CUSTOM DEVELOPMENT

Custom software with a paper trail, from the first pull request.

Web and mobile applications, APIs and integrations, and legacy modernisation without a big-bang cutover. Next.js and TypeScript, Node.js and Python, React Native and Flutter, on AWS, Azure or Google Cloud, with every merge reviewed by a senior engineer.

Certified·ISO/IEC 27001·ISO 9001·ISO/IEC 20000·ISO/IEC 42001·Startup India·MSME

4 active engagements·India and the UK·See them

How it works

How a legacy system is modernised without a big bang: six stages, two of which can stop it.

Strangler-fig modernisation: map the seams, put a facade in front of the legacy system, rebuild one module behind it with reconciled data, shift traffic with a tested rollback, retire the old module, repeat.

A new build runs the same rail from Carve onward, with nothing to retire: every pull request reviewed by a senior engineer, built once, promoted through the same gated pipeline the cloud line runs. Every stage leaves an artefact: a reconciliation report, a routing change, a runbook. That is what makes the migration auditable, and what a reviewer sees when they ask how the cutover was controlled.

  1. Map (Discovery). An inventory of modules, data and the dependencies between them. The seams are chosen before anything moves. Tools: Dependency map, Data ownership per module.
  2. Facade (API layer). A gateway goes in front of the legacy system so callers stop depending on its internals. Nothing behind it changes yet. Tools: API gateway, OpenAPI contract, Request logging.
  3. Carve (Rebuild). The first bounded module is rebuilt behind the facade, on the new stack, with its data migrated alongside and reconciled against the old. Tools: Next.js, TypeScript, Python, Migration scripts, Reconciliation report. Gate: Reconciliation must match before any traffic moves.
  4. Shift (Traffic). A share of traffic moves to the new module while the old one stays warm. The share grows as the error budget holds. Tools: Feature flags or weighted routing, Error budget. Gate: Rollback is a configuration change, tested first.
  5. Retire (Decommission). The legacy module is switched off once the new one has run clean for an agreed period, and its data path is closed. Tools: Runbook, Archive and access record.
  6. Repeat (Next seam). The same loop for the next module, until the legacy system is gone or only the parts worth keeping remain. Tools: One module per iteration, Weekly demo.

What we build

Five things we build, and what each one is built on.

  • Web applications

    Multi-tenant SaaS and internal platforms with the unglamorous parts done properly: authentication, tenancy, audit, backups.

    Next.js · TypeScript · Node.js or Python (FastAPI) · PostgreSQL

  • Mobile applications

    One codebase for iOS and Android, with native modules where the platform needs them.

    React Native · Flutter · app-store release pipelines

  • APIs and integrations

    Versioned APIs and partner integrations designed as contracts and documented before they are built.

    OpenAPI · webhooks · idempotent retries · rate limits

  • Legacy modernisation

    One bounded module at a time behind a facade, with a rollback path at every step and reconciliation before any traffic moves.

    Strangler-fig migration · data reconciliation · traffic shifting

  • Product engineering pod

    A senior pod embedded with your team, shipping in your repository and your pipeline.

    Two to four engineers · your tools · a demo every week

How we work with you

Three shapes. Most builds start with the first.

  1. 018–12 weeks

    MVP build

    A validated idea taken to a first production release, with CI/CD, monitoring and documentation from the first week.

    You leave with

    A release in production and a codebase your own team can extend.

    Start a project
  2. 0216–24 weeks

    Legacy modernisation

    The seams mapped, a facade in front of the legacy system, and the first modules rebuilt and cut over with reconciliation at each step.

    You leave with

    The first modules live on the new platform, the migration tooling and the runbook to finish the rest.

  3. 0312 weeks and up

    Product engineering pod

    Senior engineers shipping in your repository, with a weekly demo and a code review trail.

    You leave with

    Velocity your team can see in its own pipeline.

Five phases, and the artefact your team holds at the end of each.

The full process
  1. 01

    Discovery & Strategy

    1-2 weeks

    Requirement specification and technical feasibility audit

    Signed off by you, before engineering starts

  2. 02

    Architecture & Design

    2-3 weeks

    Architecture diagram and high-fidelity prototypes, reviewed with your security team

    Signed off by your security team

  3. 03

    Agile Development

    4-12 weeks

    Production codebase with the code review trail and a working CI/CD pipeline

    Signed off by a senior engineer, every PR

  4. 04

    Quality Assurance

    2-4 weeks

    Coverage and QA report with performance benchmarks

    Signed off by your QA and compliance teams

  5. 05

    Launch & Evolution

    Ongoing

    Deployment telemetry and the post-launch support plan

    Signed off by your team, every week

A build engagement runs 9-21 weeks to launch, then ongoing. Every phase ends with a named artefact and a named sign-off, under ISO/IEC 27001 and ISO 9001 controls.

Recent work on this line

Two engagements running on this line now.

  • ERP / Enterprise Software

    Active engagement

    ERP transformation programme for a UK-based consultancy

    • United Kingdom
    • ERP
    • Programme delivery
  • Healthcare / Genomics

    Active engagement

    Genomics-domain platform development for an Indian clinical genomics centre

    • Clinical genomics
    • Clinical workflow
    • Platform

How we work

Built like a product company, shipped like one.

  1. 01

    Audit-engineered by default

    Every engagement runs under ISO/IEC 27001, ISO 9001, ISO/IEC 20000, and ISO/IEC 42001 controls. DPDP-aligned, with HIPAA / GDPR / RBI overlays available per project.

  2. 02

    Founder-led delivery

    Your discovery call is with a founder. The architecture review is with a senior engineer who stays on the project. No body-shop, no offshore handoff, no account-manager translation layer.

  3. 03

    Bias to ship, not slide

    We don't write demos that can't survive a Friday production deploy. Every milestone produces an artifact your team can use immediately: code, diagrams, telemetry.

Questions buyers ask

Straight answers, before the first call.

Which stack do you build on?
Next.js and TypeScript on the front, Node.js or Python (FastAPI) behind it, PostgreSQL by default, React Native or Flutter for mobile. Infrastructure as Terraform on AWS, Azure or Google Cloud. We recommend from this set because we can staff it with senior engineers; we say so when a brief needs something else.
Who owns the code?
You do, from the first commit. The repository is yours, the cloud account is yours, and the CI/CD pipeline runs in them. When the engagement ends there is nothing to hand over because nothing was ever held elsewhere.
How do you modernise a system we cannot switch off?
Strangler-fig, not rewrite. A facade goes in front of the legacy system so callers stop depending on its internals; one bounded module is rebuilt behind it with its data migrated and reconciled; a share of traffic moves across with a rollback that is a configuration change; the old module is retired once the new one has run clean. Then the next seam.
Can your engineers work inside our team and tools?
Yes. The product engineering pod ships in your repository, your issue tracker and your pipeline, and demos every week. No parallel process, no translation layer.
What does a senior review on every pull request actually mean?
No change reaches the main branch without a review by a senior engineer who is not its author, with the ticket, the test run and the approval linked in a tamper-evident log. It is the same code review trail the QA report and the ISO 27001 audit read.

Have a custom build in mind?

Book a 30-minute discovery call. We'll review the brief and sketch an architecture.

+91 912-195-7728Hyderabad, IndiaEvery brief gets a senior review. Reply within 1 business hour, 9 AM-7 PM IST.