You will get Java Developer and Optimized Spring Boot Java App & Database Performance
Project details
❗️Before buying please write me to discuss details❗️
I will analyze and optimize your Spring Boot application and database performance. This includes profiling the app, tuning Spring Data JPA, optimizing PostgreSQL/MySQL queries, and reviewing architecture for bottlenecks. If needed, I’ll handle database migrations using Liquibase or Flyway, ensuring safe transitions across environments.
Deliverables:
Full performance audit of Spring Boot backend
Spring Data query optimization (N+1 fixes, pagination, projections)
Index tuning and slow query resolution
Hibernate/JPA best practices applied
Database migration scripts (Liquibase/Flyway)
Optional caching strategies (Redis/TTL)
Great For:
Clients with slow applications, large datasets, growing traffic, or legacy databases in need of modernization.
I will analyze and optimize your Spring Boot application and database performance. This includes profiling the app, tuning Spring Data JPA, optimizing PostgreSQL/MySQL queries, and reviewing architecture for bottlenecks. If needed, I’ll handle database migrations using Liquibase or Flyway, ensuring safe transitions across environments.
Deliverables:
Full performance audit of Spring Boot backend
Spring Data query optimization (N+1 fixes, pagination, projections)
Index tuning and slow query resolution
Hibernate/JPA best practices applied
Database migration scripts (Liquibase/Flyway)
Optional caching strategies (Redis/TTL)
Great For:
Clients with slow applications, large datasets, growing traffic, or legacy databases in need of modernization.
Programming Languages
Java, KotlinWhat's included $10,000
These options are included with the project scope.
$10,000
- Delivery Time 50 days
- Number of Revisions 0
- Source Code
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Aung L.
Jul 26, 2025
Java Developer spring boot needed to Diagnose and Speed Up our saas platform
Serhii is excellent java developer, found and fixed our problems! Very professional, always reply fast and explain technical things clearly.
About Serhii
Java Developer | Java Spring Boot | Backend Senior Developer | 10+ yoe
Singapore, Singapore - 6:30 pm local time
⚡ Ready to start immediately - 🚀 let's accelerate your success together.
I’m Serhii, a back-end expert with 10+ years of experience building high-performance systems using Java, Spring Framework, and RESTful APIs.
My goal is to help clients transform their ideas into efficient, secure, and production-ready applications. 🚀
🔧 My Technical Toolbox Includes
✅ Java & Kotlin
✅ Spring Boot, Spring Security, Spring Data JPA
✅ REST API & Microservice architecture
✅ Hibernate, PostgreSQL, MySQL
✅ Apache Kafka, RabbitMQ
✅ Docker, Kubernetes, CI/CD (GitHub Actions, Jenkins, GitLab CI)
✅ Cloud: AWS, GCP
💡 Why Clients Choose Me
As a Java Developer specializing in Spring Boot and back-end systems, I’ve delivered enterprise-grade applications across FinTech, MedTech, and E-commerce.
✔️ Refactored large monoliths into testable Java microservices – improving delivery speed by 30–50%
✔️ Led cloud migrations and backend optimization for apps with 25k+ daily active users
✔️ Built Kafka-based real-time streaming systems processing millions of events per day
✔️ Mentored engineers across 4 countries, raising team velocity and code quality
🚀 Project Highlights
🔹 Cloud-native Microservices for asset management platforms
🔹 ERP Migration from PHP monolith to scalable Spring Boot services
🔹 Compliance-focused Banking Tools using Kafka and Java
🔹 High-performance APIs with real-time financial data analytics
Each project reflects my passion for clean architecture, domain-driven design, and Spring Framework best practices.
📈 Let’s Work Together
Whether you're building a new Java API, modernizing your legacy stack, or scaling your Spring Boot microservices - I'm here to help.
🔸 Strong communicator
🔸 Agile mindset
🔸 Focused on long-term partnership and delivery excellence
Let’s discuss your needs and explore how I can contribute to your success as your next Java Developer or Spring Boot engineer.
🎓 Certifications & Education
Professional Scrum Master I (PSM I)
Master's in Computer Science, National Aviation University
Java, Java Developer, Spring Boot, Spring Framework, Back-End Development, REST API, API Integration, Hibernate, Microservice, PostgreSQL, MySQL, Kafka, Kotlin, AWS
Steps for completing your project
After purchasing the project, send requirements so Serhii can start the project.
Delivery time starts when Serhii receives requirements from you.
Serhii works on your project following the steps below.
Revisions may occur after the delivery date.
Call
Let's make a call and discuss all scope of work