Tech jobs

Développeur Web Full Stack – CDI – Paris 2ème

AWS Azure Blockchain Cloud Elixir +4 skills

Build and maintain the full-stack web platform for a blockchain-based luxury goods traceability service using Elixir/Phoenix, Ruby on Rails, and cloud infrastructure.

Kicklox

Développeur Full-Stack (Ruby) H/F

API CSS E-commerce HTML JavaScript +7 skills

Build and maintain full-stack web apps using Ruby on Rails, JavaScript, and SQL/NoSQL databases, collaborating with designers and writing tests to deliver performant, user-friendly solutions.

55K – 65K €

Université de Reims Champagne-Ardenne

Développeur Full Stack

Angular CI/CD C# Data Science Deep Learning +6 skills

Build and maintain full-stack web apps for a health-AI research institute, migrating from Ruby on Rails to ASP.NET C# and using Vue.js/TypeScript on the front end.

Université de Reims Champagne Ardenne

Développeur Full Stack Backend - Rails vers ASP.NET

C# .NET Rails Ruby TypeScript +1 skills

Build and maintain web apps, migrating a Ruby on Rails backend to ASP.NET C# and developing Vue.js/TypeScript frontends for a health-focused AI institute.

Capitaine Train

Ingénieur Backend API — Architecte d’API Rails

Université de Reims Champagne-Ardenne

Build and maintain high-quality backend APIs using Ruby on Rails for a fast-growing travel-tech company.

API Rails Ruby

Développeur Full Stack Backend Expert – Santé IA

Angular C# .NET Rails React +2 skills

Builds and maintains secure, high-performance web apps for digital health and clinical research, primarily using Ruby on Rails or C#/ASP.NET with a front-end framework like Vue.js or React.

Capsens

Développeur/se confirmé Backend Ruby on Rails

AWS Claude Code Fintech GitHub PostgreSQL +6 skills

Build and maintain Ruby on Rails backends for fintech platforms handling hundreds of millions in transactions, collaborating with product teams and using AI tools like Claude Code.

Prium Partners

Développeur Senior Ruby on Rails – Web & Frontend Performant

Open 26d EuropeSenior

Senior Ruby on Rails developer building performant web and frontend solutions using Ruby, Rails, HTML, and CSS in a Paris-based product team.

CSS HTML Rails Ruby

GlobalLogic

Agentic AI Agile AI API Atlassian +26 skills

Sr Front-End Developer (React) – Advanced English Level IRC298611

Open 26d LATAMSenior

Argentina

Builds React/Next.js front-ends for a U.S. fintech client’s digital transformation, integrating APIs and AI services to deliver dynamic, real-time user experiences.

Poppe + Potthoff GmbH

AI Analytics Azure Cloud Data Science +11 skills

Junior Data Engineer (m/w/d)

Open 26d EuropeJunior

Germany

Build and maintain data pipelines, ETL/ELT processes, and data models for a manufacturing company, integrating production and enterprise data sources to support analytics and automation.

45K – 55K €

GitLab

Open 26d UKSenior H-1B sponsor history

Senior Backend Engineer, AI Chat Engine

AI GitLab LLM Python Rails

Senior Backend Engineer builds core AI capabilities for GitLab Duo Chat, integrating large language models and orchestrating multi-agent flows across the GitLab platform.

BigCommerce Pty.

Payments Backend Engineer (Ruby/PHP/Scala) – Hybrid London

Open 26d HybridUK

Build and maintain scalable payment integrations using Ruby on Rails, PHP, or Scala to support BigCommerce’s ecommerce platform.

Rails Ruby

Transreport

Open 26d UKSenior Licensed UK sponsor

Architect & Ship Greenfield React Native B2B Mobile

Android CI/CD iOS Rails React +2 skills

Build and own a new React Native B2B mobile app from scratch, collaborating with Ruby on Rails backend engineers to define architecture, testing, and CI/CD pipelines.

Raylo

Backend Engineer (Ruby on Rails) — Growth, Hybrid, Stock Options

Open 26d HybridUKMiddle

Mid-level backend engineer building customer decisioning and third-party integrations in Ruby on Rails, collaborating with product and frontend teams in a hybrid setup.

Rails Ruby

GitLab

Open 26d UKFull-time H-1B sponsor history

Intermediate Backend Engineer (RoR), Security Risk Management: Platform Management

AI API CI/CD DevSecOps Elasticsearch +10 skills

Builds backend services in Ruby on Rails to power GitLab’s AI-driven DevSecOps security platform, focusing on enterprise security posture management and scalable APIs.

75K – 100K $

BigCommerce Pty

Backend Engineer (Ruby/PHP/Scala) – Hybrid London

Open 26d UK

Builds and maintains payment integrations for an ecommerce platform using Ruby on Rails, PHP, or Scala.

Rails Ruby

hackajob

Senior Backend Engineer, Payments Platform (Kotlin/Java)

Open 26d UKSenior

API AWS Java Kafka Kotlin +4 skills

Builds and maintains high-scale payment rails in Java/Kotlin with Spring Boot, designing RESTful APIs for Wise’s global customer base.

Fynity

Senior Ruby on Rails Backend Engineer for Scalable Ops

Open 26d UKSenior

Senior Ruby on Rails engineer building and scaling backend systems for live production environments, optimizing databases and integrations to ensure reliability.

Observability Rails Ruby

Transreport

Open 26d UKSenior Licensed UK sponsor

Senior Mobile Engineer (React Native)