Full Stack Engineer

52 Limited is recruiting for an unnamed hospitality technology startup building an AI-native platform for independent hotels and boutique properties. The Full Stack Engineer will join the founding engineering team, own products and systems end to end, and build and scale the platform across backend, frontend, integrations, and AI systems.

Responsibilities

Ship across the full codebase: backend, frontend, integrations, and AI systems

Architect and scale the platform as we expand into the full hotel operating system

Help set the standards for reliability, security, observability, and engineering quality

Preferred

Prior startup or founding engineer experience is a strong plus

Shipping AI-native products in real production environments

Fast-growing startup experience: ship-fast culture, low bug tolerance, high ownership

Vertical SaaS, marketplace, or workflow software experience

Complex integrations and data-heavy systems

Hospitality, travel, or adjacent industry experience

Startup Experience

Founding Engineer Experience

AI Product Delivery

Production Engineering

Vertical SaaS Experience

Marketplace Experience

Workflow Software Experience

Complex Integrations

Data-Heavy Systems

Hospitality Industry Experience

Travel Industry Experience

High Ownership

Fast-Paced Execution

Benefits

Meaningful equity

Top-tier health coverage — medical, dental, and vision insurance

Room to grow — leadership opportunities as you build skills and experience

Autonomy and direct impact — technical ownership of the entire codebase and real influence on product direction and architecture

Lunch and fitness stipends

Complimentary snacks

Weekly happy hours

Full-time, onsite opportunity based in Williamsburg, Brooklyn, with an expectation of working in the office 4–5 days per week

Company

Boutique staffing firm for technology, digital, and creative talent.

Portland, Oregon, USA

http://52ltd.com/

Founded in 2005

11-50 employees

Qualifications

Strong TypeScript and modern web fundamentals matter most; the rest can be learned here

Bachelor's in Computer Science, or an equivalent rigorous CS background

2–4 years building and owning full-stack web apps end to end

Fluent in modern product engineering. You have built and operated production software using contemporary web, cloud, and data technologies. You learn unfamiliar systems quickly, stay current with the evolving technology landscape, and make pragmatic decisions about when to adopt, replace, or simplify tools

AI-native in how you build. You are highly effective with AI-assisted and agentic development tools and know how to use them to improve engineering speed, quality, and leverage, not simply generate more code. You can establish thoughtful practices around context management, testing, code review, security, documentation, evaluation, and human oversight

Comfortable at the earliest stages. You operate well with ambiguity, move quickly, and know when to introduce structure without slowing the team down

An owner. You take a business problem and run with it, delivering high-quality solutions without micromanagement or granular requirements. Scrappy, resourceful, and proactive

A strong communicator. You can articulate technical decisions and tradeoffs to non-technical stakeholders, in writing and in person

Building and evaluating LLM-powered agents and workflows

Agent orchestration, tool use, retrieval, and context management

Human-in-the-loop systems, permissions, guardrails, and failure recovery

Observability, debugging, testing, and versioning for AI systems

Managing the cost, latency, and reliability of nondeterministic systems

Measuring the product and business impact of AI-powered workflows

Candidates must be authorized to work in the United States

Prior startup or founding engineer experience is a strong plus

Shipping AI-native products in real production environments

Fast-growing startup experience: ship-fast culture, low bug tolerance, high ownership

Vertical SaaS, marketplace, or workflow software experience

Complex integrations and data-heavy systems

Hospitality, travel, or adjacent industry experience

Required skills

Represents the skills you have, click on the tags, TypeScript, Full-Stack Web Development, LLM-Powered Agents and Workflows, Agent Orchestration, Information Retrieval, Context Management, Human-in-the-Loop Systems, AI System Observability and Testing

Preferred skills

Shipping AI-native products in real production environments, Vertical SaaS, marketplace, or workflow software experience, Complex integrations and data-heavy systems, Hospitality, travel, or adjacent industry experience

Experience

2-4 years