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You will get bugs, performance and deployment issues fixed in your web app
Top Rated
Project details
Is your web app slow, unreliable, difficult to deploy, or failing in production?
I will help rescue and stabilize your existing React, Next.js, Node.js, or cloud-based SaaS application by finding and fixing the highest-impact technical problems.
This project is designed for founders, CTOs, agencies, and SaaS teams that already have a working product but are struggling with production bugs, poor performance, broken deployments, unstable features, confusing logs, or a codebase that is becoming harder to maintain.
Instead of giving you vague advice, I focus on practical fixes that improve stability, performance, debugging, deployment confidence, and user experience.
Common issues I can help with include slow pages or APIs, broken user flows, frontend and backend bugs, build or deployment problems, environment configuration issues, weak logging, unclear production failures, caching problems, developer-level auth or session issues, CI/CD cleanup, and risky code patterns that cause recurring bugs.
You will receive code changes, pull requests or patches, technical notes, and a clear summary of what was fixed, what improved, and what should be addressed next.
I will help rescue and stabilize your existing React, Next.js, Node.js, or cloud-based SaaS application by finding and fixing the highest-impact technical problems.
This project is designed for founders, CTOs, agencies, and SaaS teams that already have a working product but are struggling with production bugs, poor performance, broken deployments, unstable features, confusing logs, or a codebase that is becoming harder to maintain.
Instead of giving you vague advice, I focus on practical fixes that improve stability, performance, debugging, deployment confidence, and user experience.
Common issues I can help with include slow pages or APIs, broken user flows, frontend and backend bugs, build or deployment problems, environment configuration issues, weak logging, unclear production failures, caching problems, developer-level auth or session issues, CI/CD cleanup, and risky code patterns that cause recurring bugs.
You will receive code changes, pull requests or patches, technical notes, and a clear summary of what was fixed, what improved, and what should be addressed next.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$950
|
Standard
$2,400
|
Advanced
$4,800
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 15 days |
Number of Revisions | 1 | 1 | 2 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments | - | - | - |
Optional add-ons
You can add these on the next page.
Extra issue group
(+ 3 Days)
+$600
Logging and error tracking setup
(+ 3 Days)
+$700
CI/CD cleanup
(+ 3 Days)
+$800Frequently asked questions
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GF
Goodrich F.
Mar 31, 2026
GTM Expert Needed for AI SaaS Launch and Growth Strategy
Rafal was a great advisor and a valuable part of moving this project forward. He brought strong technical insight, asked the right questions, and helped bring clarity to areas that were previously ambiguous.
What I appreciated most was his ability to balance big-picture thinking with practical execution. He didn’t just suggest ideas, he helped translate them into actionable steps that made real progress.
Communication was consistent, thoughtful, and professional throughout. Rafal was easy to work with and clearly invested in helping the project succeed.
I’d absolutely recommend him to anyone looking for a sharp, reliable technical advisor.
What I appreciated most was his ability to balance big-picture thinking with practical execution. He didn’t just suggest ideas, he helped translate them into actionable steps that made real progress.
Communication was consistent, thoughtful, and professional throughout. Rafal was easy to work with and clearly invested in helping the project succeed.
I’d absolutely recommend him to anyone looking for a sharp, reliable technical advisor.
PA
Piotr A.
Dec 22, 2023
Experienced JavaScript Front-end developed.
Thank you for the professional top-notch cooperation, efficient communication and reasonable deadline. It has been a pleasure and hope to cooperate again soon!
SA
Søren A.
Jun 17, 2021
Front-end developer for our grocery shopping webapp
Rafal delivered good work on this React Native development project and I enjoyed working with him. His communication was good and he speaks English very well. He has sometimes been busy with other work, but apart from that it has been a good cooperation all along.
JV
Jai V.
Jun 3, 2021
Need an HTML/CSS expert for a UX intensive project
NK
Niklas K.
Mar 19, 2021
Tableau expert to create marketing dashboards, templates and promote them
About Rafal
Senior Full-Stack SaaS Engineer | AI MVPs, Rescue & Scale | Tech Lead
100%
Job Success
Warsaw, Poland - 7:41 pm local time
Recent work includes:
• Growing to 20k MRR from five SaaS products
• Reducing cloud costs by 90%
• Improving e-commerce conversion rate by 158%
• Contributing to commerce storefront workflows on a platform serving 5M+ monthly users
• Improving P0 recovery time to approximately 30 minutes
• Scaling video rendering on cloud to 200 jobs per day, with peaks around 500
I’m a strong fit when:
• You have an AI SaaS idea or partially built product that needs a clear path to launch
• Your React, Next.js, or Node application is unreliable, expensive, or difficult to deploy
• Your team needs a senior engineer to own a critical product workflow or launch deadline
• You need a technical audit or modernization plan before committing to a larger build
What I can own:
• Product and technical scope
• Frontend and backend implementation
• OpenAI and Anthropic API integrations
• Authentication, subscriptions, Stripe, and third-party integrations
• Queues, rendering, retries, logging, and observability
• Deployment, production checks, documentation, and handoff
My approach:
1. Clarify the business outcome, users, deadline, and constraints
2. Define the smallest valuable scope and measurable acceptance criteria
3. Build, test, deploy, and document the agreed workflow
4. Surface risks and tradeoffs early
Core stack: Next.js, React, TypeScript, Node.js, GraphQL, Python, Remotion, FFmpeg, OpenCV, Stripe, GCP, Azure, Docker, and Kubernetes.
Message me with what you’re building, its current stage or stack, and your target launch date. I’ll reply with the likely next step and tell you directly whether I’m the right fit.
Steps for completing your project
After purchasing the project, send requirements so Rafal can start the project.
Delivery time starts when Rafal receives requirements from you.
Rafal works on your project following the steps below.
Revisions may occur after the delivery date.
Problem intake
You share the app context, current stack, access details, and the most painful bugs or production problems.
Investigation and root-cause analysis
I review code, logs, deployment setup, user flows, API behavior, or performance bottlenecks to find the real cause.