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’re already doing. From playing games and watching ads
to everyday card purchases with cash back, we’re 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 capabilities and owning their production
performa

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