Skip to main content
cd ~/sortstring · custom-software-dev --since 2020

Custom software for the $ businesses_that_actually_run_india

We don't freelance landing pages. We build the operational software dairies, FMCG distributors, colleges and government bodies run on every day — Django + Next.js + Flutter, on AWS, owned by you.

Brief us on your project+91-9452672531
~/sortstring · zsh

$ git log --oneline | head -5

a792fe6 feat: 12 solution pages live

1be30b2 fix: mobile-nav containing-block

5878579 fix: dropdown initial-mount

5cc7c5c fix: sticky header overflow:clip

fe1a696 feat: BITE+BIPE on /

$ npm run build

✓ Compiled successfully in 24.3s

✓ Linting and checking validity of types

✓ Generating static pages (96 / 96)

→ deployed

12
Production platforms we operate
₹8,572 Cr
GMV powered by our custom builds
4–12 wk
Typical time to first working build
In-house
Engineering — not outsourced

The stack we actually use

Four tiers. Production-tested at 45+ clients.

No JavaScript framework of the month. Same stack that runs our own 12 SaaS products.

  • Backend

    • · Django · Python
    • · FastAPI
    • · Node · NestJS
    • · PostgreSQL · MySQL
    • · Redis · Celery

  • Frontend

    • · Next.js · React
    • · TypeScript
    • · Tailwind
    • · Tanstack Query
    • · Recharts

  • Mobile

    • · Flutter · Dart
    • · iOS · Swift
    • · Android · Kotlin
    • · Firebase
    • · OneSignal

  • Infra

    • · AWS · ECS
    • · Terraform
    • · GitHub Actions
    • · CloudWatch
    • · PagerDuty

How we ship

Four phases. Weekly demos. No quarterly surprises.

  1. W1–2
    1

    Discovery + FRD

    Workshops with the people doing the actual work. FRD signed off before a line of code.

  2. W3–4
    2

    Architecture + sprint plan

    Domain model, integration map, sprint backlog with sized stories.

  3. W5–N
    3

    Build with weekly demos

    Every Friday: working code in your UAT environment. No quarterly surprises.

  4. Go-live
    4

    Deploy + AMC

    Production runbook, hyper-care for 4 weeks, AMC handover.

What we build

Five categories. Each with at least one production reference.

  • Backend platforms

    Django · Python · FastAPI. Multi-tenant SaaS, REST + GraphQL, async job queues.

  • Field-operations platforms

    GPS-verified workflows, offline-first mobile, dispatcher dashboards.

  • ERP / accounting integrations

    Tally Prime XML, SAP B1, custom ERP — two-way idempotent sync.

  • B2B SaaS with isolation

    Per-client database isolation. Required by enterprise procurement.

  • Custom dashboards + analytics

    Recharts, server-side aggregation, role-based MIS for the CFO.

  • Marketplaces + portals

    Vendor onboarding, KYC, payment splits, admin tooling.

Common questions

Questions CTOs ask before signing.

What's the typical timeline for a custom software project?

Discovery + FRD: 1-2 weeks. Build: 12-26 weeks for fixed-scope projects, depending on integrations and team size. Pilot deployment + UAT: 2-4 weeks. Full rollout: 1-2 weeks. Most mid-size enterprise builds land in 16-22 weeks end-to-end. Larger platforms (multi-module, multi-integration) extend to 9-12 months.

Will we own the source code?

Yes — source code ownership transfers to you from day one. We push to your Git repository (or ours, if you prefer, with read access for your team). Architecture documentation, runbooks, and deployment procedures are part of every handover. No vendor lock-in by design.

Can we host the software ourselves instead of using your AWS?

Yes. We support deployment to your AWS account, your Azure, your GCP, or your on-premise infrastructure. We document the deployment topology so your team can take over operations after handover. The only requirement: a Linux environment that supports Docker or systemd-managed Python services.

Do you offer dedicated team / staff augmentation models?

Yes. Dedicated team retainers start at Rs 4 Lakh per month for a 2-engineer pod (backend + frontend or backend + mobile) including project management. Three-month minimum commitment. Engineers work on your roadmap full-time and your team has direct daily standup access.

What technologies do you specialise in?

Backend: Django (Python), FastAPI, Node.js. Mobile: Flutter (production-hardened), React Native on request. Frontend: Next.js, React. Database: MySQL, PostgreSQL. Infrastructure: AWS (Mumbai by default for India clients), Docker, Celery + Redis for async work. Integrations: Tally, SAP B1/HANA, Razorpay, WhatsApp Business, SMS, GST IRP, Aadhaar masking.
Talk to us

Get a 30-min walkthrough on your data.

No deck, no fluff. Just the modules from this article running live.

Prefer to pick a slot? Use the full form →

Working code in week 5. Not a deck.

30 minutes. Bring your problem. We bring our 12-product playbook. You leave with a sized estimate and a sprint plan.

Brief us on your project