Fullstack Mobile Developer (React Native)

Fullstack Mobile Developer (React Native)


We’re looking for an experienced Fullstack Web / App Developer that is able to assume the overarching responsibility for the development of the mobile version of Challengermode’s platform. You will be working with a talented team of hard-working developers, designers, and product managers. 

The role primarily involves end-to-end ownership of the development and deployment of native mobile apps based on web technology for iOS and Android. But also the development of new and existing features, working on performance and scalability improvements, as well as technical design and architecture of the platform and apps more broadly.

The platform has a microservice architecture and is primarily built with web technologies like ASP.NET and React. However, nothing is static, and as tools and frameworks evolve, so do we. To meet current and future challenges we’re always looking for better ways of working, new frameworks to adopt, and we value staying on the cutting edge so long as it serves our goals and leads to better user experiences.

Although we'd like for you to be familiar with these technologies, it's more important that you are not only able to learn and adapt but really want to learn new stuff and adapt to better ways of doing things.


You have worked with mobile/web applications 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. 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. 

  • 4+ years of experience within app, web development and/or software engineering or a comprehensive set of skills and experiences that can attest to your expertise. 
  • Experience in building mobile apps with React Native or similar cross-platform frameworks, as well as publishing to and maintaining apps on the app stores.
  • Experience with building responsive and Progressive Web Apps (PWA).
  • Preferably experience in ASP.NET / C# and a modern Javascript framework like React.
  • You understand what it means to build secure and scalable systems for the modern web.
  • You have an engineering mindset (e.g. problem solving, first principles thinking, understand design, and research e.t.c).
  • Excellent communication skills in both written and spoken English.
  • You have a Computer Science (or equivalent) degree - or the experience to make up for that.

Bonus points if you have:

  • Experience with native mobile app development for iOS and/or Android.
  • A gaming or esports hobby! You watch and/or play esports games. It's easier to create great gaming experiences if you understand the users' needs yourself.


Challengermode offers you a chance to work on a quickly growing esports platform reaching millions of users and tournament organizers globally. At Challengermode, you’ll be a part of a highly ambitious and supportive team that wants to make esports accessible and better for everyone. We believe that it’s important to work hard and reach for the sky and 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?


Employment: Fulltime

Start: ASAP

Or, know someone who would be a perfect fit? Let them know!


Söder Mälarstrand 71
118 25 Stockholm Directions team@challengermode.com +46(0)8 - 121 595 40 View page

Culture & Workplace

At Challengermode, we are strong willed but can always admit when we have been wrong. We are ambitious, curious and never satisfied with mediocrity. And we all share a will to do really cool things together with other really skilled and dedicated people.


Everyone in the team has a strong sense of ownership and believes in the mission. If you enjoy working towards ambitious goals, working hard (and smart) and getting challenged on a daily basis, then you should fit right in!

Already working at Challengermode?

Let’s recruit together and find your next colleague.


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