Viswa Sekaran

Full-stack for high-traffic transaction systems.

Viswa Sekaran, full-stack engineer. 5+ years building scalable, high-traffic web and mobile apps with React, React Native, Node.js and TypeScript, across fintech, telecom and real estate, from the UI down to backend services.

See the workDownload résumé

This page runs on flags. Pull a lever.

  • Animations across the site

  • Dark palette

  • Summaries, stacks, details

I build the screens and services people trust with real money: a Point of Sale handling 50K+ transactions a day, a UPI SDK that supported 700M+ transactions a month, and Flagit, front to back, so teams can ship behind a switch.

Selected work

Five products, from a bank's payment SDK to my own SaaS and puzzle game.

  1. Verizon Point of SaleRetail point-of-sale web app, at TCS for VerizonSoftware Engineer2024 to now
    Illustration of the Point of Sale interface on desktop, tablet and mobile, with the Redux breadcrumb pipeline to Kibana

    Led the design and development of responsive Point of Sale interfaces in React across desktop, tablet and mobile for a system handling 50K+ transactions a day.

    • React
    • Redux
    • REST APIs
    • Kibana
    • WCAG
  2. Axis Bank UPI SDKUPI payments SDK, at Olive CryptoSoftware Engineer2021 to 2023
    Illustration of the UPI SDK: a grid of 37+ APIs and the React Native to TurboModule to native module chain

    Built a full-featured Axis Bank UPI SDK from scratch to production in 10 months, with UPI functionality comparable to PhonePe across 37+ specialized APIs.

    • React Native
    • TurboModules
    • JSI and Fabric
    • Native Android and iOS
    • CodePush
    • Firebase
  3. MypattaReal estate patta document platformSoftware Development Engineer (remote)2023 to 2024
    The mypatta.in home page: property title verification and land records

    Rebuilt the document procurement workflow end to end, from the React Native app's UX to the Node.js services and a land-records scraping integration behind it.

    • React Native
    • Firebase
    • CodePush
    • Node.js
  4. FlagitFeature-flag management platform and SDKBuilder: React frontend, NestJS and MongoDB backend
    The Flagit landing page with live feature toggles next to an application preview

    A Flagsmith-inspired feature-flag platform and SDK with environment-based rollout, user segmentation and percentage-based releases.

    • React
    • NestJS
    • MongoDB
    • Vercel
  5. Maybe ShikakuReact Native puzzle game, live on Google PlayBuilt end to end: app, backend and release
    Three Maybe Shikaku screens: the Patches home menu, a 7 by 7 puzzle in progress, and the Easy level grid

    My own React Native puzzle game: drag to split a grid into rectangles, with 600 offline puzzles, a Node.js backend and push notifications. Live on Google Play.

    • React Native
    • Reanimated
    • Gesture Handler
    • Node.js
    • Express
    • Prisma
    • Render
    • FCM
    • Notifee
Portrait of Viswa Sekaran
Viswa SekaranFull-stack engineerChennai, IndiaShipping production apps since 2021

About

At Verizon, through TCS, I deliver Point of Sale features end to end, from the UI to backend services, in a system handling 50K+ transactions a day. I also built the Redux middleware logging system that cut production debugging from days to hours.

Before that, I built Axis Bank's UPI SDK in React Native at Olive Crypto, down to a TurboModule bridging JSI and Fabric with native Android and iOS modules. At Mypatta I built the Node.js backend services and a land-records scraping integration behind the procurement workflow, and rebuilt its UX.

I'm comfortable owning projects from 0 to 1: React and React Native on the front, Node.js, NestJS and MongoDB behind them, with accessibility and production observability throughout.

Experience

  1. 08/2024 to now

    Software Engineer at TCS (Verizon)

    Point of Sale features end to end, from UI to backend services, for a 50K+ daily-transaction system, plus the production debugging tooling behind them.

  2. 11/2023 to 07/2024

    Software Development Engineer at Mypatta

    Remote. Node.js backend services and a land-records scraping integration, the procurement workflow UX, and React Native performance.

  3. 08/2021 to 11/2023

    Software Engineer at Olive Crypto

    Built Axis Bank's UPI SDK from scratch to production.

Toolkit

Frontend
React, Vue, TypeScript, Redux, Micro-frontends, Responsive design, Accessibility (WCAG)
Backend
Node.js, NestJS, Express, REST APIs, MongoDB, SQL
Mobile
React Native New Architecture, TurboModules, JSI and Fabric, Hermes, CodePush, Firebase
Quality and tooling
Jest, Quantum Metric, Kibana, Jenkins, SonarQube, Git

Recognition and education

  • Placed 70th of 2,000 participants in TCS's CMI Code Master coding contest.
  • Recognized by leadership for mentoring and leading React sessions for about 200 participants in TCS's internal tech program.
  • B.Sc. in Computer Science, Aditanar College of Arts and Science, Tuticorin (2017 to 2020).

Hiring a full-stack engineer? Write to me.

Write
to meviswasekaranwd@gmail.com

Chennai, India