Senior Full-Stack Software Engineer

It's a new day with a new opportunity at 8am!  About the role: We are looking for a Senior Full-Stack Software Engineer to help design and build scalable systems that power our products and platform. In this role, you will contribute to architectural decisions, lead key technical initiatives, and collaborate closely with product and design teams to deliver high-impact features. You’ll work across the stack, help improve engineering practices, and support the growth of other engineers while solving meaningful technical challenges at scale. If you’re motivated by building reliable systems, tackling complex problems, and partnering closely with product and design to deliver impactful solutions, you’ll thrive in this role. This role is hired through an Employer of Record (EOR) partner in the Czech Republic. About us: At 8am, our vision is to power a world where professionals thrive. We start every day on a mission to empower professionals with the most trusted, innovative technology to deliver world-class outcomes for their clients and exceptional financial results for their business. They count on our purpose-built solutions to simplify operations, ensure compliance, and fuel profitable growth, so they can focus on their clients and do more of the work that matters. Founded in 2005, 8am™ (formerly AffiniPay) is the professional business platform built to help legal, accounting, and other client-focused professionals run stronger, more profitable businesses. Today, more than 250,000 professionals across the U.S. trust 8am to help them work smarter, serve clients better, and unlock their full potential. We have been recognized as one of Inc 5000’s fastest growing companies in the U.S. for 13 years in a row, and as a result, our teams continue to grow as well! What you'll do: Design and build scalable web applications using modern backend and frontend technologies (e.g., Rails, Node.js, React, or similar frameworks) Develop and maintain APIs and backend services that support product functionality Build reusable frontend components and contribute to shared UI libraries Improve and modernize existing systems to enhance performance, scalability, and maintainability Collaborate with product and design teams to translate business requirements into technical solutions Mentor engineers and support the professional growth of teammates Participate in architecture discussions and contribute to technical decision-making Support reliable deployments by debugging issues and collaborating with DevOps and QA teams Participate in sprint planning, grooming, and retrospectives Contribute to improving engineering standards, tooling, and development practices About you: Strong experience designing and building production web applications Experience working across both frontend and backend systems Experience with modern web frameworks (such as Rails, Node.js, React, or similar technologies ) Experience building APIs and backend services Solid understanding of relational databases and SQL (e.g., PostgreSQL, MySQL) Strong understanding of software design principles and maintainable system architecture Experience working in Agile development environments Experience mentoring engineers or providing technical guidance Strong communication and collaboration skills Ability to work effectively with distributed teams Preferred location: Brno, Czech Republic Nice to have: Experience building scalable Software-as-a-Service (SaaS) applications Experience with modern frontend frameworks such as React, Next.js, or similar Experience with backend frameworks such as Ruby on Rails, Node.js, or similar Experience with cloud platforms (AWS, Google Cloud Platform, etc.) Experience with observability, monitoring, or performance tuning Experience working with experimentation or analytics tools Why join our new 8am Brno hub? Founding Team Impact: Be a founding engineer of our new Brno R&D hub. After a brief 1-6 month integration with U.S. based teams, you will help form fully autonomous, locally-led squads with clear paths to Staff and leadership roles with the exciting opportunity to collaborate face-to-face with your team in our upcoming Brno office. Drive our "AI-First" Transformation: We are building a secure, massive-scale "Unified AI Platform". Depending on your squad, you will either help architect this core infrastructure (LLM routing, RAG, agent orchestration) or build directly on top of it. Build the Next Generation of Our Platform: Help shape the systems powering products used by more than 250,000 professionals. You’ll work on complex platform capabilities across payments, workflow automation, and AI-powered features as we expand into new professional service markets. Benefits and Perks We offer a competitive, locally relevant benefits package designed to support your life in the Czech Republic while giving you access to global opportunities: Flexible Time Off (FTO) and 13 paid public holidays aligned with the Czech calendar Paid sick leave with additional support through the Czech social security system Maternity, paternity, and parental leave in line with Czech regulations, plus additional paid paternity leave from 8am Full statutory benefits , including public health insurance, social security, pension, and work accident coverage Possible performance bonus opportunities in the future and employee referral rewards Grow Your Career Access to Coursera (including Gen AI Academy) and ongoing professional development Clear growth paths, regular feedback, and opportunities for advancement What Makes 8am Different: International company environment with collaboration across Europe and the U.S. Opportunities to travel for company events (including potential U.S. visits) Engaging team culture with local events, outings, and community initiatives High-quality company swag and programs focused on wellness, lea