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Code review

Bugs caught early cost 100x less to fix. Let our senior engineers review your codebase with a fresh eye and optimize it for security, performance, and maintainability.

22+

years of code review experience

40+

clients worldwide

150+

in-house employees

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What we audit

We look beyond surface issues. Below are the key directions we focus on:

  • Backend

    • Code structure and readability
    • Logic and error handling
    • API design and versioning
    • Microservices communication
    • Performance under load
    • Tech debt and outdated libraries
    • Scalability and extensibility
  • Frontend

    • Code modularity and organization
    • State management strategy
    • Reusability of components
    • UI responsiveness and rendering time
    • Browser compatibility
    • Error handling in the UI
    • Framework version issues
  • Infrastructure

    • CI/CD pipeline quality
    • Cloud configuration and resource usage
    • Deployment and rollback processes
    • Server environments and scaling
    • Logging and monitoring practices
  • Database

    • Schema design and normalization
    • Query performance
    • Indexing and constraints
    • ORM usage patterns
    • Scalability risks
    • Data validation logic
  • Security

    • Search for vulnerabilities (e.g., SQL injection, XSS, CSRF)
    • Review of authentication and authorization logic
    • Data encryption and storage safety
    • Session and token handling
    • Use of vulnerable libraries
    • Access control policies
  • UI/UX

    • Navigation and user flow
    • Accessibility (contrast, keyboard navigation, etc.)
    • Feedback elements (loading states, confirmations, etc.)
    • Layout clarity
    • Bottlenecks in user actions

Code review services we offer

Encryption errors:

  • weak encryption algorithms or strong encryption algorithms with weak implementation (e.g., insecure key storage).
  • Code injection vulnerabilities.
  • XSS (cross-site scripting) vulnerabilities.
  • Auditing and logging mechanisms.
  • Input/data validation mechanisms.
  • Impersonation/delegation mechanisms.
  • Session management.
  • Communication security.
  • The security of connection strings.
  • Input/output operations security.
  • The presence of serialization filtering.
  • Reflection mechanisms.
  • The presence of obfuscation.
  • Checking if the code is thread-safe.

In addition to SAST and manual review of code security, we check:

  • If descriptive names for code variables are in place.
  • If comments about what particular code functions and methods do are present.
  • If documentation on what the whole code does and what its dependencies are is in place.
  • If the developers can take advantage of ready frameworks and reusable components to get work done faster.
  • If the practice of splitting code into shorter units is observed.
  • If the code is portable.
  • If effective version control is implemented.
  • If linter tools (SonarQube, ESLint) are used.
  • If exception-handling mechanisms are effective.
  • If the required security mechanisms are in place, and more.

Not sure what you need?

Let us help you match your needs to the right type of audit. We’ll guide you through the options and recommend what fits best.

AI-enhanced code review & development

AI won’t replace a human expert, but it can be a smart assistant when used right.

Our engineers use AI tools to generate sample unit tests for uncovered logic, speed up documentation and code summarization, help write mock data generators, suggest potential refactoring ideas, and auto-generate code snippets for repetitive patterns.

This means faster reports, better coverage, and examples you can immediately use. We also offer the following AI services:

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    AI development

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    AI consulting

    • Code security analysis with AI tools
    • Smart linting
    • AI-driven code suggestions
    • Custom research
    • Data preparation and quality checks
    • AI readiness assessments for products or teams

Want AI to work for you?

We can help you integrate AI tools into your development process for real productivity gains. Talk to us about how AI can support your software development – whether it’s improving testing, documentation, or reducing overhead. Our team builds AI-powered tools, too.

When do you need code review?

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If you answered ‘yes’ to at least one – it’s time for a code review.

Need help now?

We’ll help you choose the right audit type and assign the best experts for your tech stack.

Why code review matters

  • Catch bugs early

    Fixing issues later in production is 100x more expensive.

  • Uncover tech debt

    See what slows your team down and how to fix it.

  • Boost security

    Find hidden vulnerabilities before someone else does.

  • Build maintainable code

    Make future changes easier and faster.

  • Comply with regulations

    Meet industry standards (HIPAA, GDPR, etc.) and pass security audits with confidence.

  • Improve performance

    Identify bottlenecks that cost you time and resources.

Why choose Aristek for your code review?

  • Commitment to data privacy

    We comply with GDPR, CCPA, HIPAA, IMS, WCAG, OWASP, and X12 standards. ISO 9001 certified.

  • Strong industry focus

    With experience across 15+ industries, we understand real-life challenges.

  • Transparent costs & timelines

    No vague numbers. No hidden fees. Just clear estimates and delivery.

  • Qualified experts

    95% of our employees have BS, MSc, or PhD degrees.
    88% of them are senior/middle-tier developers.

  • AWS and Microsoft Azure partnership

    We’re AWS and Microsoft Azure partners – ready to support your cloud-based workflows.

  • Flexible engagement

    From one-off audits to continuous code reviews – we adjust to your needs.

How we approach code review

We prioritize precision, transparency, and practical results. Here’s how we do it:

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  • Code review request

    We clarify your goals and estimate the effort involved.

  • Signing NDA & the contract

    Before reviewing any code, we ensure confidentiality.

  • Define code review criteria

    We define clear rules based on your stack, best practices, and industry standards.

  • Code review

    We check for maintainability, performance, security, and more – with issues ranked by severity.

  • Detailed feedback

    You receive a clear, actionable report with suggestions and reasoning.

  • Collaborative discussion

    We walk your team through the findings and answer any questions.

  • Final presentation

    You get the final audit report – a clear view of strengths and gaps.

Services built around what your business really needs

Technologies we are experts in

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AWS
Google cloud AI platform
Azure cognitive search
Keras
TensorFlow lite
PyTorch
NymPy
Learn scikit

Any questions left?

Let’s talk about your project and how we can help.

Frequently Asked Questions

Code review makes code easier to maintain and scale. We help applications run faster, use less resources, and keep your data secure. Our developers identify poor coding practices, and suggest improvements.

Code review by expert developers is crucial for building applications that are scalable, maintainable, performant and secure over the long-term. When done thoroughly, reviews uncover defects and vulnerabilities that can severely impact customer experience, compliance, costs and company reputation if left undetected.

Our code review services help strengthen both code quality and security through systematic inspection augmented by automated analysis tools for comprehensive coverage. We identify common pitfalls like performance bottlenecks, memory leaks, overflow errors, race conditions, injection attacks and more based on institutional best practices.

Beyond just finding flaws, our reviewers work collaboratively with your engineers to drive improvements by explaining problems, suggesting solutions, illustrating better approaches and sharing knowledge. Reviews enhance application architecture, modularization, testability and overall quality for easier ongoing maintenance. They help ensure designs scale smoothly for rising data and user volumes without degradation.

Proactively building in security and efficiency from initial stages via expert code reviews saves significant time and costs compared to remediating issues after launch. We help applications use resources optimally, close vulnerabilities early and meet quality standards for smooth user experience that bolsters customer loyalty. Our reviews provide affordable peace of mind that your codebase upholds reliability, safety and performance standards for business growth.

We offer automatic and manual code review services, as well as all-round SDLC code review. We review both backend and frontend.

We support PHP, Ruby on Rails, Java, .Net, and many other technologies. For the full list, head to our technologies page.

Sure, especially if we can sync with your Git repository. Reach out for more details.

Basically, we’ll find ways to make your code better. We look for vulnerabilities, style adherence, regulatory compliance and areas of technical debt.

We’ll see what concerns you the most. And you can treat us as the second set of eyes for your project.

At its core, our code review service essentially provides the benefits of a fresh, objective and experienced second set of eyes closely examining your software. We take the time to thoroughly understand your unique priorities and constraints to customize an actionable review plan targeting the quality aspects that matter most.

Whether your top concern relates to identifying security vulnerabilities early before launch, or ensuring future maintainability and scalability with modular architecture, or unveiling hidden bottlenecks that could degrade performance over time, our findings will uncover actionable insights tailored to your roadmap.

We dig deeper through manual inspection augmented by automated static analysis tools for industry best practice validation across areas like input sanitization, memory safety, encryption standards and more based on institutional knowledge. Developers and security researchers assigned to your review have specialized expertise across programming languages, frameworks, cloud platforms and applications.

Beyond just surfacing defects, we take a collaborative approach focused on enrichment. Our final deliverables highlight areas not simply needing rework, but rather guiding internal teams towards tangible improvements by illustrating patterns for enhancing reliability, performance efficiency, test coverage and overall quality attributes.

In essence, we go beyond being a purely transactional quality gate. Our review partnerships aim to drive lasting lifts in organizational knowledge, better design paradigms and adherence to policies for sustaining trust and excellence at scale as teams grow. We help make your codebase its best version from both business impact and technological perspectives.

The final report is a detailed .PDF file. We’ll present it to you, explain our suggestions and let you think about it. You can take your time and discuss the code review with us at any moment.

We’ll sign an NDA and store your code and test data on servers with ISO 27001 security standards.

Our developers will integrate with your Git repository. It could be GitHub, GitLab, Bitbucket, or anything else.

At any moment, you can revoke Git access to our developers. After that, we won’t be able to view the code.

Basic reviews don’t need much context. After all, code is code both in eLearning and finance. We can assess the basics like coding styles, algorithm design, and scalability potential – all with just a bit of context.
But if you need complex analysis, deep dive into project context is crucial.

I can provide more project context. Project context reveals the big picture—beyond code quality. We’ll not just look at the code, but also at what functions it serves.

We can reduce unnecessary resources. Sometimes we’ll find that your project uses lots of resources, but we need context to understand if you want it that way. Simply put, both NASA databases and Instagram keep pictures of the night sky. But for Instagram posts, you don’t need giant 1.7GB files.

We can check if the code complies with your laws and regulations. They can be very specific. Here are just a few examples: GDPR requires encrypting sensitive data, while ADA requires full keyword accessibility for all functions.

We want to serve our clients as best as we can, so open discussions are the key. That’s why we can adjust the review criteria whenever you need it.

The review will have practical suggestions on how to improve your code. We’ll provide detailed instructions for your development team.

And if you need an extra pair of hands working on the improvements, we offer staff augmentation services. That said, we’ll not try to oversell. Not all improvements are critical, and we get this.

Our developers are in Europe, most working in Central European Time. We work in 7+ countries and can adjust to your working hours.
Most of our partners are located in the US, EU, and the Gulf – so we have no communications issues.

Your code will be reviewed by our best developers. They are practicing experts, not just theory-driven consultants. That’s why they typically work on other projects as well.

So timeframes are individual. If you have a strict deadline, we will catch up quickly. If you have a month or two, the code review will be cheaper. In any case, we guarantee quality reviews regardless of your timeframe.

Need recurring code reviews (weekly, monthly, quarterly, or yearly)? We can schedule them as well.

It typically ranges from 2 weeks to about a month. This depends on the depth of the code review and how often we can discuss it.

We want what’s best for you, so we listen carefully. You’ll set the review criteria, and we’ll make our suggestions accordingly.

Some issues are critical, others are mere suggestions. And we understand that done is better than perfect.

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