Rajkumar Jayakumar
Cloud & Technology Architect
Halifax, Nova Scotia, Canada | rajkumar.jayakumar@rajutechie.com | rajutechie.com | linkedin.com/in/rajujrk | github.com/rajujrk
Summary
18+ years in software delivery, the last eight as an architect at Cognizant for Pacific Life, The Hartford, Nike and Telstra. I re-platform monoliths into secure Spring Boot microservices on AWS and Azure, automate infrastructure with Terraform, and build generative-AI products, two of which are live.
Generative and agentic AI
I design and implement Generative AI and agentic AI solutions for healthcare, built on agentic AI architecture, large language models and enterprise GenAI solution architecture.
- Diabetes prediction and management: Agentic AI workflows and Generative AI analyse patient data to support diabetes risk prediction and deliver personalised health insights and recommendations.
- Breast cancer analysis and early detection: Deep learning and medical image analysis, combined with Generative AI, support breast cancer detection and diagnostic workflows.
Skills
- Client
- React, TypeScript, Angular, Vue, Next.js, Micro-frontends, Tailwind CSS
- Mobile & desktop
- Flutter, Swift & SwiftUI, PyQt
- Services
- Java, Spring Boot, Hibernate & JPA, Microservices, Python, Django & DRF, RabbitMQ, REST & WebSockets, FastAPI, Kafka, Celery, Node.js
- Data
- PostgreSQL, Oracle, MySQL, MongoDB, Redis
- AI
- OpenAI GPT-4 & Whisper, Anthropic Claude API, Gemini Live, RAG & LangChain, Agentic AI & agent orchestration, PyTorch, ONNX, Hugging Face Transformers, OpenCV
- Cloud platform
- AWS, Azure, Kubernetes (EKS, AKS), Serverless (Lambda, EventBridge), GCP (Cloud Run, GKE), OpenShift, Pivotal Cloud Foundry
- Infrastructure & delivery
- Terraform, Docker, Jenkins, CloudFormation, Azure DevOps, Bamboo & Bitbucket Pipelines, Prometheus
- Security & practice
- OAuth2 & JWT, Agile delivery, Spec-driven, AI-assisted development, Multi-tenancy & row-level security, Six Sigma
Experience
Cloud & Technology Architect, Cognizant Technology Solutions Canada
Sep 2022 – present (4 years 2 months) | Halifax, Nova Scotia, Canada
Re-platforming legacy monoliths into cloud-native microservices on AWS and Azure for insurance and retail clients: Terraform automation, CI/CD with security built in, and generative-AI solutions for claims and contracts.
- Pacific Life Insurance, Contract Management and MyAccount: Moved Pacific Life's scheduled batch work from Quartz to serverless, and automated claims with OCR.
- The Hartford, MyAccount and XactPay: Took The Hartford's premium audits from paper to digital and moved bank validation behind an API.
- Nike, SMx Samples Management: Nike's apparel-samples process on AWS, provisioned entirely in Terraform with micro-frontends.
Technology Architect, Cognizant Technology Solutions
Jan 2018 – Sep 2022 (4 years 9 months) | Chennai, India
Cloud and DevOps architect for Telstra programmes — invoicing microservices, automated platform verification, emergency-call retrieval and eSIM support — on ECS, EKS and Pivotal Cloud Foundry.
- Telstra, DS-Invoicing: Receipt and invoice microservices for every Telstra payment scenario, on ECS and EKS.
- Telstra, AVITA: Automated platform verification tests that Telstra teams run from a UI or an API.
- Telstra, 000 Legacy Call Retrieval: The operator system behind Australia's 000 emergency line for answering and dispatching calls.
- Telstra, eSIM Help and Support: Support app for Telstra's eSIM launch, the first in Australia.
Technical Lead, Infinite Computer Solutions
Aug 2015 – Jan 2018 (2 years 6 months) | Bengaluru, India
Led Java/J2EE delivery teams from requirements to production support, brought in Agile delivery, and configured application servers, databases and cloud servers on AWS and SIFY.
IT Analyst, Tata Consultancy Services
Nov 2014 – Aug 2015 (10 months) | Chennai, India
Senior Software Engineer, contract, Teamware Solutions (Quantum Leap)
Sep 2013 – Nov 2014 (1 year 3 months) | Chennai, India
Senior Application Developer, Globus Medical India
Aug 2010 – Aug 2013 (3 years 1 month) | Chennai, India
Three years on Globus Medical's customised ERP portal: the first on the Globus account as a Software Engineer with Korcomptenz Consultancy Services, then in-house from August 2011 as Senior Application Developer. Built enhancements to the portal, travelled to Belgium and Germany to demonstrate it to users and implement it on site, and configured the WebLogic Server and Oracle Database behind it.
Software Developer, Netizen Technologies
Apr 2009 – May 2010 (1 year 2 months) | Chennai, India
Programmer, Goldmine Infotech
Oct 2004 – Mar 2006 (1 year 6 months) | Madurai, India
Selected products and projects
- IELTS Evaluator: AI band scores for IELTS writing and speaking, live as a web app with paid plans. (ieltseval.rajutechie.com)
- TEF/TCF Evaluator: AI feedback for the French TEF and TCF exams, mapped to CEFR levels A1 to C2. Live. (teftcfeval.rajutechie.com)
- ATS Résumé Validator: Real-time résumé scoring against a job description, with country-specific rewrites.
- Image Intelligence Studio: One studio for image forensics, OCR, background removal and metadata scrubbing.
- MacConnect Pro: Native macOS app for moving files between a Mac and Android or iPhone over USB.
- DocScanner Pro: A Flutter document scanner that keeps image processing off the UI thread.
Architecture case studies for all 22 projects: rajutechie.com/#projects
Education
Master of Computer Applications, Gandhigram Rural Institute, 2006 – 2009
B.Sc. Computer Science, Sree Sevugan Annamalai College, Devakottai, 2000 – 2003
Certifications and languages
Six Sigma Green Belt; Verified International Academic Qualifications
Languages: Tamil, English