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Senior Backend Engineer (Golang) - Global Bank

Sofia, Bulgaria · Backend

SumUp enables businesses to get paid easily, process orders quickly, sell online instantly, and manage their money more efficiently. We create the tools businesses need to make their business and their customer experience thrive!

Joining the Global Bank tribe means you’ll play a key part in helping us build SumUp's own digital bank. You’ll be part of a global, autonomous, cross-functional team that takes an aspect of our product and perfect it from concept to execution. Becoming a part of the Global Bank Tribe means working alongside ~250 people with 32 nationalities across Cologne, Berlin, São Paulo, Santiago, Sofia and Vilnius who love to take ownership, work with purpose, and help businesses thrive.

As a Senior Backend Engineer (Golang), you will be responsible for supporting the transition from a localized setup with regional banks to a unified Global Bank. One of the main challenges will be to support the migration from a monolithic structure to Golang microservices.

We encourage the exploration of new languages and services, empowering our teams to choose the best technology for new projects. Currently, our Tribe is using Go, Kotlin & Java and Elixir; Kubernetes, Terraform, Kafka, Postgres, AWS, and Rest APIs.

What you’ll do

  • Collaborate with other software developers, QAs, DevOps engineers, designers, product managers and other key stakeholders to design and implement backend services and APIs, clarify problems, outline opportunities, prototype solutions, ensure smooth deployment, continuous integration, and support existing functionalities

  • Work in a global context with teams in Europe, the US and Latin America

  • Provide comprehensive documentation and high test coverage

  • Actively participate in selection of new tools, technologies and processes, code reviews and pair programming with other software engineers

  • Help your team deliver business value by taking decisions related to the backend and actively participating in product discussions

  • Build capabilities that bring value to millions of users

  • Constantly adopt and actualize best practices with the team 

You’ll be great for this role if

  • Solid backend experience in Golang 

  • Strong experience in software architecture and application design, with a track record of making architectural decisions and a deep understanding of fundamental system architecture and API design (RESTful and event-driven services)

  • You feel comfortable working with SQL and NoSQL databases

  • You have solid debugging, optimization and problem-solving skills

  • You have experience with CI/CD products such as GitHub Actions, Jenkins, ArgoCD

  • You love to mentor people and share knowledge 

  • You have a passion to write clear, concise and testable code that your team can understand, maintain and improve

Any of the following would be considered a plus

  • Good understanding of modern cloud environments - AWS Prometheus, Grafana, Terraform, Docker, and Kubernetes.

  • You have experience with event streaming platforms and messaging brokers such as Kafka and RabbitMQ 

  • PHP experience 

  • Experience in the fintech industry

Why you should join SumUp

  • We’re a truly global team of 3200+ people from 80+ countries, spread across 4 continents

  • The opportunity to work on large scale fintech products used by millions of businesses around the world

  • You’ll receive 25 days’ paid leave, plus 1 additional day for each year of employment.

  • You can take up to 10 days’ educational leave to expand your skill set.

  • A dedicated annual Learning & Development budget (2000Euro / year) for attending conferences and/or advancing your career through further education

  • Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success

  • Access to the SumUp Sabbatical, our Employee assistance program for mental health

  • We offer additional health insurance, a subsidized Multisport card, free shuttle buses from Joliot-Curie metro station and other great benefits.

  • You’ll attend global offsites and/or hackathons

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate.

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.