Building

Replace the system the business runs on, without stopping the business. Enterprise Software Engineering Custom enterprise software & ERP development

Robust, scalable systems for core operations — architecture-first, strongly typed, secure from day one, and migrated in stages so the work never has to pause for the upgrade.

Understanding the discipline

What enterprise software really carries.

Enterprise software is the system a business actually runs on — the place orders, records, approvals, and money move. It is rarely the newest thing a company owns and almost always the most load-bearing, which is exactly why replacing it feels dangerous.

The risk is never the new system on its own. It is the cutover — moving live operations from something fragile and half-understood onto something new without losing a day of work or a row of data. Handled in stages, that stops being a leap and becomes a sequence.

  • Core systems moved from “keep it running” to “it decides how fast we can move.”

  • Standing still on old software became more expensive than replacing it.

  • Migration stopped being one risky launch and became a staged, reversible sequence.

  • The system of record became the thing every other tool has to agree with.

Legacy modernisation

An old, fragile platform re-architected and migrated in stages, without a big-bang cutover.

Custom business systems

ERP, workflow, and internal tooling built to how the business actually runs, not to a package's assumptions.

Integration & consolidation

The systems that don't talk connected into one source of truth, so the data stops disagreeing.

The business case

Why businesses invest in enterprise software engineering.

Returns that show up on the business, not on the engineering backlog.

  • 01

    Fragility replaced with maintainable code

    Typed, tested, and documented, so a change stops being a risk that only two people in the building can carry.

  • 02

    Lower total cost of ownership

    One system your team can extend, instead of a licence and a specialist billed for every modification.

  • 03

    Faster, safer releases

    A pipeline and a rehearsed rollback turn deployment into a decision rather than an event the business schedules around.

  • 04

    Scale you won't outgrow next year

    Architecture built for the load expected in year three, not only for the load present on the day it launches.

What we build & capabilities

The things you can commission — and what each one ships with.

Defined engagements, one at a time: the thing itself on screen, and the capabilities that come with it.

01 / 06

Legacy modernisation

An old, fragile platform re-architected into a typed, tested codebase and migrated in stages — so the system stops being understood by two people and the business never pauses for the upgrade.

Capabilities

  • Architecture review
  • Staged migration
  • Data migration
  • Zero-downtime cutover
  • Full documentation

Business outcomes

Where the business is today, and what changes.

The operational difference, in the terms the business already measures itself in.

A core system only two people fully understand
A typed, tested, documented codebase any engineer can maintain
Every change to the platform is a risk nobody wants to take
Changes shipped in small, reversible increments
A licence and a specialist billed for every modification
One system your own team extends, at a lower total cost
Data that disagrees between disconnected tools
One source of truth every system reconciles against
A replacement that means stopping the business to switch over
A staged migration that keeps operations running throughout

Scalable, maintainable systems

Lower total cost of ownership

Faster, safer releases

Our engineering process

How the engagement actually runs.

Every stage has an owner, an output, and a point where you can change direction.

  1. 01

    Discovery

    How the business actually runs today, and where the current system is genuinely the constraint.

  2. 02

    Architecture

    The target design, data model, and integration boundaries, chosen for year-three load.

  3. 03

    Migration plan

    The sequence of stages, each independently shippable, each with a way back.

  4. 04

    Build

    Typed, tested increments delivered against clear acceptance, not a single distant milestone.

  5. 05

    Data migration

    Cleaned, validated, and reconciled so the numbers match on both sides of the move.

  6. 06

    Security & quality

    Access model, encryption, and automated testing verified before anything goes live.

  7. 07

    Cutover

    A phased, rehearsed switch, with the old system on standby until the new one is proven.

  8. 08

    Handover & support

    Runbook, documentation, and a team that keeps improving the system it built.

Why Sumago

Why teams choose Sumago.

The technology partner serious businesses build with — and stay with.

Architecture-firstCertified engineeringStaged, reversible migrationSecure by designBuilt to hand over

Business understanding first

We understand the business before writing a line of code.

Strategic consulting

A consultative partner, not just a development shop.

Multidisciplinary team

Analysts, architects, designers, engineers, cloud & AI specialists, QA.

Transparency

Clear communication in every engagement.

Engineering quality

High standards, scalable and secure architecture.

Long-term partnership

Support and improvement long after delivery.

Technology ecosystem

Mainstream technology, chosen so you can hire for it later.

The stack is a means, not a position. It gets chosen against your constraints — and it stays maintainable by people who aren't us.

Node.js / NestJSReact / Next.jsPostgreSQLCloud-native
  • Slack

Proof of work

Work that has already shipped.

Real engagements, named clients, and what changed for the business behind them.

A Digital Operating System for Residential Communities
Real Estate

A Digital Operating System for Residential Communities

Client challenge
Residential societies were being run on manual processes that satisfied no one. Maintenance was collected by chasing; access at the gate was recorded in registers no one could audit; finances lived in books only one person could read; and residents had little visibility into where their money went or what their committee decided. The result was friction, disputes, and a heavy administrative burden. For the operators managing many such communities, the problem multiplied — with no standardized, scalable way to oversee a growing portfolio.
Our solution
A community-living platform that digitizes the entire operation of a residential society onto one connected system. Each stakeholder gets an experience built for their role — residents manage payments, approvals, and communication from their phone; on-ground security manages access and attendance in real time; finance manages billing, expenses, and reporting with full transparency; and community leadership governs the whole operation with every action traceable. Above them all sits a centralized oversight layer that lets an operator onboard, standardize, and manage an entire portfolio of communities from one place. ### The platform A full suite on one shared backend, with a purpose-built surface for every stakeholder: - **Resident App (Android & iOS)** — *for the community member.* Pay maintenance, approve visitors, read notices, and raise concerns from the phone. *How it helped:* gave residents transparency and convenience, replacing chase-ups and disputes with confidence in how the community is run. - **Security App (Android & iOS)** — *for the on-ground guard.* Manage visitor and delivery access, capture approvals instantly, and log attendance. *How it helped:* turned an unauditable paper register into instant, recorded, verifiable gate security. - **Finance App (Android & iOS)** — *for the treasurer.* Manage billing, expenses, and clear financial reporting. *How it helped:* made the community's money transparent by default, ending the opacity that bred mistrust. - **Leadership Web Platform** — *for the committee.* Govern residents, billing, notices, complaints, and access — every action traceable. *How it helped:* cut the committee's administrative burden while making governance accountable. - **Operator Web Platform** — *for the managing operator.* Onboard, standardize, and oversee an entire portfolio of communities from one place. *How it helped:* turned society management into a scalable, recurring-revenue service that grows community by community. ### Architecture highlights - **Multi-tenant SaaS with a tenant hierarchy** — federations group communities, each fully isolated, all governed from one platform. - **Strict per-tenant data isolation** — one community's data can never reach another's, enforced below the application layer. - **Real-time layer** — live visitor approvals and push notifications delivered over a real-time channel. - **Secure payments integration** — maintenance collection flows through an isolated, security-conscious payment layer. - **Role-based access across every stakeholder** — resident, security, finance, committee, and operator each see only what their role permits. ### Technology stack The resident, security, and finance apps are built as **cross-platform React Native** mobile applications — one build that runs natively on **both Android and iOS** — while the leadership and operator platforms and backend run on the **MERN stack** (MongoDB · Express.js · React · Node.js).
Business impact
With everyone working from the same real-time system, the friction that breeds disputes simply disappears: payments are trackable, access is secure and recorded, notices reach every resident, and the finances are transparent by default. Committees carry less administrative weight and residents gain genuine confidence in how their community is run. For the operator, it becomes a scalable, recurring-revenue platform — one that can grow community by community on a single, standardized foundation.

SaaS Platform · Multi-Community Oversight · Role-Based Experiences · Digital Payments · Real-Time Operations