Looking for a job

Will Mendes

@willmendes

Message

Principal Frontend Engineer at InvestorBase who cut platform costs by 45% and built AI-powered customer experiences.

Brazil

Message

At InvestorBase, I cut platform costs by 45% by blocking large-scale scraping and replacing inefficient database lookups. I also built the tracking and experiment foundation for growth and A/B testing, contributing to a 15% revenue increase.

Previously, at LeafLink, I led a monolithic frontend migration to a scalable single-page application, reducing time-to-market by 20% and improving reliability by 30%. My work has also included Jira performance improvements at Atlassian, a vaccine-development sample management system at NearForm, and open-source projects including NGX Skeleton Loader, Vue Skeleton Content Loader, and React Sweet Wizard.

Experience

Work history, roles, and key accomplishments

Current

Principal Frontend Engineer

Current

InvestorBase

Sep 2025 - Present (1 year 1 month)

Cut platform costs by 45% by blocking large-scale scraping and reducing database round trips. Introduced release practices and built tracking and experiment foundation, contributing to a 15% revenue increase.

OpenAI Vercel AI SDK Server Sent Events Next.js React TypeScript Tanstack Query Tailwind Firebase Supabase Stripe Mapbox Vercel Playwright Jest Biome ESLint Semgrep GitHub Actions Zod Meta Pixel CAPI GA4 AWS Serverless

Staff Frontend Engineer

LeafLink

May 2023 - Aug 2025 (2 years 3 months)

Led migration from monolithic frontend to a scalable SPA, reducing time-to-market by 20% and improving reliability by 30%. Designed and developed a Purchase Order Management System with integrated third-party platforms.

Vue.Js NodeJS TypeScript PostgreSQL Redis GraphQL Tailwind Cypress Vite Vitest Docker React React Native PII PHI SOC2 Kinesis DynamoDB

Principal Software Engineer

Ladders

Mar 2022 - Mar 2023 (1 year)

Reduced payment processing costs by 20% through integration with leading payment providers. Improved website performance by 30% and enhanced monorepo efficiency during migration to micro frontend app.

React Angular Vue.Js TypeScript NodeJS Python Docker Google Analytics Splunk Kibana SignalFx

Senior Frontend Engineer

NearForm

Mar 2021 - Mar 2022 (1 year)

Developed a sample management system for vaccine development, reducing response times by 35% and sample loss by 40%. Enhanced monorepo efficiency and defined software architecture.

React Fastify Angular NodeJS GraphQL Webpack Docker

Senior Software Engineer

Atlassian

Jul 2018 - Mar 2021 (2 years 8 months)

Improved Jira's user experience and performance, increasing Apdex score by 15 points. Led the Media Multi-Region Project and worked on the official COVID-19 app for the Australian Government.

React NodeJS Go Lua Java AWS Kubernetes Design Systems Webpack Parcel CSS in JS Jest CI CD Bitbucket Docker PII PHI SOC2 Kinesis Kafka DynamoDB PostgreSQL Serverless Lambda

Senior Software Engineer

Domain.com.au

Jul 2017 - Jul 2018 (1 year)

Improved performance and scalability of frontend applications, reducing load times and improving UX. Integrated AWS cloud solutions for better scalability and reliability.

React NodeJS AWS Amazon SQS SNS Event Sourcing C#Design Systems Webpack CI CD Docker MariaDB

Fullstack Software Engineer

Pragmateam

Nov 2015 - Jun 2017 (1 year 7 months)

Performed performance improvements, tests, and validations in microservice environments using NodeJS and Ruby. Helped define software architecture and set up technology stacks.

React NodeJS AWS Design Systems Webpack CoffeeScript CI CD Docker