Backend Developer Jobs in Thuringia, Germany

Devoteam Consulting, a KI‑basierte Technologieberatung, delivers end‑to‑end cloud and data solutions for enterprise clients. As a Kotlin Backend Developer you will design and implement scalable REST‑API services, build resilient backend architectures, automate operational processes and mentor teammates on technical challenges.

Sopra Steria’s AI Backend team builds robust backend components for data‑intensive AI applications, designing API architecture, integrating models, and optimizing Neo4j graph‑database solutions. The role involves creating RESTful APIs, developing inference pipelines, and collaborating on AI portfolio prototyping and delivery.

Devoteam Germany, a KI-based technology consulting firm specializing in Cloud, Cybersecurity, Data, and AI, seeks a Kotlin Backend Developer to join its Frankfurt team. You will own the full software lifecycle of API-first applications in an agile setting—from requirements engineering through implementation to go-live and support—while designing scalable, resilient REST-based backend architectures.

Devoteam Germany is a KI-based technology consultancy specializing in cloud platforms, cybersecurity, data, and AI, supporting digital transformation for over 2,000 customers in Germany. As a Kotlin Backend Developer, you will own the full software lifecycle of API-first applications in agile teams—from requirements engineering through implementation to go-live and support—while designing scalable, resilient REST-based backend architectures.

Devoteam, a KI-based technology consultancy, seeks a Kotlin Backend Developer to drive end‑to‑end API‑first software delivery within its agile teams. The role designs scalable REST backend architectures, implements high‑performance services, automates operations, and mentors peers on technical challenges.

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.

Devoteam Consulting, a KI‑basierte Technologieberatung, builds cloud‑native platforms and AI‑driven solutions for enterprise clients. As a Kotlin Backend Developer you will design and implement scalable REST‑API services, architect resilient backend systems, and drive automation across the software lifecycle while mentoring teammates.

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

Backend Developer at Baanx will design, build, and maintain high‑performance services for digital asset platforms. The role focuses on Node.js microservices, PostgreSQL data stores, and integration with crypto custodians, exchanges, and other third‑party APIs.

Devoteam Germany is a KI-based technology consultancy specializing in cloud platforms, cybersecurity, data, and AI, supporting digital transformation for over 2,000 German customers. As a Kotlin Backend Developer, you will design scalable, resilient REST-based backend architectures, own the full lifecycle of API-first applications in agile teams, and translate business requirements into technical solutions.

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.

Health System Services (HSS) builds digital solutions for the German health market, focusing on data management and backend services. As a Software Developer Backend you will design, develop, and optimize C++ and PHP applications, implement database algorithms, and support import/export processes while collaborating with QA and product teams.

AEM Backend Developer on the Digital Experience team, building enterprise-grade digital experiences using Adobe Experience Manager. Designs, develops, and maintains backend AEM solutions, integrates REST APIs, and collaborates with multidisciplinary teams to deliver scalable web content management platforms.

Engineering team at zeitsprung GmbH focuses on building scalable backend services for their platform. The Senior Backend Developer designs, implements, and optimizes APIs and data pipelines, collaborates with cross‑functional teams to ensure reliability and performance, and mentors junior engineers.

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 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.

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.

CHECK24 Explorer team builds data‑driven recommendation systems for travel and activity bookings. The Full‑Stack Developer creates end‑to‑end features, designs scalable PHP and Go services, and enhances the Next.js frontend while integrating AI‑powered recommendation engines.

HolidayPirates Group is a travel deals company seeking a Backend Engineer to design, build, and maintain core backend services and scalable APIs using Clojure. You will collaborate with product and engineering teams, contribute to system performance and reliability, and participate in technical decisions with real ownership.