Job Opportunities API

Reaktor's award-winning tech community is looking for AI Developers to join us in Helsinki. If you thrive on applying cutting-edge AI technologies, building LLM-powered applications, and driving projects through the full software development lifecycle, and you're passionate about solving real human problems with a holistic approach, we'd love to meet you. Join us to experience a truly collaborative, low-hierarchy environment where your curiosity and ideas can make a real impact. As an AI Developer at Reaktor, your job is to be an expert in a range of AI-related software development responsibilities spanning the entire software development lifecycle, from front-end to production. Your daily tasks include: • Designing and implementing end-to-end LLM-enabled applications from backend architecture to user-facing components, ensuring scalability and maintainability • Integrating commercial and open source LLMs (e.g. OpenAI, Anthropic, Meta Llama) into production applications and workflows, using APIs or fine-tuning • Working with end-to-end RAG pipelines, including embeddings, vector databases (e.g. PostgreSQL + pgvector, chromaDB, pinecone), robust prompt engineering strategies and guardrails • Designing and implementing evaluation pipelines to benchmark model performance and safety • Collaborating with cross-functional teams, contributing to AI use cases for complex business challenges • Working with the client's tech and business teams and helping them pick the right technologies • Delivering world-class technical expertise to client and team • Other software development tasks: architecture/design, test automation, debugging To thrive in this position, you'll need: • Experience with AI software development technologies (LLMs, backend, frontend, ops, consulting) in production • Experience deploying AI applications in cloud environments (Azure, AWS, GCP) with containerization (Docker, Kubernetes) • Foundational DevOps knowledge: CI, automated deployment, test automation • Know-how on vector databases (PostgreSQL + pgvector, pgvectorscale, chromaDB, pinecone) • Awareness of GDPR, security, and ethical considerations with AI • Comfortable engaging with client stakeholders • Fluent verbal & written Finnish and English skills Technologies in our projects: • Python or Node.js/TypeScript with frameworks like LangChain, FastAPI, LlamaIndex • Some projects require JVM-based languages Why join us: Variety of industries (Healthcare, Public Sector, Industrial, Retail, Defense & Security, Aero, Gaming & Entertainment); team chooses approach/tech with the client; supportive low-hierarchy community; sustainable work-life balance with daily-life support; internal training and Cloud Academy; 300+ hobby clubs.