Backend Developer Jobs in Thuringia, Germany

YOUKI Backend Team builds an international platform at the intersection of cleantech, blockchain and fintech to help achieve climate targets. The Backend Developer designs and implements containerized microservice applications using JavaScript/Nest and Java/Spring, mentors junior developers, and may lead solution architecture with blockchain components.

Backend Engineering at Bjak builds the core systems behind the AI Neobank app. The role designs and implements reliable APIs, workflows and financial product infrastructure that scale across markets and millions of users, collaborating with product, frontend, mobile and AI teams.

Turnblock.io backend team builds modular services for a tokenization platform. The Backend Developer (NodeJS) designs, implements, and maintains NodeJS/Express APIs, integrates third‑party RESTful services, and collaborates with frontend and blockchain engineers to deliver scalable products.

Backend Developer Java at Custom Software Solutions, part of Sopra Steria's #OneTeams, develops tailored software solutions for modernization, agile transformation, and smart collaboration. You focus on backend development with Java, analyze and optimize challenging applications, advise customers at eye level, and apply AI tools to support innovative, sustainable client solutions.

As a Kotlin Backend Developer at Devoteam, you will work within an agile team focused on API-first applications, managing the entire software lifecycle from requirements engineering through implementation to Go-Live and support. You will design scalable and resilient backend architectures based on REST with a focus on high availability and performance, translate business requirements into technical solutions, and integrate and model databases while driving the automation of operational backend p

As a Kotlin Backend Developer at Devoteam, you will work within an agile team focused on API-first applications, managing the entire software lifecycle from requirements engineering through implementation to Go-Live and support. You will design scalable and resilient backend architectures based on REST with a focus on high availability and performance, translate business requirements into technical solutions, and integrate and model databases while driving the automation of operational backend p

Sopra Steria, a leading European management and technology consultancy, seeks an AI Backend Developer to build robust backend components for data-intensive AI applications. Day-to-day work includes designing API architectures, integrating AI models, optimizing graph database solutions (e.g., Neo4j), and developing data and analysis workflows.

Optiplay is hiring a Middle+/Senior Backend Developer to design and maintain external integrations with casino operators and partner platforms, with about 70% of the role focused on integration work and 30% on general backend and platform system design. Day-to-day work includes building resilient integration layers, contributing to core services and APIs, participating in slot game logic development, defining integration testing practices, and collaborating with Game Logic, Product, and DevOps t

R&D Team at Outdooractive develops the technical foundation of the Outdooractive platform, ensuring performance, scalability and stability. The Backend Developer designs, implements and maintains Java EE web applications, conducts code reviews, automates tests and optimizes server infrastructure for API partners.

Backend Team at Genki builds the core system powering its health insurance platform for long‑term travelers. The role designs and implements new Kotlin features, improves testability and reliability, and evolves the event‑sourced architecture while collaborating with the Lead Backend Developer.

Secure Software Engineering research department at Fraunhofer SIT develops innovative security analysis tools. The student assistant will extend the backend of these tools using Java, implementing new vulnerability scanner functionalities within an agile development process.

Sopra Steria's Custom Software Solutions team seeks a Backend Developer with an AI focus to design and optimize custom software for clients across Germany. The role involves integrating AI applications into existing systems using Python and Java while advising customers on technical solutions.

Engineering Team at payabl. builds scalable, high‑performance backend services for fintech and payments platforms. The Senior Backend Python Developer designs and implements Python microservices, integrates third‑party APIs, and drives performance improvements using AWS, Docker, and CI/CD pipelines.

Secure Software Engineering research department at Fraunhofer SIT builds modern fuzzing infrastructure to detect software vulnerabilities. As a Student Assistant you will run existing fuzzers on popular x86 applications, extend them with cutting‑edge techniques, and maintain an exploit database.

Daran werden Sie wachsen: Entwicklung und Weiterentwicklung moderner Backend- und Cloud-Lösungen Konzeption skalierbarer Software- und Datenarchitekturen sowie technische Verantwortung für anspruchsvolle Kundenprojekte Integration moderner KI-Technologien und datengetriebener Funktionen in produktive Softwarelösungen Analyse fachlicher Anforderungen und Ableitung nachhaltiger technischer Lösungen gemeinsam mit Kunden und Fachbereichen Etablierung moderner DevOps-Praktiken sowie Begleitung des ge

Du entwickelst Softwarelösungen, insbesondere mit Python und Java, und bringst gerne deine eigenen Ideen aktiv ein In Kundenprojekten integrierst du eigenständig AI-Anwendungen in bestehende Systeme Die Analyse und Optimierung anspruchsvoller Applikationen werden von dir analysiert und kontinuierlich optimiert Gemeinsam mit deinem Team gestaltest du innovative Anwendungen Als kompetente Ansprechperson berätst du unsere Kunden auf Augenhöhe und gestaltest die Projekte mit Du entwickelst dich in d

Nebius, a leading AI cloud infrastructure provider, seeks a Senior Backend Engineer to build fault‑tolerant services on its hyperscaling platform. The role focuses on Golang, with exposure to Java and Python, and involves designing cloud infrastructure, managed databases, Kubernetes, billing, monitoring, and ML services.

Java Backend Engineer on the osapiens Hub team, building the core of the AI‑driven osapiens HUB platform that powers sustainable growth for global enterprises. The role designs and implements scalable Java backend services, owns features from concept to delivery, and mentors junior engineers in an agile environment.

Grafana Alerting squad builds the core alerting platform for Grafana Cloud and on‑premise deployments, enabling users to manage and scale alerts across diverse environments. The Staff Backend Engineer will design, build, and operate distributed systems for alert ingestion, evaluation, and delivery, mentor teammates, and contribute to open‑source initiatives.

Aurora Engineering team builds the Lifestyle Operating System that powers AI‑driven personalization for high‑performing individuals. The Senior Backend Engineer designs and implements Python/Django APIs, background processing, agent orchestration and LLM‑integrated data pipelines, collaborating with product, curators and frontend/mobile engineers.