Job information

$ 55,000 - 65,000 EUR per annum

Job Summary

We are the leading mobile point-of-sale (mPOS) company in Europe, with major offices in Berlin, Sofia, and São Paulo comprising more than 500 people. We started out five years ago and built our payment service from scratch to shake up the industry and wake up the entrepreneur within everyone. We created a unique device that pairs with the smartphone in your pocket, allowing small merchants to accept card payments anywhere. Beyond our original hardware, mobile and web apps, we have gone on to develop a suite of APIs and SDKs for integrating SumUp payments into other apps and services. We recently launched a brand new contactless device, which makes paying by card easier than ever before.

Your impact at SumUp

As part of our vision to become a truly global IT organisation, we have started to build out local, autonomous, cross-functional teams that can take an aspect of our product and perfect it from concept to execution. As Senior Backend Engineer, you will be part of the on of the most strategic teams: Merchants Acquisition - acquisition on all channels, e-commerce and on-boarding experience.

Your role and responsibilities

Be a technical leader within your team.
Participate in API design and implementation for both internal APIs and those exposed to our third-party integrators.
Provide thoughtful and comprehensive documentation and testing for your features before shipping them.
Design, implement, and iteratively improve new backend services.
Maintain and extend existing backend services (written in Ruby or Node).
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.

Job Description

Main requirements
B.S. or M.S. Degree in Computer Science or a related field, or equivalent fundamentals
5+ years of experience in a software engineering role;
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 *
Nice to have
Good working knowledge of message brokers - RabbitMQ, Kafka
Contribution to open source projects or personal projects is desirable
Experience working in an international, distributed team
Responsibility and empowerment from day one.
Competitive compensation and education budget.
Visa and relocation support for a smooth transition to living and working in Berlin.
Participate in our weekly developer events, like Lunch & Learn and Hack Fridays.
Close, welcoming, and international community of 130 people from over 30 countries; we get together regularly for brunches, cocktail nights, football, yoga, German classes, and office parties.
At least one off-site every year, where the tech teams from Berlin, Sofia, and São Paulo gather to hack together. In the past we've gone to Bulgaria and Greece.
Be part of one of Berlin's most exciting startups, on a mission to take over the world.