Hire the best Core Java Developers in Sri Lanka

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$25 hourly
Chaminda G.
- 4.8/5
- (71 jobs)
Hi, I am from Galle, Sri Lanka , an expert Java developer. I have 21+ years of experience working wit Java and web developments. I have specialized expertise in Service Oriented Architecture (SOA) and Sound with micro-service architecture. In my Upwork career, I have implemented several successful projects with web services. Also, i have done successful B2B integrations via different APIs like REST/SOAP/XML. Also, I have good knowledge and experience working Java, Multi-Threading, Concurrency...etc.I am sound with the Spring framework (Spring boot, Spring MVC + Thymeleaf, Spring Security, Spring Data JPA...etc), J2EE (Jakarta EE) , JMS , JPA, Hibernate, JFX ...etc. For more details, please visit my profile. I have a top-rated Upwork profile. Also, I have strong database knowledge and have worked with MySql , MSSQL, Postgres, Oracle...etc. I am sound with PHP, Pearl, Bash, Python, Lua, Javascript like scripting languages. Also, I have good experience with handling Windows/Linux operating systems.

Core Java
Linux System Administration
Web Service
Oracle GlassFish Server
WSO2
ASP.NET MVC
PHP
Python
API
C#
Java
Amazon Web Services
RESTful API
Spring Boot
AWS Lambda
API Development
$28 hourly
Maduranga E.
- 5.0/5
- (4 jobs)
A highly motivated IT professional launching career as an Associate Tech Lead. - More than 10 years of working experience in Software Engineering with excellent skill in managing the team and gathering the requirements. Have worked in multiple projects on challenging domain areas which gave a very good exposure into Agile methodology. During that particular 10 years of time, I have received many accolades, appreciations and recommendations for the commitment, the quality of work that being displayed in particular roles has been played from the senior management as well as from clients. Also possess, excellent analytical, problem solving, management and coordination skills required to perform responsibilities assigned and working in a challenging environment on tight dead-lines, while building a good relationship between the team members and maintain a good working environment. And always look forward to extend fullest commitment towards client satisfaction. DOMAIN EXPERIENCE - Inventory Management - Production/Manufacturing Monitoring and Management - Financial Services and Management - Telecommunication Applications (SMS gateways/Topup Applocations/USSD apps) - Banking Services - Employee and User Management - Data Analytics (NLP/GENETIC Algorithm, Fuzzy Logic, Neural Networks) - Automobile and Service management - Reservation Management - Dating/Social media applications - Voice Chat bot applications (Alexa/Google Home) TECHNICAL EXPERIENCE - Rest application design and implementation. - Micro-services using Rest. - Dev testing using Junits. - Spring boot/hibernate/spring framework - External module integration such as CRMS, SALESFORCE, ZOHO BOOKS, NAVISION. - Google API integration such as Speech API , G suite API, Google Map API etc.. - AWS lambda - SES, MAILGUN, MAILCHIMP, SQS integrations. - GCP/EC2 Deployments - Docker Experience with Fargate - ALEXA, GOOGLE HOME integrations for voice communication APPLICATION TYPES - Web Apps - Desktop and Standalone apps - Back end Modules - Mobile (Android) APPLICATION TECHNOLOGIES - Java Development (Spring Boot, Hibernate, Sprint Framework) - Nodejs - PHP - Python (Django framework) - JavaScript - jQuery - Meteor - Coffee Script - Arduino C - C - VB - Angular - .NET - HTML - CSS DATABASE TECHNOLOGIES - MYSQL - Mongo DB - MSSQL - Dynamo DB - RDS - Document DB TOOLS AND TECHNOLOGIES - GIT (Bitbucket, GitHub, GitLab) - Linux CMD - Jenkins - Tomcat - Apache2 - Maven - ANT - AWS CLI - VIM - JIRA - IntelliJ - WebStorm - PyCharm - MySQL Workbench/SSMS - Sublime - Postman - Sonar - Veracode - aldon - Wire mock - Wireshark - SVN - Xmind - Draw.io - Jupyter Note Book ORGANIZATIONAL RESPONSIBILITIES - Lead the development team for the project delivery. - Training and Development of the Development process. - Drive the development process and maintain. - Designing Use cases in business level (Using Mind Maps) - Designing the flow diagram and sequence diagram according to the requirement. - Deciding the technologies for the application. - Designing the Database Structure and ER Diagrams. - API design and Architectural level module design. - Review the designs of peer members. - Document all the Designs and Technologies. - Code Review and Peer Code Review Management. - Deploy Artifacts in multiple servers (QA, STG, Production) - Coordinating with QA and BA teams to verify that the Requirement is properly met. - Requirement Analysis, Finalize with BA, Project Leadership and Client. - Manage Project Risks/Issues and Communicate with the Project Leadership - Sprint planning, Project Planning, Effort Estimation, Project Execution, Monitoring, Tracking and Controlling of Development activities - Conduct Meetings with Business team and Manage the start up - Manage Scrum/Sprint Planning sessions - Knowledge sharing with the selected team - Project Kickoffs - CR Management, Impact Analysis and Prioritization. - Analyze existing issues and Document - Mentor team members across all phases of the project EDUCATIONAL QUALIFICATIONS - PG diploma in Artificial Intelligence (2017-2020) - University of Moratuwa - BSc (Hons) in Engineering in Electronic and Telecommunication – University of Moratuwa

Core Java
Enterprise Resource Planning
GraphQL
Zoho CRM
PHP
Django
Laravel
Node.js
JavaScript
React
Alexa Skills Kit
AWS Lambda
Google APIs
Python
$40 hourly
Isuru W.
- 3.9/5
- (4 jobs)
I am passionate on WSO2 solutions with professional development. I have experience in solution architecture and enterprise integration covering multiple technologies. Also I have experience in working with large scale projects, I am through on ; ● Design, configure and implement integration for heterogeneous partners. ● Implementation of API Gateway solution with WSO2 API manager. ● API security integration with Oauth 2.0 and Mutual SSL. ● Implement OpenID Connect based Single Sign On solutions with WSO2 Identity Server. ● Responsible platform delivery including CI/CD process. including follwing technologies; ● Enterprise Integration: WSO2 APIM, EI, MI, IAM ● Continuous Integration and DevOps: Jenkins ● Integration tools: WSO2 Developer Studio, Eclipse, IntelliJ ● Frameworks: Spring Boot, OSGI, Open API 3.0 ● Technologies: Java, Maven, RabbitMQ, Apache Kafka ● Environment: AWS (EC2, SQS, SNS) ● Continuous Integration and DevOps: Kubernetes, Jenkins ● Source code management: Atlassian Bitbucket, Github ● Project Management: Atlassian Confluence, Atlassian JIRA I would like to consult you through high quality delivery

Core Java
JUnit
MySQL Programming
RabbitMQ
Data Integration
Amazon Web Services
API Development
RESTful Architecture
Software Integration
Spring Boot
API Integration
Java
WSO2
$16 hourly
Sanjaya S.
- 4.9/5
- (23 jobs)
As a top-rated software developer on Upwork, I have a track record of developing reliable and user-friendly software using professional coding styles. I have experience in a range of technologies, including Java, C++, C#, JNA, MySQL, MSSQL, JDBC, SIPWISE-VOIP, FFMPEG, Canon Camera SDK-EDSDK, NetBeans, Eclipse, Windows, Linux, and Amazon Web Services. I have recently worked as a software engineer for WelchAmerica LLC, where I was responsible for maintaining and developing kiosk software. I am always looking for challenging projects to showcase my expertise and dedication to delivering high-quality work. I am reliable, honest, and committed to meeting the needs of my clients.

Core Java
JDBC
Database Management
Eclipse IDE
NetBeans
C#
MySQL
C++
Java
$15 hourly
Udara L.
- 5.0/5
- (2 jobs)
Welcome to my Upwork profile! I'm Udara Priyadarshana, a skilled web and mobile app developer with a passion for crafting top-notch digital solutions. With a robust background spanning various technologies, I am here to bring your ideas to life and elevate your online presence. Expertise in JavaScript and More Having delved into the intricate realms of web and mobile development, I boast expertise in a wide array of technologies. My primary focus is on JavaScript and its powerful ecosystem: React : Building dynamic and interactive user interfaces for seamless user experiences. Node.js : Crafting scalable and high-performance server-side applications. React Native : Developing engaging and native-like mobile apps for both iOS and Android. Next.js : Creating server-rendered React applications for enhanced performance. Socket.io : Implementing real-time communication for interactive and dynamic applications. Firebase : Leveraging Firebase for real-time databases, authentication, and cloud functions. In addition to my JavaScript expertise, my toolbox includes: Laravel : Creating robust and efficient backends that power your web applications. Flask : Developing lightweight yet powerful web applications with Python. PHP : Harnessing the power of PHP to create dynamic and feature-rich websites. Java : Crafting versatile applications that run seamlessly across platforms. MySQL and PostgreSQL : Designing and managing efficient databases to ensure data integrity. Redis : Utilizing in-memory data storage for optimizing performance and speed. Bubble.io : Rapidly prototyping and building web applications without compromising functionality. Proven Track Record My journey as a developer has been marked by the successful completion of numerous projects. With a portfolio spanning various industries and use cases, I have honed my skills in creating tailor-made solutions that meet diverse client needs. From e-commerce platforms to social networking applications, I've done it all. Commitment to Excellence What sets me apart is not just my technical prowess, but also my commitment to understanding your unique vision. I believe in collaborative development, working closely with you to turn concepts into reality. With every line of code I write, I'm dedicated to delivering excellence that exceeds expectations. So, whether you're a startup seeking to establish a digital footprint or a business aiming to revamp your online presence, I'm here to offer the expertise you need. Let's embark on a journey of innovation and create digital experiences that leave a lasting impact. Join me in bringing your ideas to life. Let's build the future together.

Core Java
Web Design
Computer Graphics
Bootstrap
Java GUI
Web API
Next.js
React Native
React
Flask
PHP
Laravel
NodeJS Framework
Mathematics
Arduino
PHP Script
Firebase Realtime Database
JavaScript
MySQL
$22 hourly
Gratien D.
- 0.0/5
- (0 jobs)
Core Java
Microsoft Dynamics ERP
X++
Jakarta EE
Visual Basic
Java
$10 hourly
BUHARY M.
- 0.0/5
- (0 jobs)
He is an experienced Software Engineer with masters degree in Computer Science. He started his career as firmware developer for embedded systems in 2005. Then switch to Mobile development in 2009. He has experience in Objective C, Swift, Android development with Java and Kotlin. He also has experience in flutter cross platform development. He worked for several software companies till 2015 and started freelancing. Mainly working for UK and Australian clients. Education Qualifications: BSc in Information Technology, Master of Science in Applied Electronics. Masters in Computer Science (with Distinction pass).

Core Java
Git
Firmware Programming
Embedded C
Embedded System
React Native
Flutter
iOS Development
Android App Development
Android
Objective-C
Swift
Kotlin
C
$10 hourly
Praneeth Dhanushka F.
- 5.0/5
- (3 jobs)
I'm a programming enthusiast who loves and enjoy coding. I do freelancing as it brings more challenges and a great opportunity to gain experience in different areas. I've experience in working as a Full-stack developer using Java (Spring-boot) for backend, Angular for frontend and Flutter for mobile application development. I've completed a bachelor's degree in Computer Science and I've been working as a Software Engineer since 2018.

Core Java
Mobile App Development
Front-End Development
Flutter
Java
Web Application
Spring Boot
Angular
RESTful API
$10 hourly
Chamika D.
- 0.0/5
- (0 jobs)
As a dedicated and innovative software engineer, I bring extensive experience in building robust, scalable, and efficient solutions tailored to meet client needs. My expertise spans across various technologies including Java, Spring Boot, Hibernate, and modern web development frameworks. I have a proven track record in developing complex systems such as e-commerce platforms, workflow automation, and healthcare management systems. I am passionate about delivering high-quality, maintainable code, and I excel in projects that require meticulous planning, precision, and cutting-edge technology. My recent projects include developing API-driven applications using the Ballerina language, building comprehensive e-commerce systems, and integrating advanced AI-driven workflows. What I Offer: Custom Software Development: From concept to deployment, I create tailored software solutions that align with business objectives. API Development & Integration: Expert in building RESTful APIs and integrating third-party services seamlessly. E-commerce Solutions: Design and implement scalable e-commerce platforms, automating processes from order management to payment validation. Database Management: Proficient in MySQL, providing robust database designs and optimization. Modern Web Development: Utilizing HTML, CSS, and JavaScript to create interactive and user-friendly interfaces. With a commitment to quality and a client-first approach, I am ready to bring your vision to life. Let's connect and discuss how I can help you achieve your business goals!

Core Java
Copywriting
English to Russian Translation
Russian to English Translation
Translation
English to Ukrainian Translation
Bootstrap
CSS
JavaFX
React
API Development
Web Design
Hibernate
Spring MVC
Spring Boot
JavaScript
Java
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