Fullstack Engineer, App Platform

Far Coder; Northern (KY); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Health Insurance including Medical/DEx

Work From Home Support

Home office setup allowance

Monthly cell phone & internet stipend

Care benefits

Wellness allowance

Childcare allowance

401k with employer match (US)

Office hubs across major cities

Job summary

Whatnot is seeking a senior Fullstack Engineer for the App Platform, supporting iOS, Android, and Web. This remote role focuses on scalable infrastructure, observable systems, and a shared architecture used by multiple product teams.

You’ll drive backend and frontend work, ensuring performance and reliability across services. You should bring 5+ years of software development, strong React and GraphQL skills, and backend experience with Node or Python and PostgreSQL.

Qualifications

• 5+ years of software development experience with fullstack focus.
• Proficient in React and GraphQL API development.
• Experience with Node.js or Python backend and PostgreSQL.
• Bachelor’s degree in CS or related field or equivalent work experience.

Responsibilities

• Build scalable Web backend services and frontend interfaces.
• Collaborate with product teams to deliver end-to-end features.
• Own projects from inception to production and mentor teammates.

Skills

React experience

GraphQL API development

Fullstack web development

Mentoring others

Education

Bachelor’s degree in Computer Science or related field

Tools

Node.js

Python

PostgreSQL

Next.js

Job description

Whatnot is hiring a remote candidate for Fullstack Engineer, App Platform. This is a full time position. Work location: USA. The role typically involves technologies such as React, Next.js, GraphQL, Python, Rust, Go.

JOIN THE FUTURE OF COMMERCE WITH WHATNOT! Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. Whether it's trading cards, fashion, electronics, or live plants, our sellers are building real businesses across hundreds of categories. We're building live commerce at a scale that's never been done in the West, and there's no playbook to copy. The people here are shaping how an entirely new industry develops.

As a remote co-located team, we're inspired by our values https://www.whatnot.com/careers and anchored in hubs across the US, UK, Ireland, Poland, Germany, and Australia. We move fast, stay close to our users, and focus on the work that drives the most impact. We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer in America by Forbes. Check out the latest Whatnot updates on our news https://blog.teamwhatnot.com/ and engineering blogs https://medium.com/whatnot-engineering and join us as we enable anyone to turn their passion into a business and bring people together through commerce.

ROLE

App Platform is Whatnot's client infrastructure team, building the consistent, reliable foundation that every product team builds on top of across iOS, Android, and Web. Rather than owning a single feature surface, the team pushes technical boundaries so product pods can move fast without sacrificing quality — owning things like app stability and observability, the Whatnot Design System, localization, core components, and the shared architecture that keeps our apps performant and consistent at scale.

As an Fullstack Engineer on App Platform, you'll focus on the infrastructure and building blocks that feature teams rely on: scaling our Web backend services, strengthening our networking and persistence layers, improving our client testing harnesses, driving app stability and crash reduction, and partnering closely with product teams to make sure the "right way" to build is also the easiest way. It's a high-leverage role for someone who wants their work to compound across the entire app rather than a single feature.

We offer flexibility to work from home or from one of our global office hubs, and we value in-person time for planning, problem-solving, and connection. Team members in this role must live within commuting distance of our New York, Seattle, San Francisco or Los Angeles hub. This is a strong fit for an engineer who enjoys shipping product-facing platform work, cares deeply about user trust and message quality, and is excited by the challenge of building systems used by many teams across the company. Team members in this role must live within commuting distance of our New York or Seattle hub.

YOU

People who do well at Whatnot tend to be comfortable figuring things out as they go, biased toward action, and genuinely curious about what they're building. They care more about outcomes than credit and stay close to the product and the people using it.

As our next Fullstack Engineer you should have 5+ years of software development plus: Bachelor’s degree in Computer Science, a related field, or equivalent work experience. Web development experience with React, using GraphQL for API development, and modern frontend applications (exposure to Next.js framework is not required but preferred). Backend expertise: Proven track record of building end-to-end high-scale product experiences as a fullstack engineer. Experience with Node or Python on backend, and/or Postgres databases is a plus. Excellent product instincts—you first think about users rather than the best technical solution. Care deeply about the craft of software engineering, maintaining systems at scale, and how to balance the productivity and velocity of teams while maintaining a high quality end‑user experience. You can mentor others, and prioritize building inclusive, supportive teams. Contribute to team-wide ownership of production health, incident response, and continuous improvement of platform reliability. Project owner—you’ve strong ownership instincts and can own projects from inception to production and beyond. You are known for shipping products and features lightning-fast. You’re an excellent problem solver and can operate autonomously. Ability to pick up on new technologies very quickly. Proven track record of delivering features.

BENEFITS

• Generous Holiday and Time off Policy
• Health Insurance options including Medical, Dental, Vision
• Work From Home Support
• Home office setup allowance
• Monthly allowance for cell phone and internet
• Care benefits
• Monthly allowance for wellness
• Annual allowance towards Childcare
• Lifetime benefit for family planning, such as adoption or fertility expenses
• Retirement; 401k offering for Traditional and Roth accounts in the US (employer match up to 4% of base salary) and Pension plans internationally
• Monthly allowance to dogfood the app

EOE

Whatnot is proud to be an Equal Opportunity Employer. We value diversity, and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, parental status, disability status, or any other status protected by local law. We believe that our work is better and our company culture is improved when we encourage, support, and respect the different skills and experiences represented within our workforce.

Skills required for this role include React, Next.js, GraphQL, and related tools for day-to-day development.

Seniority level: Senior.