- 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 build the B2B product experiences that help merchants manage and grow their business with seQura
- The team owns merchant-facing products and the platform behind them, including order management, analytics, self-service capabilities, growth initiatives and platform features used by other B2B teams

- 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

- AI-assisted development is part of our daily workflow. As implementation gets faster,



we expect engineers to spend more of their judgment on what to build, why it matters and what we learn from it

- 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

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

- Month 2: Learn the B2B domain, Merchant Portal, codebase and current initiatives. Shadow a Champion, meet key stakeholders and start contributing

- 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

- Urban mobility by using your own bike with Kleta.

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

- Health insurance discounts with Sanitas and Adeslas

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

- Hybrid work
- Professional development workshops or seminars tailored to your needs

- Adaptable compensation plan for transportation, restaurants, and kindergarten with Cobee- Strong product and customer curiosity

- 7+ years of experience building production software

- Comfortable working directly with stakeholders and other teams

- Comfortable working with ambiguity and incomplete information

- High autonomy, ownership and accountability

- Experience using AI meaningfully in your software development workflow

- Strong software engineering fundamentals
- Experience owning work beyond implementation

- Comfortable working across backend and frontend when needed

- Strong written and verbal communication skills in English

- Experience with product discovery, experimentation or success metrics

- Strong full-stack experience

- Experience with Ruby on Rails and/or React

- Experience building platforms or capabilities used by other teams

- 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 Experience) (Barcelona)
🏢 Sequra
📍 Barcelona