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Jobs
Engineering

Senior Software Engineer

San Francisco, US • Hybrid
Includes:
  • $150K–$300K + 0.25%–0.75% equity
  • Engineering
  • Hybrid
  • Travel to San Francisco for monthly visits
  • 5+ years of Software Development experience

About the role

Our client, a YC-backed startup with a recent $6M seed round, is on a mission to empower non-technical founders to turn ideas into scalable software businesses. Their platform bridges the gap between AI-generated code and production-ready products - delivering not just the build, but the infrastructure, tooling, and go-to-market support to help new companies succeed.

This is a rare opportunity to join a high-caliber founding team (ex-serial founders with a decade of working together) and work on deep, complex engineering problems that make sophisticated tech invisible to end users.

What you’ll do:

  • Design and build full-stack features from scratch - front-end, back-end, infra, and architecture

  • Architect modular, reusable systems that scale

  • Work closely with product and design to ship quickly without sacrificing quality

  • Collaborate with a small, senior team that values high autonomy and zero fluff

  • Keep pace with the latest technologies and contribute to technical direction

  • Take ownership end-to-end - no “just my piece of the stack” mentality

What we’re looking for:

  • 4–10 years’ experience in software engineering, with strong CS fundamentals

  • Proven 0-to-1 product experience (ideally as a Founding Engineer or early hire at a VC-backed startup)

  • Fluency in TypeScript and React (React Native a plus)

  • Experience with AWS, Docker, Postgres, and scalable architectures

  • Ability to operate without heavy reliance on AI coding tools - you can code and architect from scratch

  • Strong communication who thrives in high-autonomy, fast-paced environments

  • Based in or willing to relocate to SF (remote possible for exceptional candidates who can attend 3-day on-site sprints monthly)

Why join?

  • Be part of a high-bar engineering culture - every teammate is senior-level or above

  • Ship products that help thousands of founders bring their ideas to life

  • Competitive comp - salary at the 90th percentile for top performers, plus meaningful equity

  • Work directly with the founders to shape the company’s technical culture

  • No bureaucracy, no layers - just a flat, hands-on team moving fast

If you’re the kind of engineer who loves building from the ground up, hates red tape, and wants to work with an elite team solving ambitious problems, we should talk.

What our clients are saying

We’re proud to be trusted as a recruitment partner by businesses and professionals who value quality and long-term results.

“Ed expertly navigated through our complex hiring process and AI start-up landscape; I could trust he was on top of developments and would keep me updated. I would work with him again in a heartbeat - thanks Ed!”

Robert Ogley

Robert Ogley

Global Product Lead - Wise

“I was wrapping up our annual hiring stats, which prompted me to look across the rest of our team, and did you know that HartleyCo placed 50% of our entire DS/ML/Software team? It's been a real pleasure working with you and look forward to continuing working with you next year. Thanks for your continued support and guidance - and answering all my questions when it comes to writing our job specs and understanding the market better. It's been really helpful. Do send my best wishes and thanks to the wider team - particularly Chris whose patience is never wavering.”

Caroline Thomson

Caroline Thomson

VP of People - LabGenius

Josh has been consistently outstanding always proactive, transparent, and genuinely focused on understanding the unique needs we have at SimCare. What sets Josh apart is his ability to intuitively understand both what we needed and what candidates were looking for, while communicating clearly to align both sides (he's seriously a great communicator). I’m confident that your experience with Josh will be just as exceptional as ours has been. Best

Tiko

Tiko

Co-Founder - SimCare AI (YC S24)

I had an excellent experience working with Charlie from HartleyCo, during our search for engineers in the UK. Charlie took the time to deeply understand not only our technical requirements, but also our company culture, values, and long-term objectives. This thoughtful approach made a real difference in the quality and relevance of the candidates presented to us. Charlie consistently demonstrated strong market knowledge, professionalism, and genuine commitment to delivering the right results rather than just filling roles quickly. The engineers we hired through this partnership have exceeded our expectations and are already making a meaningful impact within our teams, both on a technical and personal level. I truly appreciated the consultative approach and the high level of care shown throughout the process. I would gladly recommend Charlie and HartleyCo as a reliable, knowledgeable, and trusted recruitment partner.

Irina Zozulja

Irina Zozulja

Head of People Operations & Culture

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