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Kotlin Developer

Role overview

Qualifications

  • 1+ years of experience with Kotlin
  • Good understanding of backend fundamentals and interest in learning cloud distributed systems
  • Familiarity with API design (REST/GraphQL/gRPC)
  • Some experience deploying code to cloud (AWS/Azure/GCP) or strong interest in learning

Responsibilities

  • Build and maintain backend services in Kotlin for our product platform
  • Design and implement interfaces between internal components and public clients (REST/gRPC/Kafka)
  • Implement new features end-to-end together with the team
  • Help improve reliability and performance with guidance from the team

Key facts

  • Remote from: Czechia
  • Freelance
  • Junior (1-2 years)
  • Kotlin Developer
  • Czech

Hard skills

About the company

Oddin.gg logo

Oddin.gg

Sports Betting & iGaming

Oddin.gg is the number one B2B choice for esports betting, enabling the growth of its partners by providing an engaging esports betting experience through its end-to-end esports betting ecosystem. Oddin.gg’s clients benefit from its multi-award winning esports odds feed, risk management, iFrame solution, widgets, 24/7 content, live esports data, and marketing services. The company maximizes its partners’ profitability by combining automated infrastructure and machine learning algorithms with advanced data science. Oddin.gg powers solutions for Betsson, Betway, Yolo Group, Stake, OpenBet, Vibra Gaming, Betby, and many more sportsbook and platform providers on a global scale. Oddin.gg is licensed in New Jersey, Colorado, West Virginia, Ohio, Arizona, Maryland, US, and Ontario, Canada, and is in the process of acquiring multiple more licenses in North America. Our mindset Born from a deep understanding of esports and a burning desire to build something meaningful, Oddin.gg was founded in 2018 with a singular goal: to transform our experience and adventurous spirit into something bold, exciting, and lasting. Since day one, we've been driven by curiosity, ambition, and a relentless pursuit of excellence. We're not just building a company; we're creating an environment where talented people come together, prioritize delivery, get things done, and take full ownership. Here, focus, accountability, and teamwork aren't just buzzwords—they're the very pillars of how we operate. We champion those who take initiative, care deeply about their impact, and know how to enjoy the process. Because when our people thrive, Oddin.gg truly soars. Oddin.gg is growing—and fast. In just a few years, we've exploded from 50 to nearly 300 team members, and we're not hitting the brakes. We're launching new verticals, evolving our processes, and unlocking fresh opportunities for our people to learn, experiment, and shine.

Company details

IndustrySports Betting & iGaming
Company size201 - 500

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Job description

About Valka.ai

Valka, a visionary spin-off from the Realms Group (the parent company of Oddin.gg), is on a mission to revolutionize the way people create and experience digital content. Our team believes that content shouldn’t just be consumed; it should be co-created in real time, blurring the lines between imagination and reality. By harnessing the power of cutting-edge AI, we aim to build an interactive human-digital platform where virtual characters respond dynamically to each user’s voice, text, gestures, and more.

This is your chance to join a diverse group of innovators who are driven to redefine what’s possible in generative content. Together, we’re changing the paradigm from passive viewing to active participation, unlocking new creative frontiers across gaming, entertainment, education, and beyond.


What You Will Be Doing
  • Build and maintain backend services in Kotlin for our product platform
  • Design and implement interfaces between internal components and public clients (REST/gRPC/Kafka)
  • Implement new features end-to-end together with the team (design discussion → implementation → rollout)
  • Develop backend for our landing page, with interactive gamification features
  • Work with machines in our data center, as well as cloud platform on AWS
  • Help improve reliability and performance (monitoring, caching, availability) with guidance from the team
  • Be part of a collaborative, cross-domain product team, closely cooperating with other Kotlin developers, as well as AI specialists.
  • Learn and grow through pairing, code reviews, and mentoring
  • Skills you need

    • 1+ years of experience with Kotlin
    • Good understanding of backend fundamentals and interest in learning cloud & distributed systems
    • Good understanding of backend fundamentals and willingness to learn modern tools for content-based applications
    • Familiarity with API design (REST/GraphQL/gRPC)
    • Some experience deploying code to cloud (AWS/Azure/GCP) or strong interest in learning
    • Knowledge of Docker and basic infrastructure (a plus)
    • Terraform or Kubernetes experience (a plus)
    • Familiarity with Agile development practices
    • Interest in esports (a plus!)
      By applying to this position, you consent to Valka.AI s.r.o., ID No.: 231 32 221, Pod dráhou 1637/6, Holešovice, 170 00 Praha 7, Czech Republic together with it's subsidiaries processing your personal data under Regulation (EU) 2016/679.   Your data will be processed for recruitment and may be retained for up to 3 years for similar job opportunities.
    Rights: Access, correct, delete, restrict, or object to processing; withdraw consent via soulforge@valka.ai; or complain to www.uoou.cz.

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    MR

    Marcus Rivera

    Chief Revenue Officer

    m.rivera@company.com
    linkedin.com/in/marcusrivera
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