Senior Full-Stack Engineer (PST time)

About the Role

Join an early-stage team building AI-powered software for transportation and logistics. You will own production features end to end, with a focus on voice and email agents that support high-stakes freight workflows.

What You'll Do

• Scope problems with customers, build across the stack, deploy features, and monitor their production performance.

• Develop voice and email agents, including speech pipelines, LLM orchestration, and deterministic safeguards for prices, terms, and actions.

• Create evaluation systems using golden datasets, regression checks, hallucination testing, and tool-call correctness checks.

• Build retrieval and matching systems with embeddings and reranking, balancing cost, latency, and scale.

• Instrument production systems and use observability and rollout strategies to operate software reliably.

What We're Looking For

• At least 5 years of professional software engineering experience, with end-to-end ownership of production software across the stack.

• Hands-on experience taking LLM features to production, including architecture, tool-calling, and retrieval, plus evaluation and testing of AI systems.

• Experience shipping with React, Next.js, Supabase, and Python.

• Familiarity with agent or voice tooling such as Pipecat, LangChain, LiveKit, or equivalent tools.

• Strong system design fundamentals, including streaming, concurrency, SQL, and reasoning about scale and cost.

• Experience with production observability and deployment rollouts, and regular use of AI coding assistants with careful verification.

• Voice or real-time systems experience, early-stage engineering experience, complex tool-use systems, or substantial open-source and personal projects are valuable.

Compensation & Benefits

Salary range: $5,000 to $9,000 USD annually. Visa sponsorship is not available.

Location

Remote, based in Latin America.