10/21/2026 updated

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Staff Software Engineer & Engineering Leader | React, TypeScript, Next.js, Full-Stack Development

Concord, USA
Only remote
B.A. Visual Arts/Web Development, Bethel University
Concord, USA
Only remote
B.A. Visual Arts/Web Development, Bethel University

Profile attachments

nathan-hatfield-resume.pdf

About me

I’m a Staff Software Engineer and former Engineering Manager with 15+ years building web products. Through Codesign, I help businesses modernize applications and turn complex requirements into accessible, maintainable software. I bring hands-on development and practical technical leadership.

JavaScriptNode.jsNext.jsSystems DesignTypeScriptWordPressReact.jsBackendSanity.ioFull Stack DevelopmentGraphQLFront End Software DevelopmentTerraform
Frontend Development
Expertise in building and modernizing production web applications using React, Next.js, TypeScript, JavaScript, HTML/CSS, Tailwind CSS, and Storybook, with a strong focus on shared component systems, code reuse, and implementation consistency across teams.

System Design & Architecture
Deep experience in leading system design and platform architecture for large-scale applications, including monorepos, shared platform patterns, and architectural trade-offs across multiple business units and product teams.

Engineering Leadership & Team Development
Proven track record of leading distributed engineering teams of 3 to 12 engineers and managers, owning technical direction, hiring, mentorship, performance management, and career development across organizations.

Backend & Data Engineering
Solid hands-on experience with Node.js, REST APIs, GraphQL, SQL, PostgreSQL, MySQL, MongoDB, Supabase, and Python (working knowledge), applied in full-stack development and production platform modernization.

Cloud & Infrastructure
Practical experience with AWS, Terraform, CI/CD pipelines, GitHub Actions, Vercel, Netlify, and IAM, including modernizing cloud infrastructure and reducing operational costs for long-term clients.

Accessibility & WCAG Standards
Extensive experience leading accessibility initiatives across consumer-facing websites, adopting WCAG 2.1 AA standards, developing implementation guidance, and integrating automated accessibility testing into development workflows.

Performance & Reliability
Experience improving performance and reliability across high-traffic healthcare and media applications supporting millions of monthly users, including Core Web Vitals optimization and production issue resolution.

Developer Experience & Platform Engineering
Focus on improving developer workflows through shared engineering systems, Rush monorepo tooling, CI/CD improvements, and establishing shared patterns that reduce duplicate development and accelerate delivery.

Technical Strategy & Standards
Experience setting technical direction, defining engineering standards, and aligning engineering execution with product roadmaps and business objectives across multiple teams and business units.

Experience

Professional experience10+ years
Freelancer since2018

Languages

EnglishNative speaker

Project history

Co-Founder & Engineering Consultant

Codesign
Designed and built a full-stack AI governance assessment platform using Next.js, TypeScript, and PostgreSQL, with secure multi-organization access, rules-based scoring, automated reporting, and integrated payments. Builds and modernizes production web applications across frontend, backend, data, and deployment. Leads technical strategy, system design, and implementation for client engagements. Modernized cloud infrastructure and identity systems for a long-term client, reducing annual licensing costs by 92.6% while expanding the managed infrastructure footprint by 43%.

Staff Software Engineer

RVO Health
Designed and built a reusable enrollment platform adopted across three healthcare products, supporting a projected $15-20M revenue opportunity while replacing duplicated implementations with shared architecture. Built shared React and TypeScript components and application patterns used across product teams. Modernized Healthline Media applications by migrating to React and TypeScript and implementing Rush monorepo tooling. Led system design and implementation across four business units. Improved CI/CD pipelines, deployment workflows, and shared engineering systems. Improved performance and reliability across high-traffic healthcare and media applications supporting millions of monthly users.

Staff Software Engineer

Red Ventures
Improved accessibility across 20 consumer-facing websites, raising Axe Monitor passing scores from 2% to 45% overall and from 10% to 80%+ on the highest-traffic sites. Led adoption of WCAG 2.1 AA standards across three business units. Developed accessibility documentation and implementation guidance. Partnered with the Principal Engineer and technical leads to modernize shared frontend architecture and engineering standards. Provided technical direction on automated accessibility testing.

Software Engineering Manager

Red Ventures
Led engineering delivery for two partner launches completed in 15 total development days, supporting a $21M revenue opportunity. Led distributed teams of 3-12 engineers and engineering managers across frontend and backend initiatives. Defined shared platform architecture and engineering standards adopted across four product teams. Led hiring, mentorship, performance management, and career development. Partnered with product and business leaders to align engineering execution with product roadmaps. Drove adoption of LaunchDarkly for controlled UI and API rollouts.

Senior Front End Developer

Red Ventures
Built a shared component system used across multiple sites, reducing development ticket cycle time by 80% while improving consistency and maintainability. Reduced accessibility defects by 95% through audits, implementation fixes, and reusable frontend patterns. Worked across engineering, design, product, and QA to deliver customer-facing features. Took on technical leadership responsibilities ahead of formal management roles.

Associate Front End Developer - Front End Developer

Red Ventures
Progressed through multiple frontend engineering roles, taking on increasing ownership of customer-facing development and major projects. Built and maintained customer-facing web experiences while taking on greater responsibility for feature development and project execution. Introduced feature-flag experimentation practices, enabling controlled releases and production experimentation.

Portfolio


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