Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get Spring Boot Developer | Java Developer | Java Spring Boot | Spring Boot

Illya P.Status: Offline
Illya P. Illya P.
5.0
Rising Talent
Preview image

Let a pro handle the details

Buy Other Web Programming services from Illya, priced and ready to go.
Illya P.Status: Offline
Illya P. Illya P.
5.0
Rising Talent
Preview image

Let a pro handle the details

Buy Other Web Programming services from Illya, priced and ready to go.

Project details

CONTACT ME BEFORE ORDERING

Need a skilled Java Spring Boot developer?

My team and I develop scalable web applications, REST APIs, backend systems, and full-stack solutions using Java, Spring Boot, and React.

 • Java Development
 • Spring Boot Applications
 • REST API Development
React Frontend Development
 • Full Stack Solutions
 • Database & Cloud Integration

Send me your requirements, and I'll provide a consultation and project estimate.

Java Developer Spring Boot Developer Java Spring Boot React Developer Full Stack Developer Backend Developer REST API Java Engineer Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java Spring Boot React Spring Boot Developer Java
Web Programming Project
Blockchain Development, Browser Extension, API Development, API Integration, Data Dashboard
Programming Languages
JavaScript, Java, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Security

What's included $12,000

These options are included with the project scope.

$12,000
  • Delivery Time 9 days
  • Number of Revisions 5
5.0
7 reviews
100% Complete
(7)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

SJ

Seth J.
5.00
Apr 24, 2020
Senior full-stack Java and AngularJS developer With no exaggeration I can say that Illya is flat-out amazing. Excellent developer, an expert in his field. But also a great communicator, and super bright problem-solver. Always understanding the exact problem and getting it solved better and faster than anyone had even hoped for. This is how doing software development should be!

an

alex n.
5.00
May 1, 2019
Java architect, java spring, api expert needed for complex aggregator project It has been a pleasure working with Ilya, as a project manager. Unfortunately for unrelated reasons had to close the contract.

SZ

Stan Z.
5.00
Jan 30, 2019
Vaadin and Hibernate Senior Developer Great work.

MG

Michelle G.
5.00
Sep 19, 2016
Java Developer. Illya worked Server Side for us for nearly a year.

BB

Bas B.
5.00
Sep 15, 2016
Spring MVC for Cloud-based productivity tool Continuing to work with this team. As usual, highly experienced, committed and .... most importantly ethical guys to work with. I highly recommend them.
Illya P.Status: Offline

About Illya

Illya P.Status: Offline
Java Developer Spring Boot | Full Stack Java Developer | React Native
5.0  (7 reviews)
Kharkiv, Ukraine - 4:06 pm local time
👋 I'm a Senior Full Stack Java Developer with 20+ years of experience building enterprise software, healthcare platforms, fintech solutions, SaaS products, and mobile applications.

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

✔️ EHR / EMR systems, telemedicine platforms, patient portals, and patient engagement applications
✔️ FHIR & HL7 integrations for healthcare interoperability and secure data exchange
✔️ React Native healthcare applications with Apple HealthKit Google Fit BLE integrations and real-time health monitoring
✔️ Improved patient engagement by up to 100%
✔️ HIPAA compliant architectures with encrypted storage, audit logging, role-based access control, and secure API
✔️ Java Spring Boot backend systems with up to 99.9% uptime
✔️ Healthcare workflow automation, provider portals, appointment management systems, 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.

✔️ Stripe Apple Pay Google Pay and 3D Secure ( 3DS ) integrations
✔️ KYC & AML workflows for onboarding and compliance automation.
✔️ Reduced payment default rates in more than 100+ projects
✔️ Payment processing platforms, transaction management systems, and financial API
✔️ Secure fintech architectures with encrypted storage, tokenization, audit logging, and secure authentication.
✔️ Financial reporting systems, payment workflows, transaction monitoring, and compliance-focused software solutions.

🏆 Key Results

✔️ 15+ years of commercial software development experience. (role Full Stack Java Developer )
✔️ Built enterprise healthcare fintech and SaaS applications for startups and growing businesses
✔️ Achieved up to 100% uptime for mission-critical systems.
✔️ Improved patient engagement by up to 40%
✔️ Reduced payment decline rates by up to 25%
✔️ Improved application performance by up to 35%
✔️ Reduced infrastructure costs by up to 25%
✔️ Reduced security vulnerabilities by up to 90%
✔️ Modernized legacy applications through microservices adoption and cloud migration initiatives

📌 Core Technologies

Java Developer • Spring Boot • Spring Security • Hibernate • React Native • TypeScript • PostgreSQL • MySQL • Redis • Kafka • AWS • Docker • Kubernetes • REST API • Microservices • FHIR • HL7 • HIPAA • PCI DSS • Stripe • KYC • AML

📩 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

If you're looking for more than just code, let's discuss your project and how I can help.

Steps for completing your project

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

Delivery time starts when Illya receives requirements from you.

Illya works on your project following the steps below.

Revisions may occur after the delivery date.

Understanding the concept and step-by-step planning for implementation

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