I build scalable, reliable web platforms and enterprise systems with a focus on clean architecture and long‑term maintainability. My core stack is Laravel, Symfony, and API Platform, and I use them to deliver high‑performance backends, well‑documented APIs, and modern full‑stack solutions.
I’ve delivered complex systems in FinTech, ERP, government, SaaS, and geospatial domains. I care about clear code, Domain‑Driven Design, and systems that can evolve without breaking.
What I’m best at
• Laravel & Symfony: enterprise apps, custom packages, REST APIs
• API Platform: REST/GraphQL, JSON‑LD, OpenAPI/Swagger
• Architecture: DDD, Hexagonal, CQRS, Event‑driven systems, RabbitMQ for async messaging
• Real‑time: WebSockets, Mercure
• Databases: MySQL, ClickHouse, PostgreSQL, PostGIS, FTS, pgRouting, Elasticsearch
• Observability: Kibana (log analysis), Grafana (metrics/dashboards)
• Frontend: Vue, Nuxt, React, Next.js
• Infrastructure: Docker, Linux, NGINX/Apache, Redis
• AI Coding Agent: daily use of GPT/Codex & Claude Code for faster scaffolding, refactoring, test generation, and cleaner code
How I help clients
• Build or modernize Laravel/Symfony applications
• Design secure, versioned APIs for web/mobile clients
• Add real‑time features and messaging
• Optimize performance: queries, indexing, caching, Elasticsearch, async processing with RabbitMQ
• Deliver geospatial systems with PostGIS and OSM
• Stabilize and scale existing codebases
• Set up Kibana + Grafana monitoring for logs, metrics, and system health
• Deliver cleaner, better‑documented code faster by leveraging AI Coding Agents (GPT/Codex, Claude Code) in my daily workflow
If you need a senior engineer who can own the backend architecture, deliver clean code, and communicate clearly, let’s talk.
PHP
Symfony
Laravel
Vue.js
React
Full-Stack Development
Docker
PostgreSQL
MySQL
JavaScript
API Development
ClickHouse
REST API
OpenAPI
PHPUnit
AI Code Generator
Back-End Development
Illya P.
Kharkiv, Ukraine
$35/hr
5.0
27 jobs
👋 Need a high-load Java platform that scales without a glitch? 🚀 I provide full-stack ownership with Spring Boot and React Native, turning complex ideas into secure, production-ready reality. Backed by 20+ years and 100+ delivered projects, I build code that works for your bottom line, not just your repo. Check out my page to see my portfolio! 🛡️
As a Java Developer I've built high-load backend systems, REST AP payment solutions document processing platforms, and business applications used by thousands of users. As a Full Stack Developer and React Native Developer I've helped startups and growing companies launch scalable products while maintaining security, performance, and compliance.
Throughout my career, I've worked with startups, established businesses, and enterprise clients, helping them transform ideas into reliable software products. My experience covers the entire development lifecycle, from architecture planning and technical discovery to development, deployment, optimization, and long-term support.
My expertise includes Java Developer Spring Boot React Native AWS PostgreSQL Docker Kubernetes microservices cloud infrastructure and secure software architecture
💪 Full Stack Java Developer Expertise
✔️ 20+ years of Java development 100 successful projects using Java, Spring Boot, Spring Security, Hibernate, and enterprise architectures
✔️ Full Stack Development covering backend architecture database design frontend implementation and React Native mobile applications
✔️ Spring Boot Development, REST API microservices cloud-native applications and high-performance backend systems
✔️ Backend Architecture, distributed systems, 50 third-party integrations, authentication systems, and secure API development
✔️ PostgreSQL MySQL Redis AWS Docker Kubernetes CI/CD performance optimization and legacy system modernization
✔️ Extensive experience designing business-critical applications where scalability, maintainability, security, and long-term growth are key requirements
✔️ Experience integrating payment gateways, healthcare systems, cloud services, identity providers, and external enterprise platforms
✔️ Strong understanding of software architecture, design patterns, clean code principles, and modern development practices
✔️ Experience leading technical initiatives, collaborating with distributed teams, participating in code reviews, and helping businesses make technology decisions
🏥 Healthcare Software Development Expertise
As a Senior Java Developer and Full Stack Developer, I've built secure and HIPAA-compliant healthcare software for startups, clinics, and digital health companies.
✔️ 100+ healthcare applications including EHR/EMR systems, telemedicine platforms, patient portals, and engagement solutions
✔️ 80+ FHIR & HL7 integrations for healthcare interoperability and secure data exchange
✔️ 150 React Native healthcare apps with Apple HealthKit, Google Fit, BLE, and real-time health monitoring
✔️ 100+ healthcare features delivered, improving patient engagement and clinical workflows
✔️ 50+ HIPAA-compliant architectures with encrypted storage, audit logging, RBAC, and secure APIs
✔️ 100 Java Spring Boot backend systems with up to 99.9% uptime
✔️150+ healthcare workflow automations, provider portals, appointment management, and patient communication platforms
💳 Fintech Software Development Expertise
As a Full Stack Java Developer I've built PCI DSS-compliant fintech platforms focused on payments, identity verification, and transaction security.
✔️ 30+ Stripe, Apple Pay, Google Pay, and 3D Secure (3DS) integrations
✔️ 20+ KYC & AML workflows for onboarding and compliance automation
✔️ 100+ payment features delivered, reducing friction and improving transaction success
✔️ 25+ payment platforms, transaction systems, and financial API integrations
✔️ 15+ PCI DSS architectures with encryption, tokenization, audit logging, and secure authentication
✔️ 50+ financial reporting, payment workflows, transaction monitoring, and compliance solution
🏆 Key Results
✔️ 20+ years of commercial experience as a Full Stack Java Developer
✔️ 100+ enterprise projects across Healthcare, FinTech, SaaS, and AI
✔️ 55+ AI-powered products using OpenAI, Claude API, FastAPI, AI Agents & RAG ( use Lovable \ Bollt.new \ Base44 and etc )
✔️ Up to 100% uptime for mission-critical healthcare and fintech systems
✔️ Up to 40% higher patient engagement through digital health solutions
✔️ Up to 25% lower payment decline rates with optimized payment workflows
✔️ Up to 35% faster application performance and scalability improvements
✔️ Up to 90% fewer security vulnerabilities with secure architectures
📩 Looking for a technical partner who understands both technology and business goals?
I help companies build, scale, and modernize Healthcare Fintech SaaS and Enterprise products using Java Spring Boot Full Stack technologies and React Native
MongoDB
Spring Framework
SQL
Spring Security
Core Java
Back-End Development
Full-Stack Development
React Native
API Integration
Expo.io
TypeScript
Apache Kafka
Web Development
JavaScript
AI Development
Java
Spring Data MongoDB
Spring Boot
AI Mobile App Development
Node.js
Oleh K.
Kharkiv, Ukraine
$50/hr
4.9
82 jobs
Seeking opportunities in Java/Perl/Python oriented development, shell scripting, BSD/Linux administration - to support your business.
Java: Spring, Hibernate
Perl: Catalyst/Mojo/Dancer, DBIx::Class
Python: Django, FastAPI, SQLAlchemy
DB: Postgres, MySQL/MariaDB
On-hand experience with regular expressions (regexp), REST, and AJAX.
I can work well alone and as a team member.
Perl
PHP
Git
MySQL
PostgreSQL
Linux System Administration
FreeBSD
Network Administration
XHTML
DNS
Oracle PLSQL
Artem S.
Kharkiv, Ukraine
$35/hr
5.0
3 jobs
✅ Available for new projects 🚀
I’m a Full-Stack JavaScript Developer specializing in React, Next.js, Node.js (Express.js, NestJS), AWS and scalable backend systems ⚡
5+ years of commercial experience. I’ve worked on long-term production projects (including $30K+ contracts 💰), delivering reliable solutions, clean architecture, and consistent results.
I specialize in building end-to-end applications — from frontend interfaces to backend systems and APIs — with a strong focus on performance, maintainability, and real business needs. I also have solid experience with cloud platforms ☁️ and a strong passion for software engineering.
🚀 Core Expertise
🎨 Frontend Development
• React.js (Hooks, Context, Suspense, memoization, lazy loading, performance optimization)
• Next.js (SSR, SSG, ISR, App Router, edge rendering)
• State management & data fetching: Redux Toolkit, Zustand, MobX, TanStack Query (React Query), caching strategies, server state management
• UI: Material UI, Chakra UI, Ant Design, Bootstrap, Tailwind CSS, Radix UI, ShadCN UI
• Styling: CSS Modules, SASS, LESS, SCSS, Styled Components, Emotion
• Forms & UX: React Hook Form, Formik, Zod validation
• Building responsive, fast, and scalable interfaces
🛠 Backend Development
• Node.js (Express.js, NestJS, modular architecture)
• REST API & scalable backend architecture
• Authentication & authorization (JWT, OAuth, session-based auth)
• Microservices & event-driven architecture
• (MERN) Full-stack patterns (MongoDB, Express.js, React, Node.js / NestJS)
• API design: REST, GraphQL, gRPC
• Realtime systems (WebSockets, Socket IO)
• Message brokers & event streaming: Kafka, RabbitMQ
• Background jobs, queues & async processing
🗄 Databases & ORM & Cache
• PostgreSQL, MySQL, MongoDB, SQLite, MS SQL, DynamoDB
• Prisma, TypeORM, Sequelize, Mongoose, Drizzle, Knex, Kysely, MikroORM
• Database design & optimization
• Redis
🔗 Full-Stack & Integrations
• API integrations (third-party services, SaaS)
• Payment integrations (Stripe, Braintree, Pay com etc.)
• Real-time systems (WebSockets, Socket IO)
• Media & streaming (WebRTC, HLS)
• File uploads, payments, notifications
• Building SaaS platforms, dashboards, and marketplaces
⚙️ Tools & Environment
• JavaScript (ES6+, ESNext) | TypeScript
• Git (GitHub, GitLab, Bitbucket)
• CI/CD basics, GitHub Actions, pipelines
• Cloudflare, Vercel, Google Cloud Platform (GCP), AWS (Lambda, S3, EC2, Amplify etc.), Serverless (SST) | Docker
• Ngrok, Envoy
• Agile workflows (Scrum, Kanban) using Jira / Asana / ClickUp / Trello
💡 What you can expect from me
✔ Clean, readable, and maintainable code
✔ Strong problem-solving skills
✔ Clear and fast communication
✔ Ability to work independently or in a team
✔ Focus on delivering real value, not just completing tasks
📈 Experience Highlight
• Long-term contract ($30K+ earned 💰)
• 5⭐ client feedback
• 800+ hours worked on production system
• Experience working on large-scale Next.js applications
🤝 Let’s work together
Fluent in English 🇬🇧 | Agile mindset | Ready to start immediately
If you’re looking for a developer who can take ownership, suggest better solutions, and deliver stable results — feel free to reach out.
Just drop me a message and let’s chat 💬
🏷 Highlighted skills
Web Development, Application Development, JavaScript (JS), TypeScript, Full-Stack Development, Front-end Development, Back-end Development,
React, Next.js, Node.js, Express.js, NestJS,
Redux, Zustand, MobX,
HTML, CSS, SCSS, Tailwind CSS, Styled Components, Radix UI, ShadCN UI, Material UI, Chakra UI, Ant Design,
REST API, GraphQL, gRPC, API Development, API Integration,
PostgreSQL, MongoDB, MySQL, SQLite, DynamoDB, SQL,
Prisma, TypeORM, Sequelize, Mongoose, Drizzle, Knex, Kysely, MikroORM,
AWS, Serverless, Vercel, Cloudflare, Google Cloud Platform,
Docker, CI/CD, GitHub Actions,
WebSockets, Socket IO, WebRTC, HLS,
Kafka, RabbitMQ, Redis,
SaaS, Microservices, System Design, Software Architecture,
Payments Integration (Stripe, Braintree, Pay com),
Dashboards, Admin Panels, CRM, ERP, CMS
📅 Last updated: April 3, 2026
JavaScript
TypeScript
Node.js
ExpressJS
NestJS
React
Redux
Next.js
Tailwind CSS
PostgreSQL
MongoDB
MySQL
Material UI
CSS
HTML
RabbitMQ
Apache Kafka
Redis
Web Development
Amazon Web Services
Oleksandr B.
Kharkiv, Ukraine
$30/hr
5.0
2 jobs
Are you searching for a highly skilled Full-Stack Developer to handle your large-scale projects or quick tasks? You’re in the right place! 🚀
With 10 years of programming experience and 5 years of expertise in building and improving websites, I specialize in creating solutions tailored to your business needs. My goal is to deliver high-quality work that exceeds your expectations.
🌟 Key Achievements:
Major American Clothing Website: Built a family-friendly e-commerce platform (USA) — 2 years.
Accessories Website: Designed and optimized a visually appealing site (Argentina) — 1 year.
Medical Products Website: Created a robust, secure platform for healthcare (USA) — 1 year.
Gems Website: Developed a polished e-commerce store (UK) — 1 year.
💬 What Clients Say:
📍 "Alexander is very talented, delivers everything on time, and has the analytical mindset I’ve always been looking for."
📍 "Amazing work! I highly recommend Alexander. He is talented, professional, and committed to finishing the project perfectly."
🛠 Tools and Technologies I Use:
Languages/Frameworks: Magento, WordPress, Laravel, React, PHP
Design/Development Tools: Figma, PHPStorm, Procreate, GitHub
Let’s work together to bring your ideas to life! Feel free to reach out to discuss your project needs.
Redis
NGINX
Laravel
MySQL
Apache Axis
Elasticsearch
REST API
PHP
WordPress
React
Magento 2
Magento
JavaScript
SCSS
CSS
Iryna K.
Kharkiv, Ukraine
$50/hr
4.8
42 jobs
Hi, I’m a Java Developer with extensive experience in software development, specializing in backend, and full-stack solutions. I build high-performance, scalable applications using Java, Spring Boot, and modern web technologies. My expertise covers RESTful API design, microservices architecture, and cloud-based solutions with Amazon Web Services (AWS) and Docker.
✔ Core Skills & Technologies:
I leverage a versatile tech stack to build scalable, secure, and high-performance applications, ensuring reliability and efficiency.
🟢 Programming Languages: Java, JavaScript, TypeScript, Python, PHP – Used to develop 20+ enterprise applications, handling thousands of daily users.
🟢 Frameworks & Libraries: Java Spring Boot, Spring Framework, Hibernate, React, Angular, jQuery – Optimized system performance, improving response times by 25%.
🟢 Database Management: MySQL, SQL, MongoDB – Designed and maintained databases processing over 1M+ transactions monthly.
🟢 Web & Application Development: Web Development, Java Development, Desktop Applications, Standalone Applications, WordPress – Delivered 50+ projects, enhancing client operations and user engagement.
🟢 DevOps & Deployment: Docker, Apache Tomcat, Git – Streamlined CI/CD pipelines, reducing deployment time by 30%.
🟢 Software Engineering: Software Architecture & Design, Software Development, Software Debugging – As a Java Developer I developed scalable solutions supporting 50K+ active users.
🟢 UI/UX: HTML CSS JavaScript, HTML5, CSS3 – Created responsive interfaces that increased user engagement by 20%.
🟢 Testing & Quality Assurance: JUnit, Software Testing – Reduced production issues by 40% through automated and manual testing.
✔ What I Build as a Java Developer
My expertise spans across developing:
🟢 Backend Systems: Scalable microservices architectures, high-performance enterprise applications, developed by a Java Developer
🟢 Web Development: Secure full-stack solutions with Spring Boot, JavaScript, HTML, CSS
🟢 API Development & Integrations: RESTful API, GraphQL, third-party API integrations
🟢 SaaS Platforms: Cloud-powered software development with AWS, Docker, and Kubernetes
🟢 Custom CRM & ERP Solutions: Optimized for business process automation
🟢 DevOps & Infrastructure: CI/CD pipelines, cloud deployment, serverless solutions
✔ Industries I Work With
My solutions empower businesses in diverse industries:
🟢 EdTech & E-Learning: LMS platforms, interactive e-learning solutions
🟢 HealthTech & Medical: Secure healthcare applications, compliance-driven systems
🟢 E-commerce & Retail: Payment integrations, inventory management solutions
🟢 FinTech & Banking: Secure financial applications, transaction processing
🟢 SaaS & Enterprise Software: B2B platforms, cloud-based solutions
🟢 HRTech & Recruitment: Custom HR systems, workforce analytics
🟢 Manufacturing & Logistics: ERP integrations, supply chain management
🟢 Travel & Booking: Reservation systems, customer portals
✔ Development Approach & Work Style
🟢 Problem-Solving Mindset: Writing clean, maintainable, and well-documented code for scalability
🟢 Client-Centric Approach: Aligning technology solutions with business goals
🟢 Agile Software Development: Iterative development, CI/CD pipelines, continuous integration
🟢 Performance & Security Focused: Optimized queries, security best practices
✔ Leadership & Client Impact:
🟢 Led teams of 5+ Java developers to implement scalable Java solutions for clients worldwide( from India to the US).
🟢 As a Java Developer, I developed Java-based platforms contributing to a significant increase in client revenue.
🟢 Consistently received 4.9/5 ratings, reflecting dedication to quality and client success.
If you're looking for an experienced Java Developer, Senior Java Developer, Full Stack Developer, Java Spring developer, Javascript Developer, Python Developer, Java developer India to build scalable, high-performance applications, let’s connect!🚀
Java
Spring Boot
Spring Framework
MySQL
JavaScript
SQL
Hibernate
Apache Tomcat
Web Development
Git
CSS
React
HTML
Python
TypeScript
How it works
Post a job for freePost a job
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
KD
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
DM
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
KK
Katja Krohn
Summa Linguae
How do I hire a Apache Developer near Kharkiv, on Upwork?
You can hire a Apache Developer near Kharkiv, on Upwork in four simple steps:
Create a job post tailored to your Apache Developer project scope. We’ll walk you through the process step by step.
Browse top Apache Developer talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top Apache Developer profiles and interview.
Hire the right Apache Developer for your project from Upwork, the world’s largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a Apache Developer?
Rates charged by Apache Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a Apache Developer near Kharkiv, on Upwork?
As the world’s work marketplace, we connect highly-skilled freelance Apache Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Apache Developer team you need to succeed.
Can I hire a Apache Developer near Kharkiv, within 24 hours on Upwork?
Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive Apache Developer proposals within 24 hours of posting a job description.