Recommended expert
Sergej Melihov
Full Stack Developer
Experience
Jun 2021 - Feb 2023
1 year 9 monthsHanover, Germany
Full Stack Developer
NERDZZ Digitalagentur GmbH
- Built full-stack applications using the MERN stack for urban planning and real estate projects.
- Developed custom dashboards with React and chart libraries (Recharts, D3.js).
- Created RESTful APIs with Express and Node.js, and stored data in MongoDB.
- Led the team’s adoption of Agile, improving sprint delivery and collaboration.
Nov 2020 - Jun 2025
4 years 8 monthsUnited States
Full Stack Developer
Kilwar LLC
- Developed and maintained interactive React applications for geospatial data visualization.
- Built reusable UI components with React, integrated REST APIs with Axios and Redux.
- Improved performance of data-heavy components, reducing load times by 30%.
- Implemented end-to-end testing using Cypress.
- Worked closely with backend and DevOps teams to deploy microservices and enhance system scalability.
Aug 2015 - Mar 2020
4 years 8 monthsFull Stack Developer
The MASCC
- Built and maintained e-commerce platforms using React, Vue, and Node.js.
- Integrated 3rd-party APIs (Stripe, Google Maps, SendGrid) and built internal APIs.
- Designed MySQL and MongoDB schemas for scalable storage.
- Enhanced frontend SEO and accessibility performance.
- Worked on the admin dashboard for real-time order and user management.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (9 years), Retail (4.5 years), and Real Estate (1.5 years).
Information Technology
Retail
Real Estate
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (9 years), Product Development (9 years), Quality Assurance (4.5 years), and Project Management (1.5 years).
Information Technology
Product Development
Quality Assurance
Project Management
Summary
Senior MERN Stack Developer with 8+ years of experience in full-stack web development, with a strong focus on JavaScript-based technologies including MongoDB, Express.js, React.js, and Node.js. Skilled in designing and building responsive, scalable applications and complex REST APIs. Excellent communication and teamwork skills, experienced in agile environments and passionate about delivering high-quality software solutions.
Skills
- Frontend: React.js, Redux, Next.js, Vue.js, Html5, Css3, Tailwind Css, Bootstrap, Material Ui
- Backend: Node.js, Express.js, Restful Apis, Socket.io, Jwt Auth
- Database: Mongodb, Mongoose, Mysql, Postgresql
- Devops & Tools: Git, Github, Docker, Jenkins, Nginx, Pm2, Vercel, Netlify
- Testing & Debugging: Jest, Mocha, Cypress, Postman
- Other: Agile, Scrum, Jira, Figma, Rest Api, Websocket, Typescript
Languages
Greek
IntermediateEnglish
IntermediateGerman
ElementaryEducation
Apr 2011 - Aug 2015
University of Peloponnese
Bachelor of Software Engineering · Computer Science · Tripoli, Greece
Certifications & licenses
Triplebyte Engineering Certificate
Triplebyte
Profile
Created
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Frequently asked questions
Do you have questions? Here you can find further information.
Where is Sergej based?
Sergej is based in Florina, Greece and prefers 100% remote projects.
What languages does Sergej speak?
Sergej speaks the following languages: Greek (Intermediate), English (Intermediate), German (Elementary).
How many years of experience does Sergej have?
Sergej has at least 9 years of experience. During this time, Sergej has worked in at least 1 role and for 3 different companies. The average length of individual experience is 3 years and 1 month. Note that Sergej may not have shared all experience and actually has more experience.
What roles would Sergej be best suited for?
Based on recent experience, Sergej would be well-suited for roles such as: Full Stack Developer.
What is Sergej's latest experience?
Sergej's most recent position is Full Stack Developer at NERDZZ Digitalagentur GmbH.
What companies has Sergej worked for in recent years?
In recent years, Sergej has worked for NERDZZ Digitalagentur GmbH and Kilwar LLC.
Which industries is Sergej most experienced in?
Sergej is most experienced in industries like Information Technology (IT), Retail, and Real Estate.
Which business areas is Sergej most experienced in?
Sergej is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA). Sergej also has some experience in Project Management.
Which industries has Sergej worked in recently?
Sergej has recently worked in industries like Information Technology (IT) and Real Estate.
Which business areas has Sergej worked in recently?
Sergej has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).
What is Sergej's education?
Sergej holds a Bachelor in Computer Science from University of Peloponnese.
Does Sergej have any certificates?
Sergej has 1 certificate: Triplebyte Engineering Certificate.
What is the availability of Sergej?
Sergej is immediately available for suitable projects.
What is the rate of Sergej?
Sergej's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.
How to hire Sergej?
To hire Sergej, click the Meet button on the profile to request a meeting and discuss your project needs.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
800
600
400
200
Market avg: 550-710 €
Market avg: 550-710 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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