Sajeevan Vinayakavaseekaran

Sajeevan
Vinayakavaseekaran

I'm Technical Lead

About

Experienced Technical Lead and Full-stack Developer with a proven track record in building scalable applications and leading engineering teams.

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Technical Lead & Full-stack Developer.

Passionate about technology, innovation, and building high-quality software solutions.

Birthday: 7 April 1995
Website: sajeevan16.github.io
Phone: +94 76 969 9755
City: Colombo, Sri Lanka

Age:
Degree: B.Sc. Eng. (Hons.) Specialized in Computer Science and Engineering
Email: sajeevan04@gmail.com

As a dedicated Technical Lead with over 5 years of experience, I specialize in architecting and delivering high-performance web and mobile applications. My expertise spans the entire software development lifecycle, from conceptual design to deployment and maintenance. I have successfully led cross-functional teams in the healthcare and logistics sectors, driving digital transformation through innovative solutions like the VIDA Hospital Information System. Passionate about cloud technologies, AI integration, and code quality, I am committed to leveraging technology to solve complex real-world problems while mentoring the next generation of engineers.

Learn More About Me

Why Hire Me

Technical Skills

Leadership & Projects

Career Journey

Years of Experience

Projects Completed

Hours of Coding

Awards & Certifications

Skills

A comprehensive overview of my technical expertise, ongoing learning journey, leadership capabilities, and personal interests. View detailed skills & expertise →

Java Angular Spring Boot Spring Kafka Redis PostgreSQL Oracle MongoDB Hibernate REST GraphQL Git Jenkins JUnit Python Unity Firebase AWS Machine Learning Team Leadership Mentoring Agile/Scrum Project Management Photoshop & Editing Photography Badminton

View leadership & project highlights →

Experience

A summary of my professional experience, education, and contributions to the tech community. View career journey →

Summary

Sajeevan Vinayakavaseekaran

Innovative Technical Lead with 5+ years of experience in full-stack development, cloud solutions, and team leadership. Proven ability to deliver complex healthcare and mobile applications.

Colombo, Sri Lanka
github.com/sajeevan16
linkedin.com/in/sajeevan-vinayakavaseekaran

Education

B.Sc. Eng. (Hons.) Specialized in Computer Science and Engineering

2016 – 2020

University of Moratuwa

Dean's List (7 Semesters)

Second Class Upper Division

Certifications & Continuous Learning

Deep Learning Specialization

2020

Coursera (DeepLearning.AI)

Neural Networks and Deep Learning
Convolutional Neural Networks (CNNs)
Sequence Models (RNNs, LSTMs)
Structuring Machine Learning Projects
Improving Deep Neural Networks: Hyperparameter tuning, Regularization and Optimization
Machine Learning with Python

AWS Cloud Solutions Architecture

In Progress

Self-Paced Learning

Focusing on scalable cloud infrastructure, serverless architecture, and AWS best practices.

Volunteering

Vice Secretary

Jan 2020 - Feb 2021

Tamil Literary Association - University of Moratuwa

Interior Designer, Developer

May 2020 - Aug 2020

Sotkanai 2020 - Tamil Literary Association

Designed and developed the Sotkanai competition Scoreboard Application, enabling remote competition conduct during COVID-19.

Island wide Coordinator & Database Manager

Jan 2018 - Jan 2019

Mora E-Tamils A/L Pilot Examination Committee

Coordinated exams across 18 districts for 5500 students. Developed a web management system for student data and results.

Data Annotator

Aug 2017 - Nov 2017

NLP Center - University of Moratuwa

Assisted in designing tag sets and maintaining annotated data for Tamil language processing projects.

Professional Experience

Technical Lead

Aug 2025 - Present

Cloud Solutions International, Colombo, Sri Lanka

Scrum Master and Delivery Lead, managing multiple teams concurrently to develop Billing, Invoice, and Insurance Approval modules, driving design decisions and ensuring timely project delivery.
Architected and utilized Spring Boot and Microservices to build scalable, high-availability healthcare solutions, ensuring 99.9% system uptime and seamless integration with third-party services.
Leading the technical team in developing and maintaining scalable cloud solutions.

Associate Tech Lead

Aug 2024 - Aug 2025

Cloud Solutions International, Colombo, Sri Lanka

Spearheaded onsite VIDA system deployment in new hospitals in KSA, ensuring stability through pre-release configuration and optimization. Reduced production incidents by 55% compared to the previous year.
Integrated POS and CDMs into the VIDA system, enabling seamless transaction processing. This involved configuring protocols and managing API connections, optimizing operational efficiency across modules.
Led the successful launch of VIDA at Al Hamra Dr. Sulaiman Al Habib Hospital (Saudi Arabia), implementing a fully integrated healthcare system.
Recognized as All-Rounder of the Year 2025.

Senior Software Engineer

Aug 2023 - Aug 2024

Cloud Solutions International

Led a major refactor of the billing module, optimizing complex multi-level rule-based calculations, significantly reducing database interactions, and boosting overall performance by 42%.
Integrated Redis within microservices and utilized Kafka for messaging between modules, optimizing caching and reducing latency from milliseconds to microseconds.
Invented Angular components, such as an infinite scroll select dropdown and user permission directives, enhancing development efficiency across teams.

Software Engineer

May 2021 - Aug 2023

Cloud Solutions International

Implemented features like search, pagination, notifications, schedulers, and auditing across modules, ensuring comprehensive unit test coverage for system reliability.
Conducted unit testing, integration testing, and performance testing, while implementing automation frameworks to ensure system stability and high performance.

Software Engineer Intern

Jun 2019 - Dec 2019

ShipXpress Technologies (Pvt) ltd, A Wabtec Company

TY Application: Requirements analysis and user story creation.
TY Mobile Application: Full-stack Development and Maintenance (Android, IOS).
MCrew: Front-end development.
Zerodays Hackathon: Developed an "Intelligent suggestion service" based on user behavior.

Projects

A showcase of my technical projects, featuring algorithms, hardware design, and system development.

All
Algorithms/AI
Systems
Games

VIDA (Healthcare System)

Implemented modules for Billing, Invoice Approval, RMS, and Masterdata for a large-scale hospital system.

Angular Spring Boot Java Oracle Redis Kafka

Work Experience

Trail Way Messaging System

Real-time messaging system management for logistics and transportation.

Ionic ExpressJS WebSockets

Work Experience

PacGuard (API Security)

API-based attack simulation & detection system using Reinforcement Learning to identify DDoS attacks.

Python Keras RL Docker Flask

Final Year Research

Moway (Self-Driving Car)

Virtual self-driving car simulation using RL to analyze traffic patterns and bottlenecks.

Python TensorFlow Pygame RL

View Code

Exam Management System

Web-based system for managing island-wide A/L pilot examinations for 5500+ students.

PHP MySQL jQuery HTML5

Volunteer Project

Rubik’s Cube 3D Game

3D application to play and solve Rubik’s Cube using a custom algorithm.

WPF XAML VB

Young Computer Scientist

Jupiter (HRMS)

Complete Human Resource Management System with normalized database design and security protocols.

Java MySQL NetBeans

Treasure Loot Game

Object-oriented programming concept implementation through a game.

Java OOP Swing

Nano Processor Design

Designed a 4-bit Nano processor capable of executing instructions, with visualization on a 7-segment display.

VHDL Logisim Assembly

Gallery

A glimpse into my professional journey, achievements, and memorable moments.

Certifications & Awards

Continuous learning and recognition for excellence in technology and innovation.

Young Computer Scientist 2011

Bot Bronze Award (National Level) & 1st Place (Northern Province) for the Rubik's Cube 3D Game.

All-Rounder of the Year 2025

Awarded at Cloud Solutions International for exceptional contribution and leadership.

Deep Learning Specialization

Coursera - Andrew Ng. Includes Neural Networks, CNNs, Sequence Models, and Hyperparameter Tuning.

MongoDB Basics

MongoDB University. Fundamental concepts of NoSQL and MongoDB architecture.

Machine Learning with Python

Coursera. Practical implementation of ML algorithms using Python libraries.

Shopee Code League 2020

Completed 8 weeks of online coding challenges, algorithms, and data analytics workshops.

Testimonials

What others say about working with me.

I worked with Sajeevan when I was working at Wabtec corporation. He's having multi-tasking skills, a very good learner. He absorbed the domain knowledge quickly and contribute the product development. He is a humble person and a good team player with high-level leadership and organizational skills. Based on his positive attitude and technical skill So I can recommend him would be an asset to any team.