Senior Software Engineer (Full Stack)

Ersilia; New York (NY); Hybrid; USD 180,000 - 220,000; Full time

Benefits offered by this job

Competitive equity

Job summary

Ersilia in New York City is seeking a Senior Full Stack Engineer to own greenfield projects across the full stack, from backend to frontend, in a fast-growing AI healthcare startup with real user impact. You should bring 3-5+ years of experience, strong Python and TypeScript expertise, and a track record of building scalable distributed systems.

The role offers hybrid work (4 days in-office in Midtown NYC), visa sponsorship, and competitive equity as part of the compensation package.

Qualifications

• 3+ years of experience in full-stack software engineering with a strong Python foundation.
• 2+ years at an early-stage VC-backed startup.
• BS in Computer Science or Computer Engineering.
• Proficient in TypeScript end-to-end (frontend, backend, and infra).
• Experience building and scaling distributed systems in production.
• Nice to have: experience at a big tech company or tier-one startup.

Responsibilities

• Own and deliver greenfield projects across the full stack (backend, infrastructure, and frontend).
• Evolve and scale backend architecture as the platform grows.
• Build and ship end-to-end features in a TypeScript-first environment on serverless AWS infrastructure.
• Collaborate with the Director of Engineering and founding team with short feedback loops and autonomy.
• Help establish engineering standards and technical culture as an early team member.

Skills

Python

TypeScript

Full-stack

Distributed systems

End-to-end TS

Education

BS in Computer Science or Computer Engineering

Tools

AWS

Serverless architecture

Job description

Job Description

Senior Software Engineer (Full Stack)

Salary: $180K - $220K

Equity: Competitive equity

Hybrid work policy: 4 days in-office in Midtown, New York City (Mon–Thu)

Visa Sponsorship Details: Open to visa transfers(e.g. OPT, H1B transfers)

Hiring Count: Looking to hire2candidatesfor this role

Location: New York City, NY

About this role

We are looking for a Senior Full Stack Engineer with 3-5+ years of experience to join a fast-growing AI healthcare startup and own projects that span the entire stack. You'll be building greenfield products that automate the healthcare recruiting pipeline — from sourcing to onboarding — at a company that's already powering thousands of candidate interactions monthly and scaling to millions. You should have experience at both an early-stage VC-backed startup and a larger tech company, bringing best practices without being rigid. This is a high-ownership role where you'll work closely with the founding team, ship quickly, and see your work in production with real feedback loops the next day.

What will you be doing?

• Own and deliver greenfield projects across the full stack (backend, infrastructure, and frontend) powering Take2's new product suite
• Evolve and scale the backend architecture as the platform grows from thousands to millions of candidate interactions
• Build and ship end-to-end features in a TypeScript-first environment on serverless AWS infrastructure
• Collaborate directly with the Director of Engineering and founding team with extremely short feedback loops and high autonomy
• Help establish engineering standards and technical culture as a key early member of an 11-person team

Why candidates should join

• We build AI agents that automate the entire healthcare recruiting pipeline — from screening interviews to license verifications to job offers. They already power thousands of candidate conversations monthly and are scaling to millions.
• Backed by Human Capital (a $3B fund behind SpaceX) with a $19M Series A raised in under a month. Zero to $4M revenue in 8 months and on track for a Series B by year-end. Board advisors include ex-CHROs of Google, HP, Visa, and Disney.
• Senior full-stack (backend-leaning) role with significant greenfield ownership. $180K–$220K base + competitive equity. Hybrid in NYC (Mon–Thu) with a tight 3-round interview process.

Requirements

Role Requirement

Seniority

• Required: 3+ years of experience in full- stack software engineering, strong foundation in Python

Work experience

• Must have: Building and scaling high- throughput and distributed systems(observability/monitoring and reliability for mission- critical systems)
• Required: 2+ years at an early- stage, VC- backed startup
• Nice to have: Experience at a big tech company or tier- one startup (e. g. , Ramp, Stripe)

Education

• Required: BS in Computer Science or Computer Engineering

Hard skills

• Must have: Proficient in TypeScript end- to- end (frontend, backend, and infra)
• Required: Experience building and scaling distributed systems in production
• Nice to have: Built or deployed AI applications (LLMs, ML pipelines) in production

Soft skills

• Must have: Mission- driven; eager to build from scratch
• Must have: Low ego; changes mind quickly when presented with better arguments

Miscellaneous

• Must have: Based in NYC; able to work in- office Mon–Thu