Senior Backend Engineer

Join Proton and build a better internet where privacy is the default At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to

CarCutter is seeking a Senior Backend Engineer to power the core image processing platform. You will design, build, and operate Python services, connect to SQL databases and queues, and optimize AWS infrastructure.You will collaborate across product, design, and AI teams to modernize architecture and enable agent-assisted workflows. You will work in a hybrid...

Voodoo in Paris is seeking a Senior Backend Engineer to shape architecture, scalability, and long‑term strategy for Wizz, a social app with millions of users in the US and UK. You will own backend systems and collaborate with product and engineering teams to deliver a robust platform.You will work with a stack including Node.js, Go, MongoDB, Redis, and...

A financial technology company is seeking a Senior Software Engineer to build and scale core backend services. The role involves designing APIs and microservices while ensuring performance and security. Candidates should have 8+ years in backend engineering, be proficient in TypeScript, and have experience with databases and AWS. This position offers...

Swan is seeking a Software Engineer to join its tech team of 70+ for a multi-month project. The engineering team spans software developers, infrastructure, devops, QA and security, with a focus on a reactive architecture.You will collaborate with the product team to design the bank-by-API, optimize backend performance, and ensure adherence to architecture...

Vocca in Paris is hiring a senior backend engineer to own the core platform built with TypeScript/Node.js. You will unify the booking layer across multiple software vendors and ensure reliable operation for millions of calls.We value strong backend design, experience with clinic integrations, and the ability to shape architecture and squad workflows in a...

EngineersOfAI is seeking a Senior Backend Engineer for the Dashboard Platform team in Paris. This role focuses on infrastructure automation to empower developers at Algolia to better serve customers. Key responsibilities include contributing to operation and deployment, taking ownership of developer experiences, and sharing best practices.The ideal candidate...

IQGeo UK Limited is seeking a Senior Backend Engineer to join our AI team in Paris. You will design, build, and evolve backend services and APIs powering real-time computer vision for millions of images annually.You’ll own the end-to-end lifecycle from architecture to deployment, collaborating with DevOps to ensure scalable, reliable production systems....

Swan is seeking a Freelance Software Engineer to join the Banking Experience team. You will own technically one or more projects, work with product to design bank-by-API solutions, and optimize systems under high load in a regulated environment.The role emphasizes ownership, code quality, automated testing, CI/CD, and collaboration with a distributed,...