Senior Full-Stack Engineer - Early-Stage Security Tech Company

Type: Full-time

• On-site
• NYC (Flatiron) Compensation: $180K–$230K + 0.1–0.5% equity Visa sponsorship: Available on a case-by-case basis
  
  
  

About The Company

We are an early-stage, venture-backed company building modern workplace safety infrastructure, where real-time location, AI-native software, and rugged IoT hardware converge to detect issues and deliver help exactly when and where it is needed. Founded in 2024 by a team drawn from leading consumer hardware, technology, and physical-security companies, we already protect schools, universities, and frontline workplaces nationwide, with 10+ live paying customer sites. We are backed by top VCs and closing our Series A, going after a $30B market growing roughly 20% annually that is still dominated by legacy players.

Team size: 15

• Industry: Security, Hardware, AI, B2B
• Office: NYC (Flatiron)
  
  
  

Why Join

• Mission-driven: Protecting 110M American workers — teachers, nurses, hotel staff, and retail workers — across schools, hospitals, hotels, and workplaces.
• Real traction: Hardware coming off real manufacturing lines with 10+ live paying customer sites nationwide.
• Strong pedigree: Engineers from MIT, CMU, Georgia Tech, UPenn, and Princeton.
• De-risked early stage: Closing Series A, with meaningful equity upside at an early but de-risked stage.
• High ownership: A small, flat team means direct influence on architecture, product direction, and technical decisions, with direct access to the founders.
• In-person culture: In-person Flatiron office with in-office meals.
  
  
  

The Role

An early-stage full-stack role working directly with the founders and early engineers to evolve the core platform, shape new features, and scale a system already protecting thousands of people. You will make foundational decisions on architecture, tech stack, and product direction alongside the founding designer as the company expands into new verticals.

What You Will Be Doing

• Building and shipping new features that make the platform more intuitive, reliable, and scalable.

Explore our comprehensive directory of visa sponsorship jobs from employers worldwide who are ready to sponsor talented international professionals.

• Improving core infrastructure to keep the system live and performant.
• Integrating new customers onto the platform.
• Interfacing with customers to understand their needs and translate them into product solutions.
  
  
  

Tech stack: React, TypeScript, AWS

Requirements

• 4–7 years of experience as a full-stack software engineer, with at least 1 year at a startup or scale-up.
• Experience building a product from zero to one, either solo or with significant individual ownership on a team.
• Experience at a high-growth, early-stage startup (Seed to Series D).
• Proficiency with React, TypeScript, and AWS.
• Strong product and design instincts, ideally with a portfolio or examples.

Interested in opportunities specifically in United State? Discover our dedicated Visa Sponsorship Jobs in United State page featuring roles from top employers in this location.

• Degree in Computer Science or a related field.
• At least one clear signal of excellence (e.g., a top school or well-known companies).
  
  
  

Nice to Have

• IoT experience, or experience building software for hardware-connected products.
  
  
  

Interview Process

• Founder Screen (30–40 mins): Conversational interview with the co-founder/CTO covering your background, what drives you, and a walkthrough of past technical work.
• Coding Interview (45 mins): Live coding interview with one of the engineers to assess how you think through problems on the spot.
• On-site (3–4 hours): A mix of behavioral and technical sessions; you will meet members across the software, hardware, firmware, and go-to-market teams, with additional programming and whiteboard questions.
• Offer extended.