• Designed and built backend APIs using .NET 8, PostgreSQL, and Apache Cassandra, integrating with major platforms such as Autodesk, Google, Meta, AWS, and OpenAI, handling terabytes worth of requests.• Mentored and supported a team of 6+ engineers, improving productivity and fostering professional growth through regular code reviews, technical guidance, and hands-on collaboration.• Developed unit and integration tests with xUnit, ensuring comprehensive coverage and minimizing production issues, achieving over 90% test reliability across all services.• Delivered backend solutions for large-scale projects, including data centers, airports, stadiums, and hospitals, optimizing delivery processes to reduce delivery timelines by 30%.• Promoted the use of SOLID principles and best practices to maintain high-quality code, leading to a 40% reduction in technical debt and easier maintainability of systems.

• Design and model backend services utilizing .NET Core 6 and TypeScript, enhancing e-commerce automation and performance for an extensive user base in SQL Server.• Deploy infrastructure using .NET on Azure, integrating algorithms for processing high-volume data from custom REST APIs, supporting millions of daily deliveries.• Establish CI/CD validation and deployment pipelines, ensuring timely and budget-compliant production releases while diminishing bug occurrence at the quality assurance stage by over 90%.• Ensured software reliability by maintaining a bug-per-feature ratio below 1%, exemplifying a commitment to quality in feature development.

• Managed and optimized SQL procedures to maintain and enhance critical business logic, ensuring high-impact functionality for a large user base.• Improved data handling and retrieval efficiency in SQL Server, achieving up to a 120-fold reduction in system load by implementing more efficient algorithms• Collaborated with cross-functional teams to develop and deploy high-quality financial solutions, accommodating rapidly changing legislation for over 200,000 users split among 100+ client companies.• Developed SPAs using AngularJs parallel to .NET Framework 3.5 SP1 MVC backends, leveraging legacy systems to their fullest potential and improving page load times by up to 300%.

• Enhanced and supported a range of legacy back-end services by utilizing .NET Framework, MySQL, and JavaScript/TypeScript, ensuring compatibility across various API versions up to .NET Core 6.• Designed Entity Relationship (ER) models and implemented migrations through Entity Framework code-first approach, successfully deploying to production on four separate projects.• Developed and optimized server-side applications utilizing .NET and Node.js, resulting in enhanced system capacity for concurrent users by 50% and reducing response times by 20%

• Successfully resolved an average of 10 bugs per sprint, maintaining a high level of software integrity and functionality. • Developed and maintained comprehensive documentation, resulting in a 20% reduction in onboarding time for new team members.• Effectively managed merge conflicts in Git, with a resolution rate of 95%, facilitating smooth collaboration and code integration within the development team.• Documented and managed Postman collections for API testing, resulting in a 30% improvement in testing efficiency and accuracy.