John Lawrence Jacko

Full Stack Java Developer with 3+ years of experience delivering scalable enterprise software solutions across e-commerce, retail, and data-driven systems. Skilled in Java / Spring Boot microservices, React.js, Angular, and Azure Cloud deployment pipelines.

Hello There!

I’m John Lawrence Jacko, a results-driven Full Stack Java Developer with over 3 yearsof professional experience delivering scalable enterprise software solutions across e-commerce, retail, and data-driven systems. Skilled in Java / Spring Boot microservices, React.js, Angular, and Azure Cloud deployment pipelines.

Available for Freelancing & Full-Time Opportunities

Download CV

3+ years of experience in full Stack development ||

|| Expert in Java, Spring Boot, Hibernate & Microservices ||

|| Hands-on with Kafka, RabbitMQ & event-driven systems ||

Cloud deployments on AWS & Azure

Strong expertise in PostgreSQL, Oracle & MongoDB

Services

What I Offer

💻 Full-Stack Development

I design and develop complete, scalable web applications from concept to deployment — combining modern technologies.

🚀 Cloud & DevOps

Deploying applications on AWS & Azure with Docker, Kubernetes, Jenkins pipelines, and CI/CD automation for faster delivery.

🔄 API & Messaging Systems

Building REST APIs, implementing OAuth2 & JWT security, and integrating event-driven workflows with Kafka, JMS, and RabbitMQ.

My Resume

A snapshot of my professional journey — showcasing my experience, education, and growth as a Full-Stack Developer.

💼Experience

Feb 2024 – Present

Independent Contributor

Data Annotation Tech | Remote

Experienced in backend authentication, frontend testing, and AI-driven development across modern full-stack environments.

Implemented JWT auth in Node.js and Spring Boot.
Converted Python tests to JUnit for validation consistency.
Tested React and Angular apps for UI quality and accessibility.
Reviewed SQL queries for MySQL, SQL Server, and Oracle.
Built an AI-based Image Cropper for React and Angular libraries.
Environment: Java, Spring Boot, Hibernate, React, Angular, HTML5, CSS3, JavaScript, Junit, SQL, Node.js, Express.js, TypeScript, Python, Azure (Storage Blobs, Key Vault, Functions)

Mar 2021 – Apr 2023

L2 Software Developer

Best Buy | Richfield, MN | Remote

Delivered scalable Spring Boot microservices and optimized Java 11 → 17 migration to enhance performance, reliability, and DevOps automation across enterprise systems.

Developed non-blocking REST APIs using Spring WebFlux for high-traffic apps.
Integrated Kafka and Redis for asynchronous messaging and caching.
Automated CI/CD with Jenkins, Docker, and Openshift.
Monitored systems using Kibana, Grafana, and Splunk.
Maintained code quality via SonarQube and security audits with Checkmarx.
Environment: Java 11/17, Spring Boot, WebFlux, Kafka, Redis, REST API, Jenkins, Docker, AWS EC2, Gradle, Git, SonarQube, Checkmarx, Kibana, Grafana, Splunk, JUnit, Mockito, Jacoco, Maven, Agile Scrum

🎓Education

Aug 2016 – May 2018

Master of Science in Computer Science

West Virginia University | 3.9 GPA

Focused on Software Engineering, Data Structures, and Distributed Systems. Developed academic projects involving machine learning and system optimization.

Aug 2012 – May 2016

Bachelor of Arts in Biology (Computer Science Minor)

West Virginia University | 3.4 GPA

Gained strong foundations in computational biology and programming fundamentals. Applied interdisciplinary knowledge to data analysis and scientific modeling.

Certifications

Professional certifications that demonstrate my expertise and commitment to continuous learning.

🏆

Microsoft Certified: Azure Fundamentals

July 2021

Basic knowledge of Azure services and cloud concepts.

🎓

Microsoft Certified: Azure Developer Associate

August 2021

Skilled in building and deploying apps on Azure.

🎖️

Microsoft Certified: Azure Solutions Architect

November 2021

Designs secure and scalable Azure cloud solutions.

🎯

AWS Certified Cloud Practitioner

September 2023

Understands AWS cloud architecture and core services.

🚀

Oracle Certified Java SE 8 Programmer

October 2018

Proficient in core Java programming and OOP principles.

🥇

CompTIA A+ Certified

September 2024

Hands-on skills in IT support and system troubleshooting.

Works & Projects

Explore my professional projects across Web, Mobile, and Automation domains. These highlight my expertise in building secure, scalable, and enterprise-grade systems using technologies like Java, Python, C++, PHP, Kotlin, Spring Boot, React.js, Angular, Microservices, Kafka, Docker, Kubernetes, AWS, and Azure.

Frontend Development

🌿 Frontend Web Apps Ecosystem

Designed a unified frontend ecosystem using Angular and React. Created reusable component libraries hosted on Azure DevOps and integrated them with Spring Cloud Gateway and Azure Front Door for consistent user access and performance.

Tech: Angular, React, TypeScript, Vite, Thymeleaf, HTML, CSS, Azure (App Service, DevOps, Front Door).

Backend Development

🛜 Network of Backend Web Apps

Built multiple Spring Boot microservices hosted on Azure App Service with enterprise-grade security using Spring Security, JWT, and MFA. Integrated Azure Key Vault, Virtual Networks, and CosmosDB for secure and scalable architecture.

Tech: Java 17/21, Spring Boot, Hibernate, REST API, MySQL, Azure (App Service, Key Vault, Functions, DevOps, CosmosDB, Front Door).

Character Traits

Who I Am

Analytical thinker with strong problem-solving skills, experienced in designing scalable enterprise solutions.

Analytical

Problem Solver

Detail-oriented backend engineer with a focus on accuracy, reliability, and performance optimization.

Detail-Oriented

Quality Driven

Collaborative team player, thriving in Agile/Scrum environments and cross-functional projects.

Collaborative

Team Oriented

Adaptable and continuously learning, quick to embrace new tools, technologies, and domains.

Adaptable

Continuous Learner