Developer Experience Engineer United States / Remote / Full-time

Sellrbox; Northern (KY); Hybrid; USD 150,000 - 200,000; Full time

Job summary

Sellrbox is seeking a Developer Experience Engineer to improve our internal tooling, streamline integrations with marketplace APIs, and boost engineering productivity.

You will work across our Astra advertising intelligence engine and data pipelines, writing clear docs, shaping API surfaces, and building CI/CD infrastructure.

Qualifications

• Experience building internal developer platforms and tools.
• Strong ability to document complex systems clearly.
• Proven track record shipping internal tooling for developer teams.

Responsibilities

• Own and improve internal tooling to accelerate deployments.
• Build and maintain marketplace integrations across Amazon SP-API, Advertising API, Walmart, etc.
• Write and maintain documentation that engineers actually read.
• Design internal API surfaces with clean interfaces.
• Build CI/CD and testing infrastructure to enable rapid, safe shipping.
• Instrument and measure developer productivity to identify friction.

Skills

Developer ergonomics

Documentation writing

API integrations

REST APIs

GraphQL

Platform engineering

CI/CD

Tools

SP-API

Advertising API

Webhooks

Job description

Sellrbox builds AI-powered seller tools in-house, and the quality of our internal and external developer experience is what lets us ship fast. We're looking for a Developer Experience Engineer to improve our toolchain, streamline integrations with marketplace APIs, and make our engineering team more productive.

You'll work across our platform, from Astra's advertising intelligence engine to our marketplace data pipelines, ensuring that our internal tools are well-documented, our APIs are clean, and our integrations with Amazon, Walmart, and other platforms are rock-solid.

This is a role for someone who thinks deeply about developer ergonomics and has strong opinions about what makes a great internal platform. You'll ship code, write docs, and shape how our engineering team builds.

In this role, you will…

Own and improve our internal tooling ensuring our engineering team has fast, reliable tools for building and deploying AI-powered seller features

Build and maintain marketplace integrations across Amazon SP-API, Advertising API, Walmart, and other platform connectors that power our tools

Write and maintain documentation that engineers actually want to read. Clear architecture docs, API references, and onboarding guides.

Design internal API surfaces in collaboration with the product team, advocating for clean interfaces and developer ergonomics

Build CI/CD and testing infrastructure that gives the team confidence to ship quickly without breaking things

Instrument and measure developer productivity so we can quantify improvements and identify friction points in the engineering workflow

You’ll be a great fit if you…

You're a developer who cares about other developers. You've felt the pain of bad docs, flaky CI, and tangled integrations. You want to fix that.

You're a strong writer. Technical writing is a core skill, not an afterthought. You can explain complex systems clearly.

You know your way around APIs. REST, GraphQL, webhooks: you've built integrations with third-party platforms and know the pitfalls.

You have platform engineering taste. You have opinions about service boundaries, data pipelines, and infrastructure-as-code.

You ship fast. You bias toward getting things in front of the team and iterating based on feedback.

You're curious about e-commerce. You don't need to be a marketplace expert, but you're interested in the domain and willing to learn how Amazon's ecosystem works.

What it means to join the team...

Shape the engineering platform that powers all of Sellrbox's AI tools

Work directly with marketplace APIs that process millions of data points daily

Collaborate directly with founders and engineering leadership

Honest, low-ego team with autonomy to ship

100% remote with flexible schedule

Comp: $150,000 – $200,000 USD, commensurate with experience

About Sellrbox

Sellrbox is an e-commerce management company building AI-powered tools that help sellers and brands scale on Amazon and beyond. We pair hands-on marketplace expertise with proprietary software to drive real results for our clients.

Our remote team spans multiple countries and is growing fast. We combine deep e-commerce operations knowledge with cutting-edge AI to build tools like Astra, our intelligent advertising platform, that give sellers a genuine competitive edge.