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I am a Senior Java Developer with over 12 years of experience building scalable and high-performance applications. My expertise spans Java 8 through 17, Spring Boot, microservices, RESTful and GraphQL APIs, Kafka, and cloud solutions on AWS and GCP. I'm passionate about mentoring teams, clean code practices, and continuous learning in fast-paced tech environments. Throughout my career, I have delivered mission-critical systems in fintech, e-commerce, healthcare, and enterprise cloud domains. I have a strong background in databases such as PostgreSQL, MongoDB, DynamoDB, and compliance standards like HIPAA. I also embrace DevOps, domain-driven design, and Agile methodologies to drive innovation and efficiency.…I am a Senior Java Developer with over 12 years of experience building scalable and high-performance applications. My expertise spans Java 8 through 17, Spring Boot, microservices, RESTful and GraphQL APIs, Kafka, and cloud solutions on AWS and GCP. I'm passionate about mentoring teams, clean code practices, and continuous learning in fast-paced tech environments. Throughout my career, I have delivered mission-critical systems in fintech, e-commerce, healthcare, and enterprise cloud domains. I have a strong background in databases such as PostgreSQL, MongoDB, DynamoDB, and compliance standards like HIPAA. I also embrace DevOps, domain-driven design, and Agile methodologies to drive innovation and efficiency.

Kamal Saeed

Developer, Full Stack Developer, Programmer, +4

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I am a Senior Java Developer with over 12 years of experience building scalable and high-performance applications. My expertise spans Java 8 through 17, Spring Boot, microservices, RESTful and GraphQL APIs, Kafka, and cloud solutions on AWS and GCP. I'm passionate about mentoring teams, clean code practices, and continuous learning in fast-paced tech environments. Throughout my career, I have delivered mission-critical systems in fintech, e-commerce, healthcare, and enterprise cloud domains. I have a strong background in databases such as PostgreSQL, MongoDB, DynamoDB, and compliance standards like HIPAA. I also embrace DevOps, domain-driven design, and Agile methodologies to drive innovation and efficiency.…I am a Senior Java Developer with over 12 years of experience building scalable and high-performance applications. My expertise spans Java 8 through 17, Spring Boot, microservices, RESTful and GraphQL APIs, Kafka, and cloud solutions on AWS and GCP. I'm passionate about mentoring teams, clean code practices, and continuous learning in fast-paced tech environments. Throughout my career, I have delivered mission-critical systems in fintech, e-commerce, healthcare, and enterprise cloud domains. I have a strong background in databases such as PostgreSQL, MongoDB, DynamoDB, and compliance standards like HIPAA. I also embrace DevOps, domain-driven design, and Agile methodologies to drive innovation and efficiency.

Available to hire

I am a Senior Java Developer with over 12 years of experience building scalable and high-performance applications. My expertise spans Java 8 through 17, Spring Boot, microservices, RESTful and GraphQL APIs, Kafka, and cloud solutions on AWS and GCP. I’m passionate about mentoring teams, clean code practices, and continuous learning in fast-paced tech environments.

Throughout my career, I have delivered mission-critical systems in fintech, e-commerce, healthcare, and enterprise cloud domains. I have a strong background in databases such as PostgreSQL, MongoDB, DynamoDB, and compliance standards like HIPAA. I also embrace DevOps, domain-driven design, and Agile methodologies to drive innovation and efficiency.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Lead Java Engineer at Snowflake Inc., Cloudbees

January 1, 2021 - Present

Architected and deployed high-throughput Java 17 microservices using Spring Boot, Kafka, Docker, and Kubernetes, achieving under 50ms latency and handling over 120K messages per second with support for 40+ enterprise clients. Reduced infrastructure costs by 28% through auto-scaling and load balancing. Integrated OpenTelemetry for distributed tracing, improving observability and reducing mean time to resolution by 55%. Led and mentored a team of 6 engineers, introducing reusable DDD-compliant service libraries and reducing boilerplate code by 25%. Enhanced test coverage from 62% to 91% by implementing advanced integration testing pipelines.

Senior Java Developer at CircleCI

December 31, 2020 - August 6, 2025

Developed scalable microservices for Shopify’s e-commerce platform using Java 11, Spring Boot, and AWS DynamoDB, supporting a 55% surge in online transactions during COVID-19. Built real-time inventory and pricing APIs with Apache Kafka and Redis, improving merchant data synchronization accuracy by 28%. Optimized PostgreSQL queries to reduce latency by 22%. Deployed containerized services using Kubernetes and GitHub Actions, enabling a 4x faster release cycle. Mentored developers on cloud-native patterns and conducted code reviews to ensure quality.

Java Developer at Heroku

January 31, 2017 - August 6, 2025

Engineered secure payment processing APIs handling over 10 million transactions daily with 99.99% uptime using Java 11, Spring Boot, and Hibernate. Refactored legacy systems into 15+ microservices with Spring Cloud and Kafka, reducing deployment times by 40%. Designed a fraud detection system with Redis and AWS Lambda, reducing fraudulent transactions by 25%. Optimized CI/CD pipelines using Terraform and Jenkins, improving build efficiency by 35%. Led JVM performance tuning, saving $150K annually through optimized cloud resource usage.

Java Backend Developer at Upflow Solutions

May 31, 2014 - August 6, 2025

Built secure backend services for Electronic Health Records (EHR) systems using Java 8, Spring MVC, and PostgreSQL, ensuring full HIPAA compliance. Developed RESTful APIs for patient data integration, supporting over 80,000 daily requests with high reliability. Optimized database queries and indexing, improving data retrieval speed by 20%. Implemented CI/CD pipelines with Maven and Git, reducing release cycles from 6 to 2 weeks. Introduced AWS S3 storage for enhanced scalability of clinical applications.

Lead Java Engineer at Snowflake Inc., Cloudbees

January 1, 2021 - Present

Architected and deployed high-throughput Java 17 microservices using Spring Boot, Kafka, Docker, and Kubernetes, achieving less than 50ms latency and handling over 120K messages per second. Supported 40+ enterprise clients while reducing infrastructure costs by 28% through auto-scaling and load balancing. Integrated OpenTelemetry with Spring Cloud for full distributed tracing, improving observability and reducing incident resolution times by 55%. Led and mentored a team of 6 engineers, introduced a reusable Domain-Driven Design service library, and improved code quality by reducing boilerplate. Enhanced test coverage from 62% to 91% with advanced integration testing using JUnit 5 and Testcontainers. Utilized Spring Cloud Gateway, Resilience4j, and MapStruct to enhance microservice communication and fault tolerance.

Senior Java Developer at CircleCI

December 31, 2020 - August 6, 2025

Developed scalable microservices for Shopify’s e-commerce platform using Java 11, Spring Boot, and AWS DynamoDB, supporting a 55% surge in online store transactions during COVID-19. Built real-time inventory and pricing APIs with Apache Kafka and Redis, improving merchant data synchronization accuracy by 28%. Optimized Aurora PostgreSQL queries, reducing checkout API latency by 22% for high-traffic endpoints. Deployed containerized services using Kubernetes and GitHub Actions, enabling 4x faster release cycles. Mentored developers on cloud-native best practices and conducted code reviews to maintain high quality.

Java Developer at Heroku

January 31, 2017 - August 6, 2025

Engineered secure payment processing APIs using Java 11, Spring Boot, and Hibernate, handling over 10 million transactions daily with 99.99% uptime. Refactored legacy systems into 15+ microservices with Spring Cloud and Kafka, reducing deployment times by 40% and improving scalability. Designed a fraud detection system with Redis and AWS Lambda, reducing fraudulent transactions by 25%. Optimized CI/CD pipelines using Terraform and Jenkins, improving build efficiency by 35%. Led JVM performance tuning efforts, saving $150K annually by optimizing cloud resource usage.

Java Backend Developer at Upflow Solutions

May 31, 2014 - August 6, 2025

Built secure backend services for Electronic Health Records (EHR) systems using Java 8, Spring MVC, and PostgreSQL, ensuring full HIPAA compliance. Developed RESTful APIs for patient data integration, supporting over 80K daily requests with high reliability. Optimized database queries and indexing, resulting in a 20% improvement in data retrieval speed. Implemented CI/CD pipelines with Maven and Git, reducing release cycles from 6 weeks to 2 weeks. Introduced AWS S3 for secure, scalable clinical data storage.

Lead Java Engineer at Snowflake Inc., Cloudbees

January 1, 2021 - Present

Architected and deployed high-throughput Java 17 microservices using Spring Boot, Kafka, Docker, and Kubernetes achieving <50ms latency and handling 120K+ messages/sec supporting 40+ enterprise clients. Improved platform observability using OpenTelemetry and reduced incident resolution time by 55%. Led a team of 6 engineers, introduced a reusable DDD-compliant service library, and increased test coverage from 62% to 91%. Utilized Spring Cloud Gateway, Resilience4j, and MapStruct to enhance fault tolerance and DTO mapping.

Senior Java Developer at CircleCI

December 31, 2020 - August 18, 2025

Developed scalable microservices for Shopify’s e-commerce platform using Java 11, Spring Boot, and AWS DynamoDB, supporting a 55% surge in online transactions. Built real-time inventory and pricing APIs with Kafka and Redis, improving merchant data sync accuracy by 28%. Optimized Aurora PostgreSQL queries reducing checkout API latency by 22%. Deployed containerized services with Kubernetes and GitHub Actions enabling 4x faster release cycles. Mentored developers and conducted code reviews.

Java Developer at Heroku

January 31, 2017 - August 18, 2025

Engineered secure payment processing APIs using Java 11, Spring Boot, and Hibernate handling 10M+ transactions daily with 99.99% uptime. Refactored legacy systems into 15+ microservices using Spring Cloud and Kafka, reducing deployment time by 40%. Designed fraud detection system with Redis and AWS Lambda reducing fraudulent transactions by 25%. Optimized CI/CD pipelines with Terraform and Jenkins improving build efficiency by 35%. Led JVM tuning saving $150K annually through resource optimization.

Java Backend Developer at Upflow Solutions

May 31, 2014 - August 18, 2025

Built secure backend services for EHR systems using Java 8, Spring MVC, and PostgreSQL ensuring 100% HIPAA compliance. Developed RESTful APIs for patient data integration supporting 80K+ daily requests. Optimized database queries and indexing resulting in 20% faster data retrieval. Implemented CI/CD pipelines with Maven and Git reducing release cycles from 6 weeks to 2 weeks. Introduced AWS S3 for secure scalable data storage for clinical applications.