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 ambitious agent capabili

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