Abu Saleh M

Senior Lead Software Engineer

Upwork • Freelance

Dec 2017 - Present • 8 yrs 9 mos

• Lead 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, from business requirements and system architecture to development, deployment, optimization, and maintenance. • Design 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲𝘀, REST APIs, database structures, and distributed services for production applications. • Take ownership of 𝗺𝗮𝘁𝘂𝗿𝗲 & 𝗹𝗲𝗴𝗮𝗰𝘆 𝗰𝗼𝗱𝗲𝗯𝗮𝘀𝗲𝘀, troubleshooting complex issues, improving performance, refactoring safely, and modernizing systems incrementally. • Build and maintain production applications using 𝗣𝗛𝗣, 𝗟𝗮𝗿𝗮𝘃𝗲𝗹, 𝗡𝗼𝗱𝗲.𝗷𝘀, 𝗡𝗲𝘀𝘁𝗝𝗦, 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗚𝗼, 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁, 𝗥𝗲𝗮𝗰𝘁 & 𝗡𝗲𝘅𝘁.𝗷𝘀. • Design and implement 𝗵𝗶𝗴𝗵-𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 using MySQL, PostgreSQL, MongoDB, Redis, RabbitMQ, caching, queues, and asynchronous processing. • Develop 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀, including RAG-based systems, LLM integrations, AI Agents, and Agentic AI automation workflows. • Integrate 𝗔𝗜 𝗰𝗮𝗽𝗮𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀 into existing business platforms to automate workflows and improve operational efficiency. • Work with 𝗔𝗪𝗦, 𝗗𝗼𝗰𝗸𝗲𝗿, 𝗖𝗜/𝗖𝗗, 𝗡𝗴𝗶𝗻𝘅 & 𝗰𝗹𝗼𝘂𝗱 𝗶𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 to deploy and operate production systems. • Perform 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗿𝗲𝘃𝗶𝗲𝘄𝘀, 𝗰𝗼𝗱𝗲 𝗿𝗲𝘃𝗶𝗲𝘄𝘀, 𝗱𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴, 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 & 𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁𝘀. • Collaborate directly with clients and stakeholders to translate business requirements into 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹, 𝗺𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 & 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀. • Completed 𝟱𝟬+ 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 & 𝟮𝟱,𝟬𝟬𝟬+ 𝗵𝗼𝘂𝗿𝘀 of professional software development, working across diverse business domains. 🚀 https://www.upwork.com/freelancers/~0144413bdd55c4bd39

Full-Time Senior Full Stack

American Discount Vacations • Freelance

Jul 2023 - Aug 2025 • 2 yrs 1 mo

• Developed and maintained a large-scale travel and vacation booking platform serving real customers and handling production transactions. • Worked on cruise, vacation, hotel, and travel search and booking workflows, including complex search and availability requirements. • Built and maintained REST APIs and backend services supporting booking, reservation, customer, and travel-related functionality. • Worked extensively with PHP, Laravel, MySQL, JavaScript, and modern web technologies across the platform. • Improved application performance, database queries, reliability, and maintainability while working with an established production codebase. • Integrated third-party travel and business APIs and worked with complex external data and booking workflows. • Troubleshot and resolved production issues, ensuring the platform remained stable and available for customers. • Collaborated directly with stakeholders to understand business requirements, implement new features, and improve existing functionality. • Contributed to the continuous modernization and improvement of a mature production platform without unnecessarily disrupting existing business logic.

Full Stack Engineer

LinkedIn • Fulltime

Jun 2020 - Jun 2021 • 1 yr

• Architected a high-performance REST API Engine for a Digital Wallet ecosystem, ensuring sub-second latency for transactions. • Developed and scaled a robust e-commerce platform, managing complex product catalogs and secure checkout workflows. • Built enterprise-grade administrative portals featuring real-time data visualization and automated reporting. • Enhanced system security by implementing critical patches and compliance protocols to protect sensitive financial data.