Senior AI Engineer: Production-Ready LLMs for FinTech (Lisbon)

Time to Hire; Portugal; On-site; EUR 70,000 - 100,000; Full time

Job summary

Time to Hire in Lisbon, Portugal is seeking a Senior AI Engineer to build AI agents for a fintech startup. You will design AI agents, integrate LLMs with tools, and deploy production-grade AI systems in a fast-growing European fintech.

You will work on reliable AI architectures, evaluation, and performance optimizations, collaborating with engineers to ship end-to-end AI solutions for accounting tasks and workflows.

Qualifications

• Production systems experience (APIs, databases, distributed systems).
• Experience shipping LLM applications: tool calling, agents, workflows.
• Knowledge of testing nondeterministic systems.
• Pragmatic approach: AI fit vs traditional software.
• Ownership from idea to production; professional English.
• No ML research or accounting background required.

Responsibilities

• Design AI agents and workflows using LLMs, tools, and data.
• Ensure reliability of AI in production with deterministic logic.
• Build evals, identify failure modes, and improve accuracy and cost.
• Develop APIs, integrations, long-running AI workflows (Python, Django, PostgreSQL, GCP).
• Shape the company's AI architecture and engineering practices.

Skills

Production systems

LLM apps

Agent workflows

Nondeterministic testing

Ownership mindset

English proficiency

Tools

APIs

Databases

Distributed systems

Job description

Time to Hire in Lisbon, Portugal is seeking a Senior AI Engineer to build AI agents for a fintech startup. You will design AI agents, integrate LLMs with tools, and deploy production-grade AI systems in a fast-growing European fintech.

You will work on reliable AI architectures, evaluation, and performance optimizations, collaborating with engineers to ship end-to-end AI solutions for accounting tasks and workflows.