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You will get a back-end developer to fix bugs and optimize backend performance

Pavlo V.Status: Offline
Pavlo V. Pavlo V.
4.9
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Pavlo, priced and ready to go.
Pavlo V.Status: Offline
Pavlo V. Pavlo V.
4.9
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Pavlo, priced and ready to go.

Project details

Is your backend experiencing slow response times or encountering errors? I specialize in identifying and fixing issues in your backend systems to improve performance, scalability, and reliability.

I will help you identify, diagnose, and resolve bugs affecting your server, database, or APIs, making your system faster, more efficient, and secure.

Services I Offer:
✔️ Bug Fixes
✔️ Backend Optimization
✔️ Performance Monitoring
✔️ Security Improvements

Technologies I work with:
👉🏻 JavaScript
👉🏻 TypeScript
👉🏻 Node.js
👉🏻 Express.js
👉🏻 Nest.js
👉🏻 Sequelize TypeORM
👉🏻 PostgreSQL MongoDB Firebase
👉🏻 GraphQL
👉🏻 Mocha Jest
👉🏻 AWS S3 Cloudwatch IAM
👉🏻 Websockets
👉🏻 JWT
👉🏻 Auth0
👉🏻 Docker
👉🏻 CI/CD
👉🏻 RabbitMQ
👉🏻 GitHub GitLab Bitbucket
👉🏻 Jira Trello ClickUp Linear

📩 Please, do message me before purchasing this project.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Performance Optimization
What's included
Service Tiers Starter
$750
Standard
$2,500
Advanced
$7,500
Delivery Time 3 days 10 days 30 days
Number of Revisions
123
Bug Investigation
Fix Documentation
Detailed Code Comments
Optional add-ons You can add these on the next page.
Additional Revision
+$100
4.9
12 reviews
92% Complete
(11)
8% Complete
(1)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

JN

Julia N.
5.00
May 29, 2025
Support for Weaver and REterniti Pavlo has been great to work with. He is very willing to get involved in a project even half way through. Pavlo is always willing to listen and quick to respond. He is very easy to get along with and has done some good work for us.

JN

Julia N.
4.15
Dec 5, 2024
Backend work for Weaver & Reterniti

DF

David F.
5.00
Oct 29, 2024
Full-Stack Software Developer - Digital Marketing Reporting SaaS (1-2 Month Contract)

TM

Thomas M.
5.00
Oct 18, 2024
Backend development of NestJS app

AZ

Anatolii Z.
5.00
Oct 1, 2024
Senior Back-End dev Nest.js GraphQL TypeScript Strapi MongoDB Pavel is a talented, responsible server side developer. His skills in working with the admin panel (Strapi) helped me a lot. Pavel also performed database related tasks for me on our project (MongoDB).
I am very satisfied with the work of this freelancer, always quality daily reports, daily code delivery, participation in team calls and clean code. Very good developer! Thank you!
Pavlo V.Status: Offline

About Pavlo

Pavlo V.Status: Offline
Full Stack Developer React Node Next.JS Nest.js Express PostgreSQL AWS
100% Job Success
4.9  (12 reviews)
Nizhyn, Ukraine - 10:38 pm local time
Hello and welcome! 👋

I’m a Senior Backend Engineer with over 5 years of experience architecting and developing high-performance, secure, and scalable backend systems. My expertise lies in building modern server-side solutions that power real-world applications - from small startups to enterprise-grade SaaS platforms.

🧠 Tech Stack & Tools
👉 Languages & Frameworks:
JavaScript | TypeScript | Node.js | Express.js | Nest.js
👉 Databases:
PostgreSQL | MongoDB | Firebase
👉 ORMs:
Sequelize | TypeORM
👉 APIs & Communication:
REST | GraphQL | WebSockets | RabbitMQ
👉 Cloud & DevOps:
AWS (S3, EC2, CloudWatch, IAM) | Docker | CI/CD
👉 Auth & Security:
JWT | Auth0
👉 Testing Frameworks:
Mocha | Jest
👉 Version Control:
GitHub | GitLab | Bitbucket
👉 Task Management:
Jira | Trello | ClickUp | Linear

Also, I am a part of Incode Group - a global JavaScript and TypeScript development company with over 8 years of experience. So, beyond my backend expertise, I can bring in highly skilled frontend specialists from Incode Group to deliver complete solutions tailored to your project.

🧠 Our frontend expertise:

👉 Languages & Frameworks:
JavaScript, TypeScript, ECMAScript 6, React.js, Next.js, React Query, React Storybook, Redux.js, Redux Toolkit, Redux Thunk
👉 UI & Styling:
Material UI, TailwindCSS, ShadCN UI, styled-components, SCSS, Sass, Less, HTML5, CSS3
👉 State Management & Forms:
Redux Toolkit, Zustand, React Hook Form, custom React hooks
👉 API & Data Handling:
Axios, Apollo GraphQL, REST API integration
👉 Data Visualization & Charts:
Charts.js, ApexCharts, Highcharts, Recharts, Echarts
👉 Authentication & Backend Integration: Firebase, Auth0, Supabase

Together, we can:
✔️ Build fully integrated, end-to-end applications with seamless backend/frontend communication
✔️ Ensure pixel-perfect, responsive UIs that match your designs
✔️ Implement efficient, scalable architectures that allow your product to grow without friction
✔️ Optimize development workflows, combining automation, CI/CD, and testing best practices

By working with us, you gain a dedicated, full-stack team capable of handling your project from concept to deployment - delivering quality, speed, and reliability all in one package.

📩 If you’re looking for a backend expert who can deliver robust systems, a frontend developer to create visually appealing user interfaces, or a full-stack team to build your product end-to-end, let’s connect and discuss how we can make your vision a reality - just drop me a message with the project details!

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.

Please, do message me before purchasing this project

Review the work, release payment, and leave feedback to Pavlo.