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Senior Backend Engineer

Sofia · Engineering

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At SumUp, we are driven to empower small businesses across the globe by de-hassling their lives and helping them to succeed. Our vision as a global FinTech company is to build the first-ever global card acceptance brand, and we are well on our way as small businesses in over 31 countries around the world rely on SumUp to get paid. To get there we are putting together an awesome team that is committed to one another and to our merchants. You could be our missing link! Help us bring card acceptance to the masses!

Our boldness, startup mindset, empathy and love for product foster a creative environment for our employees. We value an entrepreneurial spirit and seek to build lasting relationships among our employees. We know that a diverse and inclusive workforce keeps us competitive and provides opportunities for all. We believe that together we can help small businesses grow. 

Our SumUp office in Sofia is hiring for the position of Backend Developer.

In this role, you'll work with a small cross-functional co-located team to build tools that help hundreds of thousands of small businesses thrive. By shipping code early and often, you'll see the impact of your work on merchant's daily lives right away. You'll collaborate with experts in product, design, and operations to deliver mission-critical internal and external features that power the SumUp ecosystem.

We work on a number of different domains that span technologies, systems, and processes. A few of the technologies we are leveraging on SumUp platform include Ruby, Scala, Node, Erlang, Go, Kafka, Kubernetes and Docker.

Your role and responsibilities

  • Participate in API design and implementation for both internal APIs and those exposed to our third-party integrators.

  • Design, implement, and iteratively improve new backend services.

  • Maintain and extend existing backend services.

  • Collaborate with other software, QA and sysops engineers to ensure smooth deployment, continual operation and support for quality software.

  • Coach and mentor other engineers to increase their abilities and productivity.

  • Actively provide code review feedback to other software engineers, considering both style and implementation.

  • Provide thoughtful and comprehensive documentation and testing for your features before shipping them.

Your profile

  • Experience with one or more of the following languages: Javascript on the Back (Node.js), Ruby (also on the Rails), Erlang/ Elixir, Java / Scala, Golang

  • Experience with microservices architecture and Restful APIs

  • Experience with Git

  • Experience with SQL (PostgreSQL)

  • Experience within Linux/Unix environment (comfortable working with a CLI)

  • Solid OOP and FP skills

  • Solid debugging, optimisation and problem-solving skills

  • Self-motivated, proactive and engaged attitude towards projects

  • Ability to write clear and concise code that your teammates can understand and build upon

Perks/Benefits

  • Responsibility and empowerment from day one.

  • Competitive compensation and education budget.

  • Participate in our weekly developer events, like Lunch & Learn and Hack Fridays.

  • Opportunity to be a partner with SumUp in achieving its goal to becoming the first global card acceptance brand.

  • A startup work environment, passionate, collaborative and results oriented

  • Empowerment of employees to fulfil their role in the organization.

  • Open workspace environment

  • Office relaxation activities such as yoga and massages

  • We get together regularly for brunches, cocktail nights, football and office parties.

  • Team Building activities touring in the different SumUp sites globally

  • 23 days paid vacation + 1 accumulative day for each year of employment at SumUp

  • Additional health insurance

  • Hackathon Events

Apply now!

We're looking forward to meeting our next teammate!

Apply now