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Karthikeyan Thirunavukarasu
Verified Expert in Engineering
Software Developer
Bengaluru, Karnataka, India
Toptal member since September 28, 2021
Bio
Karthikeyan is a senior software engineer with 10+ years of enterprise-level experience, including Sony India and IBM. He has specialized in Java back-end development and worked with microservices and cloud technologies. Karthikeyan is also a Certified Smart Contract Developer and eager to bring his expertise and enthusiasm to blockchain development projects.
Portfolio
Bilt Technologies Inc
Java, REST APIs, Spring Boot, JEE, Quarkus, GitHub, Docker, PostgreSQL, Cloud...
Maersk
Java 8, Agile, Microservices, Spring Boot, REST APIs, Jira, GitHub...
Altimetrik India
Java, Hibernate, JPA, Microservices, REST, Spring, Terraform, Spring Boot...
Experience
- Back-end Development - 13 years
- Java - 11 years
- Microservices - 6 years
- Spring - 6 years
- REST APIs - 6 years
- Amazon Web Services (AWS) - 4 years
- React Native - 3 years
- Terraform - 2 years
Preferred Environment
Windows, MacOS
The most amazing...
...experience has been gaining expertise in blockchain development.
Work Experience
Back-end Developer
2021 - 2023
Bilt Technologies Inc
- Developed a microservice-based application for reporting rent users to bureaus for a financial services company.
- Managed and fixed bugs or enhancement requests on the reporting module.
- Collaborated with bureaus and clients to get functional requirements and implemented them with high-quality deliverables.
Technologies: Java, REST APIs, Spring Boot, JEE, Quarkus, GitHub, Docker, PostgreSQL, Cloud, Back-end, React Native, Microservices Architecture, APIs, Infrastructure as Code (IaC), Cloud Infrastructure, DevOps, Back-end Development, Amazon Web Services (AWS), CI/CD Pipelines
Senior Software Engineer
2021 - 2022
Maersk
- Worked as an individual contributor for a search engine that identifies the proper code for a free text search.
- Handled cognitive search and text analysis to improve the success percentage.
- Participated in Agile practices like scrum calls, daily stand-ups, retrospective meetings, and other release activities.
- Implemented Power BI to analyze the data and provide actionable information.
Technologies: Java 8, Agile, Microservices, Spring Boot, REST APIs, Jira, GitHub, Object-relational Mapping (ORM), Docker, Cloud, Back-end, React Native, Microservices Architecture, APIs, Infrastructure as Code (IaC), Cloud Infrastructure, DevOps, Back-end Development, Amazon Web Services (AWS), CI/CD Pipelines, Kubernetes, AWS DevOps, Business Intelligence (BI), Microsoft Power BI, Camunda BPM
Staff Software Engineer
2019 - 2021
Altimetrik India
- Developed multiple microservices applications using proper microservices design practices.
- Implemented the entire back-end for three microservices applications in one project.
- Learned and applied many AWS cloud technologies while working on a serverless architecture-based application.
- Used Power BI to optimize the internal business process.
- Developed Camunda workflow BPMN diagrams and used Camunda Rest engine to interact with applications to manage.
Technologies: Java, Hibernate, JPA, Microservices, REST, Spring, Terraform, Spring Boot, REST APIs, JavaScript, Angular, Amazon Web Services (AWS), Jira, GitHub, Object-relational Mapping (ORM), PostgreSQL, Cloud, Design Systems, Back-end, Microservices Architecture, APIs, Infrastructure as Code (IaC), Cloud Infrastructure, Back-end Development, CI/CD Pipelines, Business Intelligence (BI), Microsoft Power BI, Camunda Platform, Camunda BPM
Technical Competency Manager
2018 - 2019
Sony India
- Worked in operations and contributed to all areas, including new proposals and appraisals.
- Developed and maintained application development project plans, including scopes of work and schedules.
- Identified and documented critical path activities and dependencies in project plans.
Technologies: Java 8, Agile, Google Cloud Platform (GCP), Spring, Spring Boot, Apache Maven, HTML, JavaScript, Bootstrap, Java, Amazon Web Services (AWS), Jira, GitHub, Management, Object-relational Mapping (ORM), Design Systems, Back-end, Leadership, Microservices Architecture, APIs, Infrastructure as Code (IaC), Cloud Infrastructure, Back-end Development, Business Intelligence (BI), Microsoft Power BI
Technical Lead
2018 - 2018
LTI
- Served as a back-end developer and handled change requests in the existing system.
- Participated in Agile practices, including daily stand-ups, retrospectives, and other release activities.
- Provided high-quality technical solutions and workarounds in short time frames.
Technologies: Java, Microservices, Spring Boot, Agile, Splunk, AppDynamics, Scrum, REST APIs, JavaScript, Full-stack, Jira, GitHub, Back-end, Leadership, Microservices Architecture, APIs, Infrastructure as Code (IaC), Back-end Development
Senior Software Engineer
2016 - 2018
Envestnet Yodlee
- Handled new requirements and change requests in the existing system in collaboration with the server-side development team.
- Participated actively in client interactions for specification-related queries, design- and code-level reviews, and development activities.
- Engaged in Agile practices, such as Scrum calls, daily stand-ups, retrospective meetings, and other release activities. Gained experience with Jira and Kanban boards.
- Provided technical guidance and assistance to the team while serving as a senior developer.
Technologies: Java, Selenium, Jira, Scrum, Agile, GitHub, Relational Databases, Back-end, Microservices Architecture, Back-end Development
Senior Software Engineer
2015 - 2016
QuEST Global Engineering Services Private Limited
- Assisted in developing POCs and took the lead on finding the most suitable and customizable API manager to monitor the REST APIs.
- Implemented a BDD framework using Cucumber and executed business cases.
- Participated in Agile practices, including Scrum calls, daily stand-ups, retrospective meetings, and other release activities. Gained experience with JBehave, Cucumber, and WSO2.
Technologies: Java, Test-driven Development (TDD), Behavior-driven Development (BDD), JBehave, Cucumber, REST, Agile, Scrum, SQL, Relational Databases, Back-end, Back-end Development, Medical Imaging
Senior Software Engineer
2014 - 2015
HCL Technologies
- Assisted in developing several major modules of the application.
- Interacted directly with the client, Standard Chartered Bank, to address specification-related queries and design- and code-level review activities.
- Worked with the Apache Struts framework and assisted with the development of categories.
- Configured and generated code coverage using SonarQube.
- Owned the delivery of zero-defect implementation and unit testing coverage.
Technologies: Java 8, Apache Struts 2, HTML, Ajax, CSS, SonarQube, Oracle, Java, Apache Struts, SQL, Team Leadership, Object-relational Mapping (ORM), Relational Databases, Back-end, Leadership, Back-end Development
Senior Software Engineer
2010 - 2014
LTI
- Implemented multitenant support and logical grouping of supported devices to monitor and control.
- Handled change requests in the existing system while working as a core back-end developer.
- Participated in client interactions for specification-related queries, design- and code-level reviews, and development activities.
- Worked as an on-site coordinator and interacted closely with clients and offshore teams to achieve high-quality deliverables.
- Took part in Agile practices, such as Scrum calls, daily stand-ups, retrospective meetings, and other release activities. I also gained experience with Jira.
Technologies: Java, Adobe Flex, Apache Struts 2, Hibernate, Ant Design, Apache Struts, Agile, Scrum, Jira, JavaScript, SQL, CSS Grid, Team Leadership, Object-relational Mapping (ORM), Relational Databases, Back-end, Leadership, Front-end, UML, Back-end Development
Associate System Engineer
2008 - 2010
IBM
- Played a key role in developing a work log system for the employees of Mitsubishi Motor Corporation.
- Owned the delivery of a zero-defect implementation and unit test coverage.
- Delivered data model or UML diagrams, including high-quality class diagrams, sequence diagrams, and data model diagrams created with StarUML.
- Contributed proactively to client interactions and stakeholder meetings to understand the requirements and develop quality deliverables.
Technologies: Java, Jakarta EE (Java EE or J2EE), MySQL, StarUML, JUnit, IBM Db2, Relational Databases, Back-end, UML, Back-end Development
Experience
Payment Gateway Application
A microservices design-based payment gateway application deployed on AWS via Terraform for a big payment clearing house company. As the sole back-end developer, I developed back-end for front-end support applications.
Cloud Interactive Application
A Java-based microservices application I developed to interact easily with multiple cloud service providers, including AWS, GCP, and Azure. The application reduces the developer burden while maintaining applications.
Severless Architecture Application
Serverless architecture for an AWS environment. I developed the application for interacting with DynamoDB records directly without AWS EC2 instances on all-time available servers. The main reason for the design was in consideration of the API call frequency.
E-Suit
An application for advocates to monitor and maintain the case status. This flutter framework architecture-based application is built using Dart language. I have worked on UI front and created the application. A few packages used in the applications are web-view, HTTP, Flutter-OTP, and Flutter-SMS.
Education
2004 - 2008
Bachelor's Degree in Electronics and Communication Engineering
RVS College of Engineering and Technology - Dindigul, Tamil Nadu, India
Certifications
SEPTEMBER 2021 - PRESENT
Certified Smart Contract Developer
Blockchain Council
APRIL 2021 - PRESENT
Japanese NAT N4 Certification
Senmon Kyouiku Publishing Co. (Shinjuku-ku, Tokyo, Japan)
Skills
Libraries/APIs
REST APIs
Tools
Terraform, Jira, GitHub, Microsoft Power BI, Camunda BPM, Apache Maven, Splunk, AppDynamics, Cucumber, SonarQube, StarUML, AWS IAM, Git, Jenkins
Languages
Java, Solidity, SQL, Dart, UML, Java 8, HTML, JavaScript, CSS
Frameworks
Spring, Spring Boot, React Native, Flutter, JPA, Bootstrap, Selenium, JBehave, Apache Struts 2, Adobe Flex, Hibernate, Ant Design, JUnit, Apache Struts, Angular
Paradigms
REST, Microservices, Object-relational Mapping (ORM), Microservices Architecture, DevOps, Business Intelligence (BI), Agile, Test-driven Development (TDD), Behavior-driven Development (BDD), Scrum, Management
Platforms
Amazon Web Services (AWS), Blockchain, Ethereum, Google Cloud Platform (GCP), Oracle, Jakarta EE (Java EE or J2EE), Azure, AWS Lambda, JEE, Docker, Kubernetes
Storage
Relational Databases, PostgreSQL, MySQL, Amazon DynamoDB, IBM Db2
Other
Smart Contracts, Back-end, APIs, Back-end Development, Front-end, Full-stack, CSS Grid, Team Leadership, Cloud, Leadership, Infrastructure as Code (IaC), Cloud Infrastructure, CI/CD Pipelines, Camunda Platform, Ajax, API Gateways, Japanese, Cryptocurrency, Quarkus, Design Systems, AWS DevOps, Medical Imaging
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