Software Engineer - Agents

You'll own two things simultaneously: the shared agentic infrastructure that makes intelligent workflows possible at Tensec, and the agents and product features that run on top of it. One day you're designing the context management system that every agent depends on. The next you're shipping an agent that automates a workflow for our operations or treasury team — or a feature that a customer interacts with directly.

This isn't a role with a narrow scope. You'll be expected to understand the business problems behind the work, not just execute on specs. You'll own problems end to end and see them through to production.

Design and build the core agentic infrastructure at Tensec: orchestration, tool execution, context and session management, policy controls, and observability

Build, ship, and operate agents that automate real financial workflows across operations, compliance, and treasury, from transaction document review to Know Your Business and sanctions screening

Ship product features end to end, from backend services and APIs to experiences built on top of agentic capabilities, serving both internal and external customers

Drive build versus buy decisions on third-party components, integrate where it accelerates us, own what matters for reliability and trust

Build evaluation and monitoring systems to ensure agents are accurate, reliable, and safe in a regulated financial environment

Implement routing logic to optimize large language model usage across providers

Contribute to engineering standards, code review, and the technical growth of the team

5+ years of backend software engineering with a track record of shipping production systems end to end

Hands-on experience building and shipping agentic systems or large language model-powered workflows in production

Strong product sense: you understand business needs, think from the end user's perspective, and care about whether what you ship actually creates value

Strong fundamentals across APIs, distributed systems, databases, and cloud-native architecture

Comfortable moving between infrastructure thinking and hands-on product iteration, you don't stay in one lane

Comfortable owning ambiguous problems,you can scope, build, ship, and iterate without a lot of hand-holding

Experience in an early-stage startup or demonstrated ability to work at that pace

Node.js or Python backend experience; comfort with AWS and modern CI/CD tooling

Experience or genuine interest in regulated industries where correctness and compliance are non-negotiable

Experience with multi-model or multi-provider artificial intelligence systems

Familiarity with orchestration frameworks, tool use, Model Context Protocol surfaces, or evaluation pipelines

Background in cross-border payments, Anti-Money Laundering, or transaction monitoring

How to build production-grade AI systems in a compliance-sensitive financial environment

Cross-border payments and FX infrastructure at scale across Brazil, Mexico, the US, and beyond

What it looks like to build a company from the ground up, with real ownership and real stakes