Senior Full-Stack Engineer (Remote) — AI-Driven Platform

UserGems; United States; Remote; USD 80,000 - 100,000; Full time

Job summary

UserGems is seeking a Senior Full-Stack Engineer to join our AI-powered signal platform. You will own backend processing with PHP/Laravel and contribute to frontend work in TypeScript, building scalable data-heavy systems that power AI-driven sales intelligence.

This remote, full-time role collaborates across Europe, Brazil, and the U.S., with a high-autonomy environment and a strong focus on delivering reliable, maintainable code.

Qualifications

• 4+ years of experience as a PHP developer (preferably with Laravel).
• 2+ years of experience as a frontend or full stack developer (TypeScript).
• Ability to take ownership of outcomes, not just tasks.
• Full-time focus in a small, fast-moving team.
• Reliable, consistent, and communicates openly when priorities change.
• Expertise in relational database modeling, query optimization, and high-performance tuning.
• Experience in a startup or fast-moving environment.
• Ability to work independently and self-organize.
• Fluent in English (written and spoken).
• Curious mindset and willingness to explore unfamiliar systems.
• Pragmatic: balance technical purity with delivery speed.

Responsibilities

• Build user facing UIs in collaboration with a product manager and teammates.
• Build scalable data heavy background processing jobs handling terabytes of data.
• Develop features with humans and AI agents in mind (MCP).
• Integrate and maintain connections with external data providers ensuring data quality.
• Participate in architectural discussions and make sound trade-off decisions.
• Design, build, and optimize relational database structures (MySQL).
• Collaborate with data scientists to optimize AI workflows and prompts.
• Debug, profile, and tune systems for reliability and performance at scale.
• Write clean, maintainable, and testable code with long-term stability in mind.
• Continuously improve workflows, deployment, and monitoring practices.

Skills

PHP (Laravel)

TypeScript

Ownership

English communication

Tools

Laravel (backend framework)

TypeScript

MySQL

OpenSearch

RabbitMQ

Datadog

GitHub

Linear

Job description

UserGems is seeking a Senior Full-Stack Engineer to join our AI-powered signal platform. You will own backend processing with PHP/Laravel and contribute to frontend work in TypeScript, building scalable data-heavy systems that power AI-driven sales intelligence.

This remote, full-time role collaborates across Europe, Brazil, and the U.S., with a high-autonomy environment and a strong focus on delivering reliable, maintainable code.