenged a lot, but also have a lot of fun on the way. So, if you’re a self-starter with drive and
entrepreneurial spirit, this could be the ride of your life.
Wolt’s AdTech & Promotions team is building the systems that power how restaurants and brands grow on our platform. From campaign
creation to optimization and forecasting, we develop tools that help advertisers make smarter decisions and drive measurable
results. As we expand our offering, we are investing in new capabilities that combine real-time data, scalable systems, and
intuitive user experiences to unlock the next phase of growth.
We’re looking for a Staff Engineer to join the Wolt AdTech & Promotions organization, who can drive technical direction across
this space and help us build reliable, scalable systems that directly impact revenue and advertiser success.
and high-performing.
systems.
real-time environments.
trade-offs in a revenue-driven environment.
systems.
This position is based in London
looking for someone language-agnostic.
shared outcomes.
locally.
At Wolt, this role provides a rare opportunity to work on challenging AdTech problems at scale, where technical decisions directly
impact revenue and user experience.
Our compensation follows a total compensation model, combining a competitive base salary with DoorDash RSUs.
You will play a key role in building and evolving the next generation of advertisement tools and platforms, shaping how
advertisers create, manage, and optimize campaigns across Wolt. This is not just about maintaining systems, but about defining and
scaling new capabilities in a fast-growing domain.
As a Staff Engineer, you will have end-to-end ownership and high autonomy, with the ability to influence architecture, product
direction, and engineering practices across teams. Your work will have clear, measurable business impact, directly contributing to
revenue growth and advertiser success.
You’ll be part of a global company operating at scale, collaborating with teams across Europe and the US, and solving problems
that span multiple markets, use cases, and customer segments.
This role also offers strong opportunities for career growth and scope expansion, whether through deep technical leadership,
cross-domain influence, or progression toward more senior individual contributor roles.
Alongside the technical challenge, you’ll work with talented engineers and leaders in a diverse and international environment,
shaping both our systems and engineering culture while mentoring and learning from others.
We’re committed to growing and empowering a more inclusive community within our company, industry, and cities. That’s why we hire
and cultivate diverse teams of people from all backgrounds, experiences, and perspectives. We believe that true innovation happens
when everyone has room at the table and the tools, resources, and opportunity to excel.
ABOUT THE JOB Validate the ML stack that turns accelerator hardware into trusted AI performance. This role sits where modern ML models meet Graphcore’s software and hardware stack. You will test, benchmark and validate complex systems before they reach customers. Your work will expose regressions, correctness issues and performance limits across frameworks, models and execution environments. You will help teams understand what is working, what is breaking and why. You will run open source models, build automated benchmarking pipelines and create targeted tests for low level ML behaviour. That includes numerical precision, quantisation, attention mechanisms, distributed execution and model subgraphs. This is a role for someone who wants to stay close to how AI systems really work. You will not design new models, but you will make them run reliably on ambitious infrastructure. THE TEAM AND CULTURE The ML QA team is where Graphcore’s ML software stack comes together for validation. Work spans unit tests, full model benchmarks, distributed workloads, simulators, emulators and hardware targets. Engineers are expected to take ownership, question assumptions and improve how testing is done. The team moves quickly, but decisions are grounded in evidence, benchmark data and technical discussion. You will work closely with software, infrastructure and hardware teams. Squads organise around priorities, with space for engineers to shape roadmaps and raise the quality bar. WHAT WE’RE LOOKING FOR · Strong experience in Machine Learning or ML-adjacent software engineering roles. · A solid grasp of neural networks, training, inference, numerical precision and performance trade-offs. · Hands-on experience with PyTorch, TensorFlow, JAX, Triton or similar ML frameworks and tools. · Strong Python skills for automation, experimentation, benchmarking and reporting. · Experience designing, running and analysing ML benchmarks or model experiments. · Confident debugging skills in Linux, with curiosity about model behaviour and system performance. BENEFITS · Unlimited annual leave · Up to 5% matched pension · Phantom equity – share in Graphcore’s success · True flexibility in how and where you work · Office spaces designed for collaboration · Free food and an on-site barista · Health cash plan · Income protection · Life assurance · Along with other benefits you can choose from (private medical insurance, dental plan etc) We welcome people from all backgrounds and experiences and are committed to building an inclusive environment where everyone can do their best work. We’re an equal opportunity employer and recognise that everyone brings different strengths and perspectives. If you need any adjustments during the interview process, just let us know - we’re happy to support you. JOIN THE TEAM AT GRAPHCORE Graphcore is one of the world’s leading innovators in Artificial Intelligence compute. It is developing hardware, software and systems infrastructure that will unlock the next generation of AI breakthroughs and power the widespread adoption of AI solutions across every industry. As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for some of the world’s most transformative technologies. Together, they share a bold vision: to enable Artificial Super Intelligence and ensure its benefits are accessible to everyone. Graphcore’s teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives. A melting pot of AI research specialists, silicon designers, software engineers and systems architects, Graphcore brings together deep expertise to solve complex problems and deliver meaningful progress in AI compute. If you want to validate the systems behind next generation AI compute, we’d love to hear from you. Apply now to help build what comes next.
THE MISSION: PLATFORM AS A PRODUCT Your mission is to bridge the gap between "infrastructure" and "developer success". You will transform our platform from a set of tools and processes into a cohesive internal product. You will lead a team of engineers through a period of growth and establish a "paved road" that allows our product teams to ship with zero friction. THE IMPACT: DRIVING HIGH-VELOCITY DELIVERY You aren't inheriting a fixed roadmap or team, you are shaping it! Working together with our Staff Engineer, you will define what good looks like and how to become a high performing team. You will oversee delivery timelines, scope and are not afraid of making highly impactful decisions. You don’t care about the ticket throughput, you care about work done. * Ambiguity: You are not afraid of working with ambiguous requirements and turning them into concrete deliverables. You are comfortable making trade-off decisions and understand that “perfect is the enemy of done”. * Team Evolution: You act as a coach and a talent magnet. You will be responsible for the growth, performance, and structure of the Platform unit, ensuring we have a vocal, collaborative, and high-performing culture through continuous learning. * Raise the Bar: You drive Platform excellence, may it be developer experience, infrastructure or SRE. Communication: You communicate regularly with the other Engineering Managers, manage their expectations and hold them accountable for delivery dependencies. THE PROFILE: THE PRACTICAL STRATEGIST We are looking for a leader who builds high-performing teams. Whether your background is in Platform, Backend, or Data Engineering, you are someone who thrives on solving "the hard stuff", is motivated to educate themself and never leaves a job 80% finished. This is your chance to shape a Platform Domain from the ground up. * High Agency: You don't wait for permission to fix a glaring problem. You build the business case, get the buy-in, and get it done. * Execution-Focused: You have a track record of taking complex initiatives across the finish line. You understand that "80% done" is often where the most critical technical debt lives, and you have the discipline to drive projects to true 100% completion. * Strong opinions, weakly held: You have strong opinions on how things should be done, but you are Okay to disagree and commit in order to move forward. ABOUT BLACKLANE Our mission is simple but powerful: to become the world’s leading premium, global chauffeur service. Operating in 50+ countries, we reimagine chauffeur-driven rides by prioritizing reliability, innovation, and first-class service at every step. Blacklane is also at the forefront of sustainable mobility efforts, continuously working to reduce our operational impact on the planet. OUR COMPANY CULTURE & VALUES Blacklane has grown from a two-person startup in Berlin to a global team of over 300 people representing 54+ nationalities. Our culture is powered by our commitment to three core values: Care, Drive and Excellence. * Care - We are invested in each other's well-being and professional growth. * Drive - We act with pace and determination. We are ambitious, committed to a growth mindset, and champion ownership and delivery. * Excellence - We understand our customers so we can exceed expectations. We support our people through initiatives like Employee Resource Groups (ERGs), mentorship programs that bring our values to life. We welcome—and actively support—employees to create or join the communities that are important to them. WHY JOIN US IN A BLACKLANE ON THE FAST LANE? 💙 100% employer-paid health insurance for you and your dependents, with 24hr GP access 🌴 28 vacation days per year, increasing with tenure 🏦 Company pension with up to 5% employer contribution 🍽️ 15 GBP weekly Just Eat lunch vouchers for UK hub employees 💪 Your Mental and Physical Health → No compromise with Nilo and Wellhub 🎓 Continuous learning through LinkedIn learning and L&D budget 🏢 Hybrid setup: 3 days a week in our London office 🚀 Fair pay and benefits tailored to local markets 🏆 Long-term incentive scheme 🚘 Mystery Rides: Quarterly Voucher to enjoy personal trips around the world with Blacklane and experience our service from a guest’s perspective. Do you have any questions or want to know more about our way of working? Feel free to contact us. We’re happy to connect! We place great value on equal opportunities. Therefore, we welcome everyone to apply! Blacklane will never ask you to pay money towards any job application. Do not make payment to anyone pretending to be from Blacklane during your recruitment process. If you suspect any scam-relevant activity, please talk to us as soon as possible. We're here to take care of you throughout the recruitment process.
LEAD SOFTWARE ENGINEER - DEVELOPER EXPERIENCE (DEVEX) IN SHORT At On, we believe technology should move as fast as a runner. We are building the foundation that allows our engineering organization to scale, innovate, and deliver value without friction. We are looking for a Lead Software Engineer to join the Developer Experience (DevEx) team. In this hands-on role, you will build the platform that empowers dozens of technology teams to build, ship, and operate services effortlessly. You will be involved in architecting and building our "Golden Path," ensuring that speed, safety, and reliability are baked into every developer's workflow. YOUR MISSION * Help Engineer the Golden Path: Design and implement highly automated CI/CD pipelines (GitHub Actions) and common templating (Typescript/Node) systems that allow a developer to go from "idea" to "production-ready service" in minutes. * GraphQL Infrastructure: Act as a core contributor to our central Apollo GraphQL API Gateway. You will help manage the supergraph composition, runtime stability, and schema governance standards to ensure a consistent contract for all consumers. * Help to Build the Internal Developer Platform (IDP): Help develop our Cloud Abstraction Layer and Developer Portal. This includes building self-service tools, CLIs, and service catalogs that reduce cognitive load for engineers. * SRE & Observability: Integrate "secure-by-default" practices and robust observability into the platform. You’ll build dashboards (NewRelic) and monitoring patterns that provide teams with deep insights into their service health. * Technical Excellence & Advocacy: Write high-quality documentation, help with code reviews and advocate for DevEx best practices across the organization. * Friction Reduction: Actively hunt for bottlenecks in the software development lifecycle. Whether it's a slow build or a complex deployment process, you'll be involved in fixing it. YOUR TECHNICAL STORY * Product Thinking: You treat internal developers as your customers. You listen to their pain points and iterate on the platform based on real-world feedback. * Infrastructure as Code: You are comfortable with Terraform and Kubernetes (GCP experience is a plus), treating infrastructure with the same rigor as application code. * Automation Mindset: You are passionate about CI/CD (GitHub Actions) and building developer tooling (CLIs, SDKs, or Portals). * AI-Augmented Engineering Workflows: You leverage (or at least have an active interest in) the latest agentic coding tools to 10x your productivity, blending deep technical principles with AI-assisted workflows. As a power user of AI, you orchestrate complex builds and bypass boilerplate to deliver robust, scalable code at pace, ensuring our TypeScript/Node.js environment remains lean and efficient (experience in other tech stacks will be considered). * Architectural API Design: Experience in crafting robust API contracts with a focus on GraphQL Federation; familiarity with the Apollo tech stack is highly regarded. * Data-Driven: You understand DORA metrics and DevEx signals, using them to measure the success of the tools you build. WHAT SUCCESS LOOKS LIKE * Velocity: A measurable reduction in lead time for new services reaching production. * Autonomy: Product teams can provision infrastructure and deploy APIs independently using your self-service tools. * Stability: High adoption of standardised "Golden Path" templates, leading to fewer production incidents and faster MTTR. * Satisfaction: High internal Developer Satisfaction (DevEx) scores and positive feedback on the tooling you maintain. * Team Spirit: You thrive in a high-performing "sports team" culture, contributing to the power of the whole through consistent teamwork and earned leadership. MEET THE TEAM The Developer Experience team serves as the bridge between infrastructure and product. We don't just measure "uptime"; we measure "time to value." As a Staff Engineer on this team, you will be at the heart of our engineering culture, defining the standard for how software is built and delivered at On.