Karthikeyan is available for hire

Karthikeyan Thirunavukarasu

Verified Expert in Engineering

Software Developer

Bengaluru, Karnataka, India

Toptal member since September 28, 2021

Expertise

Back-end Developers Java Full-stack Cloud Engineering Front-end Spring Microservices Development SQL REST API Jira GitHub Spring Boot AWS UML

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

Availability

Part-time

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, 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, 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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