Top Software Engineer Jobs in Cologne

Build and ship native iOS features in Swift for an AI-enabled neobank. Implement clean user journeys for insurance, payments and financial services, integrate backend APIs, optimise performance and reliability, use analytics to iterate, and add AI-assisted mobile experiences where beneficial.

Build and maintain scalable, reliable agentic AI systems for biomedical research, integrating LLMs, tool-calling, and data platforms. Drive technical decisions, optimize analytical workflows, deploy agents on the data platform, mentor teammates, and participate in on-call rotation to ensure performance, security, and continuous improvement.

As a Senior iOS Engineer, you will lead engineering decisions, actively ship production code, maintain app architecture, and enhance user experiences for the Speechify iOS app.

The Lead Golang Software Engineer develops server solutions, leads technical designs and code reviews, mentors colleagues, and ensures the quality of engineering practices in the Commercial Systems unit.

The Python Software Engineer will develop and maintain test automation tools for hardware certification and improve Linux testing methods.

You will build and maintain container images, automate CI/CD processes, engage with the community, and mentor junior team members in a collaborative environment.

Drive process improvement, coach colleagues, and manage features in a distributed system for cloud automation and software operations.

Lead Python Software Engineer responsible for developing solutions, collaborating on designs, mentoring team members, and enhancing engineering practices.

Develop and enhance dqlite, a distributed SQLite database, including debugging, implementing features, and engaging with the open source community.

As a Core Software Engineer, optimize performance in the ClickHouse database, collaborate on performance testing, support debugging, and engage with the open-source community.

As a Senior Software Engineer, you will enhance the REDAPL platform, leading initiatives in data ingestion, processing, and supporting infrastructure-related projects while mentoring other engineers.

Join the Billing Engineering team to build ClickHouse Cloud's billing platform, integrating with diverse systems and ensuring reliability, scalability, and security.

Build and ship end-to-end features and agentic automations for North, Cohere's AI workspace for finance. Integrate financial data sources, enforce data isolation and RBAC, collaborate with Product/UX/ML/Sales, work with finance customers, ensure reliability/security/auditability, and iterate on platform capabilities using AI where appropriate.

As a Forward Deployed Engineer, you'll collaboratively deliver innovative solutions, working closely with clients to tackle complex projects and drive real impact using ElevenLabs’ technologies.

The role involves designing and implementing features, debugging, maintaining documentation, and collaborating with the community in the Mir graphics stack.

Build and scale Base360.ai: design APIs, services, and cloud-native infrastructure; implement event-driven automations, AI-powered workflows, and integrations (Airbnb, Stripe, Twilio, OpenAI). Own projects end-to-end to automate operations, improve pricing and guest experiences, and enable global scaling.

Build and maintain North's Agents & Automations platform: design and ship frontend and backend features, execution engine, integrations, debugging, observability, evaluation, and feedback systems to enable reliable AI-powered workflows.

Own and improve the RustRover debugger across a C++ OS-specific backend (LLDB/GDB) and a Kotlin/Java IntelliJ client. Implement run/debug configs, enhance Rust expression evaluation, diagnose OS-specific C++ crashes, and design maintainable, well-tested debugger code while collaborating with QA and support.

Build ML prototypes and data pipelines, collaborate with researchers and product engineering to integrate models into Fusion, containerize and deploy applications, implement best practices, and document architectures to accelerate research-to-production workflows.

Develop and optimize Soroban smart contracts and integrate anchor services on the Stellar network for cross-border payment solutions. Collaborate with cross-functional teams, test and debug smart contracts, document development processes, provide technical support, and stay current with blockchain and payments technology trends to ensure secure and efficient implementations.

Implement and optimize EVM-compatible features, reduce gas usage, develop and test smart contracts, collaborate on Ethereum infrastructure, and provide technical support.

Build and maintain high-security mobile wallet apps using React Native, Swift, or Kotlin. Implement biometric authentication and secure key storage, collaborate with cross-functional teams, debug performance issues, and propose UX and security improvements.

Develop and maintain ClickHouse Cloud interfaces and dashboards, collaborating with cross-functional teams while ensuring code quality and scalability.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

Seeking software engineers with at least 2 years of production backend experience, interested in crypto and blockchain technologies, for roles with portfolio companies.