Software Engineering Intern - Summer 2026 (Hybrid @ Bellevue, WA)

About the Role

OfferUp is looking for a Software Engineering Intern to join our engineering team this summer. You'll be embedded on one of our engineering teams; building the systems and experiences that help millions of buyers and sellers connect, transact, and build trust every day. Wherever you land, you'll write production code that real users (and other engineering teams) depend on, with teams that move quickly and ship often.

This is a hybrid role based in our Bellevue, WA office. You'll spend 3 days a week in the office, working alongside engineers, product managers, and designers to ship meaningful work in a fast-moving environment.

You won't be on the sidelines. From day one you'll own real engineering work, pair with senior engineers, and use modern AI tooling to ramp up quickly and move with the pace of the team.

What You'll Do

• Ship real code: Design, build, and ship features that run in production and reach real users, not throwaway prototypes.
• Own a meaningful problem: Take a defined piece of work from design through delivery, with the support of your engineering manager and teammates.
• Build across the system: Develop and improve the services, APIs, and experiences that power OfferUp, and learn how the pieces fit together end to end.
• Move fast and do spike work: Investigate open-ended problems, prototype solutions, and turn technical spikes into clear recommendations the team can act on.
• Leverage AI tools: Use tools like Claude and Gemini to ramp up faster, navigate the codebase, accelerate spike work, and raise the quality of what you ship.
• Collaborate across the team: Work closely with engineers, product managers, and designers to turn ambiguous requirements into shipped, well-tested features.
• Care about quality: Write tests, participate in code reviews, and help keep our systems observable, reliable, and maintainable.
• Present your work: Share what you built and what you learned with the broader engineering and product teams at the end of your internship.

Who You Are

• A builder who likes to ship: You're motivated by getting working software into users' hands and iterating quickly.
• Strong on fundamentals: You understand data structures, algorithms, and how software systems are designed, and you can reason about how your code behaves in the real world.
• A strong communicator: You can explain a technical decision clearly: in a design doc, a pull request, or a room full of engineers.
• A self-starter: You don't wait to be told what to do next. You take initiative, ask good questions, dig into the codebase, and figure things out.
• Energized by a fast pace: You're comfortable with ambiguity and change, and you do your best work on a team that moves quickly.
• Currently enrolled in an undergraduate or graduate (or equivalent) program, returning to school after the internship.

Helpful, but not required

• Prior internship or project experience building software in a team setting.
• Familiarity with Java or a similar programming language.
• Exposure to cloud platforms, databases, APIs, or distributed systems.
• Experience with two-sided marketplaces, mobile apps, or large-scale consumer products.
• Comfort using AI coding assistants as part of your day-to-day workflow.

Compensation: The hourly rate for this internship is $48 – $56. Placement within this range reflects academic level (undergraduate vs. graduate), relevant technical experience, and demonstrated proficiency in applicable tools.

This is a non-benefits-eligible internship. No additional compensation beyond hourly wages is offered.