Available to hire
Hi, I’m Sanjeev Gunarathnam, a Full Stack Developer with over 5 years of experience building and scaling web applications in fintech, education, and retail domains. I love architecting solutions that solve real-world problems and enjoy collaborating with cross-functional teams to deliver quality software efficiently.
My expertise spans React.js, Node.js, ASP.NET, Python, and Django, and I’m passionate about improving code quality, system performance, and mentoring others. Outside of work, I have a keen interest in machine learning innovations and cloud technologies, always striving to grow my skills and contribute to impactful projects.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Work Experience
Software Engineer at The Law Chronicle, London, UK
July 1, 2024 - PresentDeveloped interactive websites such as a pet adoption platform, QR-code-based smart cart systems for supermarkets, and public library interfaces. Built an autism detection tool using computer vision and Python. Contributed to creating efficient user experiences and innovative solutions in a remote working setting.
Freelance Software Developer at Self-Employed, London, UK
December 31, 2023 - July 15, 2025Delivered a Laravel-based library management system that reduced staff workload by 60%. Designed and implemented various user interfaces for public library patrons to enhance accessibility and ease of use.
Software Developer at Jazz Solutions Pvt. Ltd, Thrissur, India
December 31, 2022 - July 15, 2025Assisted in maintaining a .NET CORE Traffic Asset Management application, focusing on improving the user registration module. Optimized user modules and improved load times by 40%, enhancing overall application performance and user experience.
Software Developer (Consultant) at Lonrix Ltd, New Zealand (via Jazz Solutions Pvt. Ltd)
April 30, 2022 - July 15, 2025Consulted on software development projects with a focus on client requirements and delivery while working through Jazz Solutions Pvt. Ltd.
Student Project Coordinator at Jazz Solutions Pvt. Ltd, Thrissur, India
March 1, 2020 - July 15, 2025Managed internal billing software, facilitated client-side interactions in retail sales software management, and created social media marketing content which increased customer outreach by 50%.
Assistant Systems Engineer at Kalyan Jewelers, Mumbai, India
January 31, 2018 - July 15, 2025Supported system engineering tasks and administrative duties related to IT and software management in retail settings.
Software Engineer at The Law Chronicle
July 1, 2024 - PresentLeading the development of a scalable fintech web platform using React.js and Node.js. Responsible for UI architecture, API integration, and deployment. Collaborate in Agile sprints with designers, analysts and backend engineers to deliver financial workflows and dashboards. Manage Figma-based UI/UX planning and perform regular code reviews for quality assurance. Utilised AWS EC2 for deployment, S3 for file storage and CloudWatch for performance monitoring and logging.
Software Developer at Jazz Solution Pvt Ltd
December 31, 2023 - July 22, 2025Led full-cycle development and architecture across retail and education domains. Owned system design, backend logic, frontend workflows, API contracts, and deployment. Developed projects such as PETSARC, a Django-based pet adoption platform, and an Autism Detection Tool powered by machine learning. Applied unit/integration tests, used AWS services and implemented ML models with TensorFlow and OpenCV.
Consultant Developer at Lonrix Ltd
April 30, 2022 - July 22, 2025Redesigned the authentication and user onboarding system for JunoViewer, a .NET Core-based asset management platform. Merged six login flows into a single-page interface that improved performance by 40%. Assisted in debugging production issues and collaborated with QA for performance optimisation.
Student Project Coordinator/ Technical Trainer at Jazz Solutions Pvt Ltd
March 31, 2020 - July 22, 2025Led project-based training for 60+ engineering students in web development and supervised projects including hospital booking and facial recognition software builds. Received over 95% positive feedback for instruction quality.
Assistant Systems Engineer at Kalyan Jewellers
April 30, 2022 - July 22, 2025Maintained internal retail systems, supported deployment, and designed local marketing content that increased engagement by 50%.
Software Engineer at The Law Chronicle
July 1, 2024 - PresentLeading the development of a scalable fintech web platform using React.js and Node.js, responsible for UI architecture, API integration, and deployment. Collaborated in Agile sprints with designers, analysts and backend engineers to deliver financial workflows and dashboards. Managed Figma-based UI/UX planning and performed regular code reviews for quality assurance. Utilised AWS EC2 for deployment, S3 for file storage and CloudWatch for performance monitoring and logging.
Software Developer at Jazz Solution Pvt Ltd
December 31, 2023 - July 29, 2025Led full-cycle development and architecture for a portfolio of commercial software products across retail and education domains, owning system design, backend logic, frontend workflows, API contracts and deployment. Developed PETSARC, a Django-based pet adoption platform with AWS hosting and media management. Designed an ML-powered autism detection tool using OpenCV and TensorFlow, ensuring accuracy through testing. Built QR Code Smart Cart System, Laravel-based Library Management System, College Library Module, and Retail ERP modules. Mentored interns, led sprint planning, conducted code reviews and maintained client communications.
Consultant Developer at Lonrix Ltd
April 30, 2022 - July 29, 2025Redesigned the authentication and user onboarding system in JunoViewer (.NET Core platform), merging six login flows into single-page interface improving performance by 40%. Assisted in debugging production issues and collaborated with QA for performance optimization.
Student Project Coordinator/ Technical Trainer at Jazz Solutions Pvt Ltd
March 1, 2020 - July 29, 2025Led project-based training for 60+ engineering students in web development, supervised hospital booking and facial recognition software builds, and earned 95%+ feedback for instructional quality.
Assistant Systems Engineer at Kalyan Jewellers
April 30, 2022 - July 29, 2025Maintained internal retail systems, supported deployments, and designed local marketing content that increased engagement by 50%.
Education
Bachelor of Technology at University of Calicut, India
January 1, 2019 - December 31, 2019Diploma at Kerala Technical University, India
January 1, 2013 - December 31, 2013B.Tech at University of Calicut
January 1, 2015 - December 31, 2019Diploma at Sree Rama Govt. Polytechnic
January 1, 2013 - December 31, 2013B.Tech – Computer Science & Engineering at University of Calicut
January 1, 2015 - December 31, 2019Diploma – Computer Technology at Sree Rama Govt. Polytechnic
January 1, 2013 - December 31, 2013Qualifications
.NET Full Stack Foundation (Coursera)
January 11, 2030 - July 15, 2025.NET Full Stack Foundation
January 11, 2030 - July 22, 2025Industry Experience
Software & Internet, Education, Financial Services, Retail
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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