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Software Engineer II, General

New York, New York, United States, San Francisco, California, United States

About Instalily

InstaLILY is a New York-based AI startup working at the cutting-edge of agentic AI. We build autonomous agents at the frontier of enterprise software, machine intelligence, and human-AI collaboration.
Backed by Insight Partners ($25M Series A) and supported by the Google, NVIDIA, and Microsoft ecosystems, we are one of the fastest-growing AI startups in the country. Our team has already driven over $200M in incremental revenue for customers to date. InstaLILY's architecture has been featured in Google DeepMind's case study showcase.
As a Software Engineer II at InstaLILY, you’ll join a team drawn from top-tier university programs. You’ll develop our AI agents platform and drive technical excellence across the org. You’ll work closely with the Lead Software Engineer and cross-functional teams to design and implement new features and capabilities, and help build a culture of continuous learning as we grow.
This role is client-facing. You’ll build and ship AI agents that operate inside our customers’ systems, and you’ll be in regular working sessions with stakeholders at enterprise customers. You need to code at a high bar and communicate decisions clearly.

Responsibilities

  • Develop InstaLILY’s AI platform and drive technical excellence throughout the organization
  • Work closely with cross-functional teams (product, UI/UX, business development, growth) and key business stakeholders to design and implement new features and capabilities
  • Lead technical discovery with enterprise customers and partner with the Growth team; translate complex real-world workflows into a shipped product.
  • Raise quality and reliability through comprehensive testing and CI/CD practices
  • Build a rapport with the Lead Software Engineer and Head of Product while fostering a culture of continuous learning and improvement
  • Collaborate with the product and design teams to deliver high-quality products that meet customer needs
  • Stay up-to-date with the latest AI and software engineering trends and technologies
  • Mentor junior engineers: pair on hard problems, review code thoughtfully, and help them level up

Requirements

  • Bachelor’s in CS, engineering, math, physics, or related: demonstrated ability matters more than credential
  • 1–3 years as a software engineer (strong candidates have shipped something with real users)
  • Strong fluency in at least one backend language (Python, TypeScript, or similar) and a modern web stack
  • Solid grasp of system design fundamentals (e.g., API design, data modeling, async patterns, caching, and queues)
  • Strong communication: you can explain what you built and why you built it that way to non-technical audiences
  • Strong problem-solving and analytical thinking
  • In-office availability: 5 days/week in our New York or San Francisco office for your first 6 months, then 4 days/week in person with 1 day remote.

Nice to have

  • Production experience with cloud infrastructure (AWS, GCP, or Azure) and CI/CD pipelines
  • AI-serious: you’ve built something with LLMs (a RAG system, an agent, a fine-tuned model, a real integration)

What You’ll Get

  • Proven product: Customers are live; this isn’t a bet on an unproven thesis
  • AI-native: In how we build, how we work, and what we sell
  • Stage: Early enough to shape how the company scales
  • Global: Based in New York with offices in SF and London
  • Culture: Sharp, low-ego team that keeps raising the bar
  • Growth: The learning curve is steep

Compensation and Benefits

  • Salary Range : $120,000 - $140,000 per year, commensurate with experience
  • Equity : Generous stock options awards, and refreshers for top performers
  • Benefits: Medical, Dental, Vision, 401K, in-office Lunch reimbursement, Wellbeing Stipend, Generous Parental leave, PTO and 10 US Federal Holidays, and more!

Join InstaLILY and build autonomous agents that matter. If you want a role where your code ships into real enterprise systems and where you’re in the room with customers, we want to hear from you.

Quality Over Quantity

To ensure a focused, high-quality hiring experience, we kindly ask candidates to limit their applications to 3 open requisitions at any given time. Applying strategically to roles that best align with your skills and career goals gives you the highest chance of standing out. Have you interviewed with us in the past 12 months? We encourage you to reach out directly to your previous interviewer rather than submitting a new application.

Instalily is committed to providing an inclusive and barrier-free recruitment process. If you require an accommodation, please let us know, and we will work with you to meet your needs.

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