I'm a Software Engineer with 3+ years of backend and full-stack development experience, focusing on .NET, C#, React.js, Laravel, SQL and cloud technologies. I have a strong foundation in API engineering, microservices, performance optimization and database design. I hold an MSc in Computer Science from the UK and am currently seeking a Software Engineer or .NET Developer role in the UK. I am eligible to work full-time in the UK on a Student Visa (valid until Feb 2026) and plan to switch to the Graduate Route for continued unrestricted work eligibility.

Sivakaran Nadara jah

I'm a Software Engineer with 3+ years of backend and full-stack development experience, focusing on .NET, C#, React.js, Laravel, SQL and cloud technologies. I have a strong foundation in API engineering, microservices, performance optimization and database design. I hold an MSc in Computer Science from the UK and am currently seeking a Software Engineer or .NET Developer role in the UK. I am eligible to work full-time in the UK on a Student Visa (valid until Feb 2026) and plan to switch to the Graduate Route for continued unrestricted work eligibility.

Available to hire

I’m a Software Engineer with 3+ years of backend and full-stack development experience, focusing on .NET, C#, React.js, Laravel, SQL and cloud technologies. I have a strong foundation in API engineering, microservices, performance optimization and database design.

I hold an MSc in Computer Science from the UK and am currently seeking a Software Engineer or .NET Developer role in the UK. I am eligible to work full-time in the UK on a Student Visa (valid until Feb 2026) and plan to switch to the Graduate Route for continued unrestricted work eligibility.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Senior Backend Developer at HolistiQ Technologies Limited
October 1, 2025 - November 15, 2025
Designed, developed, and maintained scalable backend systems using .NET 8, C#, and modern architectural patterns. Built and optimized RESTful APIs and microservices with ASP.NET Core to support web and mobile applications. Improved backend performance by 30-50% via refactoring, async processing, and caching with Redis. Built a scalable .NET API architecture supporting thousands of users with high availability.
Software Engineer at Goodhope Asia Holdings Ltd
September 30, 2024 - September 30, 2024
Built and maintained enterprise .NET applications (C#, ASP.NET Core, SQL Server), improving reliability and supporting daily business operations across multiple departments. Designed and deployed scalable Windows Services and backend systems, automating deployment tasks using PowerShell and supporting CI/CD workflows. Collaborated in Agile ceremonies and cross-functional teams to deliver secure software that met compliance and performance standards.
Software Engineer at Knightsbridge Technologies
October 1, 2023 - October 1, 2023
Delivered testable backend APIs and frontend components in ASP.NET Core and React.js, enhancing application scalability and maintainability. Implemented Entity Framework with SQL Server for efficient data access and improved query performance. Supported version control, release planning, and Agile practices; resolved complex API integration bugs and introduced fixes that reduced recurring issues.
Associate Software Engineer at Codevita Pvt Ltd
November 1, 2022 - November 1, 2022
Developed and optimized backend systems using Laravel, Python, and ASP.NET; designed high-performance SQL queries and stored procedures for real-time analytics dashboards. Assisted in system audits, technical documentation, and knowledge transfer sessions, supporting team-wide best practices. Collaborated with cross-functional teams to analyze requirements, troubleshoot issues, and implement scalable solutions. Participated in code reviews and testing, ensuring high-quality, maintainable software.
Intern Software Engineer at Codevita Pvt Ltd
May 1, 2022 - May 1, 2022
Supported ASP.NET and MS SQL prototyping during Agile sprints, contributing to rapid feature development. Gained hands-on experience with version control (Git), data access layers, and full-stack debugging. Assisted in writing and testing backend logic and APIs to ensure smooth application functionality. Participated in code reviews and team discussions, learning best practices in software development. Contributed to technical documentation and reporting, supporting senior developers and project tracking.
Freelance Full Stack Developer at Freelance (Remote)
August 1, 2022 - November 15, 2025
Designed and implemented dashboards and full-stack applications for small businesses using C#, Blazor, SQL. Managed end-to-end project lifecycle, including requirement gathering, system design, development, testing, and deployment. Utilized Docker for containerization, simplifying deployment, scaling, and environment consistency across projects. Developed automated scripts and workflows to enhance operational efficiency for clients. Collaborated with clients to analyze business needs, deliver tailored solutions, and maintain scalable applications.
Backend Developer at HolistiQ Technologies Ltd
October 1, 2025 - Present
Developing .NET 8 microservices and optimising backend performance for distributed systems. Support the development of scalable REST APIs and distributed system components.
Software Engineer at Goodhope Asia Holdings Ltd
January 1, 2023 - January 1, 2024
Developed enterprise ASP.NET Core applications used across multiple departments. Automated PowerShell and Azure DevOps deployments, reducing manual effort by 30%. Improved API stability by resolving integration issues across SQL Server and EF Core. Delivered secure, production-ready features within Agile sprint cycles.
Associate Software Engineer at Knightsbridge Technologies
January 1, 2022 - January 1, 2023
Built backend APIs using ASP.NET Core and UI components using React.js. Optimised EF Core queries and SQL procedures, reducing query latency by 25%. Improved system reliability by addressing recurring API failures.
Associate Software Engineer / Intern at Codevita Pvt Ltd
January 1, 2021 - January 1, 2022
Developed backend modules using Laravel, ASP.NET and Python. Designed optimised SQL queries for real-time analytics dashboards. Supported prototyping, testing and debugging during Agile development cycles.
Freelance Full-Stack Developer at Remote
January 1, 2022 - Present
Delivered dashboards and web applications using C#, Blazor and SQL Server. Built Docker-based deployments ensuring consistent and scalable environments.
Freelance Full-Stack Developer at Remote (Freelance)
January 1, 2022 - Present
Delivered dashboards and web applications using C#, Blazor and SQL Server. Built Docker-based deployments ensuring consistent and scalable environments.

Education

MSc in Computer Science at University of Hertfordshire
September 1, 2024 - September 1, 2025
BSc in Computer Science at Uva Wellassa University
January 1, 2018 - December 1, 2022
MSc Computer Science (Distinction) at University of Hertfordshire, UK
January 1, 2024 - January 1, 2025
BSc Computer Science at Uva Wellassa University, Sri Lanka
January 1, 2018 - January 1, 2022
Master of Science in Computer Science at University of Hertfordshire, UK
January 1, 2024 - January 1, 2025
Bachelor of Science in Computer Science at Uva Wellassa University, Sri Lanka
January 1, 2018 - January 1, 2022

Qualifications

Microsoft Azure AI Fundamentals
January 11, 2030 - December 12, 2025
Microsoft Azure AI Fundamentals
January 11, 2030 - December 12, 2025

Industry Experience

Software & Internet, Computers & Electronics, Professional Services, Media & Entertainment, Other