Senior Software Engineer

About the role We're building enterprise-grade AI, and we need a Senior Software Engineer to be the technical anchor of a growing team. You'll design and ship the agentic systems that make our product work at scale, set the engineering bar for everyone around you, and stay close enough to the research frontier to bring the best ideas into production. This is a high-ownership role for someone who wants their work to define how the team builds. What You'll Do Build robust AI systems | Design and ship testable, production-grade agentic AI systems that hold up at enterprise scale Lead by example | Serve as the lead IC and technical standard-bearer for a growing backend AI team — through code, design reviews, and mentorship Push the state of the art | Research emerging techniques and translate them into practical, reliable engineering practices Design lean systems | Extend and evolve our services while keeping complexity low and the codebase maintainable Who You Are Formal background in CS or a related technical discipline (MS a plus) 5+ years of professional backend engineering experience Deep expertise in Python and its ecosystem (FastAPI, Flask, or similar) Experience with agent orchestration frameworks (LangGraph, LlamaIndex, or similar) A craftsperson who writes elegant, well-tested code — with or without AI assistance A strong systems designer with hands-on AWS experience Comfortable moving fast in ambiguous situations that require clear communication Excited to work in person at our NYC office 3+ days per week The base salary range for this position is $190,000 to $210,000. Base pay offered may vary depending on job-related knowledge, skills, and experience. In addition to base salary, we also offer competitive equity and benefits packages. About Adonis Adonis is the leading AI orchestration platform for healthcare revenue cycle management (RCM), purpose-built for healthcare organizations seeking to transform their revenue operations. Traditional RCM processes often struggle with inefficiencies, costing providers up to 15% or more of their potential revenue. Through advanced automation, data science, and AI Agents, Adonis helps revenue teams detect vulnerabilities, optimize workflows, and deploy precise solutions that drive reliable and scalable financial outcomes. Adonis is headquartered in New York City and has raised over $95M in funding, including a recent $40M Series C round led by Quadrille Capital with continued support from existing investors such as General Catalyst and Bling Capital. This funding supports our mission to restore sanity to RCM and equip provider groups and health systems with AI-driven revenue cycle operations at scale. Compensation Philosophy Actual base pay will depend on job-related knowledge, skills, and experience. Adonis determines compensation based on each candidate’s experience and qualifications relative to peers, and most new hires fall near the middle of the range. In addition to base salary, you’ll receive meaningful equity and great benefits. Perks at Adonis Competitive equity packages Employer-paid medical insurance Employer-paid dental insurance Employer-paid vision insurance Employer-funded HSA Parental leave Commuter benefits Office lunches every day Office snacks Generous PTO Located in 3 World Trade Center with easy access to all trains and the PATH, and amazing views of the city Adonis is proud to be an equal-opportunity employer. We are committed to building a diverse and inclusive culture that celebrates authenticity to win as one. We do not discriminate on the basis of race, religion, color, national origin, gender, gender identity, sexual orientation, age, marital status, disability, protected veteran status, citizenship or immigration status, or any other legally protected characteristics. At Adonis, we fully comply with the Americans with Disabilities Act (ADA). We are dedicated to embracing challenges and creating an accessible, inclusive workplace for all individuals.