Open to opportunities

Isaiah User

@isaiahuser1

Message

Senior software engineer specializing in backend systems, scalable microservices, and performance.

United States

Message

What I'm looking for

I seek backend/platform roles where I can build scalable, secure systems, improve performance, and deliver measurable user and business impact in collaborative teams.

I am a senior software engineer with deep experience designing and implementing backend systems, microservices, and performance optimizations across healthcare, finance, and consumer products. I have led projects that improved reliability, reduced latency, and increased revenue and user engagement.

My recent work includes building resilient Twilio integrations and prioritized call queues using Go and Kubernetes, reducing dropped calls from 40% to 12% and boosting conversions by 28%. At Microsoft, I led frontend performance and growth initiatives that improved load times 25% and increased ad revenue and daily active users.

I bring end-to-end expertise in infrastructure, API design, data modeling, security and compliance (SOC2, PHI, PII, HIPAA), and a track record of shipping systems at scale using Terraform, Kubernetes, and cloud platforms. I focus on measurable outcomes and reliable, maintainable systems.

Experience

Work history, roles, and key accomplishments

Software Engineer

Accompany Health

Aug 2023 - Oct 2024 (1 year 2 months)

Led backend design and implementation of scalable patient communication systems, including heartbeat and priority 'hot leads' queues, reducing dropped calls from 40% to 12% and increasing customer conversions by 28%. Implemented pagination, cryptographically-protected Twilio callback auth, and visit-logging APIs to improve performance and security.

Go Twilio Kubernetes Terraform PostgreSQL Microservices Authentication Scalability

Software Engineer

Microsoft

Jun 2021 - Mar 2023 (1 year 9 months)

Led performance and growth initiatives for Edge's New Tab Page, preloading bundles and offloading components to improve load times by ~25% (300–400ms) and drove projects increasing ad revenue by $1M/yr and DAU by millions; used AI-based A/B testing to raise DAU by 4%.

TypeScript React Performance Optimization A B Testing Growth JavaScript Telemetry

Software Engineer

Marqeta

Jul 2020 - Mar 2021 (8 months)

Designed and implemented a backend payment order service (Java/Spring Boot) integrated with Modern Treasury to process high-volume flows and provisioned Terraform infrastructure to support >100M transactions/day with encrypted storage and Vault-backed secrets.

Java Spring Boot Terraform Payments & Security Vault Infrastructure Scalability

Software Engineer

Earnin

Sep 2017 - Apr 2020 (2 years 7 months)

Built Earnin's first backend microservice and bank-integration services (C#/.NET Core) integrating Plaid/Empyr to serve 200k+ users initially and support data for over 2M users, increasing app engagement and DAU by ~40%. Extracted bank connection into a microservice, reducing latency by 15%.

C++.NET Core MySQL Redis Plaid Microservices Data Integration Performance Optimization

Software Engineer

Blueprint, Technology for Non-Profits

Sep 2015 - May 2017 (1 year 8 months)

Developed Ruby on Rails applications including an online course platform for restorative education and a spreadsheet management portal that reduced clerical errors by 50% and modernized accounting for the California Rangeland Trust.