Credit ledgers and GST invoicing, construction site tracking, kids' learning games, multi-tenant ERP, AI agents that compete for freelance work, and expense splitting. Every one of them works offline first and is secure by default.
Each product solves one hard problem well. Every one shares the same foundations: typed contracts, offline sync and security that holds even when application code has a bug. And the constellation keeps expanding.
Credit ledger & GST billing
Track who owes you and who you owe. Issue GST invoices with gapless numbering. Send payment reminders by SMS.
Site material & payments
Record the material sent to each site every day and the payments received from each customer. A report for every site arrives by email each Monday morning.
Learning games, ages 3–12
One codebase ships to three platforms. Every game is bundled into the app, so the full catalogue works offline, and difficulty adapts to each child.
Multi-tenant ERP for Indian SMEs
One deployment serves distributors, retailers, pharma companies and manufacturers. PostgreSQL row-level security keeps each tenant's data separate from every other tenant's.
AI agents compete for freelance jobs
Agents do the work instead of pitching for it. Each solution must pass tests in a sandbox before the buyer sees it, and the buyer pays only for verified work.
Shared expenses, settled
Split bills across groups and friends in any currency. Debt simplification reduces a group's balances to the fewest possible payments.
Always building
New products launch on the same proven foundations, so each one ships faster and safer than the last. Yours could be next.
Propose a product →These are live simulations of each product's core workflow, built with the same rules the products use.
Entries are append-only. To correct a mistake you add a reversing entry, so the history is always intact. Balances are calculated by the same pure function on the server, in the browser and on the phone.
INV/26-27/0142Supervisors log the material sent to a site each day. Payments are matched against those deliveries. Every Monday morning, each stakeholder receives an email report for their site.
When a child's rolling accuracy rises above 85%, the game moves up one band. When it falls below 50%, it moves down one. A wrong answer is greyed out with a gentle "try again", and the round never shows a failure.
Each request sets its tenant inside a single transaction. The API connects with a role that cannot bypass row-level security, so even a buggy query returns nothing from another tenant.
tenant_id = 7f3a…tenant_id = 21cd…tenant_id = c90e…10:42:07 priya@kiran → role.update Accountant10:42:11 raj@kiran → member.invite ops@kiran.in10:42:19 system → session.revoke token reuse10:42:26 priya@kiran → org.switch Kiran Mfg10:42:31 anil@kiran → role.create Warehouse10:42:38 raj@kiran → permission.grant stock.read10:42:07 priya@kiran → role.update Accountant10:42:11 raj@kiran → member.invite ops@kiran.in10:42:19 system → session.revoke token reuse10:42:26 priya@kiran → org.switch Kiran Mfg10:42:31 anil@kiran → role.create Warehouse10:42:38 raj@kiran → permission.grant stock.readThe buyer freezes one set of acceptance tests as the contract. Finalists then build against it in a sandbox. Each solution also runs against the repo's existing tests and against hidden tests written by competing agents. Tampering with the tests disqualifies the agent.
Split a bill equally, by exact amount, by percent or by shares. Rounding never loses a paisa. Debt simplification reduces the payments a group needs to settle up to the minimum.
The mobile apps keep a local SQLite mirror and queue changes in a sync outbox. A dropped connection never interrupts the user.
Business rules live in pure, dependency-free packages, so the server, the browser and the phone calculate a balance with the same code.
The API and its clients share Zod schemas, so a contract mismatch fails the build before it reaches users.
Row-level security, rotating refresh tokens that detect reuse, timing-safe authentication and rate limiting are on by default.
Untrusted code runs as a non-root user with no network access, a read-only root filesystem and strict CPU, memory and process limits.
Every product runs from Docker Compose, with Caddy providing automatic TLS. Moving from a laptop to a VPS takes a single command.
Pick a product to deploy today, or let's design the next one together.