I am an accomplished Senior Software Engineer with over ten years of experience in designing scalable microservices and optimizing CI/CD pipelines. I have a proven track record of enhancing team productivity and driving technical innovation through collaborative and mentoring roles. My passion lies in leveraging my expertise in Python and Java to create high-quality software solutions that make a difference.

Johnny Ha

I am an accomplished Senior Software Engineer with over ten years of experience in designing scalable microservices and optimizing CI/CD pipelines. I have a proven track record of enhancing team productivity and driving technical innovation through collaborative and mentoring roles. My passion lies in leveraging my expertise in Python and Java to create high-quality software solutions that make a difference.

Available to hire

I am an accomplished Senior Software Engineer with over ten years of experience in designing scalable microservices and optimizing CI/CD pipelines. I have a proven track record of enhancing team productivity and driving technical innovation through collaborative and mentoring roles. My passion lies in leveraging my expertise in Python and Java to create high-quality software solutions that make a difference.

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Experience Level

Expert
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Expert
Expert
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Expert
Expert
Expert
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Expert
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Expert
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Language

English
Fluent

Work Experience

Senior Software Engineer at Uber
April 1, 2024 - July 1, 2025
Led end-to-end development lifecycle for critical projects, reducing time-to-market by 35% while maintaining high system reliability. Developed RESTful microservices architecture, optimized CI/CD pipelines, and mentored junior engineers.
Full-Stack Software Engineer & Co-Founder at E-Commerce Business
December 1, 2020 - January 1, 2023
Architected Python microservices, designed cloud architecture using AWS, and implemented Agile methodologies to improve feature delivery and stakeholder satisfaction.
Senior Web & Mobile Full-Stack Engineer at AT&T
June 1, 2018 - December 1, 2020
Architected microservices, developed test automation frameworks, and collaborated with product teams to optimize performance across major releases.
Full-Stack Developer at T-Mobile
July 1, 2016 - June 1, 2018
Architected microservices and designed RESTful APIs, leading agile development and implementing automated testing strategies to reduce production bugs.

Education

B.S. in Computer Science at California State University, Los Angeles
August 1, 2012 - August 1, 2016

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet
    paper Shopify ERP Integration Platform

    • Architected RESTful APIs using Python and microservices, implementing SDLC best practices that reduced response time by 65% while supporting 3x more concurrent users.
    • Designed AWS infrastructure with Docker and Kubernetes, collaborating with DevOps to achieve 99.9% uptime and 90% reduction in data sync failures.
    • Led 6-developer team using Agile methodologies, established code review processes, and implemented MongoDB/PostgreSQL databases, improving efficiency by 40%.
    • Developed comprehensive testing strategies and CI/CD pipelines, increasing test coverage to 95% and reducing production bugs by 78% and deployment time by 70%.
    • Documented development processes with product teams, reducing onboarding time by 40% and mentoring 4 junior developers on Python frameworks and debugging techniques.

    paper Lease Data Migration & Validation Framework

    • Designed Python/SQL migration pipeline with SDLC best practices, implementing 50+ validation rules that achieved 99.9% data accuracy while reducing deployment time by 40%.
    • Collaborated with stakeholders to architect RESTful APIs and optimize PostgreSQL databases, resolving complex integration challenges between legacy systems and modern SaaS platforms.
    • Led agile team of 5 developers using Scrum methodology, reducing sprint planning by 30% and improving on-time feature delivery from 70% to 95%.
    • Debugged and optimized microservices using Docker containers and Java components, solving scalability bottlenecks that improved system throughput by 60%.
    • Implemented CI/CD pipeline with comprehensive testing strategies, increasing test coverage from 75% to 92% while reducing production bugs by 65%.

    paper AI Workflow Automation Toolkit

    • Architected cloud-native microservices using Python and AWS Lambda, implementing Agile methodologies that reduced processing time by 75% while maintaining 99.9% uptime.
    • Led cross-functional team implementing CI/CD pipelines with Git, collaborating on code reviews that reduced deployment time by 40% and enhanced software quality.
    • Designed modular software architecture integrating SQL/NoSQL databases, reducing technical debt by 40% while improving data processing efficiency by 65%.
    • Implemented comprehensive test automation framework achieving 95% code coverage, reducing critical bugs by 80% throughout the software development lifecycle.
    • Independently documented system architecture and mentored developers on Java/C++ integration, improving team knowledge sharing and reducing onboarding time by 60%.

    paper Full-Stack Mobility Operations Platform

    • Architected microservices using TypeScript, React, Python and Java that reduced API response times by 40%, maintaining 99.9% uptime across critical mobility operations.
    • Implemented CI/CD pipelines with Jenkins and Docker, reducing deployment time by 60% while increasing automated test coverage to 98%.
    • Designed and documented comprehensive API specifications, reducing cross-team integration issues by 40% while accelerating development across four product teams.
    • Led Agile team of 6 engineers to redesign RESTful APIs and optimize PostgreSQL queries, solving performance bottlenecks and increasing system throughput by 25%.
    • Debugged complex production issues using cloud monitoring tools, reducing critical incidents by 35% and enhancing system stability throughout the SDLC.