Senior Software Engineer

NegotiateAI

$150K — $180K *
Enterprise Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of software engineering experience with end-to-end production delivery
  • Strong backend skills focused on API design and data pipelines
  • Hands-on experience with LLMs in production environments
  • Experience handling messy real-world data for cleaning and normalization
  • Familiarity with cloud infrastructure (AWS or GCP) and production practices
  • Strong product sense for identifying valuable solutions from customer feedback
  • Ability to navigate early-stage startup ambiguity effectively

Responsibilities

  • Build and maintain core backend services for the procurement platform
  • Develop systems for categorizing indirect spend and resolving supplier data
  • Ship customer-facing features for spend visibility and supplier benchmarking
  • Create evaluation and monitoring systems for AI accuracy and regression detection
  • Define architectural direction and mentor junior engineers
  • Implement security and data privacy practices for user data protection

Benefits

  • Work directly with the founder and early customers
  • Be part of a small, agile engineering team
  • Own significant parts of the product from inception to deployment
  • Opportunity for technical leadership without direct reports
  • Engage in fast-paced iteration based on customer feedback
Full Job Description
About this role

You'll be one of the first engineers on the team, building the systems that power our AI-driven procurement platform. You'll own meaningful pieces of the product end to end, and work directly with the founder and our earliest customers to figure out what to build next.

This is a hands-on role with a technical leadership component, but no direct reports.

What you'll do
  • Build and own core backend services, including integrations with ERP systems, supplier databases, and spend analytics tools.
  • Build the agentic systems at the core of the product: pipelines that categorize indirect spend and resolve part identifiers from incomplete supplier data, and agents that source online benchmarks, gather supplier contacts, and support automated negotiation.
  • Ship customer-facing features for real-time spend visibility and supplier benchmarking, and iterate quickly on customer feedback.
  • Build evaluation and monitoring for our AI systems so we can measure accuracy and catch regressions before customers do.
  • Set architectural direction for the systems you own, and mentor engineers earlier in their careers.
  • Apply security and data privacy practices, including anonymization, tokenization, and secure sandboxes for model work.

Must haves
  • 5+ years of professional software engineering experience, with a track record of shipping production systems end to end.
  • Strong backend engineering skills, including API design and data pipeline work. Depth matters more to us than experience in any particular language.
  • Hands-on experience building with LLMs in production, including agentic workflows, tool use, context and retrieval strategies, and evaluation.
  • Experience shipping against messy real-world data: cleaning, normalization, entity resolution, and establishing ground truth.
  • Comfortable with cloud infrastructure (AWS or GCP) and standard production practices: CI/CD, testing, and observability.
  • Product sense. You can take an ambiguous problem, talk to a customer, and decide what's actually worth building.
  • A drive to improve developer experience and team velocity in the AI era, through internal tooling and agent-assisted workflows.
  • Comfort with early-stage ambiguity: a small team, shifting priorities, and shipping before everything is fully specified.

Nice to haves
  • Deep production experience with TypeScript.
  • Experience designing agent harnesses: the scaffolding that makes a model reliable in production.
  • Experience with ClickHouse, or with other columnar analytics stores such as BigQuery, Snowflake, or Databricks.
  • Experience integrating with enterprise systems such as SAP, Oracle, NetSuite, Coupa, or Ariba.
  • Background in procurement, supply chain, sourcing, or marketplace software.
  • Experience meeting SOC 2, GDPR, or similar compliance requirements at a startup.
  • Experience at an early-stage startup (seed through Series B).
  • Experience across both B2B and B2C, with a sense of how to make enterprise software feel consumer-grade.

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