Founding Full Stack Engineer

NxT Level

$180K — $220K *
Enterprise Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 5-7 years of experience in full-stack development with a focus on frontend technologies (React/Next.js/TypeScript)
  • Practical knowledge or strong interest in building agentic systems with a quick learning curve
  • Proven experience managing third-party API integrations end-to-end
  • Ability to iterate quickly while maintaining high quality in outputs
  • Comfortable navigating ambiguity with a proactive, ownership mindset
  • Excellent communication skills, promoting clarity and collaboration among teams

Responsibilities

  • Build and ship features across full stack technologies, including frontend and backend systems
  • Own the entire lifecycle of third-party integrations from scoping to deployment
  • Collaborate with engineers to enhance system stability and delivery speed
  • Develop AI-powered features for litigation, focusing on document extraction and agent orchestration
  • Contribute to backend optimizations and upgrades for scalable reliability
  • Respond quickly to issues, embodying adaptability in a startup environment

Benefits

  • Equity ownership opportunity (0.2%-0.5%) as a founding team member
  • Remote work flexibility available for U.S.-based candidates
  • Preference for candidates located in NYC, which may enrich team dynamics
  • Opportunities to work in a high-impact, early-stage startup environment
  • Collaborative team culture that emphasizes communication and support
Full Job Description
Founding Engineer (AI Agents + Frontend Craft)

Location: Remote (U.S.) - strong preference for NYC | 4+ hours overlap with Eastern Time daily
Compensation: $180,000-$220,000 base
Equity: 0.2%-0.5%
Visa: No New sponsorship (H1B transfers and TNs only)

The Role

This is a high-ownership, high-range founding role. You'll own frontend craft for the primary AI interface and go deep on agent architecture-orchestrators, sub-agents, tool-use patterns, and evaluation loops. You'll move between polished UX work and core agent infrastructure, often in the same week (sometimes the same day).

If you thrive in early-stage environments and want to build a product where correctness is non-negotiable, this role is built for you.

What You'll Do
  • Build and ship across the full stack-React, Next.js, TypeScript, backend services, and AI systems-often within the same day
  • Own third-party integrations end-to-end (scoping → implementation → deployment), including tools like Clio, iManage, Salesforce, and others
  • Collaborate closely with a small team of full-stack and data engineers to improve system stability, performance, and delivery velocity
  • Develop AI-powered features for litigation workflows, including:
    • document extraction
    • agent orchestration (orchestrators + sub-agents)
    • RAG pipelines
    • anti-hallucination scaffolding and reliability guardrails
  • Contribute to backend optimization and system upgrades to improve reliability at scale
  • Move fast when issues arise-this is a startup where adaptability and urgency are part of the job

What Our Client Is Looking For
  • Strong full-stack fundamentals with excellent frontend craft (React/Next.js/TypeScript)
  • Practical experience building agentic systems or strong interest with the ability to learn quickly: tool-use patterns, orchestration, retrieval, and eval loops
  • Experience owning integrations with third-party APIs and systems (auth, rate limits, edge cases, monitoring)
  • A "ship it" mindset: you can iterate fast without sacrificing quality and you can explain what you built
  • Comfortable in ambiguity and excited by early-stage ownership
  • Strong communication skills-clear, direct, and collaborative

Compensation & Equity
  • Base salary: $180,000-$220,000
  • Equity: 0.2%-0.5% (founding-hire level ownership)

Location & Work Authorization
  • Remote U.S.-based, with strong preference for NYC
  • Eastern Time overlap: 4+ hours daily
  • No visa sponsorship (H1B transfers and TNs only)

Interview Process
  1. Intro Call (20-30 min): founders assess communication style, startup readiness, and how you work day-to-day (no technical evaluation)
  2. Take-Home Challenge: timed coding exercise + Loom walkthrough explaining approach and decisions (tests shipping ability and self-auditing)
  3. Technical Deep Dive (60 min): live walkthrough of take-home with founders-tests depth of understanding, decision-making, and ability to defend tradeoffs

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