Manjush Bhuvanadas
Limerick,Limerick
Summary
AWS Certified Solutions Architect with 16 years of engineering experience delivering enterprise-grade applications, cloud-native microservices, and scalable data platforms. Strong expertise in Java, Python, Spring Boot, Quarkus, PySpark, SQL, Kafka and AWS, with hands-on experience building ETL/data pipelines, distributed systems and event-driven architectures. Experienced technical leader in microservices architecture, data engineering, performance optimization, cloud-native solutions, code reviews and mentoring, with a strong focus on reliability, scalability and engineering best practices.
Overview
1
1
Certification
16
16
years of professional experience
Work History
Technical Lead
Citi
Dublin, Ireland
10.2025 - Current
- Design and optimize large-scale batch data pipelines using Python, Java, PySpark and SQL.
- Build scalable data workflows using AWS S3, Iceberg/Parquet, Trino, Impala and Pinot.
- Improved Spark pipeline performance from 2+ hours to ~20–26 minutes through SQL and resource optimization.
- Implement data-quality, readiness and validation controls and resolve complex production data issues.
- Provide technical leadership, design/code reviews and mentoring, while driving resilient and scalable data-engineering solutions.
Technical Lead
Carelon Global Solutions Ireland
LIMERICK, Ireland
04.2024 - 10.2025
- Provided technical direction and mentoring, conducting regular code reviews, KT sessions, and coaching on modern Java and Quarkus best practices.
- Partnered with product owners and stakeholders to align priorities, balance technical debt with business goals, and deliver scalable solutions.
- Drove resolution of critical database connection issues, optimizing connection pooling and preventing leaks, which significantly improved system stability and performance.
- Designed and implemented a centralized retry mechanism for inter-service communication, boosting fault tolerance and resilience.
- Led the migration of core microservices from Java 11 to Java 21 and Quarkus 3.15.2, ensuring smooth adoption through KT sessions and hands-on support.
- Directed delivery of high-impact features including Autoenrolment failure handling and Delivery method enhancements, ensuring system reliability and graceful degradation.
- Championed team collaboration and continuous improvement, fostering a culture of ownership, innovation, and technical excellence
Senior Software Engineer
Clover / Fiserv
Neenagh, Ireland
07.2022 - 03.2024
- Acted as a technical lead within the team, guiding peers on best practices, conducting code reviews, and mentoring junior engineers.
- Designed and developed the Cellular Billing system, integrating Agreement and Bookkeeper microservices to automate settlement event processing.
- Delivered key features including app charge processing and merchant price plan enforcement, ensuring accuracy and compliance in billing operations.
- Partnered with cross-functional teams to deliver scalable and resilient billing solutions deployed on Kubernetes and Google Cloud.
- Contributed to modernization initiatives by enhancing legacy billing systems while driving adoption of Spring Boot, Kafka, and cloud-native practices.
Senior Java Developer
CSG / Tango Telecom
Limerick, Ireland
11.2016 - 07.2022
- Contributed extensively to the Subscriber Profile & Charging Manager platform, delivering numerous features that improved charging, and policy management.
- Delivered multi-tenant solutions, supporting multiple clients on a shared infrastructure with strong isolation and scalability.
- Contributed to core features such as charging flows, while also maintaining and enhancing legacy billing systems.
- Built high-performance services using Spring Boot, WebFlux, Batch, and JPA, deployed on Kubernetes with Helm for CI/CD automation.
Senior Java Developer
Scannell Solutions Ltd/ Ideagen
Cork, Ireland
03.2014 - 10.2016
- Enhanced EnviroManager, a QEHS compliance platform, improving scheduling and reporting features.
- Led UI migration to ESB, modernizing integrations and boosting system scalability.
Java Developer
SnapRewards
Cork, Ireland
11.2013 - 02.2014
- Developed and deployed a cloud-based rewards application on AWS (Elastic Beanstalk, EC2, S3, Auto Scaling, ELB).
- Built backend services with Java + Spring, integrated with MongoDB, and delivered responsive UI with modern web technologies.
Java Developer
Kott Software Pvt.Ltd
Kochi, India
05.2012 - 09.2013
- Contributed to a U.S. trade compliance system (EASE), handling export/import process automation and reporting.
- Migrated modules from Struts 1 → Struts 2 and developed reports using Dynamic Jasper.
Senior Java Developer
OSI Software Labs
Kochi, India
01.2012 - 05.2012
- Enhanced ERP modules using ADempiere, Jasper Reports, and MySQL for business process automation.
Java Developer
Spectrum Softtech Solutions Pvt. Ltd
Kochi, India
04.2011 - 01.2012
- Contributed to a healthcare EHR project, developing scheduling and consultation modules using Spring, Hibernate, and MySQL.
Java Developer
GINFO INTL
Kochi, India
10.2010 - 03.2011
- Involved in e -Tender Software for bidding
- Technologies: Spring, Hibernate, HTML, CSS
Education
Master of Science - Software Engineering
Annamalai University
IndiaCertificate In Artificial Intelligence -
University Of Limerick
Skills
Languages
Java, Python
Frameworks / Platforms
Spring Boot, Quarkus, Kogito
Spring Modules
Spring Data JPA, Spring Batch, Spring WebFlux, Spring Security
Persistence
Panache, Spring Data JPA
Big Data / Data Engineering
Apache Spark (PySpark), Iceberg, Trino, Starburst, Impala, Pinot, AWS Glue , EMR
Scheduling & Orchestration
Quartz Scheduler, Apache Airflow
Messaging
Kafka, RabbitMQ, Google Pub/Sub
Front-end
Angular, React, Bootstrap, jQuery, JavaScript, CSS, HTML
API / Docs
OpenAPI
Monitoring & Logging
Grafana, Kibana, Prometheus, Splunk
Databases
MySQL, PostgreSQL, MongoDB
DevOps / CI-CD
Kubernetes, Jenkins, Skaffold, JFrog Artifactory
Cloud Platforms
AWS, Google Cloud Platform (GCP)
Caching
Ehcache, Redis
Testing
Robot Framework
Tools
JIRA, Confluence, Git, Bitbucket, SonarQube
Links
- Linkedin : https://www.linkedin.com/in/manjush4u/
- Blog: https://manjush.com/
Certification
- AWS Certified Solutions Architect – Associate
Amazon Web Services
(August 2025 - August 2028)
Validation: ab88b288e999430588e19ff787bd70ca - Designing Event-Driven Architectures
AWS Training & Certification
(Completed August 2025) - Oracle Certified Professional, Java SE 6 Programmer
Achievements
- Runner-up in the Clover Hackathon, EMEA region, for 'Anomaly Detection in Billing'.
Timeline
Technical Lead
Citi
10.2025 - Current
Technical Lead
Carelon Global Solutions Ireland
04.2024 - 10.2025
Senior Software Engineer
Clover / Fiserv
07.2022 - 03.2024
Senior Java Developer
CSG / Tango Telecom
11.2016 - 07.2022
Senior Java Developer
Scannell Solutions Ltd/ Ideagen
03.2014 - 10.2016
Java Developer
SnapRewards
11.2013 - 02.2014
Java Developer
Kott Software Pvt.Ltd
05.2012 - 09.2013
Senior Java Developer
OSI Software Labs
01.2012 - 05.2012
Java Developer
Spectrum Softtech Solutions Pvt. Ltd
04.2011 - 01.2012
Java Developer
GINFO INTL
10.2010 - 03.2011
Certificate In Artificial Intelligence -
University Of Limerick
Master of Science - Software Engineering
Annamalai University