
SatoshiLabs · Prague
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 an...
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.
curious
formal reports
and deep focus
👋 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.
ABOUT THE ROLE We're looking for a Software Engineer to join our customer-focused development team. At Rossum, we're revolutionizing data automation with cutting-edge AI technology, using AI agents that read documents, capture and validate data, and streamline workflows. You'll be instrumental in implementing and designing powerful integrations and creating solutions that truly add value for our customers. Your work will directly influence the stability, performance, and seamless functionality of customer solutions and their experience with our platform. You'll also enable internal teams and partners to use the platform more effectively through the development of various tools. WHAT YOU’LL DO YOU'LL HELP US WITH THE FOLLOWING QUESTIONS AND CHALLENGES: * How can we build and maintain robust integrations that seamlessly connect our AI agents with diverse external systems like ERPs and CRMs? * What are the most effective ways to leverage REST APIs, AWS Lambdas, and various databases to create highly reliable and efficient customer solutions? * How can we ensure the solutions we build are not only performant and stable, but also empower internal teams and partners to use our platform more effectively? YOU'LL BE RESPONSIBLE FOR: * Creating Impact: Building and maintaining solutions that connect systems, delight customers, and drive tangible results. * Collaborating: Working closely with solution architects to design solutions that align with customer needs and system architecture. * Owning Your Work: Taking responsibility for the maintenance and support of the code you build, ensuring reliability and efficiency. * Ensuring lifecycle ownership: Confidently handling monitoring, CI/CD, issue resolution, and automated testing for your solutions. Our development team thrives on being quality-focused, value-driven, and curious, with an agile mindset. In this role, you'll directly contribute to Rossum's mission by making our customers' operations faster, smarter, and error-free, ultimately eliminating manual tasks and driving business efficiency worldwide. You'll work closely with solution architects to design effective solutions, and your work will enable internal teams and partners to leverage the platform more effectively through various tools you develop. You'll also have the opportunity to implement groundbreaking integrations and develop solutions that directly enhance our customers' experience with our highly innovative AI platform. OUR TECH STACK: We’re a tech-driven company with a modern stack, and we’re excited for you to bring your skills to the table: * Python: Build robust connectors and solutions using Flask, FastAPI, and AWS Lambdas. * REST APIs: Integrate systems with secure and efficient protocols. * Databases: Work with MongoDB, PostgreSQL, and manage state effectively. * Monitoring & Logging: Utilize Prometheus, Grafana, and ELK stack to ensure top-notch performance. * CI/CD: Leverage GitLab pipelines to streamline development processes. WHO YOU ARE We seek talented software engineers eager to develop robust, scalable, and impactful solutions who possess: * Experience in Python: Skilled in creating and maintaining integrations between systems. * Technical Expertise: Familiarity with REST APIs, AWS Lambdas, and databases (both NoSQL and relational). * Lifecycle Ownership: Confidence in monitoring, CI/CD, issue resolution, and automated testing. * Agile Mindset: Proven success working in fast-paced, agile environments. * Personal Qualities: You are quality-focused and value-driven, curious and eager to learn, and open-minded with “strong opinions, weakly held.” WHAT SUCCESS LOOKS LIKE * Within 3 Months: You’ve comfortably found your feet within the Rossum ecosystem and started building relationships across the team , all while celebrating your first major milestone—successfully delivering your first real customer task or project. * Within 6 Months: You’re confidently taking the lead on your core responsibilities and identifying areas for strategic improvement , while actively contributing to the development of our internal tools. * Within 12 Months: You are recognized as a true go-to subject matter expert within the team —not only mastering our codebase and integrations, but also seamlessly navigating the global Coupa ecosystem to help scale Rossum’s mission worldwide using our new global resources. WHY JOIN US? At Rossum, we’re on a mission to free the world from boring manual data entry. Our AI platform helps companies save millions of hours, allowing professionals to focus on creative, impactful work. In an exciting move for our future, we have joined forces with Coupa, the world’s leading unified platform for Business Spend Management. By combining Rossum’s cutting-edge document AI with Coupa’s global ecosystem, we are uniquely positioned to redefine how businesses operate at a massive scale. You can read more about this exciting milestone and our shared vision in the official announcement here. WHAT SETS US APART? * Cutting-edge AI technology reshaping how businesses operate globally. * A collaborative, supportive environment where autonomy thrives. * Opportunities to grow in a fast-scaling company. * A culture that values diversity, empathy, and genuine connection. As part of the Coupa family, you’ll enjoy: the agility of a fast-moving, innovation-focused team with the stability and reach of a global market leader. For you, this means an even greater opportunity to make an impact, access new global markets, and grow your career within a collaborative culture that values autonomy, diversity, and genuine connection. Together, we’re not just automating data—we’re giving time back to the world’s professionals. WHAT WE OFFER (BENEFITS) * Work-Life Harmony: 5 weeks of vacation, 5 sick/personal days, and a Birthday Day Off to celebrate you. For new parents, we offer an extra 18 weeks of fully paid Maternity leave and 8 weeks of fully paid Paternity leave. * Flexibility: Hybrid work model with flexible hours—find the balance that works best for you and work how you work best. * Tech & Setup: High-end laptop (MacBook) and tech setup. We also support you with personal development, including language lessons (English & Czech, on all levels). * Community & Well-being: Wellness Days (company-wide days to unplug, reset, and recharge), MultSport cards, regular team offsites, and meetups, in a friendly, ambitious team environment. Ready to make an impact in your next role? Apply now!
Finance at Rohlik is being rebuilt to run on AI. We already have agents in production that chase overdue payments, process invoices, allocate cash and clear the team's inbox. The pieces work. What we need now is one person to own the whole thing and make it deliver at scale. ROLE OVERVIEW This is a new role that owns how AI and automation reshape of the finance operating model across the Group. You will take a programme that is already live across procure to pay, order to cash and our shared services centre, and turn it from a set of promising experiments into the way finance actually runs. You report to the Group CFO. You inherit a small team and a live roadmap, and you own the result. You decide what gets automated first, you build and ship with AI tools when that is the fastest way, and you hold every workstream to a number. The role is deliberately hands on. You should be close enough to the work to build an agent or connect two systems through an API with AI assistance, even though you are not a software developer. You should also be senior enough to redesign how finance works and bring the rest of the business with you. WHY THIS ROLE IS EXCITING * You’ll inherit a live AI programme with real agents, real data and real impact from day one — not a greenfield slide deck. * You’ll shape how Finance actually runs across the Group as we move toward the next stage of growth — including the journey toward IPO readiness. * You’ll have access to a top-notch AI-first tech stack and the freedom to use it pragmatically. * You’ll work directly with the Group CFO, with fast decisions and no corporate red tape. * Your good ideas will be implemented almost immediately — not parked in a roadmap waiting for HQ approval. * You’ll lead a small team, but this is not a “manager from a distance” role. It’s highly hands-on, high-impact, and built for someone who wants to make things move fast. WHAT WE EXPECT FROM YOU * Own the AI and automation agenda across finance, from strategy through delivery to measured impact. * Lead process redesign the right way: map and understand the as-is, then design an agentic-first to-be rather than automating the old steps. * Bring the live programme to its targets, with a clear owner, baseline and deadline behind every workstream. * Redesign core finance processes around AI and agents, starting with close, reporting and forecasting. * Build and ship yourself when it is faster, using AI assisted tools to create agents and connect systems such as NetSuite, Rossum and n8n. * Lead and grow the team (three today) and raise AI fluency across finance and the SSC so the business can use what you build. * Track what matters and report it straight: automation rate, close time, cash allocation speed, cost and effort taken out. * Roll out across our five markets, balancing local reality against one Group standard. WHAT WE LOOK FOR You have probably spent time in strategy consulting or in a transformation role, and you are now genuinely excited by what AI can do. You are a sharp generalist who can walk into a messy process, find the real problem, and fix it. You are as comfortable in a CFO pre-read as you are in the AI first tool building the thing. * A track record of leading transformation or automation programmes that actually delivered. A consulting, operations or generalist operator background all fit. * Hands on with AI. You can build agents and integrate APIs with AI assistance. You are not a software engineer and you do not need to be, but the tooling does not scare you. * A good grasp of how a finance function runs, or the speed to learn it fast. * You set baselines, name owners, hit deadlines, and say so early when something slips. * You can lead a small team and still do the work yourself. * You prioritise by impact and move fast. Better done than perfect. * You bring finance, tech and operations along with you. * Fluent in English. Czech is not required, but is an advantage. WHAT’S IN IT FOR YOU * Fair reward - You’ll get a strong fixed salary — no bonus games, no politics. Great work is rewarded clearly and fairly. * Good food every day - You’ll enjoy a free lunch every day and fresh fruit & veggies in the office. Because good food fuels great work. * Life, not just work - You’ll have real flexibility – three days in the office, 2 days Home Office where it suits you. And unlimited paid vacation based on trust. * Personal growth - You’ll grow as fast as Rohlik does. Every challenge is a chance to learn and make an impact. * Real impact - What you do here matters. You’ll see your work changing how people eat and live — from day one. * Recognition among colleagues - Your effort won’t go unnoticed. You can recognise others (and be recognised) through peer credits to use in our internal cafeteria. * Xtra membership - You’ll get free Xtra membership and 10% cashback on everything you buy on Rohlik.cz. * Sport & wellbeing - You’ll stay active with company sports challenges or a subsidised Multisport card. * A team that sticks together - You’ll work with people who move fast, support each other and celebrate wins together. * If this sounds like you…You’re someone who takes ownership, acts fast and gets things done. Ready to bake something great 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).