Atembo
Custom Software Development

Production-grade software, built to be operated for years.

We design and build backend systems, web applications, and API platforms where reliability, clarity, and maintainability matter as much as the first release.

Business challenges

What usually brings teams to us.

Most software cost is incurred after launch. We optimise for the years that follow: explicit domain models, tested behaviour, observable runtime, and code a new engineer can understand in a week rather than a quarter.

  • Systems that resist change

    Every new feature takes longer than the last because responsibilities are tangled and nobody is sure what a change will break.

  • Performance under real load

    An application that worked for the first thousand users slows down, times out, or fails unpredictably as data and traffic grow.

  • Ageing core platforms

    Critical business logic lives in a legacy system that is expensive to run, hard to staff, and risky to touch.

  • Off-the-shelf limits

    Packaged software covers 70% of the need, and the remaining 30% — the part that differentiates the business — is forced into workarounds.

Solutions

What we deliver.

  • Backend development

    Services in Go and other proven stacks, with clear module boundaries, explicit error handling, and automated tests at the right levels.

  • Web applications

    Server-rendered and interactive web applications that load fast, work on every device, and meet accessibility standards.

  • API platforms

    Versioned, documented REST and event APIs with authentication, rate limiting, and contracts that partners can build on with confidence.

  • Distributed systems

    Services that communicate reliably across process and network boundaries, with idempotency, retries, and failure modes designed up front.

  • Legacy modernization

    Incremental replacement of legacy components behind stable interfaces, so the business keeps running while the platform improves.

  • Performance optimization

    Profiling-led improvements to latency, throughput, and resource usage — measured before and after, not guessed.

  • Database architecture

    Schema design, indexing, query optimisation, and migration strategies for PostgreSQL and other relational and document stores.

  • System integrations

    Connecting new software to the systems the business already depends on, with clear ownership of data and failure handling.

Typical use cases

Where this work tends to start.

Representative scenarios, described generally — not client case studies.

Replacing a spreadsheet-driven process

Turning a business-critical process that lives in shared spreadsheets into an application with roles, validation, history, and reporting.

Modernising a monolith

Extracting high-change or high-load parts of an ageing application into well-defined modules or services without a risky rewrite.

Building a partner API

Exposing internal capabilities to customers or partners through a secure, documented, and versioned API.

Stabilising a struggling platform

Diagnosing reliability and performance problems in an existing system and fixing root causes rather than symptoms.

Delivery approach

How we run it.

  1. 01

    Understand the domain

    We map the business rules, data, and constraints before writing code, and agree on what success looks like.

  2. 02

    Design the architecture

    We choose the simplest structure that meets the requirements and document the decisions that shape it.

  3. 03

    Deliver incrementally

    Working software ships in small, reviewable increments with automated tests and continuous integration.

  4. 04

    Operate and hand over

    We prepare monitoring, runbooks, and documentation so the system can be run and evolved by your team or ours.

Related services

Often delivered together.

Enterprise Integrations Clean connections between ERPs, CRMs, and internal tools, so data moves once and stays right. Cloud & Platform Architecture Observable, secure infrastructure with costs you can predict and explain. SaaS Product Engineering From first architecture decision to multi-tenant production, billing, and growth.

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