Kaleem I.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Jul 18, 2026.

𝐎𝐯𝐞𝐫𝐯𝐢𝐞𝐰 Scaling systems without performance bottlenecks is where most products struggle. I’m a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (𝟕+ 𝐲𝐞𝐚𝐫𝐬) focused on designing and building 𝗵𝗶𝗴𝗵-𝘁𝗵𝗿𝗼𝘂𝗴𝗵𝗽𝘂𝘁, 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗴𝗿𝗮𝗱𝗲 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 using 𝐄𝐥𝐢𝐱𝐢𝐫, 𝐆𝐨𝐥𝐚𝐧𝐠, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐚𝐧𝐝 𝐦𝐨𝐝𝐞𝐫𝐧 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐟𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬. My work centers on APIs, real-time systems, and backend architectures that remain stable under load and scale cleanly as usage grows. I’ve built and maintained backend platforms used by 𝐭𝐡𝐨𝐮𝐬𝐚𝐧𝐝𝐬 𝐨𝐟 𝐜𝐨𝐧𝐜𝐮𝐫𝐫𝐞𝐧𝐭 𝐮𝐬𝐞𝐫𝐬 including SaaS products, healthcare systems, and data-driven applications where reliability and performance are non-negotiable. 𝐖𝐡𝐚𝐭 𝐈 𝐡𝐞𝐥𝐩 𝐭𝐞𝐚𝐦𝐬 𝐰𝐢𝐭𝐡 Designing and owning backend architecture from day one Building 𝐟𝐚𝐬𝐭, 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐑𝐄𝐒𝐓 𝐚𝐧𝐝 𝐫𝐞𝐚𝐥-𝐭𝐢𝐦𝐞 𝐀𝐏𝐈𝐬 Handling concurrency, background jobs, and asynchronous workflows Improving performance, stability, and infrastructure efficiency Modernizing legacy systems into maintainable backend services 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Golang (Gin, Echo), Elixir (Phoenix), Node.js (Express, NestJS) 𝐀𝐏𝐈𝐬 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: REST APIs, WebSockets, background workers, microservices 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: PostgreSQL, MySQL, MongoDB, Redis 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬: AWS (EC2, Lambda, S3), Docker, CI/CD pipelines 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: scalable system design, caching strategies, fault tolerance 𝐒𝐞𝐥𝐞𝐜𝐭𝐞𝐝 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 Reduced API response times by 𝐮𝐩 𝐭𝐨 𝟗𝟎% through caching and query optimization Built real-time dashboards (Golang + WebSockets) supporting 𝟏𝟎𝐤+ 𝐜𝐨𝐧𝐜𝐮𝐫𝐫𝐞𝐧𝐭 𝐮𝐬𝐞𝐫𝐬 Migrated legacy enterprise systems, improving delivery speed by 𝟒𝟎% Delivered backend platforms for healthcare and finance with strict performance and reliability requirements 𝐁𝐞𝐬𝐭 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮’𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 A senior full stack engineer to 𝐨𝐰𝐧 𝐜𝐨𝐫𝐞 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 High-traffic APIs or real-time data platforms Long-term, production-focused backend development 𝐍𝐨𝐭 𝐢𝐝𝐞𝐚𝐥 if you only need basic UI changes or short-term frontend tasks. If you need a full stack engineer who focuses on stability, scalability, and clean architecture, let’s discuss your system and requirements.