Senior AI Platform Engineer , Agentic Workflows

1 open position

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Functional Area
Engineering
Employment
Full-time
Work Hours
Flexible, EU timezones
Location
Remote (EU timezones) or Podgorica, Montenegro
About us
## What you will do - 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.
About your position
Soon Coinis will launch an AI media buyer that drafts, launches, and optimizes ad campaigns on its own. You 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.
Job 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
01

Education

BSc or MSc in Computer Science, ML, or related.
02

Experience

5+ years
03

Skills

Python, Claude API, LLM Tool Use, Agent Frameworks, LangGraph, Observability, Evals, Meta Business API, Vector Databases
What we offer
## What you get - 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.
Other information
This is a staff-track role. You will influence architecture across the platform.
Our offices

Cozy. Quiet. Good coffee.

Some of us spend more than half of the day here. That is how good they are.

Lounge Coinis teammate working from a soft-lit lounge corner in the office
Cozy lounge Soft lights. Quiet hours. Deep work.
Discussion Coinis teammates in a focused discussion around a whiteboard in the office
Whiteboard talk Sleeves up. Markers out. Ship it.
Coinis teammate taking a focus call inside an acoustic phone booth
Phone booth Four of them. Bookable. Quiet.
Plant day Coinis teammates smiling while holding potted plants in the office
Plant day Pots. Dirt. A little dignity lost.
Coinis teammates in a focused working session at a meeting room table
Meeting room Heads down. Door closed. Done.
Paint day Coinis teammates painting together during a creative office session
Paint session Rollers. Canvas. Coffee stains.
Dogs welcome Coinis teammates working on laptops with an office dog sitting beside them
Office dog Good boy. Bad at slack replies.
Coinis teammate at a sunny desk working in the afternoon light
Sunny desk Afternoon light. Good for the screen.
Library Coinis teammate reading a book in the office library corner
Library corner Hardcovers. Lamp on. Phone down.
Coinis team posing for a group photo on the office floor
Office floor Where most of the magic happens.
Coinis teammate creating artwork at an office desk
Art corner Paint. Paper. A little noise.
Midday Coinis teammates in a quiet midday meditation session at the office
Ten-minute reset Eyes closed. Laptops asleep.
Coinis teammates in a creative art session with sketchbooks at the office
Creative session Sketchbooks. Markers. Music low.
Coinis teammate reading a book at a quiet office spot
Reading hour Book open. Tab closed.
Game night Coinis teammates playing a board game during casual office game night
Game night Board out. Nobody remembers the rules.
Coinis teammate relaxing on a sofa in the modern office lounge
Off the clock Sofa. No laptop. Not today.