Rohan Gupta

I build software and occasionally make it work.

Currently building a financial platform.
Backend • AI • systems

Ex-ZynkLabs

[Rohan Gupta @g_rohAn_]

@elgermerlo Shipping the next phase of a financial SaaS platform I’m building from scratch.

This week: wrapping up the formula & dependency engine — formulas, cross-sheet references, dependency tracking, and incremental recalculation.

Building in public 🚀

[Rohan Gupta @g_rohAn_]

@annie_designer_ Hey! I’m interested in the frontend developer opportunity. I’d love to learn more about the project and what you’re looking for. Happy to discuss!

[Rohan Gupta @g_rohAn_]

@devboy_sg Let's connect

[Rohan Gupta @g_rohAn_]

@sushantkr49 Let's connect

[Rohan Gupta @g_rohAn_]

@aslambeg84 The 5 customers tell you the product solves a real, painful problem.

The 100 signups tell you the positioning and potential are there.

The rest are just noise until you fix the gap between 'potential' and 'value'.

[Rohan Gupta @g_rohAn_]

@imhstark Building in public + AI tools are right up my alley. I’m currently building a financial SaaS platform from scratch and documenting the process along the way. Always good to connect with other builders 🤝

[Rohan Gupta @g_rohAn_]

@SaraDiscovers Node.js for me. I’ve been building backend systems with Node.js + TypeScript, mainly APIs, integrations, and data workflows. Curious what you’re building with it?

[Rohan Gupta @g_rohAn_]

@neo_subhamoy Hey let's connect

[Rohan Gupta @g_rohAn_]

Day 4. Built the spreadsheet engine today.

2D virtualization so scrolling thousands of cells stays smooth. Added multi-sheet tabs, TSV paste, and debounced autosave.

Rule #1: store cells sparsely in Postgres, never as binary blobs.

Next up: formulas.

[Rohan Gupta @g_rohAn_]

Day 3. Built out the core data backbone today.

Direct-to-S3 uploads with pre-signed URLs, multi-version file trees, and a BullMQ + Redis pipeline for ingesting financial files.

Nothing beats seeing raw spreadsheets parsed, validated, and mapped into Postgres in ms.

[Rohan Gupta @g_rohAn_]

@danellisona I’m ready. I’ve been building backend systems professionally and am currently building a financial platform from scratch. Would love to hear what your first app is.

[Rohan Gupta @g_rohAn_]

@founderclub2 Building a financial platform from scratch.

Today it's mostly the unsexy stuff — multi-tenancy, workspaces, files, permissions.

The boring parts are starting to get interesting.

[Rohan Gupta @g_rohAn_]

Day 2.

Spent most of the day debugging a 401 I didn't write. A browser extension was silently converting POST → GET and stripping auth headers. Fix: server-side proxy that grabs the token before the browser can touch it. Sometimes the bug isn't in your code.

[Rohan Gupta @g_rohAn_]

Day 1.

Spent today building the foundation: auth, organizations, workspaces, roles, and permissions.

The key part is getting multi-tenancy right from day one.

One user → organization → workspace → resources, with tenant isolation.

Still early. Back at it tomorrow.

[Rohan Gupta @g_rohAn_]

@wh0sumit @rightfitso Interested. I have around a year of backend experience working on APIs, data workflows and production systems at ZynkLabs. Happy to share my resume and relevant work.

[Rohan Gupta @g_rohAn_]

Starting something new.

No big announcement, no perfect plan.
Just building, shipping, breaking things, and figuring it out along the way.
I’ll document the journey here.