How quickly can you start?

For urgent production issues we can usually begin triage within a few days of access being granted.

Will you rewrite everything?

Rarely. Most stability problems can be fixed in place. We only recommend rebuilding a part of the system when fixing it would genuinely cost more.

Do you need access to production?

Read access to logs and monitoring helps a great deal. Changes go through your repository and deploy process, and you control every permission.

How do you price this?

Either a fixed-price stabilisation sprint after the audit, or a monthly retainer when the work is ongoing. The audit itself is a small fixed fee.

What languages and frameworks do you cover?

Mainly JavaScript and TypeScript (React, Next.js, Node.js), Python, PHP and the common databases. Ask us about anything else; we will tell you honestly if it is outside our depth.

ServicesEngineering

Bug Fixing & Stability Engineering

Find, reproduce, and fix issues across React/Next.js, Node/Express, Python APIs, Android, and Shopify/WordPress. Add tests, logging, and monitoring to prevent regressions and keep releases stable.

Start your project How we deliver

First findings: Within the first week
Typical engagement: 2 to 8 weeks
Model: Fixed sprint or monthly retainer

Overview

From fragile to dependable, one root cause at a time.

When software crashes, slows down or breaks every time someone ships a change, the cost is more than the bug itself. It is lost customers, a support queue that never empties and a team afraid to touch the code. We fix the immediate problems and the reasons they keep happening.

We begin by making the system observable: error tracking, logs and performance monitoring, so decisions are based on what is actually failing and how often. From there we fix issues in order of business impact and add tests around every fix so the same problem cannot quietly return.

The work ends with a codebase your team can change with confidence: a regression suite, a deploy pipeline that catches mistakes before customers do, and clear notes on the risks that remain.

Built for

Products with frequent crashes, errors or slow pages
Teams that inherited a codebase from a previous agency or developer
Companies about to scale who need confidence the system will hold
Founders who need a stable product before raising or selling

What you get

Everything it takes, in one engagement.

Every part of bug fixing & stability engineering handled by one senior team, so nothing falls between suppliers and you always know who owns the result.

01

Codebase and risk audit

A structured review of architecture, dependencies, security and test coverage, with findings ranked by business risk.

02

Observability setup

Error tracking, structured logging, uptime checks and performance monitoring, so problems are visible before users report them.

03

Root-cause fixing

We trace each failure to its source and fix that, rather than adding another workaround on top.

04

Performance tuning

Slow queries, heavy pages, memory leaks and inefficient code paths found with profiling and fixed with measurements.

05

Automated testing

Unit, integration and end-to-end tests around critical journeys, so every future change is checked automatically.

06

Safer releases

CI pipelines, staging environments and rollback paths that make deploying a routine event instead of a risk.

Deliverables

What lands in your hands.

Audit report with prioritised findings
Error tracking and monitoring in place
Fixed critical and high-priority issues
Regression test suite for key journeys
CI pipeline with automated checks
Stability roadmap for the remaining risks

The stack

Tools we trust in production.

Proven, well-supported technology chosen for your product, not for our habits. Everything here is something we run in production.

12 technologies

Sentry
Datadog
Grafana
Prometheus
Playwright
Cypress
Jest
Vitest
TypeScript
Node.js
Python
GitHub Actions

Why it matters

What this does for your business.

How we deliver it

From first call to shipped.

A planned, transparent arc with something you can see every week, so you always know exactly where the work stands.

01

Triage

Days 1 to 3

We get access, reproduce the urgent issues and stop any active damage first.

02

Instrument and audit

Week 1

Monitoring goes in and the codebase is reviewed, giving a clear, ranked picture of what is wrong.

03

Fix by impact

Weeks 2 to 6

Issues are resolved in order of business impact, each with a test that proves it is fixed.

04

Guard the gains

Final weeks

Regression tests, CI checks and release practices that keep the system stable as work continues.

05

Hand over or stay on

Ongoing

A written summary of what changed and what remains, with optional ongoing maintenance.

Engineering

Example engagement

A software company inherits a product that crashes weekly. We add error tracking and tests, fix the root causes in order of impact and hand back a stable platform with a regression suite guarding every future release.

Talk to us about a project like this

FAQs

Questions we hear a lot.

Something else on your mind? Ask Luma in the corner, or reach the team directly.

Ask a question

Yes, that is most of this work. We start with an audit so we understand the codebase before changing it, and we document what we learn as we go.

Often paired with

Explore related services.

All services