Senior Backend Software Engineer (Node.js, USA-based)

About CollectlyCollectly is a fast-growing healthcare technology startup working to modernize the U.S. healthcare financial experience through AI-driven automation. Every day, millions of patients and providers navigate a system weighed down by inefficiencies, administrative burden, and confusing billing processes. The result is more work for provider offices and more confusion and frustration for patients.Collectly applies artificial intelligence to revenue cycle management (RCM) to automate workflows, streamline billing, and create clearer, more humane financial experiences for patients. Our work focuses on real, high-impact problems: accelerating cash flow for providers, reducing operational overhead, and improving patient interactions during critical non-clinical moments.By simplifying billing and payment experiences, we help healthcare organizations focus on what matters most: delivering care.We’re a hybrid team, with roots in Santa Monica and teammates distributed across the U.S. and Europe.The RoleAs a Senior Software Engineer, you will be part of the talented team building new AI products at Collectly, powered by Node.js backend and React front end.We are a hybrid company, based in Santa Monica and San Francisco, USA. With some remote across the United States & Europe. As a member of the engineering team, you will:Collaborate with the founders, PMs, designers, and other engineers to navigate trade-offs and build world-class products.Work with urgency to build critical features with a keen attention to detail and high-quality maintainable code.Completely own your features end-to-end, from product requirements, code, testing, observability, rollout and maintenance. Must-haves5+ years experience building complex web apps(focused on backend).Experience with LLM Prompt Engineering.Strong proficiency in Typescript, Node.js, SQL databases and modern backend architectures.Experience (or strong interest) in AI/LLMs in prompt engineering.AWS or GCP Cloud Infrastructure Experience.Experience building rapid prototypes 0->1, and convert to robust maintainable code Nice-to-haves:Experience with orchestration tools. ie. Hatchet, temporal.AI/LLM Integrations.Puppeteer, stagehand, selenium experience.1+ years of experience with Python (be able to read this code)React (5% of work). This position is mostly backend, but will require understanding frontend code. How We Work:Start with a 1–2 week onboarding onsite in Los Angeles/Santa Monica with our CTO — travel and accommodations fully covered.After onboarding, you’ll work remotely with the freedom and flexibility that comes with it.Join a collaborative and supportive team that values high-quality code, continuous improvement, and having fun while doing meaningful work.Note: At this time, we are unable to provide visa sponsorship. Perks and BenefitsUnlimited PTO: We believe in work-life balance and encourage you to recharge when you need it.Comprehensive Health Coverage: Fully paid medical, dental, and vision insurance for you and your dependents, because your well-being matters to us.Equity Opportunities: Share in our success with stock options - your hard work will drive our growth.Retirement Planning Made Easy: Enjoy a 401(k) with a generous company match to secure your future.Student Loan Support: We help lighten the load with contributions toward your student loans.Base Compensation Range: $150,000 - $180,000 per year