Senior Platform Engineer, Agentic Systems
Europe, Finland or Spain preferred

Join one of the fastest growing rewards/fintech startups in the world - Benjamin Backed by Play Ventures and F4 Fund, we're all about making everyday actions rewarding. We're looking for an experienced

Senior Platform Engineer, Agentic Systems

to help us take things to the next level.

At Benjamin, we give users real cash rewards - what we call MoMos (Money Moments) - for things they are already doing. From playing games and watching ads to everyday card purchases with cash back, we are all about putting money back in people's pockets.

What you’ll do

Agent runtime and orchestration architecture

Multi-step planning, task decomposition and execution control

Model selection, routing and fallback

Tool selection, invocation and result verification

Agent state, context, memory and durable resumption

Human-in-the-loop controls for ambiguity and high-risk actions

Recovery from model, tool and workflow failures

Tracing, replay and debugging across agent trajectories

Evaluations for task completion,



correctness, safety and regression

Guardrails, permissions and approval flows

Platform primitives used to build additional agents and workflows

What we’re looking for

Direct experience building and operating agentic systems in production

Hands-on ownership of substantial parts of an agent runtime, harness or orchestration platform

Experience with agents that perform multi-step work through tools and external systems

Strong understanding of agent failure modes, including looping, tool misuse, context loss, false completion and partial execution

Experience with durable state, suspension, resumption and recovery

Experience building agent evaluations, trajectory analysis or regression suites

Experience debugging production behavior from traces, tool calls and execution history

Strong judgment about when to use model reasoning, deterministic logic or human review

A record of shipping a

📌 Senior Platform Engineer, Agentic Systems (Madrid)
🏢 benjamin
📍 Madrid