Senior Engineer - Developer Team

Position: Senior Engineer - Developer Experience Team
Senior Engineer

Developer Experience (DX) Team

New York City, NY

Boston, MA

Broomfield, CO

Hybrid Schedule (M/F remote, T/W/TH in-office)

East Coast - Remote

At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and we're looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the world's largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio.

Our tech fuels billions of transactions per day!

About this team:

We're the Developer Experience (DX) team  mission is to make engineers faster, safer, and happier shipping production software by improving the tools, platforms, workflows, and shared engineering capabilities used across the company. The team reduces friction in both the inner loop of development-build, test, run, debug, including CI/CD, releases, observability, reliability, and engineering standards. We build shared platforms, reusable tooling, paved paths, and reference implementations that help teams move faster with less bespoke plumbing and higher confidence.

In this role you will:

Join the Developer Experience (DX) team as a Senior Engineer. This leverage role is for an engineer passionate about multiplying the effectiveness of others through improved tooling, automation, libraries, and workflows.

You will design and build shared engineering capabilities used across Magnite, with a strong focus on AI-enabled development, platform tooling, and developer productivity. Comfort working with Java, Python and Typescript. Rust knowledge is a strong plus. You must bring hands-on experience with modern AI providers and engineering tools such as Cursor, Claude, Codex, and related ecosystems.

You will partner with engineering teams and leadership to identify high-friction workflows, build scalable solutions, and drive adoption through clear documentation and enablement. This is not a feature-delivery role for a single product team; it is a leverage role focused on improving how engineering gets done across the organization.

Developer Platform & Tooling

* Design, build, and maintain shared developer tooling and platform capabilities that improve engineering productivity across teams.

* Collaborate with SRE and engineering teams to design and deliver reusable solutions for common development needs, including service scaffolding, local development workflows, CI/CD patterns, automation, and release tooling.

* Improve the developer experience across the software lifecycle, from code authoring and testing through deployment and supportability.

AI-Enabled Engineering

* Evaluate, integrate, and operationalize AI tools and workflows-using various providers, APIs, SDKs, third party solutions, and agent-style tools-to improve engineering output, quality, knowledge access, and delivery speed.

* Identify and build high-value use cases for AI in software development, such as code generation, code review assistance, documentation, migration support, and internal developer assistants.

* Help define safe, effective patterns for adopting AI in day-to-day engineering work.

Shared Engineering Capabilities

* Build and evolve shared libraries, utilities, reference implementations, and templates (e.g., for configuration, logging, telemetry, resilience, and engineering standards) to reduce duplicated effort across teams.

* Design solutions that are maintainable, observable, secure, and easy for partner teams to adopt.

Standards, Enablement, and Adoption

* Partner with engineering teams to understand friction points and translate them into scalable solutions.

* Produce high-quality documentation, examples, migration guides, and adoption playbooks that enable self-service.

* Support adoption through design collaboration, pairing, and time-boxed engagements where needed.

* Promote standards through useful paved roads and working solutions, minimizing process overhead or gatekeeping.

Quality, Reliability, and Measurement

* Ensure DX-owned tooling and shared components are reliable, secure, observable, and well supported.

* Use data to measure impact, including build/test performance, adoption, reliability, and engineering satisfaction.

* Continuously improve solutions based on developer feedback, operational signals, and usage patterns.

We're looking for someone with:

* 4+ years of professional software engineering experience and a strong track record of building production-grade systems, tooling, or shared platforms.

* Strong proficiency in Java and Python, including writing clean, maintainable, well-tested code and designing reusable abstractions.

* Hands-on experience building developer tooling, internal platforms, shared libraries, automation, or productivity-focused engineering solutions.

* Strong practical experience with modern AI providers, models, and APIs (e.g., Cursor, Claude,…