I’m looking for a .NET developer role where I can build scalable applications using modern technologies, follow best practices like clean code and testing, and work with a collaborative team while continuing to grow my skills.
MT
Looking for a job
Mark Harold Tamesis
@markharoldtamesis
Senior software developer specializing in scalable .NET microservices and REST APIs, delivering performance and UX improvements.
PhilippinesWhat I'm looking for
I’m a Senior Software Developer focused on building robust, scalable web applications and services with the .NET ecosystem. I turn business requirements into efficient software solutions, owning the full software development lifecycle from requirements gathering and design through coding, testing, and deployment.
At GHD Group, I developed and implemented production web applications using C#/.NET, collaborating with cross-functional teams to streamline processes and reduce costs. I optimized database queries and improved data retrieval times by almost 40%, built RESTful APIs supporting over 500,000 concurrent users, and created reusable components that reduced development effort by 50%. I also strengthened team quality through code reviews and test-driven practices with NUnit/unit testing.
Previously at Grundfos, I worked on microservices and reactive architectures for real-time digital services (IoT and intelligent pumps) as part of SAFe and Scrum teams. I designed, developed, debugged, and tested scalable services using .NET/C# and CQRS/clean architecture approaches, and I maintained DevOps configuration and CI/CD pipelines to support reliable releases across distributed teams.
Earlier roles strengthened my breadth across systems analysis and delivery: at Philippine Savings Bank I served as an IT System Analyst and Tech Lead for RESTful API implementations and Unified Back Office initiatives. As a Consultant and Programmer, I built modules for enterprise gateway and ticketing systems, created Oracle PL/SQL stored procedures and scripts, and supported deployments—always with a strong focus on security, quality assurance, and meeting strict deadlines.
Experience
Work history, roles, and key accomplishments
Current
Developed scalable .NET/C# web applications and supported end-to-end delivery across requirements, design, coding, testing, and deployment. Optimized database queries to improve data retrieval by ~40%, built REST APIs supporting 500,000+ concurrent users, and reduced development effort by 50% through reusable components.
Implemented microservices for digital services in the Grundfos iSolutions Cloud/IoT environment, supporting real-time monitoring, fault prediction, and optimization. Built and maintained notification services using reactive architecture and worked on scalable Asset Services using Power BI, React front-end, and .NET Core back-end.
IT System Analyst
Philippine Savings Bank
Apr 2017 - Dec 2019 (2 years 8 months)
Collaborated with developers, testers, and end users to ensure technical compatibility and business requirements were met across software lifecycle activities. Served as tech lead for multiple RESTful API initiatives and led design, development, and testing of a Unified Back Office, including database enhancements using PL/SQL.
II
Programmer (Consultant)
IT Managers Inc.
Apr 2016 - Oct 2017 (1 year 6 months)
Developed modules for Enterprise Gateway and supported back-office maintenance using ASP.NET/MVC. Implemented Oracle PL/SQL stored procedures and created web/window services to integrate with bank systems for SMS sending, while resolving tickets within SLA/SLE.
Programmer (Consultant)
Philstocks Financial Inc.
Dec 2014 - Mar 2015 (3 months)
Built a web-based Online Ticketing System, including a module that creates tickets and assigns them to departments. Developed and tested website components using phpMyAdmin/MySQL-based data storage and validated customizations before deployment.
FR
Freelancer
Freelance
Dec 2013 - Sep 2014 (9 months)
Created websites using WordPress and developed a Windows Forms Payroll System with actuarial math calculations (Net Level Reserve). Delivered and tested solutions for functional correctness prior to release.
Education
Degrees, certifications, and relevant coursework
Far Eastern University
Bachelor of Science in Applied Mathematics, Information Technology
2008 - 2012
Earned a Bachelor of Science in Applied Mathematics with a major in Information Technology at Far Eastern University.
Availability
Looking for a job
Location
PhilippinesAuthorized to work in
Salary expectations
20k-35k USD
Job categories
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