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I'm a hands-on senior full stack engineer with a strong track record of delivering reliable fintech, SaaS, and real-time platforms. I enjoy architecting scalable backend systems, building responsive frontends, and creating smooth CI/CD pipelines to streamline production. I thrive in cross-functional teams and love solving complex problems with pragmatic, production‑oriented software solutions. In my career I’ve led end-to-end backend design, implemented real-time features, and mentored others on testing and quality. I’m fluent in Node.js, TypeScript, .NET, and cloud-native tooling, with a focus on reliability, maintainability, and measurable impact for users and stakeholders.…I'm a hands-on senior full stack engineer with a strong track record of delivering reliable fintech, SaaS, and real-time platforms. I enjoy architecting scalable backend systems, building responsive frontends, and creating smooth CI/CD pipelines to streamline production. I thrive in cross-functional teams and love solving complex problems with pragmatic, production‑oriented software solutions. In my career I’ve led end-to-end backend design, implemented real-time features, and mentored others on testing and quality. I’m fluent in Node.js, TypeScript, .NET, and cloud-native tooling, with a focus on reliability, maintainability, and measurable impact for users and stakeholders.

Lakjeewa Jayasundara

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm a hands-on senior full stack engineer with a strong track record of delivering reliable fintech, SaaS, and real-time platforms. I enjoy architecting scalable backend systems, building responsive frontends, and creating smooth CI/CD pipelines to streamline production. I thrive in cross-functional teams and love solving complex problems with pragmatic, production‑oriented software solutions. In my career I’ve led end-to-end backend design, implemented real-time features, and mentored others on testing and quality. I’m fluent in Node.js, TypeScript, .NET, and cloud-native tooling, with a focus on reliability, maintainability, and measurable impact for users and stakeholders.…I'm a hands-on senior full stack engineer with a strong track record of delivering reliable fintech, SaaS, and real-time platforms. I enjoy architecting scalable backend systems, building responsive frontends, and creating smooth CI/CD pipelines to streamline production. I thrive in cross-functional teams and love solving complex problems with pragmatic, production‑oriented software solutions. In my career I’ve led end-to-end backend design, implemented real-time features, and mentored others on testing and quality. I’m fluent in Node.js, TypeScript, .NET, and cloud-native tooling, with a focus on reliability, maintainability, and measurable impact for users and stakeholders.

Available to hire

I’m a hands-on senior full stack engineer with a strong track record of delivering reliable fintech, SaaS, and real-time platforms. I enjoy architecting scalable backend systems, building responsive frontends, and creating smooth CI/CD pipelines to streamline production. I thrive in cross-functional teams and love solving complex problems with pragmatic, production‑oriented software solutions.

In my career I’ve led end-to-end backend design, implemented real-time features, and mentored others on testing and quality. I’m fluent in Node.js, TypeScript, .NET, and cloud-native tooling, with a focus on reliability, maintainability, and measurable impact for users and stakeholders.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Lead Software Engineer at XPAY LTD

November 1, 2023 - February 1, 2025

Led end-to-end backend design and delivery for a trainer booking platform using NestJS, TypeScript, PostgreSQL, Redis, WebSockets, and GCP. Implemented REST APIs for onboarding, memberships, booking lifecycle, cancellations, payments (idempotent), notifications, and RBAC. Reduced DB writes with Redis caching for trainer location and availability updates; enabled real-time experiences with WebSocket-based location tracking and ETA updates. Integrated PayTabs, Firebase, and SendGrid for secure payments, push notifications, and transactional emails. Built GitHub Actions CI/CD pipelines; designed scalable ERP-style architecture for merchants, inventory, and orders; implemented concurrency-safe inventory and order processing in PostgreSQL; established Grafana dashboards for proactive monitoring and service health.

IT Consultant/Developer at Kuwait Stock Exchange

September 1, 2022 - November 1, 2023

Rebuilt a legacy ASP.NET intranet into a mobile-first internal platform used by 400–500 employees. Designed and developed a React Native iOS/Android app from scratch (UI, component architecture, state management, push notifications). Built .NET REST APIs with JWT authentication and SQL Server schemas to support announcements, events, acknowledgments, employee data, and role-based access. Modernized internal communication with company-wide mobile announcements, event updates, circulars, and engagement workflows. Owned production release activities across App Store, Google Play, IIS deployment coordination, and post-release validation.

Senior Software Engineer at Saks Global Pvt Ltd

May 1, 2021 - September 1, 2022

Contributed to a distributed fintech platform with 25+ microservices, supporting migration from an Express.js monolith to a Fastify-based architecture using NATS. Owned onboarding and authentication services using AWS Lambda, Amazon Cognito, and role-based access across modules. Designed AWS S3 document workflows for secure storage and retrieval of investment certificates and transaction records. Improved release confidence with Jest and Cypress test coverage for authentication, onboarding, pricing, and portfolio features. Mentored QA engineers and developers on testing strategy and automation. Built React/TypeScript front-ends for pricing rules and real-time portfolio dashboards with live market data. Also contributed to a CCTV analytics project (Smart AI Connect) with React dashboards, model deployment workflows, and real-time monitoring.

Software Engineer at Right Apps

September 1, 2020 - May 1, 2021

Developed a React Native safety application supporting geofencing, real-time GPS tracking, SOS emergency alerts, and Bluetooth-triggered activation. Improved reliability by implementing background tracking logic and native Android bridging beyond standard React Native limitations. Contributed to a real-time safety platform integrating mobile apps, Bluetooth devices, and web-based monitoring systems.

Associate / Intern Software Engineer at Populo Pvt Ltd

July 1, 2018 - July 1, 2020

GradChat – Graduate engagement platform supporting communication and user interaction workflows. Built Java Play Framework REST APIs and MySQL schemas for graduate communications and user activity workflows. Supported AngularJS to Angular migration, improving frontend maintainability and full-stack delivery. Contributed across backend, frontend, Android, and database layers in an Agile product team.