Marcus T. Okafor

Profile

Full-stack engineer with 8 years building scalable web applications across fintech and SaaS domains, specializing in React, Node.js, and PostgreSQL. Delivered a payment-processing platform handling $2.4 M in daily transactions and cut average page load time by 61% across a 400 K-user product. Comfortable owning the full delivery cycle from architecture decisions to CI/CD pipeline configuration.

Work Experience

Senior Full-Stack DeveloperMar 2021 - Present

Vantex Financial Technologies, Austin, TX

Architected a React/Node.js loan-origination portal that reduced application processing time from 14 minutes to 3 minutes, increasing completed submissions by 38%.
Re-platformed a legacy PHP monolith to a microservices architecture on AWS, cutting infrastructure costs by $180 K annually and improving uptime from 99.1% to 99.97%.
Mentored a team of 4 mid-level engineers through bi-weekly code reviews and a custom onboarding curriculum, reducing PR rework cycles by 42%.

Full-Stack DeveloperJun 2018 - Feb 2021

Loopline SaaS, Remote

Built a real-time analytics dashboard using React, D3.js, and a GraphQL API that replaced 6 separate internal reporting tools and saved 11 hours of manual reporting per week.
Designed and optimized PostgreSQL schemas for a multi-tenant architecture serving 220 enterprise clients, reducing average query latency from 480 ms to 62 ms.
Integrated Stripe and Plaid APIs into a subscription billing module that processed $900 K in monthly recurring revenue with zero payment-reconciliation errors over 18 months.

Junior Web DeveloperAug 2016 - May 2018

Brightpath Digital Agency, Dallas, TX

Delivered 23 client websites using WordPress, Vue.js, and custom REST APIs, maintaining a 97% on-time delivery rate across a 14-person project roster.
Improved Core Web Vitals scores for 8 e-commerce clients, achieving a median Largest Contentful Paint of 1.4 s and lifting organic search traffic by an average of 29%.
Automated deployment workflows with GitHub Actions and Bash scripts, reducing manual release time from 90 minutes to under 8 minutes per project.

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