Hi, my name is

Alex Mercer.

I build things for the web.

I'm a full-stack engineer specializing in building exceptional digital experiences. Currently, I'm focused on helping startups architect scalable systems and ship products faster.

See my work  ↓
01.

About Me

Hello! I'm Alex, and I've been building web applications for over 8 years, starting with PHP and jQuery (yes, really) and evolving into a full-stack JavaScript developer focused on React, Node.js, and cloud architecture.

My experience spans startups, scale-ups, and enterprise — from building MVPs for YC-backed companies to leading platform migrations for Series C startups.

Here are some technologies I've been working with recently:

  • JavaScript (ES6+)
  • TypeScript
  • React & Next.js
  • Node.js
  • PostgreSQL
  • AWS / GCP
02.

Where I've Worked

Senior Full-Stack Engineer @ Dataflow

Jan 2023 — Present

  • Architected a real-time data pipeline processing 2M+ events per day using Node.js, Kafka, and PostgreSQL
  • Led the frontend migration from Angular to Next.js, reducing bundle size by 45% and improving load times
  • Built and shipped the public API used by 300+ enterprise customers, handling 10K requests per minute
  • Mentored a team of 4 junior engineers through code reviews, pair programming, and architecture workshops

Full-Stack Developer @ NovaTech

Mar 2021 — Dec 2022

  • Built and maintained 12+ React dashboards for the analytics platform, used daily by 50K+ active users
  • Implemented a GraphQL gateway in front of 8 microservices, simplifying client data fetching and reducing payload sizes
  • Refactored the rendering pipeline and asset strategy, cutting initial page load times by 60% across the product

Software Engineer @ Apex Systems

Jun 2019 — Feb 2021

  • Built a suite of internal tools that automated reporting workflows and saved the operations team 20+ hours per week
  • Led the migration of legacy infrastructure to AWS, cutting hosting costs by 35% and improving system reliability
  • Automated CI/CD deployment pipelines with GitHub Actions and Terraform, reducing release times from hours to minutes

Independent Consultant @ Freelance

2017 — 2019

  • Built MVPs for 8 early-stage startups, taking products from idea to first paying customers in weeks, not months
  • Designed and shipped RESTful APIs and integrations consumed by web, mobile, and partner clients
  • Delivered 15+ end-to-end projects across e-commerce, fintech, and SaaS — all on time and within budget
03.

Things I've Built

Featured Project

CloudForge

A full-stack platform for deploying containerized applications. Includes a visual pipeline editor, real-time logs, and integrations with GitHub, GitLab, and Bitbucket.
  • Next.js
  • TypeScript
  • Docker
  • Redis
  • WebSockets

Featured Project

HealthPulse

A patient monitoring dashboard for remote healthcare providers. Real-time vitals visualization, automated alerting, and HIPAA-compliant data handling.
  • React
  • Node.js
  • PostgreSQL
  • Chart.js
  • AWS Lambda

Featured Project

CryptoLens

A cryptocurrency portfolio tracker with real-time price feeds, portfolio analytics, tax calculation, and custom alert configurations.
  • TypeScript
  • React Native
  • GraphQL
  • Redis
  • Binance API
04.

What's Next?

Get In Touch

I'm currently open to new consulting engagements and full-time opportunities. Whether you have a project in mind, a question, or just want to say hello — my inbox is always open.

Say Hello