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Senior Frontend Engineer - Online Payments

Sofia, Bulgaria · Frontend

SumUp’s Online Payments tribe enables merchants to offer state-of-the-art payment solutions for their online businesses. This tribe plays a key role in working towards SumUp’s vision of operating a 360° full-cycle payments solution provider.

As a Senior Frontend Engineer in this green-field tribe, you'll work with a cross-functional, co-lead team to build the client-facing side of our new global online payments platform from the ground up. You’ll drive the implementation of features and ensure they contribute to a great user experience and bring value to our growing customer base. You’ll also share your expertise to help us optimize product discovery and delivery.

What you’ll do

  • Lay the foundation of our new online payments platform, working with a modern tech stack built on React, Emotion (CSS-in-JS), Jest, and React testing library

  • Follow UI design best practices to contribute to our component library Circuit UI, not only to help your fellow devs in the company build consistent features, but also to give your input to the open-source community

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

  • Coach and mentor other engineers to further develop their professional and interpersonal skills

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

You’ll be great for this role if

  • You have an in-depth understanding of JavaScript and DOM-related concepts.

  • You have 5+ years’ relevant experience in agile large scale ecosystems and first-hand experience in mentoring. 

  • You’re an expert in building SPA applications with React.

  • You are experienced in using a component-oriented approach and thinking in a reusable way.

  • You have hands-on experience with implementing highly-responsive UI designs.

  • You have a good understanding of UI and unit testing concepts.

  • You have a quality-first approach, and are familiar with engineering and design best practices to write clean quality code.

  • You’re able to communicate fluently in English about various technical topics.

Any of the following would be considered a plus

  • You have a full-stack mindset and are open to learning other technologies which are not constrained to web development.

  • You are familiar with Docker and/or Kubernetes (or willing to learn).

Why you should join SumUp

  • You'll work on a product with impact on millions of merchants across Europe.

  • 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.

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

  • You’ll participate in weekly Lunch and Learn sessions, where ideas are shared and discussed over company-sponsored lunch.

  • 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're creating tools that 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. 

Want to get more insights about SumUp? Don't miss to visit us on our blog on Medium, or check our social media pages on Facebook, Twitter and LinkedIn.