Senior Full Stack Software Engineer

AI Talent Now; San Mateo (CA); On-site; USD 160,000 - 230,000; Full time

Job summary

AI Talent Now is seeking a Senior Full-Stack Software Engineer in San Mateo to join as a core contributor building a production platform from the ground up at the intersection of process intelligence and agentic AI.

The role demands hands-on leadership, shipping idiomatic Go, React frontends, and integrating LLMs into production systems, with significant technical decision-making authority in a fast-moving, seed-stage environment.

Qualifications

• 5+ years building production software across the full stack.
• Backend experience in Go, C++, Java, Scala or C.
• Python services development and AI tooling integration.
• PostgreSQL schema design and migrations.
• React frontend with TypeScript proficiency.
• Experience designing and shipping LLM-enabled systems.
• Strong ownership and decision-making in early-stage projects.
• Comfort with evolving requirements and priorities.

Skills

5+ years production software

Go

C++

Java

Scala

C

Python

PostgreSQL

React

TypeScript

LLM systems design

Ownership mentality

Pragmatic mindset

Ambiguity tolerance

Tools

Claude Code

Cursor

Copilot

Job description

San Mateo, United States | Posted on 11/11/2026

AI Talent Now, LLC is a powerhouse in direct-hire talent acquisition, connecting exceptional talent with industry-leading organizations across IT, Engineering, Financial Services & Fintech, and Manufacturing & Robotics. Headquartered in Atlanta, Georgia, we proudly serve clients and candidates nationwide.

Job Description

AI Talent Now Job ZR 111

About this role

We are looking for a Senior Full-Stack Software Engineer with 5+ years of experience to join as a core contributor building a production platform from the ground up at the intersection of process intelligence and agentic AI. You'll be an early engineering hire at a Lightspeed-backed seed-stage company that is already transforming operations for large enterprises.

We need someone who has made architectural decisions, lived with the consequences, and iterated — a builder who writes idiomatic Go, ships React frontends, and has hands-on experience integrating LLMs into production systems. You'll work directly with the founders and have significant technical decision-making authority in a young, clean codebase.

Requirements

What we're looking for

Must-haves

• 5+ years building production software, with experience shipping across the stack and sustained ownership of meaningful systems.
• Strong backend engineering in a typed language: You have production experience in Go, C++, Java, Scala, or C and can design and operate reliable backend systems.
• Python proficiency: You can build and maintain Python services, work with async patterns, and integrate with AI/ML tooling
• PostgreSQL skills: Database schema design, migrations, and production operations
• React and TypeScript: You can build and maintain a modern React frontend (hooks, context, component composition)
• Hands-on LLM systems design: You have personally built and shipped systems leveraging LLM APIs and understand LLM development patterns (e.g., orchestration, tool calling)
• Pragmatic mindset: You know when to refactor vs. ship, when to build vs. buy, and how to manage technical debt intentionally
• Ownership mentality: You take end-to-end responsibility for features, from design through deployment and monitoring
• Comfort with ambiguity: Early-stage startup means evolving requirements and shifting priorities

Strongly preferred

• Customer-facing communication: Clear written and verbal communicator with users/customers
• Vector search / embeddings: RAG patterns, hybrid search
• AI-assisted development: You already use tools like Claude Code, Cursor, Copilot, or similar to accelerate your work
• Production operations: Observability, incident response, system reliability

Nice to have

• Infrastructure as Code: Terraform, GCP, container orchestration
• Real-time systems: Server-Sent Events (SSE), WebSockets, streaming APIs