Senior AI Platform Engineer
Primary stack
Job description
About the Position
New Coinis MCP is live. Run your whole ad campaign by talking to your AI. See how it works →
Coinis is launching an AI media buyer that drafts, launches, and optimizes ad campaigns on its own. You will build it. You design the agent loop, the tool layer, the memory layer, and the guardrails. The agent sits on top of the same Meta Business API integrations our users run manually today.
Responsibilities
- Design and ship the agentic layer that drives automated campaign decisions.
- Build a tool-use framework on top of Claude and other frontier models.
- Ship memory and state for long-running, multi-step advertising workflows.
- Define guardrails, spend caps, and escalation paths the agent must respect.
- Instrument every step. Replayable traces. Every decision auditable.
- Partner with the media buying team. Encode their real playbooks into the agent.
- Build eval harnesses that compare agent performance to human media buyers.
Requirements
Must Have
- 5+ years in backend or ML engineering.
- Production experience with LLM tool-use, function calling, or agent frameworks.
- Strong Python. Async and streaming comfort.
- Experience building systems that take real actions on behalf of users. Not just chatbots.
- Deep respect for observability, evals, and failure modes.
Nice to Have
- Anthropic Claude API, OpenAI API, or similar at scale.
- LangGraph, CrewAI, or custom agent orchestration.
- Ad tech, performance marketing, or media buying context.
- Experience with vector databases and semantic memory.
Qualifications
Education
BSc or MSc in Computer Science, ML, or related.
Experience
5+ years
Skills
- Python
- LLM Tool Use
- Agent Frameworks
- Observability
- Evals
- Anthropic Claude API
- OpenAI API
- LangGraph
- Ad tech
- Vector Databases
We Offer
- Competitive salary in EUR.
- Equity in the SaaS spinout.
- Real agentic product, not a research demo.
- Live ad spend as the test environment. Your agent ships to real Meta accounts.
- Remote-first, flexible hours.
- AI tooling and compute budget.
About the Company
Coinis is at the forefront of AI-driven advertising, providing innovative solutions to automate and optimize ad campaigns. Join our team to shape the future of media buying with AI.
Apply for this role to be part of our exciting journey.
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Coinis is a successful ad tech company that puts emphasis primarily on personal development and career challenges with innovative projects.The collective consists of hot-blooded, passionate, and hard-powered professionals who indulge in every task with devotion and enthusiasm.