This range is provided by Evolve Group. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $300,000.00/yr - $400,000.00/yr Direct message the job poster from Evolve Group Headhunter across Quant Engineering & Algorithmic Trading Founding Senior Software Engineer (Frontend / Fullstack) A hypergrowth AI startup backed by YC is hiring founding engineers to help shape the infrastructure behind its next-generation voice AI platform. This product is already powering real-time conversations for enterprise customers in sales, support, and retention workflows, millions of interactions, and growing. As one of the first engineering hires, you’ll work across the stack (or specialise in frontend) to design and ship features that go directly into production. Whether it’s building beautiful call-flow editors, architecting new APIs, or designing distributed backend systems, you’ll be at the centre of high-impact, greenfield projects with clear business outcomes. What You’ll Do Frontend: Build intuitive dashboards and interfaces for real-time call management, analytics, and agent configuration using modern frameworks like React. Fullstack: Own features end-to-end across the stack—think GraphQL APIs, backend services, deployment pipelines, and frontend UI. Architecture: Help define the technical architecture and scalability roadmap for a fast-growing, high-throughput voice AI platform. Iteration & Launch: Work closely with founders, product, ML, and GTM teams to quickly prototype, refine, and launch customer-facing features. Founding Ownership: Influence culture, engineering practices, and hiring as part of the founding team. What We’re Looking For 3–15 years of software engineering experience (fullstack or frontend) Strong fluency in React (or similar), Python/Node, GraphQL, or equivalent modern web stack CS/EE/CE degree from a top-50 university Excited by early-stage company building, fast iteration, ambiguity, and ownership Bonus: Background in real-time systems, voice/audio, WebRTC, or streaming UIs Why You’ll Love It Greenfield Engineering: Your code will directly power enterprise AI agents used in real conversations, no legacy, no bureaucracy. Massive Scope: Join a company that hit $10M ARR in year one and is just getting started. Every feature you ship will have direct revenue and product impact. Founder Access: Work shoulder-to-shoulder with technical founders and shape the engineering culture from day one. Perks: Competitive comp, meaningful equity, 100% covered health/dental/vision, catered meals, wellness stipends, and visa support (H-1B, green card). Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Engineering, Sales, and Research Industries Engineering Services and Design Services Referrals increase your chances of interviewing at Evolve Group by 2x Inferred from the description for this job Medical insurance Vision insurance 401(k) Paid maternity leave Child care support Pension plan Paid paternity leave Disability insurance Student loan assistance Tuition assistance Get notified about new Software Engineer jobs in San Francisco Bay Area . San Francisco, CA $160,000 - $180,000 1 day ago Software Engineer, AI Intern (Fall 2025) San Francisco Bay Area $57 - $61 2 weeks ago San Francisco, CA $130,000 - $238,000 2 weeks ago San Francisco, CA $145,000.00 - $230,000.00 2 weeks ago Mountain View, CA $125,400.00 - $188,100.00 2 weeks ago Software Engineer, AI Platform - New Grad San Francisco, CA $220,000.00 - $350,000.00 2 weeks ago San Jose, CA $130,000.00 - $180,000.00 2 weeks ago San Francisco, CA $130,000.00 - $140,000.00 2 weeks ago Software Engineer (L4), Content & Business Products Software Engineer, Frontend (All Levels) San Francisco, CA $150,000.00 - $220,000.00 2 weeks ago San Francisco, CA $150,000.00 - $230,000.00 2 months ago San Francisco, CA $105,600.00 - $198,000.00 3 days ago Full Stack Software Engineer - Post-training San Francisco, CA $150,000.00 - $283,000.00 2 weeks ago (General Hire) Software Engineer Graduate (Advertisement Team) - 2025 Start (BS/MS) San Jose, CA $113,500.00 - $250,000.00 2 weeks ago Full Stack Software Engineer (L4), Product Localization Engineering New Grads 2025 - Software Engineer, Algorithm San Jose, CA $120,000 - $165,000 9 months ago San Francisco, CA $130,000 - $240,000 2 days ago San Francisco, CA $140,000 - $195,000 3 days ago Palo Alto, CA $152,400 - $228,700 2 weeks ago San Francisco, CA $125,000 - $175,000 3 weeks ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr Evolve Group
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