Nguyen Kien Senior Full Stack Engineer
SUMMARY
With over nine years of hands-on experience, I excel as a Senior Full Stack Developer skilled in JavaScript,
Java, and Go. I have a proven track record in designing microservice architectures, building highperformance APIs, and creating comprehensive React-based user interfaces. My expertise also includes
cloud-based deployments, complex system integrations, and agile workflows, with successful projects
spanning finance, healthcare, and e-commerce.
WORK EXPERIENCE
Senior Full-Stack Engineer
Room-Res
Jun 2022 – March 2025
Australia
Designed and supported a financial SaaS application built with Spring Boot (Java) and FastAPI
(Python), prioritizing secure, modular, and high-performance architecture.
Created and deployed Go-based microservices for real-time analytics and event-driven workflows,
dramatically increasing data pipeline speed and stability.
Connected external financial APIs and developed secure authentication flows using OAuth2 and
JWT, ensuring protected and seamless access to client data.
Spearheaded backend performance improvements—implementing Redis caching, optimizing
database queries, and decoupling services—to achieve a 35% reduction in system latency.
Established CI/CD workflows with Docker, Jenkins, and GitHub Actions for automated testing,
builds, and deployments on AWS (ECS, RDS, S3).
Partnered with product owners and frontend developers to match feature releases with user
requirements, contributing to a 25% increase in user retention.
Full-Stack Engineer
Cerebrum
Jan 2020 – May 2022
United States
Developed and maintained customer-facing platform APIs using Go and Java within the healthcare
and logistics domains, ensuring secure transaction handling and streamlined user workflows.
Created scalable, fault-tolerant data processing components and background worker services in
Python leveraging Celery and RabbitMQ.
Implemented intuitive, responsive front-end interfaces in React, integrating them with RESTful
and gRPC APIs to enhance user experience and navigation.
Architected a microservices ecosystem with Docker and Kubernetes, enabling modular services to
scale independently and simplifying deployment processes.
Performed thorough unit and integration testing with JUnit, PyTest, and REST-assured to
guarantee system stability and code maintainability.
Established real-time monitoring and logging capabilities using Prometheus, Grafana, and the ELK
stack, delivering actionable insights into application performance and usage.
Actively participated in sprint planning, effort estimation, and cross-functional collaboration as
part of an Agile SCRUM team.
Full-Stack Engineer
Awebstar Technologies
Oct 2017 – Dec 2020
Singapore
Spearheaded the creation of e-commerce and enterprise portals with a full-stack setup, utilizing
Spring-based Java and Python on the server side alongside React for the client interface.
Developed Go-based REST APIs and background services for reporting and high-traffic
operations, achieving a 40% decrease in response times during peak usage.
Connected external systems such as Stripe and PayPal payment gateways, shipping services, and
CRM platforms to automate end-to-end business workflows.
Managed and optimized both relational databases (PostgreSQL, MySQL) and NoSQL stores
(MongoDB), ensuring data consistency and peak performance.
Established solid DevOps workflows by containerizing applications with Docker and deploying
them to AWS services like EC2, S3, and Route 53.
Coordinated project planning and progress tracking using Jira and Confluence, enhancing
visibility and collaboration with stakeholders.
Engaged in Agile ceremonies, authored technical documentation, and collaborated with QA teams
to strengthen automated testing coverage.
SKILLS
Programming Languages: HTML, Go, C#, CSS, JavaScript, Java, Python, Typescript
Frameworks and Libraries: Spring Boot, .NET, Node.js, FastAPI, Gin, Nest.js, Celery,
RabbitMQ, React, Vue, Next.js, Golang
Database Management: PostgreSQL, MySQL, MongoDB, Redis
Version Control: Git, GitHub, GitLab
CI/CD Pipeline: Docker, Jenkins, GitHub Actions, Octopus
Agile Methodologies: Jira, Trello, Slack, Notion
Testing Tools: Selenium, Cypress, Jest
EDUCATION
Bachelor’s Degree in Computer Science
FPT University, Hanoi, Vietnam
2013 – 2017
