Custom software development

Custom software development, engineered to run your company.

Enterprise platforms, custom ERP, SaaS products and field apps, with AI built in from the first line. Engineered by people who have run software for millions of users, and delivered as working releases every two weeks.

AI in the workflow
Extraction, search and copilots, tested like code
Every two weeks
A working release your people use
Owned by you
Code, data and IP, from the first commit

Proven at scaleSystems our engineers built and ran for millions of users.

  • 40,500requests a minute at peak, in production
  • 10,000concurrent users on a real-time backend
  • −40%datastore cost after a live migration

What we build

Enterprise software development, from the ledger to the field.

Custom ERP, SaaS products, web platforms, field apps, APIs and the AI inside them. Pick one to see what goes in it, the order it ships in and a result measured in production.

One system of record for the whole operation

Orders, inventory, finance, people and approvals on one data model, shaped around how your company actually runs. Where an ERP product stays your ledger, we build the operations layer around it and keep its core clean.

  • Orders and customers
  • Inventory and procurement
  • Finance, posted to the ledger
  • Approvals and roles
  • Reports from live data

The order it ships in

  1. R1Orders and customers on one record
  2. R2Inventory and procurement
  3. R3Invoicing, posted to the ledger
  4. R4Forecasts and board reports

Works withSAP S/4HANAOracle NetSuiteMicrosoft Dynamics 365WorkdaySalesforce

Build or buy

Buy what is standard. Build what sets you apart.

Custom software pays where your process is the advantage. Discovery settles it in writing for each part of the system, and sometimes the answer is a product.

  1. Buy

    The process is standard

    Payroll, email, the general ledger: work every company does the same way. Configure a product, keep it clean and spend the budget elsewhere.

    • A product covers most of the process
    • Nothing about it sets you apart
    • Its roadmap is good enough
  2. Extend

    The product fits the core

    Keep the ERP or CRM as the record and build the workflows, portals and apps around it, through its APIs, so upgrades stay routine.

    • The core fits, the edges do not
    • Teams work around it in spreadsheets
    • Every upgrade is a project of its own
  3. Build

    The process is the advantage

    Pricing, operations, customer experience or data that no product models well. Built around how you win, and owned outright.

    • The way you work is why customers choose you
    • License costs grow faster than the business
    • No product's data model fits yours

Replacing a system that already runs the business? Application modernization moves it in stages while it keeps running.

How we build

Agents draft. Engineers decide.

AI makes delivery faster, and DORA’s 2025 research finds it still makes delivery less stable wherever the discipline is missing. Here every change crosses the same gates, and every machine step sits between two human ones.

change 1187Credit-limit override

productionLive and traced

  1. EngineerSpecifiedThe change and its acceptance tests, written first
  2. Coding agentDraftedCoding agents write code and tests to the spec
  3. Coding agentPre-reviewedAn AI reviewer makes the first pass
  4. EngineerSignedA named engineer reads every line and merges
  5. PipelineTestedTypes, unit, contract, end-to-end, mutation
  6. PipelineScannedCode, secrets and dependencies, with a signed SBOM
  7. Your teamAcceptedYour product owner tries it in a preview
  8. EngineerReleasedBehind a flag, watched, reversible in one step

The standard every release is held to

Security
Mapped to NIST SSDF and OWASP ASVS 5.0; code, secret and dependency scans on every build
Supply chain
A software bill of materials and signed provenance with every release
Performance
Load-tested at your expected peak, the results kept in your repository
Accessibility
WCAG 2.2 AA on every screen, checked in the pipeline and by hand
Observability
OpenTelemetry traces, logs and alerts from the first release
Delivery
Lead time, deploy frequency, change fail rate, rework and recovery time, reported to you monthly

How we engage

Scoped in phases. Approved in writing.

Large IT projects run 45% over budget and deliver 56% less value than planned, across the 5,400 projects McKinsey and Oxford studied. Ours move one approved phase at a time, with working software every two weeks.

  1. 011 to 2 weeks

    Discovery

    The process as it really runs, the data model, the integrations and the risks.

    You approve the plan: architecture, releases and the scope of the next phase

  2. 02Every two weeks

    Releases

    Working software, demonstrated, in your repository and your environment.

    Your product owner accepts each release

  3. 03When the numbers match

    Cutover

    The new system runs beside the old one until every figure reconciles.

    You approve the switch, with a rollback path

  4. 04From launch

    Run

    A documented hand-over to your team, or Managed Services on a monthly retainer.

    You choose who runs it, and can change your mind

What drives the cost of custom software

Each phase is scoped and approved in writing before it starts, so the cost of the next step is always known before you commit to it.

Scoped phasesDedicated teamManaged ServicesHow engagements work

  • 01Workflows and rolesHow many distinct jobs the software does, and for whom
  • 02IntegrationsHow many systems it talks to, and how usable their APIs are
  • 03Data migrationHow much history moves across, and how clean it is
  • 04ComplianceThe audit, privacy and residency rules it must meet
  • 05Scale and availabilityThe peak load and the uptime it is built for
  • 06AI featuresWhich decisions models make, and how they are evaluated

Architecture

An architecture any team can run. Owned by you.

Well-supported defaults, each with its reason, in your repository and your cloud from the first commit. Where a reason does not hold for you, the decision record says what we chose instead.

  • SurfacesNext.js on the web, React Native on iOS and AndroidOne design system, so every screen behaves alike
  • APITyped and versioned, with a published OpenAPI contractContract tests catch a breaking change before it ships
  • DomainA modular monolith first; services only where scale demandsFewer moving parts until the load says otherwise
  • DataPostgres as the system of record, with events for every changeOne source for every figure, and a full history
  • AIModels as configuration, evaluated in CI, cost tracked per taskSwap a model when your evaluations say it is better
  • IntegrationsAn adapter per partner, with retries and reconciliationA partner's change raises an alert before it reaches an invoice
  • PlatformInfrastructure as code, CI/CD, preview environmentsAny environment rebuilt from the repository
  • Runs onYour cloud account or your own data center

your-org/order-platformin your repository

  • apps/web/Operations platform and customer portal, Next.js
  • apps/field/React Native field app, offline queue and sync
  • services/api/Typed API, its OpenAPI contract and contract tests
  • domain/Pricing, credit and order rules, a module each
  • db/migrations/Every schema change, reviewed and reversible
  • integrations/ERP, CRM and payment adapters that reconcile
  • ai/evals/Graded cases for the extraction model, run in CI
  • infra/Terraform or OpenTofu for every environment
  • docs/adr/Decision records: what we chose, and why
  • RUNBOOK.mdAlerts, escalation, rollback and key rotation

Yours from the first commit, and at every phase

  • The repository, in your organization
  • The IP, assigned in the contract
  • Your cloud accounts and data
  • Decision records and runbooks
  • No proprietary framework or license
  • Our access, removed at hand-over

Get in touch

Tell us what your company should run on.

Write it as big as you imagine it.

17 answers, on the record

What leaders ask before the first commit.

The decision

What is custom software development?

Custom software development, also called bespoke software development, is designing, building and running software around one organization's processes, data and users, instead of adapting an off-the-shelf product. It covers enterprise platforms, custom ERP, SaaS products, web and mobile apps, APIs and integrations, with the code and intellectual property assigned to the client.

Should we build custom software or buy an off-the-shelf product?

Buy where the process is standard, and build where the process is your advantage. A product is the better choice when it covers most of the process and nothing about that process sets you apart. Custom software pays when the way you work is why customers choose you, when no product's data model fits yours, or when license costs grow faster than the business. Discovery answers this in writing for each part of the system, and sometimes the answer is a product.

Should we build a custom ERP or buy one?

Most enterprises do best with both: an ERP product as the financial ledger, kept close to standard, and custom software for the operations that set them apart. A fully custom ERP makes sense when no product models your operation without heavy customization, or when several disconnected systems need to become one record. We build either way, through the ERP's own APIs, so its upgrades stay routine.

What are the benefits of custom software for an enterprise?

The software fits the process, so people stop working around it. Every figure comes from one record, integrations reconcile themselves, there are no per-seat licenses that grow with headcount, and the roadmap is yours. Our clients have measured the difference: one dairy collection network cut payout errors by 92%, and a wholesale credit business spends 85% less time on interest calculation and reconciliation.

How do we choose a custom software development company?

Ask to see what you will own, and how quality is proven. A strong partner shows real artefacts (a repository layout, decision records, a test report, a runbook), names the engineers who will do the work, explains how AI is used in their delivery and who reviews it, puts the code in your repository from the first commit, and scopes each phase in writing before it starts. References with measured results matter more than headcount.

Cost and time

How much does custom software development cost?

Six things drive the cost: the number of workflows and user roles, the integrations and how usable their APIs are, any data migration, compliance and audit requirements, the scale and availability the system is built for, and the AI features and how they are evaluated. Discovery ends in a written proposal for each phase, approved before it starts. Running cost is hosting in your own environment plus any model usage, modeled during the build.

How long does it take to build custom software?

Discovery takes one to two weeks and ends in a dated plan for your system, set mostly by the integrations, the data migration and the number of roles. From then on you receive working software every two weeks, and the first release is chosen so people can use it while the next is built.

Which engagement models do you offer?

Three. Scoped phases, for a defined outcome, with each phase written up and approved before it starts. A dedicated team, for an ongoing roadmap, with named engineers working to your priorities every month. And Managed Services once the system is live, on a monthly retainer with no exit fee.

What happens when our requirements change?

They will, which is why you see working software every two weeks. New scope is written down and estimated before it is built, and you decide whether it goes into the current phase, the next one, or nowhere. Nothing is built that you have not approved.

Engineering and security

How is AI changing custom software development?

In two ways: how software is built, and what it can do. Coding agents now draft code and tests beside our engineers, and every line is still specified first, reviewed by an engineer, tested and scanned before it merges. Inside the software, models read documents, search your records and assist people in the workflow, each one evaluated against your own cases before a release ships.

Can you integrate with our existing systems and legacy software?

Yes. We build typed integrations with ERPs, CRMs, payment, banking, tax and government services and your own systems, with retries, reconciliation and alerts when a partner changes something. Where a legacy system has no usable API, we work through its database or files under controls you approve, or modernize it in stages while it keeps running.

Which technologies do you use for custom software?

Well-supported ones your next team can hire for: TypeScript with Next.js and Node.js, Python for data and AI work, Go where throughput demands it, Postgres as the system of record, Kafka for events, and React Native for iOS and Android. Infrastructure is code in Terraform or OpenTofu, on AWS, Azure, Google Cloud or your own data center. Each choice is written down with its reason, and changed when your constraints call for it.

How do you handle security and compliance?

Security is designed in and evidenced for your reviewers. Every release passes code, dependency and secrets scans and ships with a software bill of materials; access is least-privilege, data is encrypted in transit and at rest, and every change is traced. Controls are mapped to the standards you answer to, such as SOC 2, ISO 27001, HIPAA, GDPR or PCI DSS, and your security team receives the architecture and data flows before the build is approved.

Can you build a SaaS product that enterprise customers will buy?

Yes, and enterprise readiness is in the first release plan. That means tenant isolation chosen for your risk profile, single sign-on and SCIM provisioning, roles and an audit log, usage metering and billing, and the security documentation enterprise procurement asks for.

Ownership and after launch

Who owns the code and the intellectual property?

You do, from the first commit. The repository sits in your organization, the system runs in your cloud account or data center, and the contract assigns the intellectual property to you. There is no proprietary framework or license, so any capable team can take it over.

What happens after launch?

You choose. Either a documented hand-over to your team, with runbooks, decision records and acceptance criteria, or Managed Services: monitoring, on-call engineers, fixes, upgrades and a monthly report, with response times written into the contract.

Can you take over software another vendor started?

Yes. We start with a short technical audit of the code, the architecture, the tests and the delivery pipeline, and give you a written view of what to keep, fix or replace. From there we continue in two-week releases, or stabilize the system first if it needs it.

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