Product Engineer (Staff/Founding/Lead/Principal/Director)

Tact; Lisboa; Remote; EUR 144,000 - 176,000; Full time

Benefits offered by this job

Equity

Remote-first

Job summary

Tact is hiring a Product Engineer to help build AI agent-based software in a Lisbon-based, remote-first setup. You will help scale a brand-new tech team, shaping architecture and product decisions while delivering enterprise-ready AI products.

You will work with modern AI tools, collaborate with customers, and own parts of the engineering workflow from conception to deployment. Equity is part of the package, with a base up to €160K.

Qualifications

• Experience building AI-powered software or AI agents in production environments.
• Strong software design and system architecture abilities.
• Comfort working with enterprise customers and shaping product direction.

Responsibilities

• Build AI-powered products for enterprise customers.
• Lead architecture decisions and ensure high-quality, reliable AI code.
• Collaborate directly with customers and influence product roadmap.

Skills

AI agent development

Software architecture

Customer-facing collaboration

Remote collaboration

Tools

Claude Code

Codex

Cursor

Job description

Product Engineer | Agentic AI | Up to €160K + Equity | Lisbon, Fully Remote

An opportunity to join one of Europe's most exciting AI startups, having raised over €50M in its first year.

They're building AI agents that automate complex business processes for major enterprise customers. The technology is already in production, solving real problems for real businesses.

The ambition is to build a top 1% engineering team, bringing together people who are passionate about building great software and pushing the boundaries of AI-native development.

The aim is to build and scale out a brand new tech team in Lisbon. As well as open a co-working space/office while staying remote first.

Why is this interesting?

• Up to €160K base + equity.
• Fully remote, based in Lisbon. No mandatory office days.
• Over €50M raised, with approximately 60 employees.
• Access to Claude Code, Codex and other advanced AI engineering tools, with generous budgets.
• Build real AI products already used by enterprise customers.
• Work directly with customers and influence what gets built.
• Small, autonomous engineering teams with genuine ownership.

What they're looking for

There's no requirement to have worked at a particular company or to know a specific technology stack.

They're particularly interested in engineers who are already finding interesting ways to use AI agents to build software in their current workplace and ideally has been customer facing.

You might be someone who:

• Uses Claude Code, Codex, Cursor or similar tools as a regular part of development.
• Experiments with multiple coding agents, parallel workflows or delegating different engineering tasks to AI.
• Uses AI to help with planning, writing specifications, building features, testing or reviewing code.
• Has built custom tools, MCP integrations or automated parts of their engineering workflow
• Thinks about the customer problem, not just the code, and enjoys having ownership over product decisions.
• Cares about good architecture, simple solutions and making sure AI-generated code is reliable.

You don't need experience with all of these. If you're using AI agents in your development process, experimenting with new approaches and can explain what you've learned, they'd be interested in speaking with you.

They're already using Claude Code, Codex, parallel agents and spec-driven development to automate coding, testing and reviews, with engineers focusing on architecture, product decisions and quality.

Engineers work directly with customers, shape and iterate on products, and have the autonomy to drive them forward independently, with support from other engineers whenever needed.

If you're a Lisbon-based engineer already using AI agents to build software, whether that's Claude Code, Codex, parallel agents or your own workflows, I'd be keen to hear from you.