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Backend Software Engineer

💼 Full-time🗓 2026-06-24

Core

Building scalable, maintainable, and resilient microservices and features for a high-scale online curated marketplace handling search, discovery, bidding, curation, logistics, payments, and support.

Role type

Backend Software Engineer

Builds

End-to-end microservices and product features for search & discovery, bidding, curation, logistics, payments, and support

Domain

E-commerce / Online Marketplace

Deliverable

production ML models | product features

Required skills

Ruby, Object-Oriented Programming (OOP), API design, SQL, relational databases, high availability, low latency, consistency

Preferred skills

Experience with customer-facing products in e-commerce, fintechs, or SaaS

Technologies

Ruby, SQL

Responsibilities

Design, develop, test, deploy, maintain, and improve microservices; collaborate with product designers, owners, and other engineers; document best practices; fix bugs and refactor code base

Seniority

Mid-level, hands-on IC

Rewrite
## About the role On our path to becoming the most visited online curated marketplace for special objects, our Engineering team is on a mission to deliver the best experience across our platforms by building best-in-class products for search & discovery, bidding, curation, logistics, payments, and support. We're a scale-up with customer-facing challenges dealing with high-scale (75k auctions per week) and high traffic (more than 10 million visitors per month). As a Software Engineer, you'll support one of our 3 verticals - Demand, Supply, or Fulfilment - improving and delivering product innovations for our platform. Working in small, fully autonomous, and highly collaborative Agile teams, you will build scalable, maintainable, and resilient microservices and features. That's why we are looking for bold, curious and open developers! Are you ready to join? ## Responsibilities - Build: Design, develop, test, deploy, maintain and improve. You'll be part of a team that is end-to-end responsible for their own microservices. - Collaborate: Work closely with product designers, product owners, front, back, and mobile engineers to share new ideas and make our processes even more efficient. - Growth: Support our great engineering culture, by documenting and advocating for best development practices - constantly improving the quality of our products by fixing bugs and refactoring the code base where necessary. - Learn: Boost your career by testing new technologies and participating in our Technical Week, a week dedicated to promoting creativity (after 2 product sprints), innovation, and knowledge sharing across domains. ## Requirements - As Software Engineer, you already understand the full life cycle of web development and see opportunities in front of you. You're curious, solution-oriented and have a strong customer focus. Our stack is mainly focused around Ruby, however, if you're passionate about learning new things then prior experience with Ruby is not essential. Next to this: - At least, 4+ years of experience with customer-facing products in related industries, e.g. e-commerce, fintechs, SaaS - At least 4+ years with software development, in specific OOP (object-oriented programming) - Experience designing, implementing, and deploying backend services, with a focus on high availability, low latency, and consistency. - Good understanding of APIs design - Familiarity with SQL and relational databases - Excellent communication in English - Comfortable raising concerns, sharing new ideas, documenting, and finding opportunities for solution alternatives. ## Nice to have - As a passionate engineer, you bring these values to Catawiki: - You strive to be a great team player and don't shy away from new challenges. - You are someone who takes initiative and is ready to jump in and help if needed. - You possess a "growth mindset" in which you take the initiative to further your personal skill set as a software developer, whether by learning new skills and/or technologies or by seeking new opportunities. ## What we offer - Where you'll be: This role is based in Lisbon, Portugal. We offer an excellent relocation package for people living outside of Portugal. - When in Portugal, here is what we can offer you: - You'll be part of an enthusiastic, highly motivated team of 850+ Catawikians. - International and fast-growing organization with over 50 nationalities. - 22 days of Holiday days + National Holidays - Health Insurance - Meal Card per working day on top of salary - Working-from-home Allowance - Hybrid way of working between home and office - Flexible working hours policy - Holistic Wellbeing Programme including: clinical services, single-session therapy, wellness support and more. - Tailored Learning & Development program
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