Muhammad Tahir

Senior Software Engineer

Fiverr

Apr 2024 - Present • 2 yrs 3 mos

I’m a full-stack developer with 8+ years of experience building and scaling SaaS platforms, API-driven systems, and AI-powered applications. My focus is not just writing code, but understanding the business problem and turning it into a clean, reliable system that actually works in production. I work across Node.js, NestJS, Python, React/Next.js, and databases like PostgreSQL and MongoDB, handling backend architecture, API design, frontend dashboards, and complex integrations. A big part of my recent work has been around AI/LLM systems, using OpenAI, Claude, and similar tools to build automation workflows, data extraction pipelines, and decision-making layers that plug directly into backend systems. For example, I’ve built AI-driven flows where unstructured data (documents, inputs, events) is processed, converted into structured outputs, validated, and then pushed into downstream systems with proper logging and traceability. I focus on making AI systems reliable, with controlled prompts, fallback handling, and cost-aware execution, so they behave consistently in real-world usage. Alongside AI, I’ve worked heavily on integrations like payments (Stripe, Airwallex), third-party APIs, and event-driven systems. I’m comfortable stepping into existing codebases, fixing issues, refactoring backend architecture, and preparing systems for scale without overengineering. One of the platforms I worked on is BidCaribbean (https://bidcaribbean.co), a vehicle auction system where I built React-based frontend flows for listings, filtering, and dynamic pricing, while integrating external data sources and handling real-time updates. I’m used to working independently, communicating clearly, and delivering production-ready solutions. Whether it’s building from scratch, integrating AI into an existing product, or scaling an MVP, I focus on keeping the system simple, maintainable, and ready to grow.