- We’re looking for a Senior Product Builder who wants to own product problems, not just engineering tasks

- You’ll work across the full lifecycle of B2B initiatives:

- Understand → shape → build → ship → measure → iterate

- This is not a frontend or backend-specific role. Our main stack is Ruby on Rails and React, but we care more about strong engineering fundamentals, product judgment and the ability to work across the stack when needed

- You won’t receive a perfectly specified backlog. You’ll be expected to help create the work: understand merchants and the business, challenge assumptions, work through ambiguity and decide with the team what is worth building

- We are a small team of senior Product Engineers and a Product Designer, with no dedicated Product Manager by design

- Engineers are expected to contribute beyond implementation: understanding problems, shaping opportunities, making product and technical decisions, shipping solutions and checking their outcomes

- Initiatives are led by engineers who take ownership of a problem, gather context, define the hypothesis and success criteria, shape the work, drive delivery and follow up after launch

- Own product initiatives end-to-end, from problem understanding to outcome validation

- Act as Champion for initiatives: gather context, define hypotheses and success criteria, shape the work and drive it forward

- Work directly with merchants, business stakeholders, Product Design and other engineering teams when needed

- Build and operate production software across backend and frontend

- Make pragmatic product and technical decisions with incomplete information

- Use data, feedback and experiments to decide whether to iterate, change direction or stop

- Contribute to evolving Merchant Portal into a platform other B2B teams can build on

- Use AI throughout your workflow, including exploration, implementation, testing,



debugging and learning unfamiliar systems

- What to expect in the next 90 days ?

- Month 1
- Learn the B2B domain, Merchant Portal, codebase and current initiatives. Shadow a Champion, meet key stakeholders and start contributing

- Month 2
- Own a small initiative with support from the team, from understanding the problem to shipping it

- Month 3
- Act as Champion for an initiative: frame the problem, define the hypothesis and success criteria, ship a solution and check the outcome

Benefits

- Adaptable compensation plan for transportation, restaurants, and kindergarten with Cobee

- 23 vacation days + 2 days of free disposal per year

- Urban mobility by using your own bike with Kleta.

- Free access to healthy, organic, and sustainable fruits and snacks.

- Professional development workshops or seminars tailored to your needs

- Hybrid work
- Health insurance discounts with Sanitas and Adeslas- Experience owning work beyond implementation

- Comfortable working with ambiguity and incomplete information

- Strong product and customer curiosity

- Experience using AI meaningfully in your software development workflow

- Comfortable working across backend and frontend when needed

- High autonomy, ownership and accountability

- Comfortable working directly with stakeholders and other teams

- Strong written and verbal communication skills in English

- 7+ years of experience building production software

- Strong software engineering fundamentals
- Strong full-stack experience

- Experience building platforms or capabilities used by other teams

- Experience with Ruby on Rails and/or React

- Experience with product discovery, experimentation or success metrics

- Spanish fluency- Interview with our People Team

- Technical take-home challenge

- Live peer review of the challenge

- Meet the team
- We kindly ask that you submit your CV in English, as it is the official language of our community

📌 Senior Product Software Engineer (Merchant Area) (Barcelona)
🏢 Sequra
📍 Barcelona