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Climate Tech, Energy Technology, FinTech, Data Analytics, SaaS

Senior Software Engineer

New York, United StatesHybridFull TimeSenior$180,000–$210,000 /yrPosted 2 months agoVisa sponsorship available

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Role summary

A fast-growing AI startup is seeking a Senior Full Stack Engineer to help scale their innovative product that uses agentic workflows to streamline business operations. This hybrid role, based in Brooklyn, requires a strong background in full stack development (React/TypeScript frontends, Node.js/Java/Python backends) with a lean towards backend systems and architecture. You will design and maintain scalable APIs and data pipelines, integrate AI/LLM capabilities, and contribute to both frontend and backend development. The ideal candidate has 5+ years of full stack experience, 1-2 years in a startup environment, and a genuine interest in AI production applications. Bonus points for experience with Next.js, cloud platforms (AWS, GCP), containerization, or LLM tooling.

A fast-growing AI startup is building a product that will change how businesses find and manage what they need to operate. Using agentic workflows, they're turning a traditionally manual, fragmented process into something seamless and intelligent. They're looking for a Senior Full Stack Engineer who can move fluidly across the stack, with a lean toward backend systems, to help scale a platform where AI is core to the product, not just a feature.

This isn't a "sit in your lane" role. You'll collaborate directly with founders and senior engineers, ship fast, and have real ownership over features that matter.

This role is 4 days/week in Brooklyn. Candidates must be comfortable with a hybrid work setting.

What you'll be doing:

  • Building and owning full stack features across React/TypeScript frontends and Node.js, Java, and Python backend services
  • Designing and maintaining scalable APIs, data pipelines, and backend architecture
  • Integrating AI/LLM-powered capabilities (OpenAI, Anthropic, RAG pipelines) into core product workflows
  • Contributing to frontend UI and product experiences while driving backend decisions
  • Prototyping and shipping new features alongside founders and product teams

What they're looking for:

  • 5+ years of full stack experience with strong JS/TS fundamentals and production React
  • Solid backend experience in Node.js, with Java or Python a big plus
  • 1-2 years of recent startup experience, you know how to move fast and build in ambiguity
  • Comfort with API design, system architecture, and working across the full stack
  • Genuine interest in AI and what it can actually do in production

Bonus points for:
Next.js, cloud/infra (AWS, GCP), containerization, or experience with LLM tooling and agentic systems.

Why this one is worth your time:
Early-stage equity with real upside. Direct collaboration with founders and senior engineers. A product tackling a massive, underserved market with AI at its core. If you want to architect systems that actually scale and ship things that matter, this is the room to be in.

Ready to apply?
You'll be redirected to Arcadia's application page.

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