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Hi, I’m Yash Kalan, a full stack developer based in Galway, Ireland, with 3.5+ years building production SaaS. I’m backend-strong in Node.js and TypeScript, and I’m solid on React for the frontend. I enjoy delivering end-to-end features with robust API design, performance optimisations, and cloud integrations. I’m the author of koverai, an AI-powered test generation CLI that supports 10+ frameworks and integrates with Claude, OpenAI, and Gemini. I’ve shipped 100+ production PRs in Agile teams, worked on Redis caching, AWS storage, and DB-driven APIs, and I thrive in collaborative environments where I own features from backend API to UI. I’m Irish Stamp 4 eligible and available immediately.…Hi, I’m Yash Kalan, a full stack developer based in Galway, Ireland, with 3.5+ years building production SaaS. I’m backend-strong in Node.js and TypeScript, and I’m solid on React for the frontend. I enjoy delivering end-to-end features with robust API design, performance optimisations, and cloud integrations. I’m the author of koverai, an AI-powered test generation CLI that supports 10+ frameworks and integrates with Claude, OpenAI, and Gemini. I’ve shipped 100+ production PRs in Agile teams, worked on Redis caching, AWS storage, and DB-driven APIs, and I thrive in collaborative environments where I own features from backend API to UI. I’m Irish Stamp 4 eligible and available immediately.

Yash Kalan

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

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Hi, I’m Yash Kalan, a full stack developer based in Galway, Ireland, with 3.5+ years building production SaaS. I’m backend-strong in Node.js and TypeScript, and I’m solid on React for the frontend. I enjoy delivering end-to-end features with robust API design, performance optimisations, and cloud integrations. I’m the author of koverai, an AI-powered test generation CLI that supports 10+ frameworks and integrates with Claude, OpenAI, and Gemini. I’ve shipped 100+ production PRs in Agile teams, worked on Redis caching, AWS storage, and DB-driven APIs, and I thrive in collaborative environments where I own features from backend API to UI. I’m Irish Stamp 4 eligible and available immediately.…Hi, I’m Yash Kalan, a full stack developer based in Galway, Ireland, with 3.5+ years building production SaaS. I’m backend-strong in Node.js and TypeScript, and I’m solid on React for the frontend. I enjoy delivering end-to-end features with robust API design, performance optimisations, and cloud integrations. I’m the author of koverai, an AI-powered test generation CLI that supports 10+ frameworks and integrates with Claude, OpenAI, and Gemini. I’ve shipped 100+ production PRs in Agile teams, worked on Redis caching, AWS storage, and DB-driven APIs, and I thrive in collaborative environments where I own features from backend API to UI. I’m Irish Stamp 4 eligible and available immediately.

Available to hire

Hi, I’m Yash Kalan, a full stack developer based in Galway, Ireland, with 3.5+ years building production SaaS. I’m backend-strong in Node.js and TypeScript, and I’m solid on React for the frontend. I enjoy delivering end-to-end features with robust API design, performance optimisations, and cloud integrations.

I’m the author of koverai, an AI-powered test generation CLI that supports 10+ frameworks and integrates with Claude, OpenAI, and Gemini. I’ve shipped 100+ production PRs in Agile teams, worked on Redis caching, AWS storage, and DB-driven APIs, and I thrive in collaborative environments where I own features from backend API to UI. I’m Irish Stamp 4 eligible and available immediately.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Software Developer at Flex Manager

October 1, 2023 - January 1, 2026

Migrated legacy backend functionality from PHP to Node.js (TypeScript), designed scalable RESTful APIs and improved long-term maintainability. Optimized SQL queries and implemented indexing strategies, significantly improving backend response times and data retrieval efficiency. Designed backend business logic using a service-oriented architecture, refactoring monolithic components into modular services. Implemented secure API authentication using JWT-based authorization patterns. Built data-driven reporting systems supporting dynamic dashboard generation and exportable formats (Excel/PDF). Contributed 100+ production-level pull requests, implementing hotfixes and resolving high-priority issues in live environments. Collaborated cross-functionally in Agile sprints to deliver stable, production-grade backend releases.

Associate Software Engineer at Lishheen Anoran Galway

March 1, 2023 - October 1, 2023

Integrated Angular frontend modules with Spring Boot REST APIs and MySQL databases, ensuring efficient backend data flow. Supported backend performance improvements through structured API consumption and query optimization practices.

Team Lead at HSE

March 1, 2021 - September 1, 2022

Led a team of professionals managing COVID-related operations, ensuring accurate data processing and timely issue resolution. Utilized Microsoft Dynamics 365 CRM for case management, data tracking, and workflow optimization. Monitored key performance indicators (KPIs) and generated hourly reports to maintain service quality and compliance. Provided support for complex queries, escalations, and incident resolution, fostering a collaborative and efficient team environment. Partnered with Ernst & Young (EY) in developing a new CRM solution for the data leak process. Promoted positive team culture through team-building initiatives and continuous performance improvement.

Junior Software Engineer at XR, Waterford

October 1, 2022 - February 1, 2023

Contributed to development of Node.js (TypeScript) microservices, applying SOLID principles and modular architecture. Assisted migrating a legacy PHP codebase to a modern Node.js service-based architecture, improving scalability and maintainability. Designed and implemented new REST API endpoints to support feature expansion in a virtual reality platform. Developed unit and integration tests using Jest, improving backend reliability and code quality. Participated in Agile ceremonies, sprint planning, and cross-functional backend feature delivery.

Team Lead at HSE, Dublin

December 1, 2021 - September 1, 2022

Led a team handling COVID-related operations, ensuring accurate data processing and timely issue resolution; used Microsoft Dynamics 365 CRM for case management, data tracking, and workflow optimization; managed operational KPIs and stakeholder communications.

Associate Software Engineer at Lisheen Anoran Galway

March 1, 2023 - October 1, 2023

Developed backend modules and REST endpoints to support platform feature expansion; migrated legacy services to Node.js; implemented unit and integration tests with Jest to ensure backend reliability; collaborated with frontend teams for seamless API integration.

Associate Software Engineer at Ergal Inc, Waterford

March 1, 2023 - October 1, 2023

Developed reusable UI components using Angular; improved frontend consistency and accelerated feature delivery; integrated frontend modules with Spring Boot REST APIs and MySQL databases; implemented unit and integration tests using Jasmine and Karma to ensure frontend reliability; collaborated with backend teams to deliver features on time.

Software Developer at Flexmanager

October 1, 2023 - January 1, 2026

Architected a reusable React component library (modals, form containers, data grids with export) used across the application, reducing feature delivery time by ~30%. Implemented lazy loading, code splitting, and rendering optimisations for large dataset dashboards, cutting initial load time by ~35%. Designed and maintained RESTful API endpoints in Node.js with JWT authentication, MySQL/Sequelize, Redis caching, and AWS S3 storage — owning full-stack features end-to-end. Delivered 100+ production PRs in a 3-engineer Agile team, and migrated legacy jQuery UIs to a modular React + TypeScript system. Maintained Docker-based development environments and contributed to CI/CD pipelines.

Associate Software Engineer at Errigal Inc

March 1, 2023 - October 1, 2023

Built reusable React components for enterprise reporting solutions, improving UI consistency and accelerating delivery. Integrated frontend with REST APIs, managed loading states and client-side state across features. Improved reliability through Jest/Jasmine unit testing and active code review participation.

Junior Software Engineer at Engage XR

October 1, 2022 - February 1, 2023

Built React frontend integrations and Node.js (TypeScript) backend services using MVC architecture and SOLID principles. Maintained high code quality through Jest unit and integration tests across both frontend and backend services.

Team Lead at HSE (Health Service Executive)

December 1, 2021 - September 1, 2022

Led a team managing COVID-19 operational workflows — data processing, issue resolution, and KPI reporting via Microsoft Dynamics 365 CRM. Partnered with EY on design and implementation of a new internal CRM solution.