Sr. Full Stack Software Engineer

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

Benefits offered by this job

Health benefits

Growth opportunities

Remote-first culture

Autonomy and ownership

Job summary

UserGems is seeking a Senior Full-Stack Software Engineer to bolster one of its web application teams. The role centers on PHP/Laravel backend work with selective TypeScript/Vue frontend tasks, building scalable, data-heavy processing systems and a customer-facing UI.

You will own end-to-end features, collaborate with product managers and data scientists, and help design high-performance MySQL schemas while operating in a remote-first setup with teams across Europe and Brazil.

Qualifications

• 4+ years of PHP development experience, preferably with Laravel.
• 2+ years frontend or full-stack development using TypeScript.
• Expertise in relational database modeling, query optimization, and high-performance tuning.
• Ability to own outcomes, be reliable, and operate in a small, fast-moving team.
• Fluent English, comfortable working asynchronously across time zones.

Responsibilities

• Build customer-facing interfaces with product managers and teammates.
• Develop scalable background processing jobs handling terabytes of data.
• Create features for use by humans and AI agents, including MCP integrations.
• Maintain connections with external data providers and robust ingestion pipelines.
• Collaborate on database design in MySQL and optimize queries.
• Work with data scientists to optimize AI workflows and system performance.

Skills

PHP/Laravel

TypeScript

Relational database modeling

Query optimization

Performance tuning

Independent ownership

Asynchronous collaboration

Tools

MySQL

Job description

Role overview

An AI-powered sales intelligence platform that helps B2B sales and marketing teams identify target accounts and act on buying signals is hiring a Senior Full-Stack Software Engineer to join one of its three web application teams. The role is backend-dominant on PHP/Laravel, with select frontend work in TypeScript/Vue, focused on building scalable, data-heavy processing systems and customer-facing UI.

Responsibilities

• Build customer-facing interfaces in collaboration with a product manager and teammates.
• Develop scalable background processing jobs that handle terabytes of data.
• Build new features designed for use by both humans and AI agents, including MCP-based integrations.
• Integrate and maintain connections with external data providers, ensuring reliability and consistency across ingestion pipelines.
• Participate in architectural discussions, make sound trade-off decisions, and design, build, and optimize relational database structures in MySQL.
• Collaborate with data scientists to optimize AI workflows and prompts, and debug, profile, and tune systems for reliability and performance at scale.

Requirements

• 4+ years of experience as a PHP developer, preferably with Laravel.
• 2+ years of experience as a frontend or full-stack developer using TypeScript.
• Expertise in relational database modeling, query optimization, and high-performance tuning.
• Ability to take ownership of outcomes rather than just tasks, with reliability and consistent availability.
• Comfort working independently and self-organizing within a small, fast-moving team.
• Fluent written and spoken English, with experience working asynchronously across time zones; comfort in a startup or fast-moving environment.

Nice to have

• Active use of AI tooling in day-to-day development workflows.
• Curiosity and willingness to explore unfamiliar systems, plus a pragmatic balance between technical purity and delivery speed.

Benefits and work setup

• Full-time remote role; engineers are based primarily in Europe and Brazil.
• Remote-first culture with in-person company and department off-sites.
• High-trust environment with autonomy and ownership of components within the first few months.
• Target compensation range of $80,000–$100,000 annually, depending on experience.
• Health benefits, competitive salary, and growth opportunities.