You will get a full backend audit - API, database & infrastructure risk assessment
Top Rated
Project details
You will get a full backend audit covering your API architecture, database performance, and cloud infrastructure – with a prioritized roadmap to fix what's actually slowing you down or putting you at risk.
We work daily across Node.js, Nest.js, Express.js, Laravel, and Symfony, with deep experience in PostgreSQL, MongoDB, AWS, Docker, and NGINX – so we review your setup with real production context, not a generic checklist.
Red Carlos Solutions has rescued and scaled backend systems for startups, fintech, and e-commerce clients across North America and Europe. We know how to spot the difference between a minor inefficiency and a scaling bottleneck that will break under real load.
We work daily across Node.js, Nest.js, Express.js, Laravel, and Symfony, with deep experience in PostgreSQL, MongoDB, AWS, Docker, and NGINX – so we review your setup with real production context, not a generic checklist.
Red Carlos Solutions has rescued and scaled backend systems for startups, fintech, and e-commerce clients across North America and Europe. We know how to spot the difference between a minor inefficiency and a scaling bottleneck that will break under real load.
Programming Languages
PHP, JavaScript, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$650
|
Standard
$1,300
|
Advanced
$2,200
|
|---|---|---|---|
| Delivery Time | 5 days | 9 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Live Walkthrough Call
(+ 2 Days)
+$120
Re-Audit After Fixes
(+ 5 Days)
+$400
Infrastructure Deep Dive
(+ 6 Days)
+$500Frequently asked questions
28 reviews
(26)
(2)
(0)
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This project doesn't have any reviews.
BH
Brian H.
May 20, 2026
Backend Developer HMRC MTD Integration
MA
Manuel A.
May 4, 2026
Full Stack / Next.js Developer for Ongoing Feature Development (Fixed-Price Feature Tickets)
AS
Aleem S.
Apr 10, 2026
Fix Billing Calculation Bug (New Client Discount) + Install Facebook Pixel & PayPal Integration
PB
Prakash B.
Mar 12, 2026
Laravel Payments Architect — High TPS Async Review & Optimize
Here is a ~1000-character professional Upwork review for Pavlo and the Red Carlos Solutions team:
We had the pleasure of working with Pavlo and the team from Red Carlos Solutions during a particularly critical phase of our project where we required expert Laravel support for debugging, code review, and system stabilization. Their team demonstrated exceptional technical expertise in Laravel and quickly understood the architecture and complexities of our application.
Pavlo and his team were highly responsive, professional, and extremely efficient in diagnosing issues and identifying the root causes of several problems in the codebase. Their debugging process was structured and precise, and their recommendations during the code review were very valuable in improving the overall stability, performance, and maintainability of our system.
What stood out most was their ability to step into an ongoing project, understand the environment quickly, and deliver practical solutions within tight timelines. Communication was clear and collaborative throughout the engagement.
I strongly recommend Pavlo and the Red Carlos Solutions team to anyone looking for experienced Laravel experts capable of handling complex technical challenges.
We had the pleasure of working with Pavlo and the team from Red Carlos Solutions during a particularly critical phase of our project where we required expert Laravel support for debugging, code review, and system stabilization. Their team demonstrated exceptional technical expertise in Laravel and quickly understood the architecture and complexities of our application.
Pavlo and his team were highly responsive, professional, and extremely efficient in diagnosing issues and identifying the root causes of several problems in the codebase. Their debugging process was structured and precise, and their recommendations during the code review were very valuable in improving the overall stability, performance, and maintainability of our system.
What stood out most was their ability to step into an ongoing project, understand the environment quickly, and deliver practical solutions within tight timelines. Communication was clear and collaborative throughout the engagement.
I strongly recommend Pavlo and the Red Carlos Solutions team to anyone looking for experienced Laravel experts capable of handling complex technical challenges.
CO
Chris O.
Dec 2, 2025
PWA Development for Existing iOS App
This team is great to work with. They completed all the tests on time and handed in the job very professionally.
About Pavlo
Full Stack Developer | Backend developer | Node.js | React
100%
Job Success
Kiev, Ukraine - 12:33 pm local time
✉️ 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗠𝗘
I typically respond within 12 to 24 hours, and urgent projects can be prioritized.
I lead a senior engineering team that builds, scales, and rescues complex web and mobile products. Whether you need a single Senior Full-Stack Engineer or a dedicated team that plugs in and ships from day one – we move fast and deliver production-grade results.
Over 50+ completed projects, we've helped startups and scale-ups go from prototype to release, and stepped in as the core engineering team when products needed to grow. We work primarily with Node.js and Nest.js on the backend and React / Next.js on the frontend – the same stack that powers most modern, high-load SaaS platforms.
🎯 WHAT YOU GET WHEN YOU HIRE US
– 100% completion rate – every project delivered, backed by a 100% Job Success Score across 6000+ hours on Upwork
– Fast start & team scaling – we onboard in days, not weeks, and scale the team up or down as your roadmap demands
– AI-accelerated delivery – we integrate AI tools into our development process to improve code quality and ship faster
– Full cycle – from prototyping and UX to architecture, development, and release
🏆 RESULTS
"I highly recommend Pavlo - he will be my goto next time for any work like this. He understood exactly what I needed and was really fast to act. One of the best freelancers Ive used on Upwork!"
– Lauren B., Client
"Pavlo and his team were highly responsive, professional, and extremely efficient in diagnosing issues and identifying the root causes of several problems in the codebase. Their debugging process was structured and precise, and their recommendations during the code review were very valuable in improving the overall stability, performance, and maintainability of our system."
– Client, Product Manager, SaaS Platform
SELECTED PROJECTS
– CaJu AI – an enterprise AI platform with real-time AI workflows, scalable Node.js backend services, and React-based interfaces for compliance-focused customer support automation.
– CookieFirst – a large SaaS platform where we became the core engineering team, scaling the product, expanding functionality, and improving performance.
– Ragusa Express – a booking platform with online reservations, payments, backend modernization, and React frontend improvements.
TECHNICAL STACK
Backend: Node.js, Nest.js, Express.js, Laravel, Symfony (TypeScript, PHP, Python)
Frontend: React, Next.js, Vue.js, Tailwind CSS, SCSS/Sass
Mobile: React Native, Java, Kotlin, Swift
Cloud & Tools: AWS, Docker, NGINX, Supabase, PostgreSQL, MongoDB, DevOps, Figma
If you're looking for a reliable Senior Full Stack partner who works in Node.js, Nest.js, and React and can take ownership from idea to launch – send me a message and tell me about your project.
ENGAGEMENT MODELS
You can bring on a single Full Stack Developer for focused feature work, a dedicated Backend Developer to own your Node.js services, or a full pod combining Full Stack Developer and Backend Developer roles with a React specialist on top. Most clients start with one Full Stack Developer or one Backend Developer and scale up once trust is established – we've grown from a single Node.js Backend Developer to an eight-person team on more than one long-term engagement.
WHY NODE.JS AND REACT
We standardized on Node.js and React because they let a single Full Stack Developer move across the stack without context-switching, and they give a Backend Developer and a React engineer a shared language when APIs and UI need to evolve together. A Node.js Backend Developer on our team typically ships REST or GraphQL services that a React frontend consumes within the same sprint, which is the main reason clients hire a Full Stack Developer from us instead of stitching together separate backend and frontend contractors.
A FEW THINGS CLIENTS ASK BEFORE HIRING
Can I hire just one Backend Developer? Yes – many engagements start with a single Backend Developer handling Node.js architecture while we hold a Full Stack Developer in reserve for later.
Do you offer a trial period? Yes, a short paid trial with one Full Stack Developer or Backend Developer is the easiest way to check fit before scaling the team.
Can you work backend-only? Yes – some clients only need a Node.js Backend Developer, others need a full Full Stack Developer team covering React end to end.
Whether you need a Full Stack Developer or a Backend Developer, message me with your stack and timeline and I'll match you with the right Full Stack Developer from the team within 24–48 hours.
Best regards,
Pavlo
Jedi at Red Carlos Solutions
Steps for completing your project
After purchasing the project, send requirements so Pavlo can start the project.
Delivery time starts when Pavlo receives requirements from you.
Pavlo works on your project following the steps below.
Revisions may occur after the delivery date.
Repository & Environment Access
We review the repo, database structure, and any documentation you've provided to scope the audit accurately.
API & Code Review
We analyze endpoint design, error handling, and code quality across your backend stack (Node.js/Nest.js/Laravel/Symfony).