With over 25 years in software development, including two decades as a remote work freelancer, I bring a lot of expertise to your Java projects. I've partnered with over 40 companies across the globe, successfully navigating more than 60 diverse software initiatives – from intricate small-scale solutions to complex enterprise systems. My commitment to efficiency is amplified by my early adoption of AI tools in 2024, ensuring faster project completion without compromising quality. My journey began with formative years at Nokia Mobile Phones (1995-1997) and other Finnish IT firms, followed by international experience in Germany (2000-2002). Today, I continue to deliver top-tier remote development services from my base in Southeast Asia, offering a blend of deep technical skill, broad project experience, and a results-driven approach.

I am a skilled Java Backend Developer with strong experience designing and building scalable, high-performance backend systems. Throughout my career, I’ve developed expertise in Java and a wide range of modern backend technologies and frameworks. ✅My core skills include: ✔️Java (19+), Spring Framework, Spring Boot, Spring Data JPA, Spring Security, Spring AOP ✔️RESTful APIs, GraphQL, Web Services ✔️Hibernate, Microservices Architecture ✔️Databases: MySQL, PostgreSQL, Oracle ✔️Build & DevOps Tools: Maven, Docker, Git ✔️Event Streaming: Apache Kafka I earned a certification as an AI Automation Specialist (n8n), expanding my skill set in automation and intelligent system development. I also have working knowledge of additional technologies such as C++, Python, and frontend basics, giving me a well-rounded understanding of full-stack development. I'm passionate about clean code, efficient systems, and delivering reliable, production-ready solutions. Whether you're building a new backend service or need help improving an existing one, I'm here to help.

I am a Java/J2EE Developer with 7+ years of experience in building scalable and secure web applications using object-oriented and client–server technologies. I specialize in backend development, REST APIs, and enterprise-grade solutions. 🚀Core Technologies Java, Core Java, Java Collections Framework, Spring Framework, Spring Boot, Spring MVC, Java Servlet API, Java Persistence API (JPA) 💻 Web & Application Development Web Application Development, Application Testing & Maintenance, RESTful API Development, Microservice-ready Architecture 🛠️ Low-Code Platforms Case360 – Car Damage Assessment Application Appworks (LowCodeGuide) – BSI Enterprise Application 📂 Tools & Development Practices Git, GitHub, Version Control, Agile Software Development, Jira 🏆 Projects & Achievements CRM Application using Spring Boot APIs ERP System for Construction Sites (Project-based Spring Boot solution) Car Damage Assessment Application (Case360) BSI Application (Appworks Low-Code Platform) Academic Project: Organization Management System for student data, assignments, and class records I focus on delivering clean, maintainable, and business-oriented solutions with strong attention to performance and scalability.

Certified Senior Software Engineer with 6 years of experience in Backend Developement.. Certifications: - Oracle Certified Associate Java Programmer - 75% - Oracle Certified Professional Java Programmer - 80% - VMware Spring Professional Certification Exam - 85% - Oracle Database 19c Administration Level 1 - 65% Courses and Practice tests: - Over 40 hours of educational video courses for Java EE - Over 800 practice tests written for the VMware Spring Professional Certification Exam - 200 practice tests written for Oracle Database 19c Administration Level 1 Exam - 100 practice tests for OCP Java exams Techlogies I feel confident working with: - Java EE - Collections, Streams, Multithreading, JDBC, Servlets, etc. - Spring/Spring Boot - AOP, MVC, Security, REST, etc - Reactive programming - Project Reactor, Spring WebFlux - Hibernate - RDBMS(Oracle DB, MySQL, MSSQL, PostgreSQL) - JUnit, Mockito - Apache Kafka - Docker - Linux - Jenkins

Top-Rated Java Developer | $40K+ Earned | 100% Job Success With over $40K earned on Upwork, I am a highly skilled Java Developer with experience across 8 international projects. My expertise has consistently earned me 5-star ratings, making me a top-rated freelancer on the platform. I specialize in Java and J2EE technologies, delivering robust and scalable solutions that exceed client expectations. Highlights: - 8 International Projects successfully completed, including complex real-time systems and enterprise applications. - $12,460 Project for Java Stream Analyzer using Esper CEP and Spring Boot. - 500+ Hours dedicated to delivering high-quality solutions for clients globally. Client Feedback: "Ashish is the best developer we’ve worked with so far!" "Exceptional Java expertise with a perfect blend of professionalism and dedication." Looking for a reliable and proficient Java Developer? Let’s connect and bring your project to life with top-tier development services. Availability: More than 30 hours/week | $30/hr

Java developer with 5+ years of building full-stack applications, backend systems, REST APIs, microservices, cloud infrastructure on AWS, GCP, and Azure, database design in PostgreSQL and MySQL, and modern frontend frameworks like React and Angular. I've shipped 35+ production projects across fintech, logistics, telecommunications, retail, SaaS, healthcare, enterprise and more. On the backend, my core stack is Java, Spring Boot, and Spring Framework, with REST APIs, Hibernate/JPA, PostgreSQL, MySQL, MongoDB, and SQL for persistence. For infrastructure I work across AWS, GCP, and Azure, and I'm comfortable with Docker for containerisation and environment consistency, Kubernetes, and CI/CD pipelines. When a project needs it, I also write Python, Node.js, and front-end code in React or Angular, including JavaScript for client-side logic. I have working experience with PHP for web backend tasks, and I've applied Python beyond scripting, including data processing pipelines and ML-adjacent work such as model integration and feature engineering. The impact side: over 5 years I've designed 120+ REST APIs, built 10+ microservice architectures from the ground up, and worked on systems serving anywhere from 10K to 500K+ users depending on the project scale. Performance work is something I take seriously: on several engagements I've cut API response times by up to 60% and improved overall system performance by 40%+ through targeted refactoring and architectural improvements, rather than costly rewrites. I've also worked extensively with enterprise-level database schemas, writing and optimising complex SQL queries, indexing strategies, and data models across tables with 100K+ records. The production systems I've maintained have consistently held 99.9% uptime, which at that scale doesn't happen by accident. It comes from solid monitoring, thoughtful deployment practices, and knowing where the failure points are before they become incidents. My clients get clear communication, fast responses, and code that's actually maintainable six months later. I'm business-focused; I care whether the thing solves your problem, not just whether it compiles. As one client put it: "he doesn't just write code; he thinks about why we need it in the first place." Not only a Java developer, I've led teams, mentored junior devs, and run cross-functional projects where the technical and the human side both needed managing. Clean code matters. So does knowing when to push back, when to unblock someone, and when to just make the call. I am always open to long-term collaborations and challenging software engineering projects involving Java, Spring Boot, React, Angular, cloud systems, microservices architecture, and modern backend engineering. Need a Java developer who ships clean code and tells you when you're building the wrong thing? That's the conversation worth having. Drop me a message.

⭐⭐⭐⭐⭐"Mykyta has exceptional characteristics both in hard and soft skills. He took a part in complex software development projects as a part of a large mixed group. The feedback from our customers and team is always positive." ⭐I'm the highest-rated and highest-earning Java & Groovy freelancer on Upwork with numerous 5-star reviews, including overly positive feedback. ⭐ I've developed different custom specific software using modern java & groovy software using microservice and monolithic architecture, improved performance, refactored and tested in next business domains: ✅ Utilities ✅ Fintech ✅ Auto ✅ Security ✅ Cryptocurrency ✅✅✅ Brief information about me! ✅✅✅ ✅ Senior Java & Groovy Software Engineer ✅ Specializing in back-end development | Cloud Integrations (AWS, GCP, Azure) ✅ I have over 6.5+ years of experience in Java development ✅ Experienced both in developing software from scratch and maintaining large existing projects ✅ I have hands-on experience in developing back-end web services with micro-service or monolith architecture using Java technology stack, including modern cloud-based solutions. 🌟 WHY YOU SHOULD CHOOSE ME OVER OTHERS? 🌟 ✅ Clients' feedback: I am concentrating on giving VALUE and bringing SUCCESS to all of my customers, earning their TRUST and helping them to EARN MONEY. ALL customers' feedback on my Profile is extremely important to me and proves the value that I provide. ✅ Responsiveness: Communication is extremely important as a part of every business ever existed, and once it is fast and clear, it may lead to awesome results, that's why I tend to be available for my customers in no time, reply fast and clear, as well as I try to be fair, understanding and responsive. ✅ Kindness and Empathy: My main personal principles that I implement in every facet of my life. Treating everyone with respect, aiming to understand the whole situation or problem to solve the pain of my client, and constantly work to IMPROVE the client's product. 🙋🏼‍♂️I am eager to work with you, to provide high-quality code, reliable, consistent solutions, solve your problems and bring success to your business. Contact me, and we will discuss how we can work together to FULLY meet your Business Needs, follow your business rules, and bring you success. A big area of expertise: - REST API design and development - Horizontally scalable and highly available systems - Automating development workflows and deployment pipelines - Micro-service design and development - Design and development of decentralized applications (DApps) - Monitoring, log aggregation - Java and Groovy development - Service-Oriented architecture - Spring Framework (including cloud-based stack) - Experience in NoSQL Development (MongoDB, Neo4j) - Performance and Scalability Optimization Huge Skills & Technologies set: - Java/Groovy - AWS - Linux (with distributives) - Jenkins, CircleCI, Rundeck, Rancher - Docker - MySQL, Postgres - Redis, MongoDB, Neo4j. - RabbitMQ, ActiveMQ, SQS, RabbitMQ

⚡ Backend systems should not become fragile over time; they must stay maintainable, scalable, and reliable as products grow. I am a Backend Engineer specializing in Java, Kotlin, and Spring Boot, focused on building production-grade systems where clean architecture, long-term maintainability, and stability are critical. I combine strong backend engineering practices with practical system design to create APIs and services that remain easy to extend, debug, and operate in real-world environments. Clients work with me when system quality, clean code, and scalable backend architecture matter, not just feature delivery. 🏆 Proven Engineering Approach ✔ Clean, maintainable backend architecture ✔ Production-focused development mindset ✔ Long-term scalability and reliability focus ✔ Clear communication and structured collaboration 🚀 Core Capabilities ☕ Backend Engineering with Java & Kotlin • Spring Boot application development • REST API design & implementation • Business logic architecture • Secure and maintainable backend systems • Performance-focused backend development 🏗 Scalable System Architecture • Microservice-based architectures • Modular and maintainable code structure • Service communication patterns • Production-ready backend design • Reliability and scalability optimization 🗄 Database & Persistence Engineering • PostgreSQL, MySQL, MongoDB • Hibernate / JPA / Spring Data JPA • Query optimization & data modeling • Relational and NoSQL database design ⚙ Development & DevOps Workflow • Docker-based environments • Git-based development workflows • Unit & integration testing • CI/CD-friendly project structures 🔍 Engineering Focus 🏢 Enterprise & Business Platforms Scalable APIs • backend services • maintainable systems 🚀 Startup Products & SaaS Platforms Fast iteration • clean architecture • long-term scalability 💡 Engineering Mindset • Architecture-first thinking • Clean and understandable code • Simplicity over over-engineering • Production reliability focus • Ownership from development to deployment • Long-term maintainability mindset 🧰 Technical Stack Java • Kotlin Spring Boot • Spring MVC • Spring Data JPA REST APIs • Microservices PostgreSQL • MySQL • MongoDB Hibernate • JPA Docker • Git ✨ Why Clients Choose Me ⭐ Clean and maintainable backend architecture ⭐ Scalable production-ready systems ⭐ Strong Java & Kotlin expertise ⭐ Clear communication & accountability ⭐ Reliable engineering mindset 🚀 Ready to Build Stable, Scalable Backend Systems? If you need a backend engineer who cares about clean architecture, maintainable systems, and production reliability, I am ready to help. Let us build backend systems that stay reliable, scalable, and easy to maintain long after launch.

Softwere Engineer withl experience building Enterprise and Mobile applications. Proficient in full-stack development,particularly the Java and angular technologies

I'm a Java-developer with 7+ experience in building enterprise applications. Working for the customer, I have 100 percent success and solve problems in the shortest possible time. My skill set includes technologies for backend: ⭐Spring ⭐Hibernate ⭐SQL ⭐Kotlin ⭐Apache Tomcat ⭐Jboss ⭐Maven ⭐Gradle Frontend: ⭐Angular ⭐Typescript ⭐Vaadin DevOps: ⭐Jenkins ⭐Teamcity ⭐uDeploy ⭐Kubernetes ⭐Openshift ⭐Linux ⭐Bash ⭐Python ⭐Groovy Also I developed several applications from scratch: ⭐Telegram bot for real estate searching ⭐Telegram game: text RPG-game ⭐Spring-boot application for working with customer ⭐Android puzzle game I am ready to work and develop professionally, contributing to the growth of your organization.