Duc B.

Hi! I'm a senior Golang and Java backend engineer and AWS Cloud Architect helping SaaS companies build, modernize, and scale production systems on Amazon Web Services (AWS). I have 8+ years of backend engineering experience with Java, Spring Boot, and Golang, and 5+ years of AWS cloud engineering experience. CERTIFICATIONS * AWS Certified Solutions Architect - Associate * AWS Certified DevOps Engineer - Professional * AWS Certified Solutions Architect - Professional My main advantage is that I write the backend code and build the AWS infrastructure it runs on. You do not need to hire separate Java, Golang, cloud, and DevOps engineers to ship one feature or fix one production problem. WHAT I CAN HELP YOU WITH 1. GOLANG BACKEND AND MICROSERVICES * High-performance Golang services, REST APIs, and GraphQL APIs * Microservice architecture, service decomposition, and API design * Event-driven systems with Apache Kafka * Golang workloads on AWS Lambda, Amazon ECS, and Kubernetes 2. JAVA AND SPRING BOOT DEVELOPMENT * Java and Spring Boot microservices and REST APIs * Hibernate/JPA data access and query performance tuning * Legacy Java modernization and migration to containers on AWS * Spring Boot deployments on Docker, Amazon ECS, and Amazon EKS 3. AWS CLOUD ARCHITECTURE AND SERVERLESS * AWS architecture design and reviews for SaaS platforms * Serverless applications with AWS Lambda, API Gateway, SQS, and SNS * Containers with Docker, Amazon ECS, and Amazon EKS (Kubernetes) * Multi-account setup with AWS Organizations, Control Tower, and IAM Identity Center * High availability, backup, disaster recovery, RTO, and RPO 4. DATABASES, CACHING, AND DATA * PostgreSQL and Amazon RDS/Aurora design, tuning, and migrations * NoSQL databases: Amazon DynamoDB and MongoDB data modeling * Redis/ElastiCache for caching, sessions, and rate limiting * Elasticsearch for search and centralized logging 5. DEVOPS, INFRASTRUCTURE AS CODE, AND CI/CD * Terraform, AWS CloudFormation, and AWS CDK * Reusable modules, Terraform import, state management, and drift remediation * CI/CD pipelines with GitHub Actions, CodePipeline, CodeBuild, and CodeDeploy * Zero-downtime deployments with blue/green and rolling strategies 6. AWS SECURITY, COST OPTIMIZATION, AND COMPLIANCE * IAM least privilege, VPC design, private networking, and VPC endpoints * Security Hub, GuardDuty, AWS Config, CloudTrail, KMS, and secrets management * Technical remediation for SOC 2 and ISO 27001 * Right-sizing EC2, ECS, Lambda, and RDS, Savings Plans, and NAT Gateway and data transfer cost reduction I provide practical implementation, not only an audit report. 7. FRACTIONAL BACKEND AND AWS ENGINEERING I can support SaaS teams for 10–20 hours per week with: * Golang and Java feature development and code reviews * AWS architecture and production change reviews * Monitoring, incident investigation, and performance troubleshooting * Cloud and database migrations WHY WORK WITH ME I work across the complete production system: * Backend: Java, Spring Boot, Hibernate, Golang, microservices, REST API, GraphQL * Data: PostgreSQL, Amazon RDS, Redis, DynamoDB, MongoDB, Apache Kafka * Cloud: AWS Lambda, Amazon ECS, Kubernetes, Docker, VPC, IAM * Delivery: Terraform, CloudFormation, CI/CD, monitoring, and production support You work directly with a senior engineer who can design the solution, write the code, deploy it on AWS, and support it in production.