20 backend developer English-speaking jobs in Cologne

RESTful APIs for system and frontend integration, contributing to the conception and implementation of backend

YOUR ROLE Backend clean integration with the AI/ML pipeline. ... handling Test strategy: experience building testing practices systematically within a team Background in developer ... You spend most of your time on the backend – building AI-integrated services, async pipelines, and the

We're looking for an experienced UI developer to join our motivated IT team.

Strong Python or Node.js backend engineering expertise. ... Remain hands-on across critical backend services, APIs and AI orchestration. ... are looking for a hands-on Technical Team Lead to lead and develop a small, highly skilled team of backend ... combine technical leadership with people development while shaping production-grade agentic AI systems, backend

What You'll Do Design, develop, test, and maintain production-grade backend software in Java Work through ... Take ownership of features from implementation through production What We're Looking For 5+ years of backend

the foundation of the Flutter mobile application, defining robust architecture patterns, optimizing developer ... ongoing professional growth. * Engage in cross-departmental collaboration with product, design, and backend

Backend & Scale: Help design robust APIs and data pipelines in our backend stack (we mainly use Java ... When a critical system goes down, our platform is the "source of truth" — from the resilient backend ... Tasks Ship End-to-End Features: Build user-facing features with React and TypeScript, the backend APIs ... Whether you lean frontend, backend, or full-stack, you'll ship production code that powers a mission-critical ... Hands-on experience with at least one part of our stack — React/TypeScript on the frontend and/or a backend

Development team, you will operate with a high degree of autonomy while collaborating closely with backend

Strong technical depth, ideally with a Java/backend background, and experience with distributed systems

Participate in knowledge transfer across the team What we expect from you Experience working as a frontend developer

Must-have Strong software engineering skills, especially in Python or a comparable backend language ... sense for quality, speed, cost, or control Debug AI feature failures across inputs, outputs, data, backend ... Remote work Fair compensation based on skills, experience, and location Ownership of important backend ... tests, and quality checks for AI-generated outputs Integrate AI capabilities into existing product and backend

Must-have Strong software engineering skills, especially in Python or a comparable backend language ... sense for quality, speed, cost, or control Debug AI feature failures across inputs, outputs, data, backend ... Remote work Fair compensation based on skills, experience, and location Ownership of important backend ... tests, and quality checks for AI-generated outputs Integrate AI capabilities into existing product and backend

Must-have Strong software engineering skills, especially in Python or a comparable backend language ... sense for quality, speed, cost, or control Debug AI feature failures across inputs, outputs, data, backend ... Remote work Fair compensation based on skills, experience, and location Ownership of important backend ... tests, and quality checks for AI-generated outputs Integrate AI capabilities into existing product and backend

Full-Stack Confidence: You’re comfortable working on both frontend and backend projects, taking ownership

If you admire the functional elegance of Linear, the data-depth of Datadog, and the developer-centricity ... Experienced: 3+ years in Product Design, with a portfolio demonstrating complex B2B SaaS or Developer

. • Strong backend engineering background in distributed systems — microservices, async processing, resilient

here affects all of them Enable the L1 network and be their technical point of contact: write the developer ... artefacts (tools, skills, agents, integrations) each shipped with a user guide for AI Champions and a developer

The role combines applied LLM engineering with solid backend engineering in TypeScript.

The role combines applied LLM engineering with solid backend engineering in TypeScript.

Broad Technical Skillset: You move between data pipelines, backend and some frontend, and are not afraid