Code and System Reviews

Independent assessment of your codebase, architecture, and development processes - identifying technical debt, security risks, scalability limitations, and quality issues, with clear, prioritised, actionable recommendations.

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Code and System Reviews

We conduct thorough code and system reviews for businesses and development teams across the UK and Isle of Man. Independent assessment of your codebase, architecture, and development processes - identifying technical debt, security risks, scalability limitations, and quality issues, with clear, prioritised, actionable recommendations.

Code reviews by an experienced external engineer reveal problems that internal teams cannot see because they are too close to the code, or that junior teams cannot see because they do not yet have the experience to recognise them. A review conducted before a significant investment - in new features, in a platform migration, in a team expansion - is far cheaper than discovering the same problems after that investment has been made.

Every code and system review we conduct is the work of Owen Jones, OLXR's founder and lead engineer. We review code at the level of production engineers who have seen the consequences of the problems we identify - not at the level of theoretical checklists.

Who This Is For

Businesses considering a significant investment in an existing codebase and wanting an independent assessment before committing
Organisations that have acquired software or a technical team and need to understand what they have
Development teams that suspect they have significant technical debt but need an external perspective to quantify and prioritise it
Businesses whose software is experiencing reliability, performance, or security problems whose root causes have not been identified
Companies whose development velocity has slowed significantly and who want to understand the technical causes
Investors conducting technical due diligence on a potential acquisition or investment target

What We Deliver

Code Quality Assessment

Evaluation of code structure, patterns, maintainability, test coverage, and technical debt.

Architecture Review

Assessment of system design against current and anticipated requirements.

Security Assessment

Identification of common security vulnerabilities and misconfigurations.

Performance Review

Identification of performance bottlenecks, inefficient queries, and scalability limitations.

Dependency Audit

Assessment of third-party dependencies for currency, security, and licensing risk.

Development Process Review

Assessment of version control practices, deployment processes, and engineering workflow.

Prioritised Recommendations

Findings organised by severity and effort, with clear next steps for each.

Walkthrough & Discussion

Review findings with your team in session, with context and answers to follow-up questions.

Our Approach

1
Review at the Right Level

A useful code review is not a checklist exercise - it is an assessment conducted by an experienced engineer who understands what the code is trying to do and can identify the ways in which it fails to do it well. We read the code with the goal of understanding the system, identifying the patterns being used and whether they are appropriate, and finding the specific issues that create real risk or real cost - not generating a long list of style violations.

2
Provide Actionable Findings

A review that identifies problems without providing actionable guidance for addressing them is only half useful. For every significant finding, we provide a clear explanation of the problem, the risk or cost it creates, and specific recommendations for addressing it. We also prioritise findings by their severity and the effort required to address them, so that the review output is a workable action plan rather than an overwhelming list.

3
Be Constructively Honest

Code reviews are useful because they are honest. We identify problems clearly and explain their consequences accurately - which can be uncomfortable when significant investment has already been made in the code being reviewed. We deliver difficult findings constructively, with the context needed to understand them and the recommendations needed to address them. The goal is to give you the information you need to make good decisions, not to make you feel good about decisions already made.

Frequently Asked Questions

It depends on the size and complexity of the codebase. A focused review of a single application or service typically takes two to five days. A comprehensive review of a larger system with multiple components can take one to two weeks. We scope the review during an initial conversation and give you a clear estimate of the time and cost before starting.

You receive a written report documenting all significant findings, organised by category and priority. Each finding includes a description of the issue, the risk or cost it creates, and specific recommendations for addressing it. For architectural findings we include diagrams where they aid understanding. We also conduct a walkthrough of the findings with your team to ensure the recommendations are understood and questions can be answered.

Our primary expertise is in C#, .NET, and related Microsoft technologies, with strong competence in JavaScript, TypeScript, and React. For codebases in other languages, we assess on a case-by-case basis. Architectural problems, security vulnerabilities, and process issues are often language-agnostic and can be identified regardless of the specific technology. Where a codebase is entirely outside our expertise, we will tell you that rather than conduct a review we cannot do justice to.

Related Services

Consultations

Technical consultancy and advice
Architecture and Planning

Software architecture consultancy
Fractional CTO

Senior technical leadership on demand

Ready for an Independent Code Review?

Tell us about the system you want reviewed. We will scope the review and give you a clear estimate.

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