Selvaraj Kannaiyan - Senior Full Stack & Cloud Architect

Q: Where is Selvaraj based?

Selvaraj is based in Wiesbaden, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Selvaraj speak?

Selvaraj speaks the following languages: English (Native), Tamil (Native), German (Intermediate) .

Q: How many years of experience does Selvaraj have?

Selvaraj has at least 14 years of experience. During this time, Selvaraj has worked in at least 6 different roles and for 6 different companies . The average length of individual experience is 2 years and 3 months . Note that Selvaraj may not have shared all experience and actually has more experience.

Q: What is Selvaraj's latest experience?

Selvaraj's most recent position is Senior Full Stack & Cloud Architect at HCLTech .

Q: What companies has Selvaraj worked for in recent years?

In recent years, Selvaraj has worked for HCLTech and Capgemini .

Q: Which industries is Selvaraj most experienced in?

Selvaraj is most experienced in industries like Banking and Finance , Information Technology (IT) , and Telecommunication .

Q: Which business areas is Selvaraj most experienced in?

Selvaraj is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Selvaraj also has some experience in Project Management and Quality Assurance (QA) .

Q: Which industries has Selvaraj worked in recently?

Selvaraj has recently worked in industries like Banking and Finance .

Q: Which business areas has Selvaraj worked in recently?

Selvaraj has recently worked in business areas like Information Technology (IT) , Product Development , and Project Management .

Recommended expert

Wiesbaden, Germany

Experience

Oct 2021 - Aug 2025

3 years 11 months

Wiesbaden, Germany

Senior Full Stack & Cloud Architect

HCLTech

Led end-to-end implementation of the Miles and More Credit Card Service integrating with TSYS systems on Microsoft Azure
Architected secure, scalable APIs and microservices using Spring Boot, Camunda, and Apache Kafka (Confluent Platform) for real-time event streaming and process automation on Azure Kubernetes Service
Managed full development lifecycle of the credit card system on Azure Cloud including fraud detection, payment processing, account management, and Kafka-based event-driven data pipelines
Designed and implemented Kafka Connect integrations and Schema Registry for seamless data flow between microservices and legacy systems
Introduced Agile best practices, improving team efficiency by 30% and reducing project delivery time
Directed and mentored a team of 15+ developers fostering a collaborative, cloud-first, and innovation-driven culture
Managed client relationships achieving 95% satisfaction and securing follow-up projects through consistent delivery excellence
Designed and deployed BPMN/DMN models in Camunda for complex business workflows and automation
Configured Camunda Engine with advanced features such as error handling, RPA integration, and multi-version deployments
Integrated Camunda and Kafka-based messaging with core banking systems ensuring high availability and data consistency
Managed multi-database schema configurations on Azure and optimized system performance for high throughput and fault tolerance
Designed and implemented cloud architecture patterns on Azure focusing on multi-region resilience, data sovereignty, and event-driven scalability for critical financial workloads

Aug 2019 - Oct 2021

2 years 3 months

Senior Consultant

Capgemini

Developed a digital platform for Alert Breach Management in the FX/FI trading system leveraging Camunda workflow engine, Spring Boot, Apache Kafka, and Oracle for real-time monitoring and automated rule-based alerting
Served as full stack developer covering analysis, design, development, and unit testing for a scalable microservices architecture with a ReactJS SPA front end integrated with AEM and deployed on AWS Cloud
Implemented second-level ID validation for traders using Camunda Process APIs and workflow rule automation ensuring compliance and operational efficiency
Utilized Camunda BPMN, Kafka-based event streaming, Spring Boot, and PingID for secure authentication with a ReactJS back-office application consuming REST APIs and gRPC services (Golang) protecting Keycloak-based identity systems
Deployed and managed microservices on AWS using Docker ensuring high scalability, resilience, and maintainability of trading operations

Dec 2017 - Aug 2019

1 year 9 months

Technical Architect

Verizon

Developed ATOM services to establish a digital platform for B2B & C2C e-commerce portal with backend services including address qualification, product API, cart API, number portability, credit check, payment gateway integration, and order submission using ReactJS within an AEM cloud single-page component-based architecture
Designed a single-page ATOM architecture for an e-commerce online web portal encompassing various telecommunication products
Developed microservices based on Golang gRPC employing protobuf for efficient network communications across multiple channels
Designed and integrated common REST and SOAP web services with HTTP, JMS, and MQ in Kafka following a hub-and-spoke architecture to integrate front-end channels with the in-house offer engine CRM
Devised a real-time interface solution for address verification using Ping products and integrated customer management repository with Elasticsearch
Defined Camunda workflow rules implementing HTTP connectors, expressions, and Java for the end-to-end ordering application process
Architected AWS cloud platform infrastructure for numerous microservices deploying with effective versioning techniques (jgitflow) and enabling graceful shutdown and restart with AWS Lambda

Jan 2017 - Dec 2017

1 year

Assistant Manager

Citicorp Services India Ltd.

Developed an analytical platform for Fundamental Review of Trade Book using multiple Spring Boot services with a document-based database and Kafka for FRTB apps such as DataRecon, Data Transform, and DataSync
Implemented a ReactJS-based grid mechanism for multi-sort filtering on trade data with server-side pagination
Provided end-to-end design solutions and change specifications for Fundamental Review of Trade Book for foreign exchange and investment
Developed big data analytical microservices to assess trader and investor risk using trade schemas
Created data-transform and data-reconciliation APIs to calculate trader and bank risk
Developed Spring Boot microservices with Swagger API documentation using Couchbase and Kafka Confluent, Apache Storm

Apr 2015 - Jan 2017

1 year 10 months

Software Engineer

Royal Bank of Scotland

Implemented LMMS providing authentication to RBS internet banking resources with Retail 4p and SSL for partial PIN and password verification and token generation
Developed F-SSO enabling single sign-on across multiple systems using SAML protocol, allowing users to authenticate once per session and access all authorized services without re-login

Jul 2011 - Sep 2014

3 years 3 months

System Engineer

IBM India Private Limited

Served as application developer on the Referential Data System team for Bank of America monitoring and reporting health of BOA applications
Developed multiple rules based on application logs to detect errors, issues, and performance problems
Designed a dashboard updated every 8 hours to monitor application status, errors, memory issues, and performance for support teams

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Banking and Finance (12 years), Information Technology (3 years), and Telecommunication (1.5 years).

Banking and Finance

Information Technology

Telecommunication

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (13.5 years), Product Development (8.5 years), Project Management (4 years), Business Intelligence (4 years), and Quality Assurance (3 years).

Information Technology

Product Development

Project Management

Business Intelligence

Quality Assurance

Summary

Senior Full Stack & Cloud Architect with over 14 years of experience designing, developing, and deploying resilient, event-driven software solutions across financial and enterprise domains. Skilled in Java, Python, ReactJS, Camunda BPM, AWS, and Microservices, with 5+ years of hands-on expertise in Apache Kafka (Confluent, AWS MSK, and open-source distributions). Proven ability to architect secure, scalable, and streaming-based cloud platforms, focusing on data sovereignty, operational resilience, and multi-cloud strategies to reduce vendor lock-in and geopolitical risks. Experienced in implementing real-time data streaming solutions using Kafka Connect, Kafka Streams, KSQL, and Schema Registry, and deploying Confluent Cloud services such as ksqlDB Cloud and Apache Flink. Strong background in Docker, Kubernetes, and CI/CD pipelines, with familiarity in stream governance, data lineage, and modern event-driven architectures.

Skills

Core Java
Data Structures
Spring
Camunda Bpm
Bpmn
Kafka
React.js
Microservices
Cassandra
Aws
Docker
Kubernetes
Iam
Api Gateway
Pingfederate
Dynamo Db
Mango Db
Sql Server
Open Api
Soap Web Services
Restful Web
Reactive Programming
Grpc
Golang
Angularjs
Azure
Confluent
Apache Flink
Python

Languages

English

Native

Tamil

Native

German

Intermediate

Education

Oct 2007 - Jun 2011

PSG College of Technology

B.Tech/B.E. · Coimbatore, India

Certifications & licenses

Oracle 11g Fundamentals

Oracle

Oracle Certified Java Professional

Oracle

Profile

Created

November 2025

Last Update

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Selvaraj based?

Selvaraj is based in Wiesbaden, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Selvaraj speak?

Selvaraj speaks the following languages: English (Native), Tamil (Native), German (Intermediate).

How many years of experience does Selvaraj have?

Selvaraj has at least 14 years of experience. During this time, Selvaraj has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 2 years and 3 months. Note that Selvaraj may not have shared all experience and actually has more experience.

What roles would Selvaraj be best suited for?

Based on recent experience, Selvaraj would be well-suited for roles such as: Senior Full Stack & Cloud Architect, Senior Consultant, Technical Architect.

What is Selvaraj's latest experience?

Selvaraj's most recent position is Senior Full Stack & Cloud Architect at HCLTech.

What companies has Selvaraj worked for in recent years?

In recent years, Selvaraj has worked for HCLTech and Capgemini.

Which industries is Selvaraj most experienced in?

Selvaraj is most experienced in industries like Banking and Finance, Information Technology (IT), and Telecommunication.

Which business areas is Selvaraj most experienced in?

Selvaraj is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Selvaraj also has some experience in Project Management and Quality Assurance (QA).

Which industries has Selvaraj worked in recently?

Selvaraj has recently worked in industries like Banking and Finance.

Which business areas has Selvaraj worked in recently?

Selvaraj has recently worked in business areas like Information Technology (IT), Product Development, and Project Management.

What is Selvaraj's education?

Selvaraj holds a Bachelor from PSG College of Technology.

Does Selvaraj have any certificates?

Selvaraj has 2 certificates. These include: Oracle 11g Fundamentals and Oracle Certified Java Professional.

What is the availability of Selvaraj?

Selvaraj is immediately available full-time for suitable projects.

What is the rate of Selvaraj?

Selvaraj's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.