Backend Software Engineer · Dhaka, Bangladesh
I build backend systems — the APIs, the data models, and the business rules underneath them.
I am working toward software architecture and technical leadership — designing systems that stay reliable and maintainable as they grow, and guiding teams through those decisions.
If you build systems too or you are hiring and this looks relevant, I would like to hear from you.
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Epyllion Group · Dhaka, Bangladesh
An HRMS and enterprise business platform being built from the ground up by a small engineering team.
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Echologyx Ltd. · Dhaka, Bangladesh
Distributed .NET Core systems built as microservices.
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Bdjobs.com Ltd. · Dhaka, Bangladesh
recruiter.bdjobs.com and related business applications, including a large body of legacy code.
Catalog, Identity, Ordering, Cart and Payment services built with Clean Architecture, DDD and CQRS. RabbitMQ for inter-service communication and Ocelot as the API gateway. Later refactored to introduce a shared kernel with a consistent error-handling approach, and to organise each service around vertical slices.
Backend service for one-to-one and group messaging over WebSockets with SignalR, covering authentication, room management and conversation management. A small React client was built only to exercise the API.
API for products, categories, authentication, reviews and orders. Built before the microservices version, using Clean Architecture, DDD and CQRS with the Repository pattern.
Contributed to migrating the Bdjobs employer panel job posting system from legacy technology to .NET Core and Angular. I built the API using .NET Core with a layered architecture and the Repository pattern.
Notes on architecture decisions, measurement, and the things that go wrong in production.
A beginner-friendly introduction to the 23 Gang of Four (GoF) design patterns with clear explanations of what they are, when to use them, and GitHub links to practical backend-focused C# examples.
Learn everything about HTTP, from its early versions (HTTP/0.9, HTTP/1.0, HTTP/1.1) to modern advancements like HTTP/2 and HTTP/3. Understand key features, improvements, and how HTTP powers the web today.
Learn to apply the SOLID principles in backend development with practical C# examples for clean, scalable, and maintainable code.
Learn the four principles of Object-Oriented Programming—Encapsulation, Abstraction, Inheritance, and Polymorphism—explained with clear C# examples. Perfect for beginners to strengthen their programming foundations!
Leveraging Vertical Slice Architecture with Clean Architecture for Scalable, Maintainable Systems
I have had the privilege of working with Muhammad Sayyedul Awwab @bdjobs, and I can confidently say he is an exceptional software engineer with a rare combination of technical expertise and business acumen.
Awwab is a professional software engineer who approaches every task with precision and dedication. He has an innate ability to understand product requirements thoroughly, ensuring the technical solutions he develops align seamlessly with business goals. His work consistently reflects a deep understanding of how to fulfill business objectives through the thoughtful application of cutting-edge technologies.
One of Awwab's greatest strengths is his adaptability. He stays ahead of the curve by quickly adopting new technologies, integrating them effectively into his work, and delivering innovative solutions that drive success. Whether it's collaborating with cross-functional teams, debugging complex issues, or delivering scalable and efficient systems, he brings his best to every project.
Awwab is not only a talented engineer but also a reliable and inspiring colleague. I wholeheartedly recommend him to any organization looking for a skilled, forward-thinking software engineer who consistently delivers results.
Mohammad Rafiqul IslamHead of Product, BdjobsI first met Awwab during his interview, where his confidence and technical depth immediately stood out, especially given his two years of experience. In the technical test, he not only completed all mandatory tasks but also tackled the optional ones, quickly learning and implementing new concepts along the way. This demonstrated his dedication to development and his genuine aspiration to become a software architect.
Since joining, Awwab has consistently impressed with his quick learning, strong debugging abilities, and exceptional problem-solving skills. I am confident he will be an invaluable asset to any team, and I strongly recommend him for future opportunities.
Shoaib ShahriarSoftware Developer (.NET / SharePoint), DeloitteI had the pleasure of working with Awwab, and it was truly a great experience. He is polite, easygoing, and a genuine talent with a strong eagerness to learn. His attention to detail and technical depth are highly impressive and very promising.
I especially enjoyed our technical discussions, which were both insightful and engaging. I am confident that Awwab will go far in his pursuit of success.
Rafat AhmadSenior Software Engineer, Astha.ITI had the pleasure of working closely with Muhammad Sayyedul Awwab and learned a great deal from him. He was instrumental in assisting me during my early days at bdjobs, providing invaluable support and guidance. Together, we collaborated on various projects, including the development of the Job postings system for bdjobs' employer site (recruiter.bdjobs.com) and numerous bug fixes.
Additionally, we worked together on a personal Ecommerce project, implementing clean architecture principles. Muhammad is a remarkably positive, honest, and hardworking individual. His optimistic outlook and dedication to his work were truly inspiring.
Mizanur Rahman HriduSoftware Engineer, TechnoNextHiring, a system you want a second opinion on, or something you read here — all welcome. You can also reach me directly at sayyedulawwab@gmail.com.