Product Engineer (Full-Stack) | AI Product Development at REF Agency | Berlin | Rezi

Product Engineer (Full-Stack) | AI Product Development at REF Agency

Product Engineer (Full-Stack) | AI Product Development

REF Agency · Berlin

1 weeks ago

Product Engineer (Full-Stack) | AI Product Development

REF Agency · Berlin

11 days ago
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About the Role

We are seeking an exceptional Product Engineer to join a fast-moving AI startup. In this role, you will own the entire product lifecycle, from identifying customer problems to designing, building, shipping, and improving solutions. You will work directly on customer challenges, make product decisions, and take complete ownership of your work, offering significant product impact from day one.

Responsibilities

  • Own features from concept through production and iteration.
  • Identify customer pain points and proactively build solutions.
  • Collaborate closely with engineers, founders, and customers to improve the product.
  • Design pragmatic technical solutions that balance engineering quality with business value.
  • Ship production-ready features rapidly and iterate based on user feedback.
  • Make product decisions, prioritize trade-offs, and continuously improve the customer experience.
  • Use AI tools to increase engineering productivity and accelerate development.
  • Contribute to a highly collaborative, in-person engineering culture.

Requirements

  • Strong full-stack software engineering experience.
  • Experience owning products or features end-to-end.
  • Strong product thinking and customer-first mindset.
  • Excellent problem-solving abilities.
  • Ability to make pragmatic engineering decisions.
  • High level of autonomy and ownership.
  • Comfortable working in an extremely fast-paced startup environment.
  • Strong communication skills in English.
  • Built side projects, startups, open-source projects or participated in hackathons.
  • Demonstrated high ownership and measurable business impact in previous roles.
  • Experience working in early-stage or high-growth startup environments.
  • Previously wanted to transition from engineering into product ownership—or product managers returning to hands-on building.
  • A "figure it out" mentality with evidence to support it.
  • Strong engineering fundamentals.
  • Love taking ownership rather than waiting for direction.
  • Enjoy solving customer problems, not just technical challenges.
  • Move quickly while making thoughtful trade-offs.
  • Learn new technologies independently.
  • Prefer building and shipping over endless planning.
  • Are motivated by impact and business outcomes.
  • Enjoy working closely with your team in person.

Skills

  • Full-stack development
  • TypeScript
  • Python
  • Modern web technologies
  • APIs
  • Cloud-based applications
  • AI-assisted software development tools

Location

  • Berlin, Germany

Work Type

  • On-site
  • Full-time

Experience Level

  • Full-stack software engineering experience
  • Experience owning products or features end-to-end
  • Experience working in early-stage or high-growth startup environments

Benefits

  • Relocation support available for outstanding international candidates.
  • Visa sponsorship may be considered for exceptional profiles.

About the Company

  • We are a fast-moving AI startup.
  • Ownership, speed, and execution are at the core of the engineering culture.