Backend Developer Jobs in Île-de-France, France

Apps team at EPI builds a pan‑European payment platform that enables seamless, instant transactions across the continent. As a Backend Engineer you will design, implement and operate cloud‑native microservices in Kotlin, ensuring high performance and reliability for mobile and web clients.

Apps team at EPI builds a pan‑European payment platform enabling instant, secure transactions across the continent. As a Backend Engineer you will design, implement and operate cloud‑native microservices, own API development, and ensure scalability and performance for mobile and web clients.

Pennylane Engineering builds a scalable financial operating system for European SMEs. As a Backend Engineer you will design and implement Ruby on Rails services, collaborate with product and design to deliver end‑to‑end features, and ensure reliability in production.

Backend Engineering team at Trade Republic builds scalable backend services for Europe’s largest savings platform. The role designs high‑availability cloud services on AWS, develops Kotlin‑based microservices with Spring and Vert.x, and implements CI/CD pipelines using GitHub Actions and Kubernetes.

Growth Studio (Engineering) at Proton builds the marketing technology stack that powers user acquisition and engagement. The Backend Engineer designs and implements key components of the MarTech platform using Python and PHP, collaborates with cross‑functional stakeholders, and ensures security and scalability.

Navigation team at Veepee builds the storefront experience for flash‑sale e‑commerce. The Backend Developer designs and implements APIs, background workers, and event‑driven services that power the site and mobile apps.

Slash Team at Riot Security builds email security that reads attackers’ emails like humans. The Backend Engineer designs detection logic, in‑email alerts, and admin tooling, shipping features end‑to‑end while shaping backend standards.

Backend Engineer on Riot Security’s Awareness Team, building chat‑based cybersecurity courses that millions of employees actually engage with. The role ships end‑to‑end features, builds robust systems for millions of learners, and shapes backend standards while leveraging AI tooling daily.

Nabla’s AI‑driven healthcare platform needs a Backend Engineer to design, build, and evolve server‑side applications and APIs that power real‑time clinical workflows. The role focuses on scaling backend systems, integrating with EHRs, and shaping technical strategy for high‑availability services.

Post Sales team at Veepee builds the product that lets members manage personal data, track orders, and raise support queries. The Backend Developer designs and refactors APIs, ensures scalability, reviews code, and mentors junior developers.

Air Apps’ Backend Engineering team builds AI‑powered resource planning services. The role designs and implements RESTful/GraphQL APIs, microservices, and cloud infrastructure on GCP, ensuring secure, scalable, and reliable backend systems.

Backend Engineer on Adaptive ML’s product team building high‑availability PostgreSQL and ClickHouse pipelines for generative AI products. Own data layer architecture, develop Rust software, design schema evolution, and ensure reliability at scale.

Backend Developer Python at Octopus Energy in Paris. Build scalable backend services for green energy platform, focusing on onboarding funnel and client dashboard.

Adaptive ML builds foundational generative AI tech, enabling models to learn from user interactions. As a Backend Engineer on the Product Team, you’ll design, iterate, and implement high‑performance Rust back‑ends, manage GPU workloads, and create scalable abstractions.

Join Prelude as a Backend Engineer to build and scale a distributed authentication platform. You’ll work on the Dashboard and API, designing AWS-based services in Go, improving performance, and deploying fraud prevention models.

Software engineer for Brandsplace team at Veepee. Develop and redesign product features, propose interfaces, maintain clean code, review designs, ensure reliability and scalability, meet deadlines, review legacy code, write docs, conduct technical interviews.

Extensions team builds AI-driven backend services that power enterprise applications. The Backend Engineer designs, develops, and maintains high‑performance distributed workflows, collaborates with data scientists to translate prediction use cases into scalable services, and ensures reliability and observability in production.

Security & IT – IT team builds a high‑scale, real‑time digital platform serving millions of active users daily. The Backend Engineer designs and builds robust microservices, ensures scalability, reliability and maintainability, and supports 24/7 system stability.

Backend team at Terabase Energy in Paris builds and maintains the backend infrastructure for Construct, a B2B SaaS platform for utility‑scale solar construction. The role designs, develops, tests, and deploys backend services, collaborates daily with mobile, front‑end, AI, and external development teams, and applies Agile principles to deliver high‑quality code.

Backend Experience team – Innovate squad builds high‑risk backend experiments to validate bold product bets for Yubo’s social discovery platform. The role designs, ships, and operates resilient, scalable services, defines success metrics, and iterates quickly based on experiment outcomes.