Nikolay S.
FreelancerTop Rated PlusSenior Software Engineer | E-commerce | CRM
Member since 2025 · 100% Job Success
View on Upwork
WorldTop 0.41%
BulgariaTop 0.49%
Web DevelopmentTop 1%
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$5.5k
MRR
est. monthly
#4,292
World rank
of 1,057,162
$44k
Lifetime earnings
since 2025
3
Total jobs
completed
About
E-commerce | AI-Driven Platforms | Web3 | SaaS Architect | Shopify | WordPress | CMS
I’m a Principal Engineer who has led and delivered projects across the full spectrum from early business requirement gathering and architecture design to frontend/back-end development, deployment, and long-term maintenance.
Over the past 10+ years, I’ve built complex E-commerce systems, AI-powered platforms, and Web3 applications, always owning the full SDLC (Software Development Life Cycle). My focus is turning business ideas into scalable, maintainable, and high-performing digital products that directly drive growth and customer success.
⚙️ Core Technical Expertise
Frontend / Web
- React.js, Next.js (SSR/SSG/ISR), Redux, Zustand, Recoil
- TypeScript, JavaScript (ES6+), TailwindCSS, SCSS, Material UI, Ant Design
- Vue.js, Nuxt.js, SvelteKit, Astro
- Pixel-perfect UI implementation from Figma or Adobe XD
- Progressive Web Apps (PWA), Responsive design, Accessibility (WCAG)
Mobile - React Native, Expo, Flutter, Swift (iOS), Kotlin (Android)
- Shared UI libraries, API integration, Firebase push notifications
Backend - Node.js (Express, NestJS, Fastify), Python (FastAPI, Flask, Django), PHP (Laravel, WordPress, WooCommerce)
- Golang, Rust (for performance-critical services)
- REST & GraphQL APIs, WebSockets, gRPC, Apollo Server
- Authentication systems (JWT, OAuth2, Supabase Auth, Firebase Auth, Clerk, Auth0)
Databases & Storage - PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, Elasticsearch, Firestore
- Prisma, TypeORM, Sequelize, Mongoose
- Data warehousing: BigQuery, Snowflake, ClickHouse
- File storage: S3, Cloudinary, Supabase Storage
DevOps / Cloud / CI-CD - AWS (EC2, Lambda, ECS, S3, RDS, CloudFront)
- GCP (Cloud Run, Firestore, Cloud Scheduler), Vercel, Netlify
- Docker, Kubernetes, ArgoCD, GitHub Actions, Jenkins, CircleCI
- Nginx, PM2, Terraform, Pulumi
- Monitoring: Grafana, Prometheus, Datadog
Architecture & Systems - Monolithic & Microservice Architectures
- Event-driven systems (Kafka, RabbitMQ, SQS, Pub/Sub)
- Serverless functions (AWS Lambda, Cloud Functions)
- Scalable caching (Redis, CDN-level, local memory)
Rankings
Where Nikolay S. ranks by monthly revenue, worldwide, in Bulgaria, and in every Upwork skill it competes in.
World#4,292 / 1,057,162Top 0.41%
Bulgaria#13 / 2,662Top 0.49%Web Development#386 / 28,548Top 1%
Back-End Development#77 / 5,634Top 1%
Front-End Development#145 / 9,029Top 2%
PHP#308 / 19,363Top 2%
JavaScript#704 / 40,764Top 2%
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Freelancer snapshot
On Upwork since2025
Rating100% Job Success
Skills tracked5
Skills
Web DevelopmentBack-End DevelopmentFront-End DevelopmentPHP
Nikolay S. works mainly in Web Development, ranking top 1% of freelancers in that skill.
MRR trendSoon
Last 12 weeks
Coming soon
Competitors on the board
Who ranks just above and below by MRR across all freelancers.
This freelancer is #4,292 of 1,057,162 across all freelancers.
RankFreelancerMRRMRR trend
MRR benchmark
Nikolay S. earns more than 99.59% of all freelancers we track.
Top 0.41%
among all freelancers we track
$0–$500
33%
$500–$1k
12%
$1k–$2.5k
17%
$2.5k–$5k
13%
$5k–$10k
12%
$10k–$25k
10%
$25k–$50k
3%
$50k+
1%
Nikolay S.'s bracket · $5.5k
You33%$0–$500
You12%$500–$1k
You17%$1k–$2.5k
You13%$2.5k–$5k
You12%$5k–$10k
You10%$10k–$25k
You3%$25k–$50k
You1%$50k+
Nikolay S. earns an estimated $5.5k/mo. That's 3.7× the typical freelancer and more than 99.59% of everyone we track.
Freelancers with no recent MRR are excluded. Only the 151,601 freelancers with active monthly revenue are ranked here.
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MRR is an estimate from Upwork's public figures - not an Upwork-official number.