A workflow that fits
Represent the real roles, approvals, exceptions and information behind the operation.
Custom software development
Custom software development for your business workflows.
Greenwall designs and builds web applications, internal tools and connected business systems when off-the-shelf software does not fit. We work remotely across Bulgaria and Europe, with client-site work in Sofia by arrangement.
The context
Begin with the operating problem, then choose the technical shape.
A useful custom system reflects responsibilities, decisions and exceptions—not only a list of screens. Discovery brings product, operational and technical context together before effort is committed to the wrong boundary.
Delivery can cover a focused application or a component within a wider platform, from data modelling and APIs to a TypeScript interface, automated checks, containerised deployment and production diagnostics.
Business outcomes
What a well-shaped custom system should improve
The software earns its place by making important work clearer, safer or faster.
A maintainable product boundary
Separate responsibilities and integrations so the system can evolve without unnecessary disruption.
A credible route to production
Treat tests, deployment, security, visibility and handover as part of the product—not late additions.
Selected capabilities
What the work can include
The exact combination follows the problem, the existing environment and the people who will own the result.
- Business discovery, domain modelling and release definition
- Web applications and back-office interfaces with TypeScript
- Java and Spring services, REST APIs and relational data models
- Authentication and authorisation with OAuth 2.0 and JWT
- External service, payment, device and operational integrations
- Automated tests, Docker delivery and CI/CD support
- Tracing, logs, metrics and production troubleshooting
Working process
From uncertain requirement to useful release
- 01
Frame the decision
Identify the users, business outcome, constraints and evidence needed for a responsible start.
- 02
Model the system
Define core data, workflows, boundaries, integrations and non-functional needs.
- 03
Build and validate
Deliver working increments and test them against realistic operating scenarios.
- 04
Deploy and learn
Release with visibility, support the first use and turn production feedback into priorities.
Relevant experience
Relevant delivery patterns
Experience spans systems used by staff, partners and end customers in different operating environments.
Back-office and ERP-style workflows
Full-stack work has connected operational records, roles, external APIs and day-to-day administrative decisions.
Read the operations platform case studyReservations, ticketing and payments
Delivery has covered customer journeys, scanning and validation, e-commerce integrations and operational tooling.
Access control and connected devices
Applications have coordinated desktop software, server-side services, databases and MQTT-connected hardware.
Good fit
When custom software is a sensible choice
Your workflow is a real differentiator
Generic tools force important work into awkward manual steps or hide the decisions that matter.
Existing systems need a usable bridge
The goal is not to replace everything, but to connect and improve what already carries value.
A product needs experienced delivery
You need one partner who can move between business context, implementation and production reality.
Questions
Custom software questions
Do we need a complete technical specification first?
No. Start with the workflow, users, current systems and desired change. A paid initial assessment can produce a process and data map, risks, priorities and a proposed first release. Its scope and deliverables are agreed before work begins.
What determines the cost of custom software?
The main factors are workflows and exceptions, user roles, integrations, data migration, security requirements, testing and support. We establish these boundaries before proposing an implementation scope and price; a screen count alone is not a sufficient estimate.
What will we receive and how is the work accepted?
The proposal defines the application functions, integrations, tests, deployment and documentation included in the work. Acceptance criteria describe how agreed scenarios will be demonstrated and checked, so both sides can distinguish a completed step from a request to expand the scope.
How are handover and ongoing support arranged?
Code access, usage rights, documentation, deployment responsibilities and knowledge transfer are agreed in the contract. Ongoing maintenance, response expectations and future development need an explicit scope; they are not assumed to be included indefinitely in the initial build.
Can the work extend an existing product?
Yes. Existing code, integrations and operating constraints can be assessed before deciding whether to extend, isolate or replace a part of the system.
Which technology will be used?
The choice follows the product context, team, integrations and operational needs. Greenwall has practical experience across Java and Spring, TypeScript interfaces, SQL data and cloud/container delivery.
Contact
Explore whether custom software is the right next step.
Share the workflow, current constraints and outcome you want to make possible.