Full Stack Engineer Lead

POS360, Inc.; Westlake Village (CA); On-site; USD 150,000 - 200,000; Full time

Benefits offered by this job

401(k) matching

Health insurance

Vision insurance

Paid time off

Free on-site gym access

Job summary

POS360, Inc. is seeking a seasoned Full Stack Engineer Lead to guide the design, development, and delivery of our web applications end to end, while mentoring engineers and setting technical direction across the front-end and back-end stack.

This role blends hands‑on engineering with technical leadership; you’ll architect scalable systems, drive engineering best practices, and partner with product and design to ship high‑quality software.

Qualifications

• 7+ years of professional software engineering experience across full stack.
• 2+ years in a technical lead or engineering management role.
• Strong proficiency in React + TypeScript; Node.js/NestJS on the backend.
• Deep understanding of system design and microservices.
• Experience with SQL and MongoDB; REST and GraphQL APIs.
• Cloud infrastructure (AWS), CI/CD, Docker, Kubernetes.
• Experience with AI coding assistants and LLM integrations.
• Familiarity with JIRA and Confluence.
• Bachelor’s degree in CS/Engineering or equivalent.

Responsibilities

• Lead architecture, design, and development of full stack apps across frontend and backend.
• Set engineering standards and architectural patterns; mentor engineers.
• Plan technical work, break into milestones, and coordinate with product.
• Evaluate build vs. buy decisions and new technologies.
• Collaborate with product, design, QA, and other teams; drive features.
• Participate in on-call rotation and resolve production issues.
• Design scalable, secure systems; REST/GraphQL APIs; SQL & MongoDB schema.
• Promote DevOps, CI/CD, testing, and monitoring practices.
• Foster AI-powered workflows and agentic tooling in development.

Job description

We are a rapidly growing technology company specializing in point-of-sale payment processing and delivery integrations for locally owned brick-and-mortar stores. Our mission is to accelerate the transition from traditional electronic cash registers to powerful new point of sale products. Our highly specialized systems address the specific pain points identified through over a decade of working with neighborhood stores, markets, and restaurants. With an unrivaled dedication to delivering superior tools that are easy to use and a technical team providing industry-leading support, our systems open the door to the next level of success for our clients.

About The Role

We are looking for an experienced Full Stack Engineer Lead to guide the design, development, and delivery of our web applications end to end, while mentoring engineers and setting technical direction across the front-end and back-end stack.

This role blends hands‑on engineering with technical leadership; you’ll architect scalable systems, drive engineering best practices, and partner closely with product and design to ship high‑quality software. You’ll also help shape how the team leverages AI‑augmented development workflows, coding assistants, and agentic tooling to accelerate delivery.

What You’ll Own & Drive

Technical Leadership & Direction

• Lead the architecture, design, and development of full stack applications spanning front-end (React/TypeScript) and back-end (Node.js, NestJS, TypeScript) systems.
• Set technical direction and establish engineering standards, coding practices, and architectural patterns across the team.
• Mentor and provide technical guidance to engineers, conducting code reviews and fostering growth in both frontend and backend disciplines.
• Own technical project planning, breaking down initiatives into milestones, estimating effort, and coordinating delivery with product managers and stakeholders.
• Evaluate build vs. buy decisions, new technologies, and third‑party services, and make recommendations to leadership.
• Collaborate cross‑functionally with product, design, QA, and other engineering teams to deliver cohesive, high‑quality features.
• Participate in on‑call rotation and troubleshoot complex production issues across the stack.

Architecture & Systems Engineering

• Design and oversee scalable, secure, and performant systems, including microservices, RESTful and GraphQL APIs, and database architecture (SQL and MongoDB).
• Ensure system reliability, scalability, and observability through sound DevOps, CI/CD, testing, and monitoring practices.

AI-Augmented Development

• Drive adoption of AI coding assistants and agentic development tools (e.g., Claude AI, GitHub Copilot, Cursor) to improve team velocity and code quality.
• Champion integration of AI‑powered features, LLM‑backed endpoints, and agentic workflows (tool use, retrieval‑augmented generation, multi‑step orchestration) where they deliver clear business value.

Qualifications

• 7+ years of professional software engineering experience, including full stack development across modern front‑end and back‑end technologies.
• 2+ years in a technical lead, staff engineer, or engineering management capacity, with demonstrated ability to mentor engineers and drive technical decisions.
• Strong proficiency in React and TypeScript on the front end, and Node.js/NestJS on the back end.
• Deep understanding of system design, microservices architecture, and both object‑oriented and functional programming paradigms.
• Hands‑on experience with SQL and MongoDB, including schema design, query optimization, and data modeling.
• Proven experience designing and managing REST and GraphQL APIs at scale.
• Working knowledge of cloud infrastructure (AWS preferred), CI/CD pipelines, and containerization (Docker/Kubernetes).
• Hands‑on experience using AI coding assistants (Claude AI, ChatGPT, GitHub Copilot, Cursor, or similar) as part of day‑to‑day development.
• Exposure to integrating LLMs and agentic frameworks into production systems — e.g., Anthropic Claude API, OpenAI API, function/tool calling, MCP (Model Context Protocol), LangChain, or similar is a strong plus.
• Familiarity with JIRA and Confluence for project tracking and documentation.
• Excellent communication, cross‑functional collaboration, and stakeholder management skills.
• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• 401(k) matching
• Health insurance
• Vision insurance
• Paid time off
• Free on‑site gym access

This role is set in an exciting, fast‑paced environment where innovation drives growth. We offer a collaborative atmosphere that fosters professional growth and development, with the opportunity to shape both the technical direction of our products and the growth of the engineering team.

Position is full‑time from our Westlake Village, CA office.

Compensation range: $150,000 to $200,000 + Bonus

POS360, Inc, Is A Drug Free Workplace

Please note that POS360 is a drug‑free workplace and all candidates are required to undergo a pre‑employment drug screening before being fully employed. This policy is in place to ensure the safety and health of all employees.

POS360, Inc. Is An Equal Opportunity Employer

Equal access to programs, services and employment is available to all persons. Those applicants requiring reasonable accommodation to the application and/or interview process should notify a representative of the Human Resources Department.