We don’t sell slide decks.
We ship production.
We architect, code, and operate the systems your company runs on — the same engineers from the first call to the last deploy. 55+ products live. Four continents. One Slack channel between you and the people writing the code.
3.2 million transactions a month, moving through the systems we engineered.
Every packet on the track is a real production request path — edge, API, workers, persistence, ack. The systems behind it run on Terraform we wrote, observability we own, and runbooks we hand to your team on day one.
Four systems. Four production codebases. Zero mockups.
Every case below ships real traffic from a real client. The metric on each card is what their dashboard reads today — not what we projected in the SOW.
Every system we ship is built the same way — and we hand you the keys.
Five layers. Observable end-to-end. Deployed via Terraform you keep. You get the architecture diagram, the runbook, and the on-call playbook before the first sprint closes — because the day we walk away, your team is the one paging on it.
- Next.js / React, SSR + edge caching
- Design system + component library
- CDN with stale-while-revalidate
- Optimistic UI for write-heavy flows
- REST or GraphQL · OpenAPI specs
- Auth, RBAC, token rotation
- Event bus for async workflows
- Idempotency keys on every write
- Postgres · Mongo · DynamoDB
- Redis cache + session store
- Elasticsearch for search workloads
- PITR backups · cross-region replicas
- Kubernetes or Lambda runtimes
- Terraform-everything, no clickops
- Blue / green deploys, instant rollback
- Multi-AZ, multi-region where it matters
- Grafana dashboards · Prometheus metrics
- Sentry errors · structured logs
- Audit logs for every privileged action
- On-call rotation + runbook handoff
Four offerings. Fixed scope. Posted prices.
Hours aren’t a deliverable. Systems are. The price below is what you pay; the timeline is what you’ll get a Friday demo against; the contract has a 30-day exit and an NDA both ways.
Custom Platforms
The stack from edge to disk, written from first principles. Architecture, code, infra, observability — all of it, ours to build, yours to keep. Documented like we expect to be audited.
Product Engineering
Zero to App Store in one engagement. Spec, design, build, ship — for the founders who need a working product, not a slide deck. Senior engineers, two-week sprints, Friday demos that show real code.
Cloud & Infrastructure
AWS, Azure, GCP — or the migration between them. Multi-region rebuilds, cost-optimization passes, latency post-mortems. Terraform for everything, Grafana for the boring parts, a runbook for the 3 AM call you hope never comes.
Senior Engineering Pods
A 2–6 engineer pod, embedded — not “augmented.” Same Slack. Same standups. Same git history. Three to twelve months, scale up or down with 30 days' notice, no offshore handoff.
Tested in our own engine room.
Every pattern we sell, we run in production on a product we built.
We don’t recommend stacks we haven’t bet our own roadmap on. The four products on our shelf aren’t pivots — they’re the load tests for the agency. When you hire us to build your platform, you’re hiring the team that’s already running four of their own in production.
Panini Engine
Computational Sanskrit grammar platform.
Horizontally-scaled inference path for sub-100ms grammar queries.
See it runCDLY
Digital business cards + Google review loop.
NFC, web, and review-loop integrations on the observability stack we ship to clients.
See it runPreschool Suite
Teacher, parent, and admin apps.
Three apps, one backend, an offline-first sync layer built for low-bandwidth markets.
See it runDigiMarkety
AI-powered marketing for Indian SMBs.
Multi-tenant Postgres design now running inside two of our FinTech clients’ core stacks.
See it runKickoff to production in four phases. No black boxes.
No month-long “discovery sprint” that bills for nothing. A real engineer is in your repo by week two on every project — with a fixed deliverable for each phase, written and signed.
Architecture Audit
One call. One page. 48 hours — including the “we’re not the right fit” version.
Discovery & SOW
Five business days from yes to signed SOW. Fixed scope, not an estimate with twelve assumptions.
Build
First commit, week 2. Friday demos on real code. The engineer who scoped ships.
Deploy & Operate
Zero-downtime cutover. Load + chaos tested. 30-day exit — the runbook works without us.
Architecture Audit
One call. One page. 48 hours — including the “we’re not the right fit” version.
Discovery & SOW
Five business days from yes to signed SOW. Fixed scope, not an estimate with twelve assumptions.
Build
First commit, week 2. Friday demos on real code. The engineer who scoped ships.
Deploy & Operate
Zero-downtime cutover. Load + chaos tested. 30-day exit — the runbook works without us.
This isn’t a testimonial.
It’s an outcome — paired with the number it produced.
If a claim isn’t measurable, it isn’t on this page.
“We talked to four agencies. TantraDev was the only one that asked about our compliance roadmap on the first call — not our budget. Three months later we shipped, on time and under PCI scope.”
The boring questions your security team is about to ask, already answered.
NDA, IP assignment, SOC 2 path, HIPAA & PCI-aligned playbooks, code escrow on request. Standard. Not negotiated.
What founders actually ask. Not the questions the brochure answers.
The five questions our last six new clients asked on the first call. The pricing is real. The exit clause is real. The rest is up to you.
30 minutes on the phone. One page in your inbox. A roadmap before we hang up.
Bring a system, a spec, or a problem. We’ll send you a one-page written architecture review — what to build, what to skip, what it’ll cost — before the call ends. You keep the audit even if we’re not the right fit.