Top Software Engineer Jobs in Cologne

The Software Engineer will manage data collection for model training at Speechify, handling infrastructure on GCP, and collaborating with AI scientists.

Lead rapid end-to-end prototyping of LLM-powered agent systems: build working prototypes, design experiments measuring quality/latency/cost/user impact, validate with users, produce reference implementations, and hand off to product teams to inform roadmap decisions.

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.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

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.

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.

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.

Design, build, and maintain Joybuy backend systems focusing on performance, availability, concurrency, security, and scalability. Mitigate technical risks, implement monitoring and rollback strategies, research and adopt new technologies, and identify integrations to improve architecture and team technical growth.

Lead architecture and backend development for international core systems, ensuring high availability, concurrency, security, and scalability. Design Java/Spring Boot services, optimize performance, integrate MySQL/Redis/Kafka, manage technical risk, drive productization, mentor engineers, and coordinate with suppliers and product teams. Onsite role in London supporting European operations.

Develop and maintain Joybuy backend services for European retail markets, emphasizing high performance, availability, concurrency, security, scalability, and global integration. Mitigate technical risks, implement monitoring and rollback strategies, research and adopt new technologies, and collaborate with product teams across marketing, fulfillment, and supply chain.

Develop, optimize and maintain software solutions in an agile team. Design algorithms, data structures and subsystems; debug complex issues; benchmark and improve performance; work with frontend and backend technologies, databases, containers and CI/test systems; contribute to documentation and process improvements.

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.

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.

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.

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.

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

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.

Develop, debug, document, test and support corporate software using Java and cloud technologies. Collaborate with QA, assist in requirements gathering, manage tasks across the project lifecycle, and participate in on-site implementation when needed.

Lead design and development of low-level Linux instrumentation and eBPF-based runtime security features for detection, monitoring, and workload protection. Drive architecture, implement performance-sensitive systems, establish testing methodologies, deliver end-to-end features, and provide technical leadership and cross-team collaboration across Datadog's security products.