Backend Developer

👫 Who we’re looking for: A Backend or a Fullstack developer with solid Kotlin experience ready to join a small team building a genuinely creative engineering product in Brno. 🌍 Where? Brno, Czech Republic. 🗓️ When? Q4 2026. ABOUT THE ROLE As a Backend Developer, you will be joining the Creatives team at ROI Hunter, building and owning features across the platform that powers image and video template editors used by enterprise e-commerce clients worldwide. You will work across the creative part of our platform, building new features, fixing bugs, doing refactors and paying down technical debt across a codebase that spans image templates, video templates and a set of around five internal services. You will keep pushing the GenAI features further into the self-served product, including image generation and background removal, replacing manual work with scalable, product-native solutions. You will work closely with the Feed Team and Campaigns Team where the Creatives Team connects to catalog management and ad delivery on Meta, Snapchat and TikTok. A significant portion of what the team ships involves AI-assisted code . You will use those tools every day, and you will be expected to review, understand and own everything you ship. The team is small and the documentation is still catching up with the product. You will need to explore, piece things together and be comfortable figuring out how things work on your own. You will help unify the historically separate image and video codebases, bringing more consistency to a platform that is growing fast and taking on more scope. ABOUT YOU You are a backend developer who takes ownership of what you build and cares about the quality of your output, not just whether it works, but whether it's maintainable and readable by the person sitting next to you. You are comfortable with Kotlin, or you know it well enough that switching from Java feels like a natural next step rather than a leap. You are as passionate about using AI tools in development as we are, and you know the difference between u sing AI to go faster and just letting it write code you can't explain. You own everything you commit. You are a self-starter who can piece together how a system works. The documentation is still catching up with the dynamically growing product, and you are comfortable with that. Being interested in FE technologies is a must in this role. The team values full stack flexibility even if the backend is where you start. Having front-end experience with React and TypeScript already is a great plus! You are based in or near Brno, or open to occasional in-person meetups. The team communicates day to day in Czech. You want to stick around and grow with us and our platform, not jump between projects every few months. OUR CULTURE AND VALUES At ROI Hunter , we deeply value people and relationships , perhaps even more than technology. We celebrate curiosity, initiative, and taking ownership - every voice matters here. Bold ideas are rewarded, and we empower everyone to take ownership and push boundaries. After 10 years in e-commerce, and now as part of Pattern - a global ecommerce accelerator operating across 4 continents - we've learned that genuine innovation thrives in environments filled with mutual respect, trust, and open dialogue. Join us to experience a workplace where impactful work meets meaningful connections. PERKS AND BENEFITS 🌴 25 days of holiday 🤒 3 paid sick days per year 🏠 Work from home allowance 🧗🏻 Multisport card contribution 💆 Free massage or physiotherapy appointment once per month 👩🏻‍🏫 Company wide education budget for your development 🥂 Company and team events (online & offline) …but we still believe the most important thing is the culture we create and live every day. So, what's it like to work with us? WE CARE ABOUT 📈 AUTONOMY AND FLEXIBILITY – We trust each other. Impact and delivered outcomes are more important than spending the whole day in the office with poor results. We can choose the approach and solutions to our work tasks as long as we can deliver the outcomes. To achieve that, we all must be accountable, self-driven and proactive. 📘 LEARNING TOGETHER AND OUR GROWTH – we won't go far if we hide our findings or hoard our knowledge. It’s all about collaboration and discussions. We love feedback . We support each other, as well as our personal development and education based on our job needs. 💡 OPENNESS – Questions? Assumptions? Feel free to ask & be prepared for honest answers. 👐 EACH OTHER – You’ve seen the perks and benefits. But there are times in life when all that matters is just the right person next to you who genuinely cares and is ready to listen over a cup of coffee. And that is what we cherish the most about Hunters. YOUR HIRING JOURNEY WITH US: Intro call with our recruiter. First interview with Adam, your future leader. Backend homework task. Final interview with Adam and one of your potential colleagues. Get the job offer. WHO WE ARE 📌 Start-up originally from Brno, CZ, but now operating worldwide. Helping companies through our Product Performance Management platform with scaling their digital promotions and commercial activities. Being really good at that - influencing every 67th online purchase worldwide, working with major retailers like Adidas, Decathlon and C&A. Learn more in this video . 📌Official partner for the big players - Meta Business & Instagram, Snapchat and Google. 📌Proud employer of over 90 Hunters around 4 continents, 20 nationalities on board. 📌In December 2025, ROI Hunter joined forces with Pattern , a US-based global ecommerce accelerator expanding our portfolio of products from marketplace product placement through dynamic pricing to logistics/warehousing, and of course digital marketing! Do you like what you’ve seen? Apply now & let's learn more about each other! In the meantime, you can get to know us better on our Linkedin and Instagram or check out our people blog on Tribee .💜