Senior BE AI Engineer

We’re Sloneek, a fast-growing European HR tech startup on a mission to change HR for the better. Our platform helps organizations run smoothly — managing people, data, and workflows with clarity, accountability, and a touch of AI magic.

We’re 35+ people across Europe, working hybrid and remote, and gearing up for our next growth round. Now we’re building our AI backend foundation — and we’re looking for our first senior engineer to make it happen.

This is your chance to build from the ground up, not just maintain what already exists.

🧠 Your Playground (Tech Stack & Focus Areas)

You’ll work in a modern, AI-powered backend environment that blends reliability with cutting-edge experimentation:

• Language: Python 🐍 (core backend language)
• Framework: FastAPI ⚡ (high-performance, async-ready APIs)
• Database: PostgreSQL 🗄️ (relational, scalable, with some JSONB magic)
• AI Layer: LLM-based agents (OpenAI / Anthropic models) for automation, reasoning, and HR insights
• Protocols: Model Context Protocol (MCP) — powering next-gen agent integrations
• Infra: Kubernetes, Bitbucket/GitHub Actions, AWS
• Monitoring: Prometheus / Grafana stack (or alternatives you can help define)

You’ll design the architecture behind AI-assisted HR workflows, connecting structured data, human actions, and intelligent automation into one seamless experience.

💪 What You’ll Actually Be Doing

• Architect & build scalable backend systems for our core HR product using Python and FastAPI.
• Integrate AI agents into production systems — think: automated onboarding workflows, smart document handling, and insight generation.
• Design and optimize APIs that connect frontend, AI services, and internal systems.
• Collaborate cross-functionally with product, design, and AI teams to ship features that make HR simpler and smarter.
• Experiment with MCP integration, helping shape how our agents interact with live company data and user actions.
• Define standards for clean code, performance, and data security as we scale.

💡 You Might Be a Fit If You…

• Have deep Python experience, ideally with async frameworks like FastAPI or Flask.
• Know your way around PostgreSQL.
• Have built or scaled RESTful APIs that power real products.
• Are curious about AI agent design, prompt orchestration, or workflow automation — even if you’re not an ML researcher.
• Love clean architecture and care about how systems evolve, not just how they run.
• Are proactive, communicative, and comfortable in fast-moving, high-ownership environments.
• Want to be part of a team where decisions are owned, not passed around.

✨ Why Join Sloneek

• You’ll be the first hire shaping the AI backend layer of a product used by growing teams across Europe.
• You’ll work with a mission-driven company where tech and people culture grow together.
• You’ll get autonomy, visibility, and influence — no corporate layers.
• You’ll be part of a team that values accountability, challenge, and creativity (plus good humor).
• You’ll help build something that truly changes how people work — smarter, simpler, and more human.

If you’re passionate about backend architecture, AI integration, and building from zero with real impact, we’d love to hear from you.

Let’s reinvent HR together — one smart API at a time.