Remote Freelance Full Stack Developer Jobs in Federal Way, WA

About the role:
The OfferUp Business team owns the platforms that power every business vertical on our marketplace; Storefronts, Auto Dealers, Services, Rentals, and Jobs. Our customers aren't casually browsing; they're running businesses on top of what we build, so every feature we ship has a direct, measurable impact on their livelihood and on OfferUp's revenue. We operate the full stack end-to-end: including microservices that handle some of the highest RPS and TPS in the company, and integrations with partners like Stripe and Shopify. We move fast, instrument everything, and treat experimentation as a first-class part of the workflow. We've barely scratched the surface of what these verticals can become, and the roadmap is wide open for someone who wants to shape it.
At many organizations, your role begins and ends with the code. On our team, we're different. You own a feature from concept to fruition. Your responsibilities will include everything from writing well architected and thoroughly tested code, to rolling out the feature by analyzing metrics. You also get to take ownership beyond your technical area by working with cross-functional team members.
As a Staff Software Engineer on the Business team, you'll be both a hands-on builder and a technical leader. You'll set the technical direction for the team, ship high-impact features with strong operational rigor, raise the bar on engineering quality across the org, and find creative ways to unlock new business surfaces.
Here's more of what you will get to do:

• Define the multi-quarter technical roadmap for the Business team and align it with company priorities
• Design and operate high-throughput microservices where reliability, latency, and observability are non-negotiable
• Work collaboratively with cross-functional teams to design and implement new features across all five business verticals
• Communicate complex technical designs to both technical and non technical stakeholders
• Collaborate with engineering teams across OfferUp to surface common pain points, develop solutions, and evangelize best practices
• Drive experimentation strategy, design A/B tests, interpret results, and use data to decide what ships
• Make pragmatic calls on what to refactor, replace, or leave alone, and bring the team along on the reasoning
• Support, mentor, and grow other engineers on the team
• Partner deeply with Product, Design, and Business stakeholders to drive features and assess timelines
• Participate in a reasonable on-call rotation with the rest of the team
• Help maintain code quality across our existing applications
• Create solutions and frameworks that make the rest of the team better and faster
• Champion the use of AI tooling across the team. From day-to-day coding assistants to agentic workflows for testing, code review, and operational tasks. Help define the guidelines and best practices that scale these tools across OfferUp engineering
• Become an SME for the team's areas of ownership

You'll thrive in this role if you have:

• 8+ years of professional software engineering experience
• Experience building and operating data-driven applications at scale
• Experience performing data analysis and translating results into business recommendations
• Hands-on experience using AI coding tools (Claude Code, Cursor, Copilot, or similar) in a production engineering workflow, with a point of view on where they accelerate work and where they don't
• Experience using good judgment to balance engineering improvements with business needs
• Experience developing both short- and long-term technical vision for a set of services or features
• Experience guiding and mentoring other engineers
• Strong Java skills (required) and fluency in any other modern language; deep grounding in OOP, microservices, and distributed-systems design
• Hands-on experience designing and building microservices and scalable distributed systems
• Strong knowledge of data structures and object-oriented design
• Hands-on experience with load balancing and handling large traffic volumes
• Experience with AWS or other cloud infrastructure
• A bias toward shipping, learning from production, and iterating quickly
• BS or MS in Computer Science, or equivalent practical experience

Helpful, but not required:

• Full-stack experience with React, TypeScript, and GraphQL
• Experience with payment integrations (Stripe or similar) and third-party platform integrations (Shopify, marketplaces)
• Experience with A/B testing platforms (Statsig, LaunchDarkly, Optimizely) and analytics warehouses (BigQuery, Snowflake)

Compensation Range: $210,000 - $240,000
OfferUp offers a comprehensive compensation and benefits package where you'll be rewarded based on your performance and recognized for the value you bring to the business. Individual salaries within our ranges are determined through a variety of factors, including but not limited to education, experience, knowledge, skills, and geography. All roles will receive equity in OfferUp as part of their compensation, the amount of equity varying depending on the individual's level and experience.
Benefits (all US roles): In addition to our compensation package, this role is eligible to enroll in health insurance, healthcare savings and spending accounts, retirement savings benefits (401(k) plan with match), basic and voluntary life insurance, disability benefits, and paid time off for sick leave, family and/or medical leave, vacation, and 12 company holidays. In regard to vacation time, OfferUp has a flexible vacation policy, and, in general, full-time, exempt employees will be expected to take 3-5 weeks (15-30 days) of pre-planned vacation time per year. Vacation needs are flexible and will naturally vary from year to year based on individual circumstances and business needs. In regard to sick time, all full-time employees (exempt and non-exempt) will be granted 12 days (96 hours) of sick time per year (pro-rated if the start date is other than January 1). Your recruiter can share more details about specific benefits during the interview process.
About OfferUp:
OfferUp is dedicated to creating the simplest and most trusted way for people to buy, sell, and connect in their local communities. One of the top local marketplace apps for local buyers and sellers in the U.S., OfferUp makes it easy for people to discover more of what they need-from great deals and secondhand goods to jobs, services, home rentals, and more-right in their own communities. Our trusted platform empowers millions to connect, thrive, and move life forward.
Available on iOS and Android, OfferUp has consistently ranked among the top shopping apps. Founded in 2011 and based in Bellevue, WA, OfferUp serves local markets nationwide and was used by more than 1 in 6 adults in the U.S. in 2024. OfferUp is backed by leading investors, including Andreessen Horowitz, Warburg Pincus, GGV Capital, T. Rowe Price, and Coatue Management. https://about.offerup.com
More About OfferUp At a Glance

• Top 10 Shopping app in the App Store and Google Play Store for three years
• 15%+ of adults in several major markets use OfferUp every month (LA, Miami, Phoenix, Seattle, Las Vegas, Riverside, Orlando)
• OfferUp works directly with nearly 2000 US law enforcement agencies to build trust in local communities

OfferUp is unleashing the power of local, and we've built a dynamic team to do it. To learn more about working at OfferUp, check out https://about.offerup.com/people
OfferUp provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, or genetics. In addition to federal law requirements, OfferUp complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, transfer, leaves of absence, compensation, and training.
OfferUp expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. Improper interference with the ability of OfferUp's employees to perform their job duties may result in discipline up to and including discharge.