
Rohlik Group · Prague
COMPANY OVERVIEW Rohlik Group is building the future of online grocery — delivering 25,000 SKUs in under three hours across multiple European markets. But this...
Rohlik Group is building the future of online grocery — delivering 25,000 SKUs in under three hours across multiple European
markets. But this isn't just a logistics problem. We're engineering the shift to agentic-first development, rethinking how
software gets built so we can ship faster without compromising the quality our customers expect.
Our engineers work on problems that sit at the intersection of AI, real-time operations, and consumer experience. Whether it's
driving our warehouses toward lights-out operations, bringing agentic shopping to our web and app products, or building the
internal systems that power one of Europe's fastest-growing grocery platforms — the technical challenges here are real and
unsolved.
100+ engineers across Product Engineering, Platform & SRE, Machine Learning, AI, and Data. We work in compact cells of 3-8 people,
each owning a specific problem with clear KPIs. We're AI-native — Claude Code and Devin are part of our daily workflow, not a
pilot. We ship fast, we build with the best tools available, and we don't hide behind process when we could be shipping.
You'll own the technical direction for one of Rohlik's core domains — from architecture to delivery. This is a staff-plus
individual contributor role: no direct reports, but far-reaching influence across multiple teams and functions.
You'll be the person teams turn to when they're stuck on the hardest problems. You'll shape how systems are designed, how
trade-offs are evaluated, and how we evolve our platform as we scale across markets. You're accountable for ensuring your domain's
systems are architecturally sound, scalable, secure, and aligned with where the company is heading.
You'll also play a key role in embedding AI and agentic practices into the stack and developer workflows — helping us move faster
while keeping quality high. This means driving the adoption of agentic development, championing automation, and ensuring Rohlik
stays on the cutting edge of how modern engineering teams work.
you considered.
authority.
record of shaping its direction.
problems.
great work.
unlimited paid vacation based on trust.
credits to use in our internal cafeteria.
with us?
**This is a remote position open to candidates in Europe and Turkey. For those based in the Czech Republic, a hybrid work model is available. ABOUT US We are a leading product development partner specializing in custom web and mobile application development. With Silicon Valley founders and top-tier European tech talent, we operate from Prague and have successfully delivered over 65 software products for early-stage startups, scaleups, and global enterprises. * Founded in 2016 * Headquartered in Prague * Built and launched 65+ products * 90+ team members * Driving product innovation for leading US companies At OAK’S LAB, we take an AI-first approach, utilizing AI on almost every project. From streamlining design and testing workflows to enhancing developer productivity, our teams leverage tools such as Figma MCP Server, Playwright MCP Server, and Cursor, and we’re actively experimenting with remote AI agents to push the boundaries of what’s possible in product development. OUR PROJECTS Here are a few from our portfolio: * Nasdaq Private Market (Series C, Finance)- nasdaqprivatemarket.com * Blackpoint Cyber (Series B, Cybersecurity) - blackpointcyber.com * OpenLoop (Series A, Healthcare) - openloophealth.com THE ROLE Our product development team is seeking a Senior Full-Stack Engineer who brings creative thinking, problem-solving, and proactive technical expertise to build outstanding web and mobile applications for our clients. You’ll be working on cutting-edge projects, solving challenges that were previously unsolvable without the use of AI We are specifically looking for engineers who have hands-on experience building AI-driven solutions and integrating AI models into production applications. This includes practical experience working with LLM APIs, AI-powered workflows, retrieval systems, or other AI integrations that deliver meaningful value to end users. In this role, you will work within a dedicated product team consisting of the Tech Lead for the specific product, a Product Manager, a Designer, and a skilled team of engineers to drive the product’s success. From engaging in technical discussions to engineering complex features, your involvement spans the entire product development lifecycle. RESPONSIBILITIES * Design scalable, modular, and maintainable architectures for AI-powered applications * Collaborate with product teams to understand feature requirements and translate them into technical solutions leveraging AI models * Integrate APIs (e.g., LLM APIs (e.g. OpenAI), Hugging Face API) into applications for tasks such as NLP and image recognition * Implement prompt engineering, embeddings, and other techniques to customize model outputs without building models from scratch * Implement vector databases in Postgres for RAG * Use tools like Hugging Face’s Transformers to further customize pre-trained models to suit specific project requirements * Optimize server-side logic to ensure efficient querying and integration with AI tools * Work with unstructured data (text, images, etc.) and convert it into model-ready formats * Validate the output quality from AI models to ensure it aligns with business needs and provides value to end-users SKILLS & REQUIREMENTS * 6+ years in engineering * 3+ years of experience in building web solutions using Node.js and React * Experienced with Javascript/Typescript * Hands-on experience building AI-driven solutions and integrating AI models or AI-powered services into production applications * Focus on code quality * Desire to learn new technologies * Strong analytical and problem-solving skills * Proactiveness and the capability to make a difference * Driven, hard work ethic, showing commitment * Ability to work effectively in a team environment, following Agile methodologies * Proficiency in English TECH STACK * TypeScript * Node.js * React + Next.js * React Native * GraphQL, tRPC * Google Cloud Platform * HuggingFace API, LLM APIs (eg OpenAI API), Langchain * Postgres/Vector Databases for RAG Important Notice: OAK'S LAB communication, including interview requests and job offers, are only sent from an "@oakslab.com" or "@oaks-lab.com" email addresses (e.g., john@oakslab.com or john@oaks-lab.com). Any message from a different email domain is not associated with OAK'S LAB. We will never ask for payment information or banking details via email, phone, or any other communication channel during the interview process. If you receive messages using our name, domain, or brand assets in an attempt to impersonate us or act on our behalf, do not engage. Instead, report it to Econsumer.gov at Government Shutdown Notice / Aviso de cierre del gobierno (if you are in the EU), Federal Trade Commission (FTC) at Government Shutdown Notice / Aviso de cierre del gobierno , or the Securities and Exchange Commission (SEC) in case of investment fraud at SEC.gov | Report Suspected Securities Fraud or Wrongdoing (if you are in the US).
We're Tropic Square, a Prague-based company designing open-source secure-element chips. We're looking for a Senior Software Engineer to join our hybrid team and help drive a long-term, open-source project at the intersection of software and hardware in the semiconductor world. You'll own core infrastructure decisions, shape architecture, and grow into a technical leadership role. If you're excited by deep technical problems with real-world impact, this might be the role for you. 👉 WHAT YOU'LL WORK ON * Developing and expanding our automated flows and hardware modelling framework * Building internal tooling and infrastructure that serves both the company and the wider open-source community * Driving architectural decisions and the long-term technical direction of the codebase * Exploring adjacent technical areas (verification, cybersecurity, EDA) as the work demands, with room to go deep where you're curious * Collaborating with internal teams and external contributors in a public, technically demanding setting ✍️ OUR STACK * Mostly Python, Bash, C, and whatever else the job calls for * Check out our Github 💪 WHO YOU ARE * Senior software engineer with a track record of designing and maintaining complex systems * Either you've led a small team and want to keep doing it, or you're a senior IC with the instincts to mentor and steer without formal reports * Background or genuine interest in hardware, EDA, or embedded development * Experience or interest in security. We build in a domain where it's not optional * Comfortable thinking in terms of trade-offs and second-order effects, not just shipping the next feature * At home in a Unix/Linux environment and in open-source workflows (public reviews, issue trackers, async collaboration) 🤝 WHY JOIN US * A rare role where software architecture and hardware reality meet * Direct, visible impact on an open-source project used in real semiconductor development * Hybrid by default: work from the Prague office, remotely, or mix the two, whichever fits your life. We optimize for autonomy and deep focus * In-person team meetups in Prague are held a few times a year for planning and architecture work 👋 Interested? We want to hear from you! Just submit your CV, a brief cover letter, and links to your work. After the initial screening, you'll be directly in touch with your future team.
Your teams own the algorithmic heartbeat of major esports verticals, spanning iconic MOBA titles (Dota 2, LoL) and FPS giants (CS2, Valorant). They manage the entire ML lifecycle—from raw data ingestion and feature engineering to model architecture, rigorous validation, and high-throughput production deployment. While you won't be writing the code yourself, you will serve as the technical anchor who deeply understands this end-to-end flow, ensuring our systems are robust, scalable, and cutting-edge. A critical pillar of your role is high-level strategic alignment. You will act as the key technical bridge between your teams and product managers, infrastructure champions, and domain game specialists, transforming complex technical capabilities into sharp business outcomes and seamlessly integrating domain insights into our modeling strategy. Your Responsibilities Leadership Lead two teams of 4-6 ML engineers and mathematicians, each focused on a different esports vertical (MOBA, FPS). Define team staffing needs and drive hiring across both teams. Manage performance of direct reports. Foster a culture of ownership, accountability, and collaboration. Set the standard for how the teams work with AI tools - lead by example, encourage experimentation, measure and evaluate AI tools and set up impact on delivery. Technical Strategy & Roadmap Partner with senior team members to shape the roadmap; together with a PM ensure alignment with business goals. Review and challenge key high-level technical decisions - model development and validation, ML architecture etc. Work on unblocking the teams - support ML Ops and infrastructure best practices. Evaluate and introduce AI tooling that accelerates model development, validation, and deployment. Delivery & Execution Own the agile delivery process; find a good trade-off between delivery and R&D. Help others break down complex ideas into actionable tasks and research initiatives; drive execution and delivery. Leverage AI tools to accelerate prototyping and iteration cycles. Manage dependencies across teams and represent the teams externally when resolving cross-team initiatives. Skills You Need Individual Contributor Background (4+ years) 4+ years as a hands-on ML engineer. Understanding of model development and validation challenges, pitfalls, and best practices. Practical experience with MLOps. Concrete experience using AI tools to accelerate ML workflows - code generation, prototyping, validation. Manager (3+ years) 3+ years leading a team of 5–10 people focused on ML or mathematical models. Strong communication and collaboration skills - creating a supportive, productive environment. Ability to provide constructive feedback, support growth, and set clear goals. Strong organizational skills - tracking progress across two teams, identifying blockers, ensuring delivery with clear stakeholder insights. Bonus: Industry Experience Experience in betting, quantitative finance, trading, or sports analytics is a significant advantage. Haven't we caught you yet? Help us maintain our position as the No. 1 esports analytics company. Imagine a culture that embraces change and quickly adapts to global opportunities. Experience immense potential for personal growth while contributing to an innovative team. Work remotely or in a hybrid style – whatever suits you best. Enjoy our brand new Norse-myth-inspired offices in Prague. Improve your English with company-sponsored language courses. Participate in quarterly team-building activities to bond with your team. Benefit from a sponsored Multisport card.