Services
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03 — Application Development
Fixed or T&M

The system your roadmap keeps postponing.

Discovery through production for customer-facing and internal applications — including the unglamorous parts: authentication, audit trails, reporting, permissions and data migration.

Engagement
9–27 weeks
Model
Fixed or T&M
First release
6–8 weeks median
Chapter one
Overview

Why application projects fail after the demo

Anyone can show you a working application early on. What decides whether it survives contact with real users is the part nobody demonstrates: role-based permissions, audit history, error handling, reporting, and migrating the data that already exists in spreadsheets.

We estimate that work explicitly and build it early. Adding an audit trail to a system that is already live is the same work carried out under worse conditions, at greater cost, at the point in a project where there is least room to absorb either.

Suited to
Teams whose core process runs on spreadsheets that have outgrown themselves
Companies with an internal tool built by someone who has since left
Founders who need a first version that will not be discarded once the business grows
Organisations replacing a legacy system where migration carries real risk
Chapter two
Scope of work

What the service covers

01
Web applications

Customer-facing and internal systems, with role-based access, reporting and an audit trail present from the first release.

02
Mobile applications

Cross-platform by default, with native builds where the product genuinely depends on platform capability or hardware.

03
Enterprise applications

Systems that integrate with ERP, CRM and finance, designed around the integration constraints you already have.

04
Custom software development

Where no product fits the process, and adapting the process to a product would cost more than building.

Chapter three
Outcomes

What you receive that a prototype does not include

01
Production readiness, priced in

Permissions, audit, error handling and reporting appear in the estimate, rather than in a later phase you discover after committing.

02
Migration rehearsed

Real data moved in a full rehearsal before cutover, so go-live is not the first time the migration has been attempted.

03
Documented for the next team

Architecture notes, runbooks and decision records committed alongside the code, so onboarding a new developer does not require us.

04
Support that already knows the system

The people who built it are the people on the support rota. There is no handover to a separate maintenance vendor who has never seen it.

Chapter 3b
The estimate

What a demo shows, and what production requires

Prototypes are inexpensive because they omit the right-hand column below. We estimate it explicitly, which is why our figure is often higher than the one beside it, and why our dates tend to hold.

In the demo
Also in our estimate

One user on the happy path, signed in as an administrator

Role-based permissions, invitations, deactivation and delegated access

A form that saves a record

Validation, optimistic locking, audit history and soft deletes

A chart drawn from sample data

Reporting at production volumes, export, and scheduled delivery

An empty database

Existing records migrated from spreadsheets, rehearsed before go-live

Chapter 3c
Non-negotiables

Built in the first sprints, not a later phase

Audit trail

Who changed what, when, and what it held before. Adding this to a live system afterwards is markedly more expensive and more disruptive than building it in.

Sprint 1
Permission model

Designed against your actual organisation chart, including the exceptions people tend to leave out of the requirements.

Sprint 1
Error handling

Structured logging and alerting, so failures surface to us before a user reports them.

Sprint 2
Migration harness

A repeatable import that can be run again as often as needed, rather than a single script written once and discarded.

Sprint 3

Source code, cloud accounts and repositories are registered in your name from the outset, as on every Candela engagement.

Chapter four
Delivery process

How engagements are run

I
Discover

Process mapping, integration inventory, data audit and a written problem statement both sides sign off.

1–2 weeks
II
Plan

Domain model, architecture, permission model, integration contracts and a costed release plan.

1–2 weeks
III
Build

Two-week sprints with a Friday demo, staging open to your team throughout, and the audit and reporting layers built early.

6–20 weeks
IV
Launch

Load and security testing, migration rehearsal on production data, then cutover with a rollback path.

1–3 weeks
V
Operate

Managed support with named engineers, monitoring, and a prioritised iteration backlog you own.

Varies
Chapter five
Tools and platforms

Chosen around your operations team, not ours

Java with Spring or .NET Core where you already run a Java or Microsoft estate, because your own people can support it. Node.js where iteration speed matters more than fitting an existing estate. PostgreSQL unless there is a specific reason for something else.

Frontend
React · Next.js · TypeScript
Backend
Node.js · Java / Spring · .NET Core · Python
Mobile
React Native · Flutter · Swift · Kotlin
Data
PostgreSQL · MySQL · MongoDB · Redis

We avoid: rewriting a working backend in a different language

See the full technology page →
Chapter six
In practice
Application Development
Manufacturing

Payroll and attendance across three locations, on one system

Six spreadsheets and an ageing system held employee records, attendance, payroll inputs and leave requests between them. Shift rules differed by site and none were documented, so we wrote them down before configuring anything, then built a single platform with employee self-service and migrated in stages with on-site training.

−65%
payroll processing time
100%
employee records digital
10 wks
deployment
Practice: HRMS Solutions · Team: HRMS consultant, business analyst · Technology: Custom HRMS, PostgreSQL, AWS
Read the write-up →
After the
estimate

Fixed price where discovery and architecture are complete and the scope is genuinely knowable. Time and materials where the product is still being defined. We will tell you which applies before you commit, rather than quoting a fixed price on a scope that cannot yet support one.

Yes, following a review. We read the code, the deployment setup and whatever documentation exists, then set out what is worth keeping, what needs replacing, and what can be left alone for the time being. Occasionally the conclusion is that rebuilding costs less than repairing, and we would rather say so at the start than once the repair is underway.

Sprint planning is where changes are absorbed. Anything that alters the release plan or the cost is written up and re-approved before the work begins, so a change never reaches you first as a line on an invoice.

You do, from the first commit. Repositories, cloud accounts and domain registrations are in your name and we work inside them. There is nothing to transfer at the end, because none of it was ever ours.

Find out whether this needs building or configuring

Bring the spreadsheet, or the system you have outgrown, to the call. One conversation is usually enough to establish whether what you are describing is a build, or a configuration of something that already exists. We would rather tell you it is the second.