Custom development

Software builtfor the workthat matters.

Web and mobile applications engineered to last. We help startups and enterprises design, build and scale custom software with modern technologies, clean architecture and a focus on real business outcomes.

Start a projectTalk to an engineer
project.ts
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import { z } from 'zod'
import { router } from '@/server/trpc'
 
export const createProject = router
  .input(z.object({
    name: z.string().min(2),
    region: z.enum(['ap-south-1']),
  }))
  .mutation(({ input, ctx }) =>
    ctx.db.project.create(input))

OrbitNexa builds custom web and mobile applications, APIs and integrations, and modernises legacy systems without a big-bang cutover, for healthcare, banking and enterprise clients in India and the UK. Next.js and TypeScript, Node.js and Python, React Native and Flutter, on AWS, Azure or Google Cloud, with every change reviewed by a senior engineer under ISO/IEC 27001 and ISO 9001 certified controls.

What we build

Complete application engineering.

From customer-facing products to internal platforms, we design and build software that solves real business problems, using the right technology stack for your goals.

  • SaaS & Web Platforms

    Scalable web applications, customer portals, dashboards and marketplaces.

    Multi-tenant SaaS with billing, roles and audit · B2B portals · admin consoles

    DPDP · UK GDPR · WCAG 2.2 AA

    Next.jsReactTypeScriptPostgreSQLAWS

  • Mobile Applications

    Cross-platform mobile apps with a single codebase for iOS and Android.

    Field-force and agent apps · patient apps · customer apps with payments

    App-store release pipelines · Razorpay · Stripe · UPI

    React NativeFlutterSwiftKotlin

  • API & Integration Platforms

    Connect systems, automate workflows and enable new possibilities.

    Versioned REST and GraphQL APIs · partner integrations · webhooks · event-driven

    OpenAPI contracts · idempotent retries · rate limits

    Node.jsPythonGraphQLRESTAWS

  • Data-Driven Applications

    Data-heavy applications, analytics platforms and AI-enabled products.

    Genomics report delivery · research data portals · LIMS add-ons · analytics

    HIPAA · NABL workflows · ABDM-FHIR

    PythonFastAPIPostgreSQLPyTorchGoogle Cloud

  • Legacy Modernization

    Upgrade, extend or migrate existing systems with minimal disruption.

    .NET Framework to .NET 8 · Java 8 to current · PHP to Next.js · Oracle to PostgreSQL

    Strangler-fig migration · reconciliation before cutover

    .NETJavaPHPMySQLAzure

  • Enterprise & Internal Tools

    Custom business applications, ERP/CRM systems and internal productivity tools.

    Loan origination and KYC onboarding · collections · regulatory reporting · ERP add-ons

    RBI · FCA Consumer Duty · PCI scope kept outside the app

    ReactNode.js.NETPostgreSQLAWS

Custom Application Development

Ideas to impact.

  • Scalable
  • Secure
  • Maintainable
  • API IntegrationConnect. Automate. Scale.

Our process

From discovery to a product in the real world.

A structured, collaborative process that keeps you involved at every step, with clear milestones, a named artefact per phase and a named sign-off.

  1. 01

    Discover

    Discovery & Strategy

    1-2 weeks

    We map your ecosystem, constraints and KPIs before any engineering starts, so every technical decision has a reason on record.

  2. 02

    Architect

    Architecture & Design

    2-3 weeks

    Architects draw the system and designers prototype the interface, both reviewed and signed off before a line of code is written.

  3. 03

    Build

    Agile Development

    4-12 weeks

    Iterative sprints on modern frameworks, with a senior engineer reviewing every pull request before it merges.

  4. 04

    Harden

    Quality Assurance

    2-4 weeks

    Automated unit, integration and acceptance tests, plus performance and security checks against real-world scenarios.

  5. 05

    Ship

    Launch & Evolution

    Ongoing

    A zero-downtime deployment, then continuous monitoring and iterative enhancement as your standing technical partner.

Week one.

Your repository, a green pipeline, a threat model and a demo by Friday.

  1. Day 1Repository in your GitHub or GitLab organisation, CI pipeline green on an empty app, environments provisioned as Terraform.
  2. Day 2–3Architecture decision records for the stack, the data model and the auth model. Threat model started.
  3. Day 4Backlog for the first two sprints, definition of done agreed in writing.
  4. Day 5First demo, even if it is a login screen on a real URL.
  5. Every 2 weeksSprint demo on the staging URL, a review trail linked to every merged change, and a written note on what shipped, what slipped and why.

Who is on the pod.

Overlap with UK and Indian working hours every day, a shared Slack or Teams channel, a weekly call and a sprint demo every two weeks.

  • Engagement leadA senior engineer, not an account manager
  • Two to four engineersShipping in your repository
  • DesignerWhen the brief has a UI
  • Embedded QAOn the pod from sprint one
  • Architect, part-timeFor reviews and decisions
The full process, phase by phase

Let’s build together

Have an idea?
Let’s make it real.

Tell us about your goals. We’ll help you find the right way forward.

  • Share your idea

    Tell us what you're looking to build.

  • Explore possibilities

    We'll understand your goals and suggest the right approach.

  • Plan the next steps

    Together we define the roadmap.

  • Build what's next

    Turn ideas into real impact.

Let’s discuss
your project

Whether it’s a new product, a platform upgrade or a complex challenge, we’re here to help.

Get in touch

Engagement models

Work with us, your way.

Flexible engagement models designed to fit your goals, timeline and the way you like to work.

  • Launch a Product

    Validate and build your idea with a focused, high-impact team.

    TeamProduct strategist, designer and engineers
    Timeline8 – 12 weeks
    Key deliverablesValidated product, MVP in production and a roadmap

  • Dedicated Engineering Pod

    A senior product team that works as an extension of your team.

    TeamEngagement lead, two to four engineers, embedded QA
    Timeline12 weeks and up
    Key deliverablesOngoing product development and feature releases

  • Modernize Existing Software

    Incrementally modernize without disruption to your business.

    TeamSolution architect, engineers and QA
    Timeline16 – 24 weeks
    Key deliverablesModernised, secure and scalable systems, module by module

Start with a discovery sprint

2 weeks

Stakeholder interviews, a requirement specification, a feasibility and risk read, an architecture sketch and a backlog for the first two sprints. For an existing system: an architecture and code review producing a findings report and a modernisation seam map.

Book the sprint

Yours.

Your repository, your accounts, your IP, a warranty period, and no lock-in.

  • Your repository, your accounts, your IP

    IP assigned on payment. Nothing is held anywhere else.

  • NDA before discovery

    Signed before the first interview, on your paper or ours.

  • A defect warranty after every release

    A stated period in weeks. Defects in what we delivered, fixed.

  • Documented handover, no lock-in

    Runbook, pipeline and telemetry are already yours at any point.

Done means

Tests, a second pair of eyes, a scan, a budget and a runbook.

On every release, whatever wrote the first draft. The gate is the same for a typed line and a generated one.

Definition of done

  • Unit and integration tests, with a coverage target agreed per project
  • End-to-end tests on the critical paths, in Playwright
  • Code review by a senior engineer who is not the author, on every pull request
  • Static analysis and dependency scanning as merge gates: SonarQube, Trivy, Renovate
  • Performance budgets checked in CI: Lighthouse for pages, k6 for APIs
  • WCAG 2.2 AA on every user-facing screen
  • A changelog and a runbook updated with every release

Security and compliance by design

  • OWASP ASVS as the checklist, threat model in week one
  • Secrets in a managed vault, never in the repository
  • Encryption at rest and in transit by default, audit log on privileged actions
  • DPDP and UK GDPR data handling; HIPAA for patient data; PCI scope kept outside the app
  • ISO/IEC 27001 controls on the engagement itself
  • Penetration test before a regulated release

AI in our workflow.

We use it, we say so, and nothing it writes merges without a person.

  1. 01We use AI coding tools — GitHub Copilot, Cursor, Claude Code — for scaffolding, tests and migrations, and we say so.
  2. 02Nothing they produce merges without a human review and a passing test suite: the same gate as any other change.
  3. 03The review trail shows who approved what, so an auditor cannot tell a generated line from a typed one, and does not need to.

FAQ

Questions?
We're here to help.

Quick answers to common questions about working with OrbitNexa. Still have a question? We're just a message away.

Get in touch
  1. 01Which 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.
  2. 02Who 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.
  3. 03How 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.
  4. 04Can 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.
  5. 05What 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.
  6. 06Do you use AI coding tools, and does that affect quality?
    Yes, for scaffolding, tests and migrations, with GitHub Copilot, Cursor and Claude Code. Every change still needs a human review by a senior engineer and a passing test suite before it merges, so the gate is the same whatever wrote the first draft.
  7. 07What time-zone overlap do we get?
    Overlap with UK and Indian working hours every day, a shared Slack or Teams channel, a weekly call, and a sprint demo on the staging URL every two weeks. Your engagement lead is a senior engineer on the work, not an account manager.
  8. 08What does the warranty cover?
    Defects in what we delivered, for a stated period after each release, fixed at no charge. The period is written into the engagement in weeks. Enhancements and new scope are planned as new work.
  9. 09How do you estimate?
    From the backlog written in the discovery sprint, as ranges in weeks per milestone with the assumptions stated. A change in scope is a change in the plan, agreed before it is built, never a surprise afterwards.
  10. 10Can you build HIPAA, DPDP or PCI-scoped applications?
    Yes. The threat model, the data-handling design and the hosted-payments approach that keeps card data out of the application are set in discovery. ISO/IEC 27001 controls apply to the engagement itself, and a penetration test precedes any regulated release.
  11. 11How do you migrate a database we cannot take offline?
    Dual-write or change-data-capture into the new store while the old one keeps serving, reconciliation reports until the two match, then a cutover that is a configuration change with a tested rollback. Oracle or SQL Server to PostgreSQL is the usual shape.
  12. 12What happens after launch?
    A support plan with a stated response commitment, or a pod that stays on the product. Either way the runbook, the pipeline and the telemetry are already in your accounts, so nothing has to be handed back.

From the work on this line

Real problems. Real outcomes.

View all insights

Have a custom build in mind?

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

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