Senior Product Engineer, React Native + Backend (Contract)

About Base
Base is a platform for in-real-life social connection and community. Our Members are accomplished people who have built careers, families, and reputations. They come to Base for what their calendars are missing: regular, in-person time with peers they actually want to know. The gathering is the product.
The systems that make it possible are what this role exists to protect.

Engagement
Contract: 2 to 4 week paid audit, with the option to extend into implementation.

About the Role
We are looking for a senior, hands-on engineer to audit and stabilize a consumer mobile product and its internal admin tool, HomeBase. The current system spans React Native, TypeScript, backend APIs, database-driven booking and payment workflows, notifications, and Metabase reporting. This is not a greenfield build. We need someone who can quickly understand an existing codebase, identify architectural and execution risks, separate real problems from noise, and produce a practical recovery plan.

What You'll Do

• Audit the React Native and TypeScript mobile app and the related HomeBase admin flows

• Review backend and API structure, database models, and the business logic around bookings, guests, cancellations, refunds, credits, and notifications

• Identify technical debt, broken workflows, security risks, stale code, and missing tests

• Review Linear and project artifacts, and compare planned work against actual implementation

• Produce a prioritized technical recovery plan

• Ship or supervise one small but meaningful stabilization fix during the engagement

• Recommend the exact team needed to continue: mobile, backend, data, QA, design, or fractional CTO
  

Must Have

• Senior or staff-level experience with React Native and TypeScript

• Strong backend experience with APIs and relational databases

• Experience with payments, refunds, booking systems, marketplaces, memberships, or operational and admin tooling

• The ability to read messy code and make judgment calls quickly

• Strong written communication: you can explain risks clearly to a non-technical founder or operator

• Comfort working without perfect specs
  

Nice to Have

• Experience with Metabase or analytics cleanup

• Experience migrating away from NativeBase, NativeWind, or inconsistent styling systems

• Experience with mobile release pipelines, QA automation, push notifications, and email workflows

• Prior startup rescue, code audit, or fractional CTO experience
  

First Deliverables
Within 5 business days:

• Codebase map: frontend, backend, database, integrations

• Top 10 technical and product risks

• What is broken versus merely messy

• Estimate to stabilize HomeBase

• Hiring plan for the next 30 to 60 days
  

Within 2 to 4 weeks:

• Recovery roadmap

• Technical debt triage

• Recommended architecture changes

• Test and QA priorities

• One shipped stabilization improvement, or a verified implementation plan
  

Details
Type: Contract (2 to 4 weeks, option to extend) Location: Remote, US Compensation: Candidate-proposed hourly or weekly rate Eligibility: Eligible to work in the US

How to Apply
Apply through the link below. You will be asked to share work samples, relevant experience, your availability, and your rate, plus answer one short screening question.
Base is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status.