Senior Python Software Engineer

Senior Python Software Engineer – Startup - New York City * Visa sponsorship not available, US Citizens only. Please do not apply if you are seeking sponsorship* Senior Python Software Engineer is required by a startup building AI voice and SMS agents for medical services, focusing on dental, ophthalmology, and dermatology. The company has an in-house custom orchestration layer and is experiencing rapid growth with plans to raise more funds soon. The successful candidate will have at least six years of experience, either full stack (Typescript, Python) or backend (Python). You will have a mix of big tech and startup experience, with mentorship background and experience in scalable environments.

Responsibilities

: • Platform development – You will work across our real-time voice platform, customer dashboard, agent runtime, and analytics pipeline. Current projects include scaling our telephony infrastructure to handle billions of calls annually, building out outbound call management and reporting capabilities, and expanding self-serve functionality within the customer UI to support enterprise operations at scale. • Feature ownership – You will own entire product lines end to end, from scoping and architecture through to delivery and iteration. Each workstream you take on represents a minimum of $1M in ARR that is ready to be unlocked; your output will have a direct and measurable impact on the company's growth and fundraising trajectory. Projects include collections agents, OCR document processing flows, permissioning systems, and outbound automation. • Software architecture – You will design and build systems against strict performance and reliability constraints. This means understanding where the current architecture needs to evolve, making principled decisions under ambiguity, and building things correctly from the outset – the foundations you lay will underpin a multi-million-dollar platform. • Forward deployment – Senior engineers at company work closely with customers. You will join customer meetings, develop a deep understanding of how the product is used in practice, and translate that directly into product decisions. The best ratio of impact to effort comes from engineers who are as close to the problem as possible. • Leadership – You will join as an individual contributor with the expectation of growing into a leadership role. The intention is for the engineers hired now to lead the next wave of fifteen or more engineers joining by end of year. Hiring, delegation, and mentorship will become a meaningful part of