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You will get full stack developer | full stack web developer | Python developer

Rostyslav Z.Status: Offline
Rostyslav Z. Rostyslav Z.
4.5
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Rostyslav, priced and ready to go.
Rostyslav Z.Status: Offline
Rostyslav Z. Rostyslav Z.
4.5
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Rostyslav, priced and ready to go.

Project details

I build and run backend systems as a full stack developer as part of Full-Stack Development work focused on reliability, scale, and performance.

I worked as a full stack developer in startup environments, Big Tech companies, and large-scale enterprise teams, collaborating in international English-speaking settings. I followed structured workflows using Jira, Kanban boards, sprint planning, and code review processes, working in distributed teams where delivery, clarity, and stability were critical.

My experience in Full-Stack Development as a full stack developer includes building production systems using JavaScript, React, Node.js, HTML5, PHP, CSS, Tailwind CSS, and API Integration.

I’ve delivered Full-Stack Development solutions as a full stack developer where JavaScript and React were used to build interactive interfaces, while Node.js and API Integration handled backend logic. In other projects, Full-Stack Development required working with PHP, Laravel, and MySQL for data-heavy systems.
Programming Languages
HTML & CSS, JavaScript, Python
Coding Expertise
Cross Browser & Device Compatibility

What's included $50

These options are included with the project scope.

$50
  • Delivery Time 70 days
  • Number of Revisions 0
4.5
4 reviews
75% Complete
(3)
1% Complete
(0)
25% Complete
(1)
1% Complete
(0)
1% Complete
(0)

HG

Hristo G.
3.00
Mar 20, 2026
Backend Developer (Part-time, Freelance) While we had a positive initial impression from the interview, the technical execution, following timelines, and communication did not meet the level we expected.

TH

Thomas H.
5.00
Feb 4, 2024
Backend Developer for Website

TH

Thomas H.
5.00
Feb 4, 2024
React + Firebase Backend Developer

TH

Thomas H.
5.00
Feb 7, 2020
Display JSON API Data in Google Sheets, updated daily
Rostyslav Z.Status: Offline

About Rostyslav

Rostyslav Z.Status: Offline
Full Stack Developer | Python Developer | Node.js Developer
100% Job Success
4.5  (4 reviews)
Kyiv, Ukraine - 4:14 pm local time
Hello 👋 🔥 𝗜’𝗠 𝗧𝗢𝗣 𝟭𝟬% 𝗣𝘆𝘁𝗵𝗼𝗻 & 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | Python Developer | 10+ Years Building Scalable Products 💻⚡ From startup MVPs to enterprise platforms, I help companies build, scale, optimize, and launch reliable web applications fast.

I work as a Full Stack Developer and Python Developer across both frontend and backend systems, designing products from scratch, improving legacy platforms, integrating APIs, and scaling architecture for long-term growth. In backend-heavy systems, I act primarily as a Python Developer and Node.js Developer, while on client-facing interfaces I operate as a React Developer and JavaScript Developer.

As a Full Stack Developer and Python Developer, I worked in startup environments, Big Tech companies, and enterprise teams, collaborating in international English-speaking settings. I followed structured workflows using Jira, Kanban boards, sprint planning, and code review processes where a Node.js Developer and Python Developer often share backend responsibilities depending on service boundaries.

I have 10+ years of experience as a Python Developer, working deeply with Python for backend systems, automation, and data pipelines. In parallel, I have 7+ years of experience as a Node.js Developer building scalable APIs and real-time services. On the frontend side, I have 5+ years of experience as a React Developer and JavaScript Developer building modern UI systems.

During my career as a Full Stack Developer and Python Developer, I’ve implemented 200+ REST APIs and integrations across payment systems, messaging APIs, and AI services. Many of these were split between Node.js Developer services for real-time workloads and Python Developer services for data processing and ML pipelines.

Primary stack: Python (FastAPI, Django, DRF), Node.js (Express, NestJS), TypeScript, JavaScript Developer, React Developer, Next.js, PostgreSQL, MongoDB, Redis, Supabase. In practice, this means I switch between Python Developer roles for backend intelligence layers and Node.js Developer roles for event-driven systems and APIs, while React Developer and JavaScript Developer responsibilities cover frontend architecture and UI delivery.

Over the last 10+ years as a Full Stack Developer and Python Developer, I’ve built SaaS products, automation systems, AI platforms, and analytics engines. These systems typically combine Python Developer services for processing and Node.js Developer services for orchestration, with React Developer dashboards and JavaScript Developer frontends.

My main focus today as a Python Developer and Full Stack Developer is AI engineering, backend architecture, and scalable systems. I design RAG pipelines, LLM integrations, and automation workflows where Python Developer components handle computation-heavy logic and Node.js Developer services manage API orchestration.

I have experience as a Python Developer running asynchronous workers processing 10K+ background jobs daily, and as a Node.js Developer building event-driven microservices for high-throughput systems. On the frontend, as a React Developer and JavaScript Developer, I build dashboards, admin panels, and product interfaces.

As a Full Stack Developer and Python Developer, I take ownership of both backend and frontend architecture, including APIs, databases, authentication systems, and performance-critical applications. In most systems I’ve delivered, the backend is split between Python Developer services and Node.js Developer services, while the frontend is handled with React Developer and JavaScript Developer stacks.

One thing that separates me is that I understand both production engineering and AI-generated code risks. As a Python Developer and Node.js Developer, I regularly review and refactor AI-generated backend logic to ensure stability, while as a React Developer and JavaScript Developer I ensure UI logic stays maintainable and scalable.

I don’t just generate code quickly. As a Full Stack Developer, Python Developer, Node.js Developer, React Developer, and JavaScript Developer, I build systems that remain stable under scale and long-term maintenance pressure.

As a Senior Full Stack Developer and Python Developer, I care about clean architecture, fast delivery, and systems that don’t collapse under growth.

Steps for completing your project

After purchasing the project, send requirements so Rostyslav can start the project.

Delivery time starts when Rostyslav receives requirements from you.

Rostyslav works on your project following the steps below.

Revisions may occur after the delivery date.

Full Stack developer

Full Stack developer

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