Senior Software Engineer

ABOUT ADAPTIVE NVIDIA and OpenAI’s only AI cybersecurity investment. Adaptive is a cybersecurity startup on a mission to stop AI-powered cyberattacks. In December 2025, the company announced an $81M Series B led by NVIDIA and Bain Capital Ventures, with participation from Capital One Ventures, Citi Ventures, and continued support from Andreessen Horowitz (a16z), the OpenAI Startup Fund, and Abstract Ventures. The round marked NVIDIA’s first AI cybersecurity investment. Adaptive was founded by Brian Long and Andrew Jones, repeat entrepreneurs who have built and scaled category-defining companies. Brian and Andrew previously co-founded Attentive, which grew to more than $500M in annual revenue and a $10B+ valuation, and TapCommerce, which was acquired by Twitter. Together, they bring deep experience building high-growth, product-led businesses at massive scale as Adaptive builds the security layer for the AI era. Trusted by leading banks, technology companies, and healthcare organizations, Adaptive protects teams from emerging threats like deepfakes, smishing, and AI-powered voice scams. With rapid enterprise adoption and a $200B+ market ahead, the company is just getting started. ROLE We are seeking a Senior Software Engineer with a passion for developing high-quality software in a high-growth startup environment where every engineer has outsized impact on the product and company. You will own large features end-to-end, make architectural decisions that last, and set patterns that make the whole team faster. This is a role for someone who wants to build, mentor, and shape how we work. RESPONSIBILITIES - Design and deliver large features and systems end-to-end. - Establish patterns that make the whole team faster and the codebase more maintainable. - Drive change proactively — you don't wait for permission or instruction. - Work side-by-side with product and design from day one — roles blur here, and you'll shape the direction of entire projects. - Anticipate future complexity and design systems that scale as fast as the threats we're fighting. - Help us hire — you'll run interviews and help identify great people. QUALIFICATIONS - 5+ years of experience building customer-facing software. - Bachelor's degree or equivalent experience in Computer Science, Software Engineering, or a related field. - Strong development experience with modern, strongly-typed programming languages such as Java, C#, TypeScript, or Go. - Deep understanding of SQL databases, schema design, and optimizing database interactions for performance and scalability. - Experience with frameworks such as Spring Boot and React/Redux. - Understands a full stack end-to-end — from tooling to infrastructure to code to frameworks to architecture. - Experience deploying and operating software in distributed environments (AWS, GCP, Azure). - Demonstrated ability to simplify complex problems and make them approachable to others. - Expert intuition for cost/benefit analysis of proposed scope — knows where to push back to deliver value with practical engineering time. What We Offer - An opportunity to work on a challenging product that will impact millions of people - A culture that promotes continuous learning and growth, with access to resources and mentorship to advance your skills and career. - A supportive, inclusive environment where every team member's contribution is valued. Compensation & Benefits: - Competitive cash compensation and meaningful stock. - Several medical plans to choose from, most covered at 100% by Adaptive. - 401k through Vestwell. - Unlimited PTO, including winter break from Dec 24 - Jan 1. - A fantastic office atmosphere including coffee, espresso, lounge, snacks, whiteboards, and tons of conference space. - Rotating choice of 4 free lunch options from local restaurants every day. - Expense dinner if you’re in the office past 7pm. Expense Uber if you happen to stay past 9pm. Environment This role is located in New York City, and requires the candid