Senior Full Stack Engineer

Job Description

Senior / Staff Full Stack Engineer – Applied AI

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New York City

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$190,000–$250,000 + Equity | Hybrid working

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Neulinx have partnered with a high-growth, Series D-backed TravelTech company that's transforming the $100bn+ travel industry through technology and AI.

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Following a recent $60m Series D funding round , the business is expanding its engineering team to build intelligent products that help thousands of travel entrepreneurs automate workflows, manage clients and scale their businesses.

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We're looking for a Senior / Staff Full Stack Engineer (Applied AI) to help develop an AI-powered copilot, building production-grade AI agents, orchestration systems and intelligent automation tools.

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This is a hands-on, product-focused role offering significant ownership across the AI stack, from backend infrastructure and agent frameworks to user-facing applications.

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What you'll be doing

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• Building and scaling production AI agents that automate complex business workflows.
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• Developing MCP tools, LLM integrations and agent orchestration frameworks.
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• Designing reliable tool-calling workflows, streaming responses, retries and guardrails.
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• Building evaluation, observability and regression-testing systems to improve AI performance.
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• Developing full-stack features across Python backend services and modern frontend applications.
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• Working closely with Product and Design to take AI features from concept through to production.
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• Improving latency, scalability and reliability across AI-powered applications.
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What we're looking for

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• 5+ years of full-stack software engineering experience.
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• 3+ years of React, React.js or Angular experience.
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• 3+ years of Python backend development (Django, Flask or similar).
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• Hands-on experience building and deploying LLM-powered applications.
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• Strong API design, distributed systems and relational database experience.
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• Experience with agentic AI, tool calling, MCP, RAG or LLM evaluation frameworks.
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• Comfortable working with emerging AI technologies and taking ownership in a fast-moving environment.
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Bonus points for: Anthropic/OpenAI APIs, agent orchestration, streaming infrastructure, Celery, Redis, RabbitMQ, AWS or Kubernetes.

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What's on offer

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• $185,000–$235,000 base salary + equity
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• Join a well-funded TravelTech company investing heavily in Applied AI.
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• Build AI products with genuine commercial applications and an established user base.
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• Significant technical ownership and influence over AI architecture.
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• Hybrid working from the company's New York office.
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• Unlimited PTO, healthcare, dental, vision and 401(k) matching.
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Interested in building AI agents that solve real-world problems rather than another proof of concept?

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Apply or get in touch with Gareth @ Neulinx for a confidential conversation.