Custom Web Application Development
Web applications built around how your business actually works, from first workflow to a maintained production system.
Software service
API Development and Integration
Reliable APIs for your applications and integrations that connect payment, shipping, CRM and other third-party services.
About this service
Most businesses run on several systems that need to share data. We design APIs for your own applications and connect the services you already use, so information moves automatically instead of by copy and paste.
How we work
We document each API before building it, validate every input, and handle the failure cases: timeouts, retries, duplicate webhooks and rate limits. Integrations are logged so problems can be traced, and credentials stay in server-side configuration.
How the work is scoped
Share the systems to connect, the records involved and the operations each system must support. We agree request and response formats, authentication, access boundaries, timeouts and failure handling. Available provider documentation and test environments determine what can be verified before release. The integration is designed around repeatable operations, including duplicate messages and delayed responses.
Scope and exclusions
Provider subscriptions, undocumented vendor changes and unrelated application redesign are outside a single integration scope. We cannot promise availability of a third-party system. Any bulk historical sync is agreed separately from ongoing event delivery.
A practical example
An order API could accept a confirmed purchase, request a shipment and store the carrier reference. A repeated webhook should update the same record instead of creating a second shipment. This is an example acceptance scenario, not a claimed client implementation.
Pricing and handover
Work is quoted after the requirements and acceptance checks are agreed. The handover covers the delivered changes, verification notes and operating instructions for the agreed scope. Further releases and ongoing maintenance are optional and scoped separately.
Context photograph by Brett Sayles / Pexels, cropped under the Pexels License. This is a sourced photograph, not a client project or our office.
Problems it solves
- Data copied by hand between systems
- Integrations that fail silently or create duplicate records
- No documentation for the APIs your apps depend on
Key benefits
- Less manual data entry and fewer copy errors
- Integrations that recover from errors and leave a trace
- Documented APIs your team or partners can build on
What you receive
- API design and OpenAPI documentation
- Implemented endpoints or integrations with tests
- Webhook handling with retries and idempotency
- Monitoring and error logging
Guides for your next step
- Guide
Consistent API error responses with RFC 9457 Problem Details
Every HTTP API needs an error format, and most teams invent their own. RFC 9457 defines a standard one: application/problem+json. This guide explains its members, shows validation and business-rule examples, and covers design and security rules for adopting it.
Prepare the scope with this guide: Consistent API error responses with RFC 9457 Problem Details. Its implementation choices should be reviewed for your project.
- Guide
How to build a JSON REST API with CodeIgniter 4.7
A step-by-step CodeIgniter 4.7 tutorial: create a books API with a migration, a validating model, the new API transformers, resource routes and paginated JSON responses, then test every endpoint with curl.
Prepare the scope with this guide: How to build a JSON REST API with CodeIgniter 4.7. Its implementation choices should be reviewed for your project.
- Guide
How to build a JSON REST API with CakePHP 5.4
A step-by-step CakePHP 5.4 tutorial: resource routes under an /api prefix, JsonView serialisation, bounded pagination, 201/204/422 status codes, JSON error bodies, CSRF handling for stateless clients and an integration test.
Prepare the scope with this guide: How to build a JSON REST API with CakePHP 5.4. Its implementation choices should be reviewed for your project.
Related implementation tools
- Directory profile
Postman
API platform for designing, testing, documenting and monitoring APIs, with desktop and web apps, a CLI and a free plan.
Request collections help document and verify the APIs used by this implementation.
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GitHub
Git-based platform for hosting code, reviewing pull requests, tracking issues and running CI/CD workflows, with free and per-user paid plans.
Reviewed changes, issue tracking and a shared repository support implementation and handover.
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Tell us what you need
A short message is enough: what the software should do, what is in the way, and any deadline. We reply by email.