Elevate Your

Senior Software Engineer

Building React, TypeScript and Rails products at Wysh Life & Health Insurance.

Based in New York City.

Anthony Mejia

Engineered in NYC

Senior Software Engineer specialized in building high-quality web applications with a focus on performance, scalability, and user experience.

With over 8 years of experience in the tech industry, I have honed my skills in various programming languages and frameworks. My passion lies in creating efficient and innovative solutions that drive business success.

Lower Manhattan and One World Trade Center across the Hudson River beneath a blue sky with clouds
Looking up at a stone tower and the underside of the Brooklyn Bridge under an overcast sky
Aerial view of Manhattan at dusk with the Empire State Building rising through haze
Midtown Manhattan and the United Nations headquarters across the East River, framed by tree branches
The Manhattan Bridge framed by brick buildings above a cobblestone street in Brooklyn
Career · 2018 – Now

Experience

Four roles at two companies, from Junior Web Developer to Senior Software Engineer.

8+ Years

Professional Software Engineering experience

  • Since Jun 2018
  • Four roles
  • Two companies

API Design

Typed GraphQL and REST APIs connecting React clients to Rails services.

  • GraphQL
  • REST
  • React
  • Rails

Backend & Scalability

Scaled and future-proofed a Rails document generation system for regulated workflows, kept a Node.js microservice platform reliable under growing traffic, and added production monitoring with New Relic.

  • Rails
  • Node.js
  • Microservices
  • New Relic

Frontend Architecture

Bootstrapped the TypeScript and React web client and defined its architecture, then modernized its state management with Redux Toolkit.

  • TypeScript
  • React
  • Redux Toolkit

Technical Leadership

Directed non-core product initiatives that opened new business opportunities, and set architectural and technical direction across teams and projects.

  • Product initiatives
  • Architectural direction
  • Cross-team

AI Tooling

Redesigned the SDLC for agents, with a spec and validation criteria required for every agent task.

  • Agentic coding
  • MCP servers
  • LLM evaluation

Engineering Standards

Established frontend engineering standards for a growing team, improving consistency, maintainability and onboarding for junior peers.

  • Standards
  • Architecture
  • Onboarding

Animation & Performance

A 14-page banking site with complex GSAP animation systems and a 97 Lighthouse SEO score, driving a 200% increase in user growth in its first month.

  • GSAP
  • 97 Lighthouse SEO
  • 200% user growth
Related rolesAll four roles

Senior Software Engineer at Wysh Life & Health Insurance

Jun 2022 – Present

Leading Wysh web platform evolution and cross-team initiatives across React/TypeScript and Rails products.

  • Led adoption of agent-driven development, with agents authoring 30%+ of merged PRs and PR cycle time down 50%+.

  • Redesigned the SDLC for agents, requiring a spec with validation criteria for every agent task and splitting large changes into stacked PRs through complexity-based size tiers.

  • Built shared agent tooling used org-wide, including convention-encoding context files, custom skills and subagents, and lint and type-check hooks that block noncompliant output.

  • Scaled our Rails platform document generation system supporting regulated workflows through evolving product and compliance requirements.

  • Built an LLM defect triage pipeline that diagnoses alerts, assigns severity and owner, and opens tickets, cutting time-to-triage 75%+ with 85%+ of tickets routed correctly.

  • Built agent quality controls, including a merge-gating CI reviewer with justified overrides, fixture-based regression suites, and LLM-as-judge scoring.

  • Built TypeScript MCP servers that expose the GraphQL API contract and production observability data to coding agents, adopted org-wide.

  • Architected a dynamic multi-step form system in TypeScript/React that reduced customer bounce rate and increased qualified inbound conversion.

  • Shipped and maintained a versioned agent plugin integrated in our SDLC, packaging custom skills, subagents, and lint and type-check hooks that encode Wysh's engineering standards.

  • Directed multiple non-core product initiatives that opened new business opportunities by establishing architectural direction and engineering standards across teams.

  • Built developer-facing tooling that standardized workflows, reduced manual effort, and improved engineering and QA validation efficiency across projects.

Software Engineer at Wysh Life & Health Insurance

Feb 2020 – Jun 2022

Architected and scaled Wysh's TypeScript/React client while improving platform reliability and safety.

  • Architected and bootstrapped our TypeScript/React web client, defining frontend architecture while scaling performance and maintainability over multiple years.

  • Established long-term technical direction for the web platform by modernizing state management through migration from Redux to Redux Toolkit.

  • Defined TypeScript interfaces aligned with our Rails GraphQL API schema, enforcing type safety for all queries and mutations requested by our client application.

  • Implemented observability and logging using New Relic, enabling production monitoring, faster issue detection, and data-driven performance decisions.

  • Generated TypeScript types from our Rails GraphQL API schema for 100% type coverage, consumed by our React client's API responses.

Full-Stack Developer at AD:60

Jun 2019 – Feb 2020

Delivered React/TypeScript frontends with Rails APIs while setting engineering standards across products.

  • Built and shipped a production React and TypeScript frontend paired with a Rails REST API, progressing from storyboard to MVP within 1 quarter.

  • Established frontend engineering standards for our growing engineering team, improving consistency, maintainability, and onboarding for junior peers.

  • Contributed to multiple concurrent financial products across frontend and backend stacks, establishing consistent engineering standards and guiding technical direction across projects.

Junior Web Developer at AD:60

Jun 2018 – Jun 2019

Built animation-heavy banking experiences and enhanced NodeJS services while maintaining reliability.

  • Architected and delivered a 14-page banking website with complex animation systems and transitions (GSAP), driving a 200% increase in user growth within the first month of our initial production release.

  • Maintained a 97 Lighthouse SEO score while implementing animation-heavy interfaces, balancing accessibility, performance, and visual complexity.

  • Designed and enforced a modular frontend architecture that improved long-term maintainability and was recognized by senior leadership and our client's engineering team.

  • Integrated pivotal features into a Typescript/NodeJS (HapiJS framework) microservice platform while preserving reliability under increasing traffic demands.