Debayan Sen

Tech Lead and Senior Frontend Engineer in Kolkata. Thirteen years of steady, patient work on interfaces that hold up at enterprise scale.

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Niwa · the garden

Tended for thirteen years

Senior Frontend Engineer with 13+ years in complex UI architecture and high-performance web apps. Now extending into MERN backend architecture and AI-driven features.

Debayan Sen
22.57° N · 88.36° E

Craft

Code is a puzzle

I look for the one missing piece that makes the logic click, and build products as performant underneath as they are calm on the surface.

Method

High-tech, high-touch

I work where AI tooling meets human-centred design, to make tools that feel intuitive.

Mission

A more usable internet

Every component is built for everyone, keyboard and screen reader included, to WCAG 2.1 AA.

Off the clock

Japan and patterns

The disciplined beauty of Japanese culture, breath practice, and the patterns in numerology.

Tōryūmon · the dragon gate

Climbing the waterfall

In the old story, a koi that swims all the way up the waterfall becomes a dragon. This is the climb, from 2010 upward. Scroll and the koi rises with you; open any role for the detail.

Dec 2010 – Jun 2011Software DeveloperCES Technologies

Worked on the BSF intranet project: architecture, scope and database troubleshooting.
Supported techno-economic feasibility studies for power infrastructure in the Middle East.

JavaScriptjQueryMS Access

Jun 2011 – Jul 2012Technical ConsultantWIT Systems

Feasibility reports, scope and milestones for QAFCO and Qatar Melamine Company web platforms.
Risk assessment, vendor evaluation, testing and training.

Oracle WebCenterjQueryOracle SQL

Dec 2012 – Mar 2013Software DeveloperDynPro India

Designed the front-end architecture and technical flow for IBM's Amica project.
Technical documentation, unit and sanity testing.

JavaScriptjQueryJSON

May 2014 – Oct 2014HTML DeveloperBajillion Staffing Solutions

Web-based single-page e-learning solutions across projects.
Specified functionality modules; testing and QA.

HTML5CSS3JavaScript

Oct 2014 – Nov 2015Software EngineerLearningMate Solutions

Built single-page e-learning solutions for John Wiley & Sons.
Owned project structure, planning, testing and QA.

JavaScriptjQueryJSXGraphBootstrap

Mar 2016 – Jul 2017Software EngineerEmami Frank Ross Ltd.

Built and maintained the single-page e-commerce site.
Analysed specifications, set up project structure and planning.
Coordinated vendor resources; owned testing, debugging and QA of deliverables.

AngularJSAngular MaterialSASSNginx

Aug 2017 – Nov 2017Full Stack DeveloperFreelance

Designed and built mobile and web applications during a focused freelance period.

React NativeExpoReactJSRedux

Mar 2018 – Nov 2018Software EngineerAdvantage One Human Resourcing

Front-end development for server management systems.

ReactJSReduxSASSSVN

Nov 2018 – Jun 2022Technical LeadWipro Technologies

Led front-end development for e-discovery (Veritas) and server management (HPE) platforms.

AngularRxJSMaterialReactJSReduxSASS

Jun 2022 – Feb 2026Team Lead / Senior Software DeveloperCognizant Technologies

Led enterprise recruitment and agriculture platforms in React and TypeScript.
Led cross-functional teams delivering front-end solutions for Fortune 500 clients in banking and telecom.
Standardised UI/UX patterns across workstreams, cutting development time by 30%.

ReactJSTypeScriptNextJSVueJSReduxJestReact Testing LibraryDatadogAdobe Analytics

Through the gate: Team Lead at Cognizant, leading frontend for Randstad, Verizon, Westpac and Bayer.

Sakuhin · the work