01Independent software engineering
Systems that keep
working after the
project ends.
TREE CORNER LTD designs, builds and maintains software for organisations that depend on it daily. We write down what we are going to do, build it in reviewable increments, and hand over systems your own people can operate.
Written enquiries: [email protected]
02Overview
Who we are
TREE CORNER LTD is an information technology company working on custom software, web applications, cloud infrastructure and systems integration. Our work is delivered by engineers who stay with a project from the first scope discussion through to operation.
We take on a limited number of engagements at a time. That constraint is deliberate: it keeps the people who wrote the code available to explain it, extend it and fix it. Where a project needs a capability outside our scope, we say so rather than improvise.
Everything we agree is recorded in writing. Scope, assumptions, open questions and decisions live in documents both sides can read, so that the reasoning behind a system remains available long after the conversation that produced it.
03Core capabilities
Four disciplines we practise in depth
- Application engineering
- Backend services, data models, APIs and browser interfaces built as one coherent system rather than assembled parts.
- Infrastructure and operations
- Environments described as code, repeatable deployments, monitoring and logging that make failures visible before users report them.
- Integration
- Connecting applications, databases and third-party services so that data moves predictably and errors surface where they can be handled.
- Verification
- Automated tests, review discipline and release checks applied continuously instead of a phase bolted on at the end.
04Where we are usually called in
Problems that tend to reach us
- A process still runs on spreadsheets and email, and the people maintaining it have become the single point of failure.
- An internal application works but nobody remaining understands how, so every change is risky and slow.
- Two systems hold the same data and disagree, and reconciliation is done by hand.
- Infrastructure was configured manually and cannot be reproduced reliably in another environment.
- Releases are infrequent and stressful because there is no automated way to tell whether a change is safe.
05Services
What we deliver
- 01
Custom software development
Line-of-business systems designed around an actual workflow, not a template.
- 02
Web application development
Accessible, responsive applications with server-rendered performance and predictable state.
- 03
Cloud and infrastructure
Provisioning, networking, deployment pipelines and observability defined in version control.
- 04
Systems integration
Interfaces between internal and external systems, with contracts, retries and audit trails.
- 05
Software modernisation
Incremental replacement of ageing components while the system continues to serve users.
- 06
Technical consulting
Architecture review, technology assessment and written recommendations you can act on independently.
- 07
Maintenance and support
Corrective and adaptive work on systems in production, with agreed response expectations.
- 08
Quality assurance and testing
Test strategy, automation and release verification aligned with the risk profile of the system.
06Technology and engineering
How we make technical decisions
We choose boring, well-documented technology by default. A component with a long support history and a large body of public knowledge is easier to hire for, easier to debug at three in the morning, and easier to hand over.
Architecture follows the shape of the problem. We keep boundaries explicit, avoid distributing a system that does not need distribution, and prefer clear data ownership over clever synchronisation.
Significant decisions are recorded with their context and alternatives, so a future engineer can see why a path was taken and whether the reasoning still holds.
07Delivery process
From written problem to running system
- 01
Discovery
We read what exists, talk to the people who use it, and write down constraints and unknowns.
- 02
Scope note
A short document describing the first increment, what is excluded, and the assumptions it rests on.
- 03
Build increments
Short cycles ending in software running in a shared environment, reviewed together.
- 04
Verification
Automated checks, manual review of risk areas and a release decision made on evidence.
- 05
Handover and operation
Documentation, runbooks and, where wanted, continued maintenance under an agreed arrangement.
08Security and quality
Principles we do not trade away
Least privilege
Access is granted narrowly and reviewed. Credentials live in managed secret storage, never in source control.
Defence in depth
Validation, authorisation and auditing are applied at each boundary rather than trusted to a single layer.
Evidence over assertion
Quality claims are backed by tests, logs and reproducible builds that anyone on the project can inspect.
09Business contexts
Where this kind of work fits
Rather than claim sector expertise we have not documented, we describe the operating contexts in which our approach is generally useful.
Operational back offices
Organisations running internal processes that have outgrown manual coordination.
Service providers
Teams whose product is delivered through software that customers use directly.
Data-heavy workflows
Contexts where records must stay consistent across several systems and be auditable.
Regulated environments
Situations where traceability of changes and access matters as much as the feature itself.
10Why a structured partner
What structure actually buys you
A structured partner reduces the number of decisions that exist only in someone's memory. Requirements, trade-offs and operational knowledge are written down as the work proceeds, which lowers the cost of every future change.
It also makes disagreement cheap. When scope is explicit, a change of direction is a conversation about a document rather than a dispute about what was implied months earlier.
Finally, it protects continuity. Systems built this way can be picked up by another competent team without archaeology, which is the clearest sign that the work was done honestly.
11Collaboration model
How we work alongside your team
Project delivery
A defined outcome, an agreed scope note, and a fixed set of increments leading to handover.
Embedded engineering
Our engineers join your existing process, tools and review cycle for an agreed period.
Advisory
Scheduled review of architecture, delivery practice or infrastructure, returned as written recommendations.
Each model is agreed in writing before work begins, including how communication happens, who decides what, and how the engagement can be ended by either side.
12Questions
Frequently asked
How does an engagement usually begin?
It begins with a written description of the problem you want solved. We review it, ask clarifying questions by email, and return a short scope note describing what we understand, what we would build first, and what remains open.
Do you work on existing systems as well as new ones?
Yes. A large share of practical engineering work involves systems that already run in production. We read the existing code and configuration before proposing changes, and we prefer incremental modernisation over rewrites unless a rewrite is clearly justified.
Who owns the code and documentation?
Ownership terms are set in the written agreement for each engagement. Our default position is that the client owns the delivered source code, infrastructure definitions and documentation produced for their project.
How is progress reported?
Through working software in a shared environment, a written summary at the end of each iteration, and a visible task list. Progress is measured by what runs, not by hours logged.
What technologies do you work with?
Mainstream, well-supported ecosystems for web, backend and cloud work. We select tools per project based on the operating environment, the skills of the team that will maintain the result, and long-term support prospects rather than novelty.
How do we get in touch?
Write to [email protected] with a short description of your situation. Written first contact keeps requirements traceable from the beginning.
13Contact
Written enquiries only
Describe the situation, the constraint you are working within, and what a good outcome would look like. We reply in writing so that the record starts from the first message.
- Company
- TREE CORNER LTD
- [email protected]
- Website
- treecornergroup.com