Senior Software Engineer (Backend-Focused Fullstack)

StartupTAP•Seattle, WA

16h•$190,000 - $210,000•Hybrid

About The Position

Our client is a high-growth PropTech company transforming how the residential rental market operates. Their platform streamlines the entire rental lifecycle, from applications and screening to payments and property management, serving agents, property owners, and renters across the country. Founded by entrepreneurs who experienced firsthand the inefficiencies in the rental process, they've built a comprehensive digital solution that's now trusted by millions of users nationwide. With strong venture backing and consistent year-over-year growth, they've established themselves as a category leader in the single-family rental technology space, partnering with hundreds of major real estate organizations nationwide. We're hiring a Senior Software Engineer to drive development of core product features that directly impact millions of users. You'll own technical initiatives from concept through launch, building scalable backend systems and polished user experiences. This role balances hands-on engineering with technical leadership. You'll architect solutions, ship production code, and help mentor the engineering team as the company continues scaling. This is a hybrid position (2 days/week onsite) based in Seattle, WA.

Requirements

5+ years of professional software engineering experience with a track record of leading significant projects
Strong backend development skills with Java/Kotlin (SpringBoot), Node.js, or similar server-side frameworks
Experience designing and building REST/GraphQL APIs
Proficiency with databases (MongoDB, PostgreSQL, or similar)
Solid frontend capabilities with React, TypeScript, and modern JavaScript
Proven ability to ship complete features end-to-end in production environments
Strong product thinking and focus on user experience
Excellent at collaborating across teams and communicating technical decisions
Comfortable in fast-moving environments where priorities shift
Experience mentoring other engineers

Nice To Haves

Background working with high-traffic consumer applications
Experience with cloud infrastructure and scalability challenges
Familiarity with A/B testing, analytics, and data-driven product development
Knowledge of CI/CD practices, monitoring tools, and production operations
Previous work in fintech, PropTech, or marketplace platforms

Responsibilities

Own and deliver major features across the full stack, from database design through frontend implementation
Lead technical architecture decisions for backend systems and APIs
Build high-performance APIs that support millions of transactions
Design data models and services for complex business workflows
Scale systems to handle growing user demand and transaction volume
Create seamless user experiences across web platforms
Ensure security and compliance in a fintech environment
Partner with product and design teams to turn user needs into elegant, scalable technical solutions
Drive complex projects from planning through production deployment
Set engineering standards and contribute to the team's technical direction
Mentor engineers and help build a strong engineering culture focused on quality and growth
Make smart tradeoffs between shipping quickly and building for the long term
Improve backend infrastructure, testing approaches, and system reliability
Optimize system performance and reliability