Senior Backend Engineer


We’re looking for a Senior Backend Engineer to Challengermode that will become a central contributor to the design, development, maintenance, and operation of the web platform’s backend and APIs. You will be working with a talented team of hard-working developers, designers, and product managers. 

The role involves the development of new and existing features, working on performance and scalability improvements, technical design and architecture, and ongoing training and mentorship of other team members. To meet current and future challenges, we’re always looking for better ways of working, new frameworks to adopt, and value staying on the cutting edge so long as it serves our goals and leads to better user experiences.

The platform has a microservice architecture and is primarily built with web technologies like .NET and React. However, nothing is static, and as tools and frameworks evolve, so do we. Although we'd like for you to be familiar with these technologies, it's more important that you're not only able to learn but motivated to figure out new and better ways of doing things.

Who you are

You have worked with large web applications, APIs, and large databases in the past and have the scars and experiences to show for it (i.e. a proven track record). You enjoy learning about new technologies and are experienced enough to be able to assess the relative merits of different frameworks and technologies. 

To be successful at Challengermode, it’s necessary that you’re a self-starter, can take initiatives, and have a solution-oriented mindset. You’ll receive a lot of responsibility but also a lot of freedom. We often say “don’t ask for permission, ask for forgiveness” because we trust people’s judgments and we want to move fast. You should be someone who enjoys having a lot of autonomy and ownership as you will be wholly trusted to do your job - just like you can rely on all your teammates to do theirs.  

  • Preferably 5+ years of professional software development experience or a comprehensive set of skills and experiences that can attest to your seniority. 

  • You are specifically experienced in modern .NET or similar frameworks for the web such as Play.

  • You have experience building web-scale applications and can do consistency-availability tradeoffs in your sleep.

  • You apply system design tradeoffs* in a principled manner and are both able and willing to explain your reasoning. *(tradeoffs between e.g. performance, durability, availability, consistency, initial costs, running costs, etc.)

  • You have a Computer Science (or equivalent) degree - or the experience to make up for that.

  • Deep knowledge of high-performance techniques such as actor frameworks, CQRS, or highly available stateful services would impress us.

  • Excellent communication skills in both written and spoken English.


Challengermode offers you a chance to work on a quickly growing esports platform reaching millions of gamers and tournament organizers globally. At Challengermode, you’ll be a part of a highly ambitious and supportive team on a mission to make esports easily accessible for everyone. 

We believe that it’s important to work hard and reach for the sky but we also believe it’s more fun to do so with friends and people whose skills you can rely on. Everyone in the team is equally adept at working in a team setting as they are working individually. Prestige is nowhere to be found in our company, everyone can talk to everyone - we’re happy to listen. If you think you have what it takes, we want to hear from you!


  • High performance, skilled and goal-oriented colleagues

  • A fun, friendly, and inclusive work environment

  • Hands-on, freedom-with-responsibility environment

  • Opportunities for personal growth with varied responsibilities and tasks

  • Competitive Salary

  • Stock options (after 6 months employment)

  • Newly refurbished office located in central Stockholm

  • Did we mention that playing computer games is part of the job?

Location: Head office, Stockholm (you should be located in Europe or willing to move to Stockholm).

Employment: Permanent

Start: ASAP


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