Senior Backend Engineer II - eCommerce

Prenuvo; San Francisco (CA); On-site; USD 175,000 - 190,000; Full time

Benefits offered by this job

Proactive healthcare for everyone

Whole-body scans for employees

Flexible vacation policy

Commuter benefits

401(k) retirement plan (no match)

Health, dental, and vision coverage

Job summary

Prenuvo in San Francisco is seeking a Senior Backend Engineer II for the eCommerce team. You will design and scale APIs powering checkout, payments, scheduling, and customer accounts with Python, FastAPI, and PostgreSQL, contributing to platform reliability and growth.

You will collaborate with Product and Design, mentor engineers, and own features end-to-end. Note: this role does not provide visa sponsorship; applicants must be legally authorized to work in the United States.

Qualifications

• 7+ years of backend software engineering experience with Python.
• Strong experience building REST APIs with FastAPI, Flask, or Django.
• Deep knowledge of PostgreSQL, including schema design and query optimization.
• Experience building distributed systems and integrating with external APIs.
• Hands-on with AWS and modern CI/CD practices.
• Strong testing with pytest and reliable automated test suites.

Responsibilities

• Build and maintain scalable backend services powering the online booking experience.
• Design and maintain APIs for checkout, payments, scheduling, accounts, and orders.
• Integrate with Stripe, CommerceTools, Salesforce, Voucherify, and other systems.
• Design resilient distributed systems with observability and monitoring (Datadog).
• Optimize performance and reliability for high-volume workloads.
• Write automated tests and promote quality culture.
• Collaborate with Product, Design, and other engineering teams on features.
• Mentor engineers, participate in architecture discussions, drive technical direction.

Skills

Python

FastAPI

REST APIs

PostgreSQL

Distributed systems

AWS

CI/CD

Testing (pytest)

Datadog

Mentoring

Tools

SQLAlchemy

Pydantic

Terraform

Docker

GitHub Actions

Stripe

Job description

About Us

At Prenuvo, we are on a mission to flip the paradigm from reactive "sick-care" to proactive health care. Our award-winning whole body scan is fast (under 1 hour), safe (MRI has no ionizing radiation), and non-invasive (no contrast). Our unique integrated stack of optimized hardware, software, and increasingly AI, coupled with the patient-centric experience across our domestic and global clinics, have allowed us to lead the change against "we caught it too late again".

About Us

At Prenuvo, we are on a mission to flip the paradigm from reactive "sick-care" to proactive health care. Our award-winning whole body scan is fast (under 1 hour), safe (MRI has no ionizing radiation), and non-invasive (no contrast). Our unique integrated stack of optimized hardware, software, and increasingly AI, coupled with the patient-centric experience across our domestic and global clinics, have allowed us to lead the change against "we caught it too late again".

We're looking for a Senior Backend Engineer II to join our eCommerce team, building the services that power our online booking platform. You'll design and scale APIs that support checkout, payments, scheduling, customer accounts, and third‑party integrations across multiple countries. This is a high‑impact role where you'll help build reliable systems that directly influence platform stability, transaction success, and business growth. If you enjoy solving complex distributed systems problems, building resilient backend services, and owning features from design through production, we'd love to hear from you.

This role does not provide visa sponsorship. Applicants must be legally authorized to work in the United States at the time of hire and must not require employer sponsorship for a work visa (current or future).

Help reshape the world through proactive healthcare while working with cutting‑edge technology and high‑performing teams with deep expertise - join us to make a difference in people's lives!

What You'll Do

• Build and maintain scalable backend services using Python, FastAPI, and PostgreSQL that power our online booking experience.
• Design and maintain APIs supporting checkout, payments, scheduling, customer accounts, and order management.
• Integrate with third‑party platforms including Stripe, CommerceTools, Salesforce, Voucherify, and other business‑critical systems.
• Design resilient distributed systems with robust error handling, observability, and monitoring using Datadog.
• Optimize application performance, database queries, and service reliability for high‑volume transactional workloads.
• Write comprehensive automated tests and contribute to a strong engineering culture focused on quality and reliability.
• Partner closely with Product, Design, and other engineering teams to deliver customer‑facing features.
• Mentor other engineers, participate in architecture discussions, and help drive technical direction across the platform.

What You'll Bring

• 7+ years of professional backend software engineering experience with Python.
• Strong experience building REST APIs with frameworks such as FastAPI, Flask, or Django.
• Deep knowledge of relational databases, particularly PostgreSQL, including schema design and query optimization.
• Experience building and maintaining distributed systems and integrating with external APIs.
• Hands‑on experience with cloud platforms such as AWS and modern CI/CD practices.
• Strong testing practices using frameworks such as pytest, with experience building reliable automated test suites.
• Experience with monitoring and observability tools such as Datadog or similar platforms.
• A startup mindset: comfortable with ambiguity, able to balance speed with quality, and willing to take ownership from design through production.
• Excellent communication skills and the ability to collaborate across engineering and business teams.

Nice to Have

• Experience with headless commerce platforms such as CommerceTools.
• Experience with payment systems including Stripe, affirm, or similar providers.
• Experience with SQLAlchemy, Pydantic, and asynchronous Python development.
• Familiarity with Terraform, Docker, and GitHub Actions.
• Experience with scheduling platforms, subscription systems, or healthcare applications.
• Experience working in highly regulated industries.

Our Values

First: we are Pioneers

• Transforming healthcare requires divergent thinking, bias for action, disciplined experimentation, and consistent grit and determination to maintain momentum. This journey is as challenging as it is rewarding.

Second: we are Platform-Builders

• We're always building foundations that allow us to achieve tomorrow more than we did today. We never lose sight of what's ahead – in a mindset of ownership and duty to our mission.

Above all: we are Patients

• We could all be the next person who walks through our very doors, seeking clarity or peace of mind. We are proud of our impact on our patients' lives, and we won't stop till everyone can benefit from our work.

What We Offer

• An avenue to make a positive impact on people's lives and their health
• We believe in preventative healthcare for everyone, including our team - Prenuvo provides free, whole-body scans to each team member
• Growth opportunities are at the heart of our people journey, we're doing big things with bright minds - there is no single path to success, it can be shaped along the way
• Building strong relationships is at the core of everything we do - our team gets together each week to connect, share, and socialize
• Recognizing time away to restore is vital to our wellbeing - we have a flexible vacation policy and we will encourage you to use it
• We now offer the Prenuvo's Commuter Benefits Plan to help cover your transit and parking costs. Whether you ride, drive, or park, we've got you covered—making your commute easier and more affordable!
• Prenuvo offers a 401(k) retirement savings plan to eligible employees, allowing team members to make pre‑tax contributions toward their retirement. While Prenuvo facilitates access to the plan, the company does not currently offer matching contributions.
• We offer a comprehensive benefits package including health, dental, vision, including Mental Health coverage, to support you and your family
• The base salary for this role is $175,000 to $190,000 in local currency, depending on experience and geographic location

We are an equal‑opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

As part of the hiring process, successful candidates will undergo a background check in compliance to applicable federal, provincial, and state rules.

Please be advised that official communication from our recruitment team will only come from our authorized domain [prenuvo.com]. If you are contacted by a recruiter, please ensure their email address ends with @prenuvo.com. We do not use third-party recruitment services or any other email domains for hiring purposes. If you receive communication that you believe to be fraudulent, please report it immediately to [e-mail].