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Marwynn Joynes

Senior Full Stack Engineer
Technical Lead

    • LinkedIn
    • resume.marwynn.net
    • GitHub

    Summary

    Senior full-stack engineer and technical lead with a decade of design experience before moving into engineering. Led partner integrations and compliance-sensitive systems, including healthcare data exchange and PHI/PII sanitization pipelines. Architected a fully automated CI/CD pipeline in GitHub Actions that cut CI runtime and cost by more than 30% by migrating from GitHub-hosted runners to third-party runners. Mentored engineers across the stack. Increasingly works with AI-assisted engineering tooling to ship faster without sacrificing quality.

    When a section has … at the end of it, that indicates there is more information available at resume.marwynn.net

    Experience

    Senior Backend Engineer & Technical Lead

    Alma

    July 2022 to July 2026 — United States (Remote)

    Technical lead and architect driving CI/CD improvements, a client-data protection process, and growth-enabling partner integrations. Improved developer experience and mentored engineers through career growth and challenges.

    • Cut costs by improving CI/CD workflows and performance by more than 30%.
    • Built a sanitized-data pipeline that virtually eliminated HIPAA/PII exposure in lower environments.
    • Led architecture and delivery for 3+ insurance partner integrations, enabling secure healthcare data exchange and unlocking new revenue channels.
    • Improved developer experience, boosting confidence and cutting support requests.
    • Mentored engineers on career growth and problem-solving.
    • Promoted from Backend Engineer III (2022) to Senior Backend Engineer and Technical Lead (2023).

    Senior Developer & Team Captain

    14Four

    December 2020 to July 2022 — Spokane, Washington

    Built a self-service backend and infra site-creation framework that cut new site turnaround from two days to two hours, and developed high-traffic marketing campaign sites on AWS infrastructure. Served as a technical mentor and advisor for both frontend and backend developers.

    • Built a self-service full stack framework that cut new-site initialization from 2 days to 2 hours.
    • Built high-traffic marketing campaign sites on AWS.
    • Technical mentor and advisor for both frontend and backend developers.

    Creative / Full Stack Developer

    Uxiliary

    October 2018 to December 2020 — Spokane, Washington

    Adapted on the fly to inherited projects across a variety of tech stacks, and integrated with various customer systems including custom inventory and internal APIs. Assisted with community building through meetups and competitions.

    • Picked up new stacks fast on inherited projects (Drupal, Rails, WordPress, custom PHP), reducing time-to-first-commit on inherited codebases from weeks to days.
    • Integrated with customer systems, including custom inventory and internal APIs.
    • Assisted with community building through meetups and competitions.

    Personal Projects

    Projects

    Insurance Partner Data Exchange API

    Alma

    Designed and built healthcare-standard APIs enabling secure data exchange with third-party insurance partners.

    Built healthcare-standard REST APIs for secure data exchange with 3+ insurance partners, with more in flight. Led discovery, validation rules, and testing in direct partnership with their team.

    REST APIs, Healthcare Data Standards

    • Built a secure API per partner-specified Healthcare Data Standards rules.
    • Implemented verbose validation and error rules.
    • Partnered with the insurer on discovery, planning, implementation, and testing.

    Sanitized Data Pipeline

    Alma

    Data sanitization pipeline ensuring PHI/PII never leaked into lower environments or local development.

    Built a sanitized-data pipeline that virtually eliminated HIPAA/PII exposure in lower environments. Gave engineers a production-like database with referential integrity. Reduced local dev data load times from 8 hours to 30 minutes.

    Data Sanitization Tooling, ECS, EFS, S3 Transfer Acceleration

    • Used automated data sanitization tooling to generate sanitized data for lower environments and local development.
    • Eliminated PHI/PII exposure risks by ensuring sensitive data never left production.
    • Reduced local-development data load times from 8 hours to 30 minutes.
    • Built a compressed local-development backup system using ECS, EFS, and S3 Transfer Acceleration to work around size/performance limitations.

    Automated CI/CD Pipeline

    Alma

    Architected a fully automated CI/CD pipeline in GitHub.

    Architected a fully automated CI/CD pipeline in GitHub Actions with merge queues and required deploy checks. Planned the integration and E2E suites gating every merge.

    GitHub Actions, Merge Queues, Integration Testing, E2E Testing

    • Implemented GitHub merge queues and required deploy checks to keep main always releasable.
    • Planned integration and end-to-end test suites gating every merge.
    • Research and discovery assisted by AI to speed planning.

    Third-Party CI Runner Migration

    Alma

    Migrated CI workloads from GitHub-hosted runners to third-party CI runners for better reliability, faster run times, easier resource allocation, and lower costs.

    Migrated CI from GitHub-hosted to third-party runners for better reliability and easier scaling. Cut CI runtime and costs by more than 30%.

    GitHub Actions, GitHub API, CI/CD

    • Migrated GitHub Actions workflows from GitHub-hosted runners to third-party CI runners.
    • Tuned CI runner resource allocation for the most time- and cost-efficient runs.
    • AI assistance to audit CI/CD workflows for change needs.
    • Cut CI runtime and cost by more than 30%.

    Nike Super Bowl Halftime VR Experience

    14Four

    Serverless infrastructure supporting a large-scale, time-boxed live VR activation.

    Ran serverless AWS infrastructure for a live Super Bowl VR activation, scaling ahead of demand with an AWS SRE. Added multi-region fallbacks and monitoring to catch issues before they became outages.

    AWS, Serverless, CloudWatch

    • Managed serverless infrastructure, coordinating with an AWS SRE to scale ahead of demand.
    • Implemented multi-region fallbacks to protect against AWS regional incidents.
    • Built monitoring and alerting to surface developing issues before they became outages.

    Panda Express Chinese New Year Sweepstakes

    14Four

    Sweepstakes site for Panda Express's Chinese New Year campaign, built on serverless infra to absorb large traffic spikes.

    Built a serverless sweepstakes site on AWS Lambda and Aurora to absorb unpredictable traffic spikes. Delivered the GraphQL backend and co-built the Vue.js frontend.

    AWS Lambda, Serverless Aurora, GraphQL, Vue.js

    • Managed serverless infrastructure and a serverless database to handle unpredictable traffic spikes.
    • Built a backend GraphQL API.
    • Built the frontend Vue.js site in collaboration with a frontend developer.

    Uxiliary

    E-commerce site on AWS Amplify with AppSync GraphQL and Craft CMS, integrated with customer inventory management.

    Built an e-commerce site on AWS Amplify with AppSync GraphQL and Craft CMS, syncing data with the client's inventory API. Hardened authentication and migrated legacy users to better practices.

    AWS Amplify, AWS AppSync, GraphQL, Craft CMS

    • Integrated with client's custom internal inventory management API.
    • Hardened authentication and migrated legacy users to better practices.
    • Implemented data syncing to and from client's system.

    Uxiliary

    Load-balanced marketing site built on AWS infrastructure.

    Built a load-balanced marketing site on AWS ECS with a custom Craft CMS build. Partnered with a third-party infra team on CI/CD.

    AWS CodePipeline, AWS ECS, Craft CMS

    • Developed frontend of website to match client specs.
    • Worked with third-party infrastructure team to develop CI/CD processes.
    • Created custom Craft CMS implementation.

    Resume Site

    GitHub repository

    Personal

    Full CI/CD and 80%+ test coverage for a personal resume? Overkill, sure — but it showcases my skills. ;)

    Is it overkill to implement full CI/CD and 80%+ test coverage for a personal resume? Sure — it showcases my skills. Demonstrates CI/CD, testing depth, frontend breadth, and AI-assisted engineering (Claude Code).

    GitHub Actions, Vitest, Playwright, Gatsby, TypeScript

    • Designed and built a fully static site with Gatsby, React, and TypeScript.
    • Used AI to audit accessibility, write tests, generate boilerplate, and maintain documentation of historical context.
    • Implemented client-side encryption for contact information with AES-256-GCM.
    • Built a light/dark theme toggle with synchronized SSR to prevent flash-of-unstyled-content.
    • Engineered responsive design with print layouts optimized for ATS (Applicant Tracking Systems).
    • Set up CI/CD with GitHub Actions, merge queues, and automated testing (Vitest and Playwright).

    Education

    Web Design and Development B.S.

    Full Sail University

    2014 to 2017

    Valedictorian

    Skills

    Languages
    • Python
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    • SQL
    • HTML
    • Click for more info
    • PHP
    • Ruby
    Frameworks & Tools
    • Django
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    • Git
    • Express
    • Apollo GraphQL
    • Flask
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    • Ruby on Rails
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    AI Tools
    • Claude
    • Copilot
    • Gemini
    • Cursor
    Testing
    • Pytest
    • Jest
    • Playwright
    • Vitest
    Databases
    • MySQL
    • DynamoDB
    • Data Sanitization Tooling
    • PostgreSQL
    • SQLite
    Cloud & Infrastructure
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    • Docker
    • Terraform
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    You can find an always updated version of this resume at resume.marwynn.net

    Background pattern “Prism” by Michal, via Subtle Patterns.

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