java freelancer

About The Role What if the code you write could directly shape how the next generation of AI understands and generates software? We're looking for Software Engineers in Frankfurt to build, evaluate, and improve AI-generated code — helping train AI systems to think like real developers. You'll write solutions, review AI outputs, and provide the...

About The Role What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products — from data pipelines and model-serving infrastructure to scalable microservices...

About The Role What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers in Leipzig and across Germany to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products — from data pipelines and model-serving infrastructure...

Company DescriptionBlackbird Collective is an HR organization that helps startups and established companies find employees that match their current needs. We work on freelance and interim recruitment projects for clients based in Germany, most of which are located in Berlin.Job DescriptionAt the moment, we are collaborating with a few innovative startups...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a SWE Infrastructure Specialist (Java) – Freelance AI Trainer Project based in Germany. This role offers experienced Java engineers the opportunity to apply their infrastructure expertise to the advancement of next-generation AI...

Senior Software Engineer — Agentic Coding (AI Training) About The Role What if your software engineering expertise could define how the next generation of AI writes, debugs, and ships code on its own? We're looking for Senior Software Engineers in Berlin to work at the frontier of agentic AI — building, evaluating, and improving autonomous coding...

We're not looking for someone who has "used CoPilot." We're looking for a Senior Java Backend & DevOps Engineer who already runs agentic workflows as a core part of how they ship – multiple Claude Code / Codex / Cursor agents in parallel, custom subagents, MCP servers, skills, planning loops, review gates – and who has opinions about which patterns...

Du bist Senior Fullstack Developer und willst mehr als Tickets abarbeiten? Du möchtest technisch hands-on bleiben, ein kleines Entwicklungsteam fachlich weiterbringen und moderne Softwareentwicklung aktiv mitgestalten? Für ein agiles Entwicklungsteam im Raum Wiesbaden suchen wir eine:n Senior Fullstack Developer:in mit Schwerpunkt **Java, Spring Boot und...

371-AB: Senior Java Backend Developer (Spring Boot, API, Cloud Native, DevOps) (m/f/d) 40 Stunden pro Woche • befristet • Frühester Beginn ab sofort 371-AB: Senior Java Backend Developer (Spring Boot, API, Cloud Native, DevOps) (m/f/d) Projektstart: August 2026Projektende: Dezember 2027, Option auf VerlängerungWir suchen einen Senior DevOps...

Your Responsibilities An external freelance lecturer for “Frontend Programming” (m, f, d)(Digital Business and Data Science, B.Sc.) in Hamburg, GermanyThe teaching load comprises 3 SWS (teaching units with each unit being 45 min.).The opportunity:To become an adjunct lecturer at a university of applied sciences in Hamburg, Germany and to share your...

Your Responsibilities An external freelance lecturer for “Frontend Programming” (m, f, d)(Digital Business and Data Science, B.Sc.) in Hamburg, GermanyThe teaching load comprises 3 SWS (teaching units with each unit being 45 min.).The opportunity:To become an adjunct lecturer at a university of applied sciences in Hamburg, Germany and to share your...

Germany Python Developer Jun 02, 2026 Coder Salary Editorial Team Tech salary analysis & career insights Complete Python Bootcamp Learn Python programming for automation, web development and data projects. View Course The German Tech Market and the Python Developer Demand for Python developers in Germany has been climbing for years, and the language...

Wir sind ein Unternehmen im schönen Preetz im Norden - in der Nähe von Kiel in der Natur gelegen.Ich habe dieses Unternehmen vor einigen Jahren als Freelancer noch aus Karlsruhe aufgebaut. Mittlerweile sind wir für KMU und auch im Konzernbereich tätig und verfügen über ein weitgehendes Aufgabenspektrum von IT-Consulting bis zur...

Liebe Fullstack Entwickler,   für eine der führenden Digital-Agenturen Deutschlands suchen wir ab sofort mehrere Fullstack Entwickler. 100% Remote mit langfristigem Vertrag.   QUICK FACTS:- Freiberuflich/Freelance- Start: ASAP- 100% Remote- Dauer: langfristig, Verlängerung möglich- Kapazität: Vollzeit oder Teilzeit, beides möglich- Sprache: Deutsch...

Modellierung und Entwurf von E/E-Netzwerken für die Motorelektronik aus RRPS Beschreibung - Modellierung und Entwurf von E/E-Netzwerken für die Motorelektronik aus RRPS - PREEvision Customizing für RRPS-spezifische E/E HW/SW/SYS-Entwicklung \(non Autosar\) - Unterstützung der E/E System Engineers bei der Übergabe der As-Built-Dokumentation an...

Dear AEM Developers,   For one of the leading tech companies in the US (global reach), we are currently looking for multiple AEM Architects. 100% remote and long-term.   QUICK FACTS:- Freelance/Contract- Start: ASAP- 100% remote- Duration: Long-term (12+ months)- Capacity: Full-time, part-time also possible- Language: English- UK business...

Liebe AI Platform Engineers,   für eine der führenden Digital-Agenturen Deutschlands suchen wir ab sofort mehrere AI Platform Engineers. 100% Remote mit langfristigem Vertrag.   QUICK FACTS:- Freiberuflich/Freelance- Start: ASAP- 100% Remote- Dauer: langfristig, Verlängerung möglich- Kapazität: Vollzeit oder Teilzeit, beides möglich- Sprache:...

We’re looking for a backend engineer who thrives in fast-moving environments and enjoys building robust systems end-to-end. You’ll work across data pipelines, APIs and infrastructure, ensuring our platform runs efficiently and scales cleanly as we grow. Your role Develop and maintain backend features and APIs for our core platform Improve database...

Key job characteristics: Location: BerlinType: Full time, hybrid/on-siteLanguages: German (min.B2) and English Dear Applicants, for our client - public sector company - we are looking for a skilled Mobile Developers (specialized in both iOS or/and Android). On this position, you will play a crucial role in enhancing the digital services provided by our...