Developer Experience - Backend & Infra

Join Zopa as a Platform Engineer focused on enhancing developer experience! In this role, you will be instrumental in optimizing our development platform, facilitating a seamless workflow for our engineering teams. Your expertise in platform technologies will empower developers to build and innovate more efficiently.

About Our TeamJoin the Local Developer Experience (DevEx) team at Deliveroo, part of the Foundations group, where we empower engineers to rapidly develop, test, and deploy high-quality services with confidence. We enhance and innovate the local developer experience across the Deliveroo group through a streamlined, DevContainers-based development platform, facilitating agentic workflows alongside integrated IDE tools. Our mission is to elevate engineering standards in Quality, Velocity, and Efficiency by creating scalable framework-level tooling and developer workflows.About the RoleAs a Staff Platform Engineer, you will be recognized as a subject matter expert in at least one key technical domain and will be responsible for implementing solutions that yield significant group-wide outcomes. You will lead the technical direction for your team, eliminate complex technical obstacles across multiple teams, and mentor fellow engineers. Reporting to senior managers, you will collaborate with leadership to drive broad impact.Your ResponsibilitiesTechnical LeadershipDefine and implement technical solutions for critical business challenges, gaining an understanding of the context surrounding major organizational decisions.Oversee the technical architecture for both local and remote development workflows, including DevContainers, IDE remote backends, and seamless integration points with our engineering ecosystem.Design and continually refine the paved-path developer journeys, focusing on time-to-first-change, onboarding processes (MSC distribution, Tailscale setup), IDE remote flows, and user experience for daily developer tasks. Measure and iterate based on developer metrics and feedback.Lead the integration strategy for remote execution (e.g., BuildBuddy), enhance development efficiency on the company monorepo (Pedregal), and establish caching/invalidation methods to ensure swift, predictable developer workflows.Additionally, manage project timelines and risks while maintaining a sustainable team pace.Collaboration & LeadershipFacilitate alignment among non-adjacent teams and disciplines (Product, Security, Core Infrastructure, and Product Engineering) to tackle unstructured challenges. This includes coaching team members at all levels and nurturing emerging leaders within the team.

Backend Platform EngineerWe are looking for a talented Platform Engineer to join our elite team at mlabs, a pioneering software development firm leading the charge in the fintech and digital asset industries. Our organization is a major contributor to one of the world's largest and most dynamic crypto social networks, having generated upwards of $600 million in revenue since early 2024. At the crossroads of high-scale social coordination and decentralized finance, we are committed to revolutionizing the future infrastructure.This role is crucial to maintaining the security, scalability, and integrity of our platform, which is attracting global attention. The ideal candidate will enhance our backend engineering and infrastructure security, executing robust controls across a complex cloud and blockchain ecosystem.Key Responsibilities:Pipeline Security: Develop and maintain a secure CI/CD pipeline, integrating automated security checks throughout the development lifecycle.Infrastructure as Code (IaC): Design and implement infrastructure following IaC principles while adhering to security best practices.Security Automation: Automate security scanning and monitoring of our cloud and blockchain infrastructure for real-time threat detection and mitigation.Container Security: Establish and manage advanced security protocols for high-throughput containerized environments.Observability & Metrics: Create and sustain comprehensive security dashboards to monitor and report on our security posture.Cross-Functional Collaboration: Work alongside development teams to address security issues and enhance code-level security standards.Secrets & Key Management: Design and implement sophisticated solutions for secrets management and cryptographic key handling.Configuration Baselines: Set and enforce secure configuration baselines across our entire cloud infrastructure.

Join our dynamic Data Processing Product Area at Spotify, where we create innovative platforms and tools that transform the way we process, manage, and leverage data on a massive scale. Our team empowers various departments within Spotify to tackle intricate data challenges with assurance. We emphasize enhancing efficiency, quality, and innovation, enabling engineers and data professionals to accelerate their work while ensuring reliability and cost-effectiveness.

Role Overview Spotify is looking for a Backend Engineer to join the Data Platform team in London. This position focuses on building and improving the backend systems that power Spotify’s data processing and analytics. The work supports a seamless experience for millions of listeners around the globe. What You Will Do Develop and maintain scalable backend systems for data processing and analytics. Work closely with cross-functional teams to optimize Spotify’s data infrastructure. Help ensure high availability and strong performance across backend services. About the Team The engineering team at Spotify values collaboration and technical excellence. The Data Platform group plays a key role in supporting the company’s ability to deliver music and insights at scale.

Join Contentful as a Senior Backend Engineer specializing in our cutting-edge AI Platform. In this pivotal role, you will architect and develop robust backend systems that support our innovative AI solutions. Collaborate with a dynamic team of engineers and data scientists to design scalable APIs and enhance our platform's capabilities.

Wheely provides premium transportation services in major cities across Europe, the US, and the Middle East. The company supports over 100,000 active riders and 1,200 corporate clients, combining advanced technology with professional chauffeuring. With $43M in funding and annual revenue exceeding $100M, Wheely continues to grow, recently expanding into New York City. Role overview The Senior Backend Engineer, Platform, joins a team responsible for building and maintaining the foundational systems that power Wheely’s engineering organization. This group develops shared tools, manages significant migrations (such as moving away from a Ruby monolith), and works to strengthen the company’s infrastructure. The team emphasizes lightweight frameworks and clean, maintainable code, relying on practices like Test-Driven Development (TDD), Domain-Driven Design (DDD), and continuous integration and delivery. Technology stack Go (Golang) as the primary language Ruby monolith (legacy, currently being migrated away from) PostgreSQL and MongoDB for databases RabbitMQ and Redis for messaging and caching gRPC and Thrift for APIs and protocols AWS, Kubernetes, and Terraform for cloud and infrastructure Interview process Initial recruiter screening Algorithm assessments Live coding exercises Systems design discussions For senior candidates, a structured review of previous experience and achievements Wheely seeks engineers who care about their craft and want to contribute to the platform as the company continues to grow.

About Our TeamJoin our innovative AI Platform team at realtimeboardglobal, where we are at the forefront of Miro’s AI-powered product vision. We are dedicated to developing the internal platform, tools, and APIs that empower Miro’s product teams to integrate and scale AI applications seamlessly. Our mission is to create a robust and adaptable technical foundation for AI innovation, enabling our teams to work efficiently, innovate responsibly, and deliver exceptional AI features to our users.Your RoleAs a Senior Backend Engineer within our AI Platform team, you will play a pivotal role in constructing and enhancing the core infrastructure that powers AI across Miro. You will establish the technical groundwork for how we develop, deploy, and manage AI/ML capabilities, serving tens of millions of users as we transition into an increasingly intelligent product. You will design internal tools that allow teams to experiment with and release AI features swiftly and responsibly, as well as manage data pipelines for AI applications. This is a unique opportunity to influence how AI is developed and embraced company-wide.

xai seeks a Backend Engineer in London, UK to focus on API development. This role involves designing and building APIs that form the backbone of the company’s products and services. Key responsibilities Design and implement APIs to support xai’s solutions Collaborate with frontend developers and product managers to ensure seamless feature integration Optimize API performance and maintain reliability This position offers the chance to work closely with both technical and product teams, shaping the way xai’s services communicate and perform.

Equals Money has served over a million customers during its 18 years in the payments and financial operations sector. The company’s services include travel money, international transfers, card issuance, FX hedging, and expense management. In May 2025, Equals Money merged with Railsr, combining the reach and regulatory expertise of an established institution with the drive of a fintech. This merger has set the stage for a new operational model aimed at growth over the next decade. To support this direction, Equals Money is rebuilding its internal systems. Teams are working on integrated platforms, automated workflows, and AI-driven processes to improve onboarding, compliance, decision-making, and international expansion. Role overview The Developer Platform Engineer will focus on making Equals Money’s APIs easier and more effective for external developers. APIs are at the heart of how the company enables secure money movement for businesses, and improving integration is a key priority. This hands-on role centers on building and managing the developer sandbox, a production-level environment where external partners can integrate, test, and launch their solutions. What you will do Lead efforts to enhance the developer platform, from initial concept through to delivery Design and maintain the developer sandbox environment Work on API design, documentation, and developer tools Collect and incorporate feedback from external developers into engineering processes Write production-ready code and make decisions about platform features Act as a representative for Equals Money’s APIs within the external developer community Location This position is based in London or Chester, England, United Kingdom.

Join Wise as a Senior Software Engineer I, where you will play a crucial role in developing and enhancing our Acquiring Platform. As a backend engineer specializing in Java, you will collaborate with cross-functional teams to create reliable, scalable, and innovative software solutions that will help us deliver exceptional payment experiences to our users.

Join Our Team as a Backend Software Engineer!Location: LondonAbout Us:We are a cutting-edge video platform designed for live, social, and mobile streaming. Our cloud-based solution simplifies the complexities of professional video production and distribution. We collaborate with leading broadcasters and rights holders such as Sky Sports, BT Sport, Eurosport, ITV, Turner, The Premier League, LaLiga, The FA, Buzzfeed, AELTC Wimbledon, GOAL.com, and more. Our platform seamlessly integrates with major social media channels including Facebook, Instagram, Periscope, Twitter, and YouTube, and we are proud to be a preferred global partner for Facebook Live.Utilizing Amazon Web Services as our primary hosting provider, we ensure that every product within our platform is architected for scalability and high availability, catering to a global clientele. Our cloud-based infrastructure empowers engineers to remain agile, providing them with the freedom to innovate without sacrificing reliability and development speed.We believe in cultivating talent by hiring bright graduate and junior engineers, integrating them into our dynamic culture, which is vital to our growth. From day one, you will be paired with a mentor who will guide you through daily technical queries and assist in your career progression, helping you to define your focus within our platform (video, data, front-end, architecture, streaming, etc.) through regular performance evaluations.Our commitment to your happiness and engagement is paramount. We encourage pushing our platform and team to leverage the latest technologies, providing you with a diverse set of responsibilities—from design and architecture to production support. This hands-on approach allows you to feel challenged and engaged, making a tangible impact.Our strategy has fostered an ideal environment for talent retention, with several of our senior engineers, including the current Product Owner and Lead Software Architect, having started as graduate engineers and evolved into key leaders within our organization.Being social is a core aspect of our culture. We enjoy bonding as a team and organize various activities to strengthen our camaraderie.If technology excites you, you’ll feel right at home with us!As a Backend Software Engineer, you will work on essential features of our flagship product, Studio. This may include developing automated clip creation services based on data analysis, improving our media transcoding services, or enhancing our live encoding platform.You'll be working with state-of-the-art technologies including Java, JavaScript, NoSQL, Serverless Architecture, Microservices, Auto Scaling/Auto Recovery, Kinesis, and Media Processing.

Job Title: Engineer II Location: London / Bristol / Edinburgh (Hybrid options available) Salary: £45,600 - £62,700 Team: Developer Experience Reporting To: Senior Software Engineering Manager This position is based in the UK and candidates must possess the right to work in the UK. Currently, we are unable to offer visa sponsorship for this position. Our commitment to building a diverse, global team is paramount, and our sponsorship policy is assessed on a role-by-role basis. Please check back on our careers site for future opportunities that may include visa sponsorship. Kaluza is revolutionizing the energy sector with our Energy Intelligence Platform, simplifying the complexities of energy management. We assist energy companies in addressing contemporary challenges while propelling the transition to a sustainable, electrified future. Our platform facilitates millions of real-time decisions across households, devices, markets, and grids. By integrating predictive algorithms with user-centric design, Kaluza ensures that clean energy is reliable, affordable, and seamlessly integrates into daily life. With teams spread across Europe, North America, Asia, and Australia, and a joint venture with Mitsubishi Corporation in Japan, we empower leading companies such as OVO, AGL, and ENGIE, alongside innovators like Volvo and Volkswagen. Where will I be working? You will be part of the Developer Experience (DevEx) team within our expansive Kaluza Technology community. Our team comprises a diverse group of data-driven and product-oriented Software and Production Engineers who are at the forefront of technological innovation and operate at an impressive scale. Together, we pursue engineering excellence by implementing best practices throughout the community. In this role, you will be instrumental in designing and enhancing our Internal AI Engineering Platform. Your responsibilities will include creating the infrastructure—from Model Context Protocol (MCP) servers to collaborative workflows—that enables our software teams to operate more efficiently and securely. Your contributions will significantly influence Kaluza's ability to eradicate defects, enhance productivity, and set the benchmark for AI-driven development. Our tech stack is dynamic, and you may work with: AWS, Kubernetes, LLMs (Claude, GPT, etc.), MCP servers, LangChain/LangGraph, and contemporary monitoring tools.

Join a Pioneering CompanyAt Palantir, we develop cutting-edge software that revolutionizes data-driven decision-making and operations. Our platforms empower partners to create life-saving medications, foresee supply chain challenges, locate missing individuals, and much more by connecting the right data with the right people.Role OverviewAs a Backend Software Engineer at Palantir, you will engineer scalable software that reshapes how organizations leverage data. You will actively participate throughout the product lifecycle—from ideation and design to prototyping and delivering production-ready solutions. Collaborating closely with both technical and non-technical team members, you’ll identify customers' challenges and create products that effectively address them. We promote cross-team interactions to foster the sharing of skills, context, and experiences, enabling you to gain insights into various technologies and product facets. Our engineers operate independently, making impactful decisions within a supportive community that encourages growth and development into strong technical contributors and engineering leaders.Your daily responsibilities will be dynamic, adapting to user needs and technical hurdles. One day, you might partner with other engineers to design a groundbreaking system that facilitates a new workflow; the next day, you could focus on optimizing performance for low-latency operational results.Our Product Development teams consist of small, agile groups of Software Engineers, each dedicated to specific product facets. These teams collaborate to build cross-functional capabilities, enhance user workflows, and consistently improve our software’s efficiency and reliability.We are seeking engineers who are enthusiastic about tackling real-world challenges and empowering both developers and end-users to maximize their potential. If you are driven to create reliable, high-performance, and scalable systems and to design robust APIs and primitives, this role presents a unique opportunity to significantly impact our products and the communities that utilize them.Unique Opportunity: Frontline ProgramFoundry Software Engineers may be selected for the Frontline Program, a distinct opportunity to engage directly with customers. In this short-term assignment, you will work alongside users to gain invaluable insights into product application and the challenges they encounter. Unlike standard engineering roles, Frontline involves tackling complex, ambiguous problems, empowering you to deliver impactful solutions across critical industries and institutions.

Join Spotify's dynamic team as a Senior Backend Engineer focused on our innovative Commerce Platform. In this role, you will be instrumental in developing and optimizing backend solutions that drive our core commerce functionalities. Collaborate with cross-functional teams to enhance user experiences, improve system performance, and ensure robust scalability.

Over 500 million downloads. 80 million monthly users. A decade of relentless innovation – and we’re just getting started.Flo is the leading health & fitness app globally, dedicated to transforming the future of female health. With a $200 million investment led by General Atlantic, we proudly became the first app in our sector to achieve a $1 billion valuation in 2024. Our journey continues unabated.With 7 million paid subscribers and the highest-rated user experience in the App Store’s health category, we have spent the last decade building trust on a grand scale. Now, we are pioneering the next generation of digital health technologies – AI-driven, privacy-centered, and clinically validated – to empower our users to better understand their bodies.Your RoleThe Challenge AheadAt Flo, we’re more than just an app; we’re a thriving global community. As the number one women’s health app, we experienced 8.6 million new installs in the last month, along with a 2.8 million increase in active users.This extraordinary growth demands top-tier engineering talent. We are on the lookout for a Senior Developer Experience Engineer to join our Velocity team, which focuses on enhancing our internal platform. Your objective will be to create the foundational tools that empower our engineering teams to deploy code more efficiently, securely, and at a scale that most engineers rarely encounter.Your Mission: VelocityThe Velocity team aims to minimize friction in the development process. We see our internal developers as our primary customers. Your responsibilities will include:Simplifying Complexity: Craft intuitive tools that facilitate self-service, allowing developers to concentrate on core product logic.Standardizing Excellence: Integrate best practices, security, observability, and scalability into our core infrastructure, ensuring they are fundamental, not just afterthoughts.Your ResponsibilitiesEnhancing Developer Experience: Develop self-service tools that grant product teams the autonomy they need without compromising system stability.Platform Engineering: Design and advance our core technology stack (AWS, EKS, Terraform, Ansible).Systems Resilience: Spearhead reliability initiatives, encompassing business continuity planning and a sustainable on-call strategy.Privacy at Scale: Bolster the infrastructure for industry-leading privacy features, such as our TIME-recognized "Anonymous Mode." Observability: Deploy cutting-edge monitoring solutions (metrics, logs, tracing) to ensure swift identification and resolution of issues.

About 9fin9fin is revolutionizing the global debt markets with its cutting-edge AI platform, catering to the world’s largest asset class valued at over $145 trillion.The debt markets are extensive, international, and essential, yet they are often hindered by disjointed data, PDFs, and manual processes. 9fin transforms this outdated framework by providing a unified platform that consolidates proprietary credit data, in-depth analysis, and streamlined workflows across global markets.Currently, 9fin supports over 300 prestigious institutions worldwide, including leading banks, asset managers, private equity firms, law firms, and advisory companies. Our rapid growth is marked by significant expansion in the US and an exceptional retention rate driven by extensive workflow adoption.We are at a pivotal moment in our journey. With a proven product-market fit and substantial global demand, 9fin is on the path to becoming the definitive platform for debt markets globally.What You'll Work OnYou will lead technical projects, defining and designing systems, swiftly creating proof of concepts, and collaborating closely with Product and our clients.Develop code and guide your team in delivering new service functionalities, implementing APIs, managing data routing/processing, and establishing automation mechanisms.Your primary focus will be on backend services and the web applications that support the 9fin platform.Assume a leadership role within project teams, conducting code reviews and mentoring junior developers, while also participating in early research and experimentation with new technologies to inform new features and products.Continuously enhance the 9fin codebase by automating, refactoring, and documenting when possible.Diversity is key: Our web platforms encompass a wide range of areas, including complex financial data modeling, environmental and energy data capture, integration of ML/AI prediction services, and data visualization and automation systems.Collaboration is vital: We form cross-functional teams for every project, incorporating the necessary domain expertise from 9fin in finance, law, and editorial. Your ability to convey complex projects to non-technical audiences will foster productive and efficient team collaboration.Developer Experience: By managing automated processes and enhancing the development environment, you will help improve the overall experience for developers.

Your ContributionThe Senior Software Engineer III (Backend) plays a pivotal role in tackling intricate tasks and is instrumental in advancing the objectives of their team. This role includes leading small projects or components while crafting robust feature sets that adhere to high architectural quality standards.Key ResponsibilitiesAdvanced Software Development: Actively participate in the design and implementation of sophisticated software solutions, ensuring optimal functionality, scalability, testability, and reliability. Assist with system design and grooming processes.Code Quality and Optimization: Enhance and maintain code quality through thorough review practices, optimization strategies, and adherence to industry best practices.Innovative Problem Solving: Tackle complex technical challenges with creative solutions.Collaboration and Communication: Collaborate effectively within the engineering team and across various departments, working alongside other engineers, product managers, and stakeholders.Continuous Learning and Adaptation: Stay current with emerging technology trends and continuously enhance skills and knowledge.Technical Documentation: Produce and maintain comprehensive technical documentation for clarity and accessibility.

Join Our Team!At Plum, we are revolutionizing how people save and invest. Our mission is to empower individuals to grow their wealth for life, whether they are saving for their first home or enjoying retirement. Since our inception in 2016, over 2 million users across 10 European countries have saved more than £2 billion with our innovative automation and AI technology. We've been recognized with awards from esteemed organizations like Deloitte and Finder, reflecting our commitment to excellence.We are a passionate team of over 200 Plumsters working collaboratively across Europe, and we are eager to welcome more talented individuals to help us achieve our vision.Your RoleAs a Senior Backend Engineer at Plum, you will play a crucial role in shaping our technology and product offerings. We seek engineers who are not only technically adept but also understand the importance of delivering outstanding products to our customers.