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Devashish Sarmah

@devashishsarmah

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Senior Full-Stack Engineer specializing in Angular, Node.js and Microsoft 365 integrations.

India

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What I'm looking for

I seek roles where I can build performant, user-centric web applications, lead migrations and mentor teams, ideally integrating Microsoft 365 and CI/CD practices in an Agile environment.

I am a Senior Full Stack Engineer with 5+ years building high-performance web applications, specializing in Angular (v2+), TypeScript, RxJS, NgRx and backend development with Node.js (NestJS/Express). I have a strong track record of improving performance (page load times improved ~35%), leading migrations from legacy codebases, implementing CI/CD pipelines and delivering Microsoft 365 integrations including Teams and Copilot declarative agents.

I collaborate closely with product and design teams, mentor junior engineers, drive adoption of best practices and deliver well-tested, maintainable systems. Notable achievements include reducing duplicate submissions by 89% through idempotent transactional endpoints, improving p95 latency from 780ms to 430ms, and shipping session-persistence features that increased resumed-session completion by 24%.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer

Current

Fresh Prints

Jul 2025 - Present (2 months)

Led backend development for Group-Order and Checkout services, reducing duplicate submissions by 89% and improving p95 latency from 780 ms to 430 ms; shipped a session-persistence autosave service that reduced state-loss drop-offs by 37% and increased resumed-session completion by 24%.

NestJS REST APIs Performance Optimization CI CD Backend

Senior Software Engineer

Vantage Circle

Apr 2022 - Jul 2025 (3 years 3 months)

Built a Microsoft 365 Copilot declarative agent and delivered the Vantage Recognition Admin Dashboard using Angular, Nx and NgRx to modularise domains and standardise UI patterns; created embedded Teams apps with SSO and Teams SDK for contextual experiences.

Angular TypeScript NgRX Teams SDK Copilot)SSO Frontend Architecture

Software Engineer

Vantage Circle

Oct 2019 - Apr 2022 (2 years 6 months)

Led migration from AngularJS to Angular 12+, reducing technical debt and improving developer workflows; optimised bundle size and page-load times by ~35% via code splitting, lazy loading and build-time optimizations, and enhanced CI/CD pipelines.

AngularJS Angular Performance Optimization Lazy Loading CI CD Jenkins Webpack

Education

Degrees, certifications, and relevant coursework

The Kaziranga University

Bachelor of Technology, Computer Science & Engineering

2015 - 2019

Completed a Bachelor of Technology in Computer Science & Engineering with coursework and projects focused on software engineering and web application development.