Senior Product Software Engineer – Merchant Area

Location: Barcelona, Spain Workplace: hybrid About seQura seQura provides innovative, flexible and easy-to-use payment technologies that help merchants acquire, convert and retain more customers. We make a difference in sales performance by tailoring our solutions to different sectors, to address their unique pain points and deliver superior results in Retail, Education, Eyewear, Repairs and Travel. We also empower smart shopping to consumers who seek more value, convenience, and flexibility in their shopping, with new payment experiences that allow them to save, access interest-free credit, or pay in small, comfortable installments of up to 24 months. Born in Barcelona, seQura is a privately-owned fintech, currently expanding throughout southern Europe and Latin America, growing above 50% CAGR. Over 6000 businesses, almost 3 million shoppers, and almost 400 employees continue to rate us as one of the most loved and trusted fintechs out there, with an NPS of 87%, a Trustpilot rating of 4.7/5, and a Glassdoor rating of 4.1/5. About the role 🤓 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. How we build at seQura 🤖 AI-assisted development is how our engineers work every day. We use AI agents to think through problems, write, review and iterate on code, and we're looking for engineers who already work this way, or are actively making the shift. What matters to us isn't whether you know the syntax and idioms of your preferred programming language or tech stack by heart. It's whether you understand the problem you're solving, can explain the business logic behind it, and own every line you ship, no matter who (or what) wrote it first. AI helps you move faster, challenge assumptions, explore different approaches and improve your solutions. But knowing which questions to ask, making sound technical and product decisions, and taking responsibility for the outcome is always up to you. Our technical interviews reflect this approach: you'll use your own AI tools, and we'll ask you to walk us through your solution, both the business reasoning and the code. If you're only interested in technical challenges without engaging in the product decisions behind them, or you'd rather not work with AI, this probably isn't the right role for you. About the Merchant Experience team 🧩 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 . What challenges you'll be solving 🚀 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. What you’ll need 🤝 Must have: 7+ years of experience building production software. Strong software engineering fundamentals. Experience owning work beyond implementation. Comfortable working across backend and frontend when needed. Comfortable working with ambiguity and incomplete information. Strong product and customer curiosity. High autonomy, ownership and accountability. Comfortable working directly with stakeholders and other teams. Experience using AI meaningfully in your software development workflow. Strong written and verbal communication skills in English. Nice to have: Experience with Ruby on Rails and/or React. Strong full-stack experience. Experience building platforms or capabilities used by other teams. Experience with product discovery, experimentation or success metrics. Spanish fluency. What we offer 😎 We have a strong and sustainable foundation, where we provide a secure and reliable workplace. You have the freedom and trust to make the best contribution possible. One of our most valued strengths by our employees is our fellowship and supportive culture, which fosters a sense of belonging by working closely with our values. With us, you will have challenging projects to work on and push your skills and knowledge. In addition, we are very proud of the unique office we have, which offers a comfortable and inspiring environment to work in with everything you need. 23 vacation days + 2 days of free disposal per year. Flexible compensation plan for transportation, restaurants, and kindergarten with Cobee. Health insurance discounts Flexible working hours. A personal budget for professional development. Hybrid or fully remote work. Office workshops and meet-ups to encourage community participation and career growth. Moreover, we have a Wellness Program that embraces a holistic approach by covering 6 areas (occupational, physical, financial, emotional, social, and environmental consciousness). Each area will include a variety of activities, and you'll be able to choose from 34 different activities that best meet your needs to configure a plan that best works for you. Which are the next steps? 🙌 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. We promote equal opportunity to all, regardless of age, color, gender identity, medical condition, physical or mental disability, race, religion, sexual orientation, or any other characteristic. We have an inclusive environment, and respect is above all. Do you want to be part of the change? Join us!👇