Native Kotlin and Jetpack Compose development on a consumer-facing Android app for in-store grocery trips, running on a known device inside live stores. Integrates on-device edge AI (ML Kit, TensorFlow Lite) and uses AI coding tools like Cursor or Claude Code. Reports to the Head of Android.

You will build production mobile apps for iOS and Android using React Native, TypeScript, and integrate AI, natural-language features, Swift, Kotlin, and Python. The venture-backed startup creates AI-powered software that replaces manual workflows for industrial and operational teams.

You will own an existing production React/TypeScript application across web, iOS, and Android, integrating with Python/FastAPI backends and managing CI/CD pipelines. The team builds a computer-vision platform that turns video data into actionable insights. You will drive frontend architecture on a small, collaborative engineering team.

Foundation Partners Group★2.6 (165)· London

Typescript, Python, full-stack web development, frontend focus, offline support, observability, and testing across devices. You will build and scale consumer-facing production web applications for Flok Health, an AI-native healthcare company transforming care for MSK pain.

Senior Software Engineer role at Everfox, working with modern C++ on cross-platform desktop (Linux, Windows) and mobile (Android, iOS) apps, plus Java/Kotlin, Swift/Objective-C, Qt, GitLab, Docker, Kubernetes, and Python. You will build and maintain the end-point software layer for the Hardsec product line’s secure browsing and VDI solution, owning design, development, and delivery. You will also coordinate a small team of engineers and manage release planning across multi-platform shipped products.

Smarkets★5.0 (2)· London

Build web and mobile apps with Next.js, React, React Native, TypeScript, Redux, React Query, WebSockets, and REST APIs, using Figma for design and GitLab with Kubernetes for DevOps. You will craft polished interfaces for Smarkets, which operates one of the world’s most sophisticated prediction markets for sports and political events.

Depop★4.4 (61)· London

This Senior Backend Engineer role uses Scala (primary), TypeScript, Python, Play Framework, Kubernetes, PostgreSQL, DynamoDB, and Kafka. The Shipping Experience team builds and evolves the end-to-end shipping journey for buyers and sellers on Depop’s peer-to-peer circular fashion marketplace.

Build production-grade cross-platform apps with React Native, TypeScript, and native modules (Swift/Kotlin). You'll design offline-first mobile workflows with AI integration (LLMs, agents) and build backend services (Python a plus). The team is removing manual barriers in industries like aerospace, healthcare, and energy.

Deliveroo★3.3 (1.5k)· London

Lead a full-stack team (~7–8 engineers) building the real-time, back-office workspace used by 30,000+ support agents across Deliveroo, DoorDash and Wolt. The stack includes Go, Python or Node.js (backend), React (frontend), with cloud tooling (Kubernetes, AWS, Datadog) and an in-house chat platform handling tens of millions of conversations monthly.

Deliveroo★3.3 (1.5k)· London

Work with R/Python, SQL, and Cursor/AI tools to design experiments including A/B tests and causal inference. As a Senior Data Scientist on Deliveroo’s three-sided marketplace, you drive high-quality decision-making across product, operations, and platform teams.

Works with SAST, DAST, SCA, Burp Suite, OWASP ZAP, Semgrep, Python, Java, Kotlin, Go, JavaScript, and CI/CD pipelines (GitHub Actions

Proton★5.0 (1)· London

Engineering Directors at Proton set technical direction and work with PHP (Symfony), Rust, Python, Swift, Kotlin, Jetpack, Typescript, React, C#, SQL, Redis, MySQL, and Ceph across mobile, desktop, web, and backend platforms. They lead engineering for one of Proton’s existing or upcoming products—such as Proton Mail, VPN, Calendar, Drive, or Pass—which provide private, secure, open-source tools to over 100 million users. The role involves managing a team of managers and driving DevSecOps practices.

Ebury★3.3 (13)· London

You will work with React Native, React, TypeScript, Python, PostgreSQL, Redis, Expo pipelines, AWS, and Git. You join Ebury’s Mobile Platform team to evolve the mobile app by building features, services, and frameworks that empower product teams to ship efficiently while maintaining a unified customer experience.

You'll build production Android apps in Kotlin, integrating AI-powered features like LLM chat, vision, and voice through backend APIs while optimizing performance and reliability for mobile devices. BJAK is developing a proactive AI smart assistant for everyday users focused on multi-step workflows, persistent context, and real-world task completion. The role requires 3+ years Android experience with hands-on AI feature integration and strong async programming skills.

You'll build production iOS applications in Swift and SwiftUI for A1, an AI smart assistant handling everyday tasks, conversations, and workflows. The role centers on AI integration through backend APIs, designing UX patterns for streaming responses and AI interactions, optimizing performance and battery efficiency, and collaborating with backend and ML engineers on system reliability. You need 3+ years iOS development experience, proven AI feature integration, async/await expertise, and production app shipping skills.

Depop★4.4 (61)· London

Depop seeks a Backend Software Engineer for its Search Retrieval team working with Python or Scala, AWS, and modern cloud infrastructure. You'll collaborate with product managers, data scientists, and mobile/web engineers to build search and information retrieval systems serving 1M+ daily active users on Depop's peer-to-peer secondhand fashion marketplace.

Rightmove★3.7 (31)· London

You'll manage a team delivering secure, scalable cloud platforms and infrastructure supporting hundreds of engineers across mission-critical services at Rightmove, the UK's largest property portal. The role blends cloud operations, platform engineering, security governance, automation, and FinOps, requiring hands-on experience with GKE, Kubernetes, Terraform, service mesh, Kafka, Elasticsearch, IAC, Python, Go, and CI/CD pipelines. You'll lead strategy and execution while mentoring engineers, ensuring reliability, managing cloud costs, implementing governance frameworks, and embedding security controls across the platform.

SumUp★3.4 (84)· London

You'll build and maintain backend services for SumUp's neobanking platform using Go, Docker, and Kubernetes, handling critical infrastructure like bank transfers, open banking integrations, and payment processing. The role involves end-to-end ownership of features across a fintech company serving 4 million small businesses globally, requiring strong experience with cloud platforms, SQL/NoSQL databases, and distributed systems in regulated environments.

SumUp★3.4 (84)· London

You'll lead a cross-functional backend, iOS, and Android engineering team building SumUp Consumer, a banking and payments platform for merchants and consumers. The role requires hands-on technical contribution with Go, Kotlin, Python, or similar languages in cloud-native environments (AWS, Docker, Kubernetes), plus 2+ years of proven engineering management experience growing high-performing teams. You'll partner with Product and Design to deliver reliable, scalable features while balancing execution speed with quality.

Deliveroo★3.3 (1.5k)· London

You'll work with Go, Ruby/Rails, Python, Scala, or Rust alongside PostgreSQL, Redis, DynamicDB, and ElasticSearch to build Deliveroo's food delivery marketplace serving millions at scale. You'll improve code architecture, lead technical projects, conduct interviews, mentor engineers, and collaborate across teams while solving logistical problems in a three-sided marketplace.

Deliveroo★3.3 (1.5k)· London

You'll lead multiple analytics engineering teams across Deliveroo's three-sided marketplace using SQL, cloud data warehousing, transformation tools, and data modeling—owning pipelines, metrics, and data products that power business decisions at scale. Managing multiple Analytics Engineering Managers and their teams, you'll shape the organization's technical roadmap, tooling standards, and data products mindset while developing people managers and influencing director-level stakeholders on analytics investments.

Deliveroo★3.3 (1.5k)· London

You'll design and build production-grade machine learning systems for Deliveroo's search and recommendations platform using Python, PyTorch or TensorFlow, working with recommendation systems, NLP, ranking algorithms, and generative AI. The New Verticals Personalisation team powers customer discovery across grocery, convenience, and retail delivery categories within DoorDash's three-sided marketplace. You'll provide technical leadership across multiple product areas, mentor junior engineers, and help shape product strategy alongside engineering and product leaders.

Deliveroo★3.3 (1.5k)· London

You'll own the full ML lifecycle for Deliveroo's customer support and decision systems, working with Python, Docker, Kubernetes, and CircleCI to build, deploy, and monitor production models including LLM-powered automation and agentic AI projects. The Care team tackles high-impact problems in customer experience and trust within a three-sided food delivery marketplace serving millions globally.

Deliveroo★3.3 (1.5k)· London

You'll design, build and operate event streaming infrastructure using Kafka, EventBus and related technologies that power critical business workflows across Deliveroo, DoorDash and Wolt. You'll need strong production experience with distributed systems, hands-on coding in Java, Go or Python, and expertise in infrastructure automation, observability and operational excellence. The role involves debugging complex systems issues, improving platform reliability and scaling, and partnering across Storage, SRE, Data Platform and Core Infrastructure teams.

Deliveroo★3.3 (1.5k)· London

You'll lead a team of Analytics Engineers working with SQL, cloud data warehousing, transformation tooling, and data modelling across a defined business domain at Deliveroo, a three-sided marketplace for food delivery and shopping. You'll own data pipelines, models, and metrics powering decision-making, drive data products practices, and contribute to analytics standards across the organization. The role manages a team of IC Analytics Engineers, with responsibility for their performance, development, and technical roadmap delivery.