Rimthan is a Riyadh-based corporate venture builder driving Saudi Arabia’s digital transformation in line with Vision 2030. We launch and scale innovative digital ventures across the Middle East.Our Polish delivery hub is a key part of this journey - a dedicated engineering powerhouse combining European technical excellence with startup agility and enterprise-grade standards. Together, we build impactful products that reach real users, fast.If you’re a Backend Tech Lead with extensive experience in banking who loves Node.js, banking system integrations, and AI-enhanced development tools, we’d love you to join our team and guide the creation of next-generation AI-powered financial solutions.What you’ll do as a Backend Tech LeadCode smarter and ship faster with Claude Code, Cursor/Windsurf, and any ingenious tools you bring to the team.Design and build robust banking APIs, financial microservices, and secure server architectures in Node.js.Develop our AI-native platform for developers, with your feedback and features feeding directly into the product roadmap.Collaborate remotely with frontend developers, designers, PMs, and engineers across Poland and Saudi Arabia on multiple ventures simultaneously.Own the backend lifecycle: architect, implement, optimize, monitor, and scale.Champion best practices in banking API design, financial data security, compliance, and DevOps automation.You might be a good fit if youHave 10+ years of professional experience building production Node.js applications, including banking system integrations, payment processing, or financial APIs.Are fluent with banking protocols (ISO 20022, SWIFT, Open Banking APIs), payment gateways (Stripe, PayPal, Adyen), and financial data formats.Have proven experience with core banking integrations, PCI DSS compliance, financial transaction processing, and regulatory requirements (PSD2, GDPR).Are experienced with databases (PostgreSQL, MongoDB, Redis), cloud platforms (AWS, GCP, Azure), and modern backend architectures (microservices, serverless, event-driven systems).Understand financial system scalability and can design secure systems that handle high-volume transactions and sensitive financial data.Have hands-on experience with regulatory compliance in fintech environments and a strong understanding of financial industry security standards.Have already experimented with Claude Code or other AI pair-programming tools - and can’t imagine coding without them.Master modern JavaScript/TypeScript, secure coding practices, encryption, fraud detection systems, and financial data validation.Communicate confidently in English; Polish is a bonus, as many teammates are based in Poland.Thrive in fast-paced, ambiguous environments where switching contexts and wearing multiple hats is part of the fun.Believe in craftsmanship - automated testing, clean architecture, security best practices, and performance optimization come naturally to you.Why You'll Love Working with UsAI at the Core - We’re not just using AI; we’re building AI tools that make developers 10× more productive - and you’ll be a key contributor.AI Tools Included - Claude Code on the highest plan, available for both work and personal use.Remote-First Freedom - Work full-time remotely from anywhere in Europe, with flexible hours and a culture focused on outcomes, not clock-watching.Startup Energy + Venture-Studio Stability - Tackle new ideas every quarter with the backing of an established venture builder.Competitive B2B Compensation - depending on experience, plus a dedicated learning budget.Paid Time Off - 20 days of paid vacation per year for rest and recharging.Continuous Growth - Access conferences, AI workshops, and internal hackathons to keep your skills razor-sharp.Friendly, Multicultural Team - Collaborate daily with passionate engineers and product folks who love clean code, good memes, and sharing knowledge.Sound like your kind of challenge? Let's build AI‑powered banking systems the world hasn't seen yet!