Yevhen B.

Building and operating SaaS products today requires much more than just writing code. You need stable architecture, scalable infrastructure, AI integrations that work reliably in production, and the ability to move fast without creating long-term technical debt. That’s where I help. I’m a senior full-stack engineer with 31k+ tracked Upwork hours, focused primarily on long-term SaaS products, AI-enabled platforms, CRMs, internal business systems and automation tools. Over the past 9+ years I’ve worked as the lead technical engineer behind multiple revenue-generating SaaS products used by thousands of customers worldwide, handling everything from architecture and backend development to DevOps, scaling, AI integrations and production support. What I can help with: • SaaS architecture & full-stack development • Laravel / PHP / Livewire / JavaScript / Tailwind • AI integrations (OpenAI, Claude, Gemini, AI agents, automation workflows) • Internal tools, CRM & ERP systems • API design & third-party integrations • Linux servers, CI/CD pipelines & DevOps • Legacy SaaS modernization & technical debt reduction • Support workflow automation & AI-assisted systems • Scaling and maintaining production applications What clients value about working with me: • Long-term ownership mindset, not just task execution • Strong focus on maintainability, stability and scalability • Clear communication and realistic technical guidance • Fast execution without sacrificing code quality • Ability to independently manage complex systems and infrastructure I’m most valuable for founders and companies that already have a real business, real users and real operational needs, especially when reliability and long-term maintainability matter. 31k+ Upwork hours • 100% Job Success • Long-term client relationships • Revenue-generating production systems Originally from Ukraine, currently based in Warsaw, Poland. Available across both European and U.S. business hours. If you’re looking for a senior engineer who can take real technical ownership of your product — let’s talk!