Balaji Sankar – Senior Full-Stack Developer
FrontendFull-StackDeveloperIdea toproduct
Design, digitiseyour thoughts.
React and TypeScript on the front end, Node, NestJS and Django on the back end.
or email balajisankar@jusgoeaz.com · hire on Upwork
I reply within one working day. Overlap with US mornings (ET) and European afternoons.
Design, build and launch – and most of the founders I’ve worked with have gone on to their next stage. I also join existing teams to move legacy apps onto React or to lead the frontend. Ten years in. My studio, Jusgoeaz, puts it simply: design, digitise your thoughts.
After the Phase 1 rollout of a dealer and upfitter portal I’m merging into one, the client brought in investors and signed new deals.
Read the case study →Django and jQuery apps moved to React + TypeScript on one live platform, all in production. The latest was checked against 450 behaviours and caught a bug already live in the old app.
Read the case study →Every Chargebee product line on one docs site, generated by a compiler I built, with every legacy URL mapped to its new home.
Read the case study →Generation time roughly halved, and launching a new book is now a configuration task, not an engineering project.
Read the case study →ePettyshop, my own multi-seller commerce SaaS: storefront, admin, POS, payments and WhatsApp.
Live site: epettyshop.com ↗“Balaji Sankar’s analytical abilities, coupled with his programming capabilities, enabled us to address the delivery timelines with a holistic and methodical approach. He is a very composed leader with acute consulting and team management skills. Technically very sound, his eye for detail ensured that our engagements were undertaken without too many hitches. He is a wonderful person to work with: hard-working, dedicated and highly motivated.”
I’ve taken startups from first sketch to a working product – design, build, launch – and most of them made it to their next stage. I think like a co-founder, not a ticket-taker.
I find what’s actually causing the breakage, not just the symptom. Then I put guardrails in place – types, contracts, parity checks – so shipping stops feeling like a gamble.
I’ve moved legacy Django and jQuery apps onto React and TypeScript three times on one platform – without taking the product offline.
Sixty-screen procurement suites, multi-brand dealer portals, data-heavy tables. I make them fast and predictable again.
Storefront, payments, order pipeline, admin, print production. I build front to back with Node, NestJS and Django behind the React.
Ported with Claude Code, checked against 450 behaviours. Built in one week, now in production.
Read every template, inline script and JavaScript file behind the four boards to record what each one fetched, rendered and did on every click.behaviour inventory
Grid, kanban, status and calendar boards rebuilt in React and TypeScript on the shared UI kit, with Claude Code drafting and me reviewing.React + TS · shared UI kit
Four Django and jQuery boards became 40+ files across two repos and a new REST API with 21 endpoints, with no shared code from the old app.Django REST · 21 endpoints
450 parity checks against the legacy views, each marked pass, partial or fail. They caught gaps in the new boards before release, and a bug already live in the old app. Afterwards I wrote the method up as Claude Code skills.parity audit · 450 checks
Type checks and parity checks run before anything ships. You get the speed of AI, with a senior engineer accountable for every change.
Runs on my own Claude Code toolkit: 20 agents and 19 skills, reused across every repo.
50+ products shipped – 11 written up here.
I rebuilt four live Django boards and their API in React and TypeScript with Claude Code, then ran 450 parity checks to show exactly what still differed. Afterwards I turned the method into reusable Claude Code skills.
A compiler that turns a proprietary bracket-tag markup into MDX, checks every page, and generates sidebars, versions and redirects. Plus the Next.js docs site and an editor that publishes straight to GitHub.
A standalone upfitter portal being folded into one dealer dashboard. Phase 1 is live on 70+ shared components, and after the rollout the client brought in investors and signed new deals.
A school-bus safety platform: a fleet dashboard for schools, a React Native driver app with GPS and QR boarding scans, and a parent app that shows the bus live.
Researches prospects and drafts outreach across email, LinkedIn and WhatsApp. Reps can review AI drafts before they send. A Chrome extension suggests replies right inside Gmail and LinkedIn.
A personalised-book business in two countries: storefront, two payment providers, order pipeline and automated 300 DPI print. I replaced hard-coded layouts with a declarative engine and a visual builder.
Online booking for a private mini-theatre and celebration venue: a customer site first built with PhonePe checkout, and the booking flows of the admin dashboard.
Analytics for brands selling on Amazon and Flipkart: profitability, payment reconciliation, inventory, returns with in-browser QR receiving, Buy Box tracking and brand protection.
A sales CRM for the India arm of a Japanese industrial company: opportunity pipeline, access by org hierarchy, targets measured against ERP billing, and funnel-ageing reports.
A daily-learning app for kids, with a console for parents, learning centres and subject experts.
The public developer portal for a global tax-compliance company: API reference, integration guides, SDKs and live demos.
Developer docs platform and the compiler behind it: 4,000+ pages, every product line, one site.
Case study →Procurement & spend intelligence. ~60 screens and the design system four products share.
Case study →Product studio. Frontend developer, then long-term contractor: 20+ products with NFN Labs.
School-bus safety platform: the fleet dashboard, the driver app and the parent app.
Case study →Booking site and staff dashboard for U BOX Thirai Arangam, a private mini theatre in Madurai.
Case study →+ NDA clients in vehicle platforms, sales AI, edtech, fintech and more
Tell me what’s broken or what you want to build. I’ll tell you plainly whether I’m the right person, and what it will take.
I read the codebase and the business rules before I touch a line. Edge cases get written down, not discovered in production.
Claude Code, skills and agents do the heavy lifting. Coding standards, type gates and reviews keep the output consistent with your architecture.
Small, reviewed releases. Handover docs. And I stick around: clients come back for their next product.
Frontend is my craft. Shipping is the job.
I started in 2016 as a frontend developer at a Chennai product studio, obsessing over UI detail. In 2018 I went independent, and in 2019 I founded Jusgoeaz Technologies – jus go easy – to design and build products for clients across 25+ industries. As a freelancer I’ve worked with more than one client at a time, so some engagements ran in parallel.
Since then: procurement suites, vehicle dealer platforms, developer docs, AI sales tools, print-on-demand commerce, fintech dashboards. I work from Namakkal, Tamil Nadu, with clients in the US, Europe and India.
NFN LabsFrontend Developer2016 — 2018
FreelanceFull-stack, frontend-led2018 — Today
Jusgoeaz TechnologiesFounder2019 — Today
NFN LabsContract engineer2018 — 2026
SimfoniFrontend lead2022 — 2026
Your projectOpen for new projectsNext
Pick the one closest to where you are. No price list: every project is different, so we scope it together on a free 20-minute call.
Teams with one clear problem: a release that keeps breaking, a slow dashboard, a feature that’s stuck.
Hourly or fixed-price, scoped on a free 20-minute call
Talk to me →Founders with an idea, or a legacy app that needs to become a real product.
Hourly or fixed-price, scoped on a free 20-minute call
Talk to me →Product teams that need a senior engineer for the long run.
Hourly or fixed-price, scoped on a free 20-minute call
Talk to me →Tell me what’s broken, or what you’re trying to build. I’ll tell you straight whether I’m the right person for it.
or email balajisankar@jusgoeaz.com
I reply within one working day.
Open for new projects · overlap with US mornings (ET) and European afternoons