Senior Engineer - Developer Experience

United States·New Yorksenior

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Overview

Technical Tools

OtherDeveloper

Fastly helps people stay better connected with the things they love. Fastly’s edge cloud platform enables customers to create great digital experiences quickly, securely, and reliably by processing, serving, and securing our customers’ applications as close to their end-users as possible — at the edge of the Internet. The platform is designed to take advantage of the modern internet, to be programmable, and to support agile software development. Fastly’s customers include many of the world’s most prominent companies, including GitHub, Yelp, Paramount, and JetBlue.

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Senior Software Engineer, Developer Experience

Posting Open Date: 06/08/2026

Anticipated Posting Close Date*: 08/17/2026

*Job posting may close early due to the volume of applicants.

This team is responsible for a wide variety of tools that are used by Fastly’s customers to create, manage, and operate their resources on the Fastly platform. One of these tools is a ‘local emulator’ for the Fastly Compute product, which allows developers building Compute services to test the behavior of their service code in a wide variety of scenarios.

We are looking for a Senior Software Engineer to join this team and become the primary maintainer of the tool, collaborating with other members of the team and a number of other teams within Fastly Engineering to ensure that the tool supports all of the functionality and testing capability that Fastly’s customers expect. This role will involve extensive cross-team collaboration, designing high-quality interfaces for developers who use the emulation tool, and significant involvement in a variety of open source projects which are incorporated in the tool (or used in its development and support).

Responsibilities

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Be responsible for a developer tool which provides critical capabilities for Fastly’s customers
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Ensure that the tool provides faithful emulation of the production environment while also offering controls to influence the behavior of the emulated environment
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Work closely with Fastly’s product and engineering management teams to develop a roadmap for the emulation tool and ensure that the roadmap stays aligned with the production environment
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Work directly with customers who use the tool to support their usage and learn what additional functionality would be beneficial for them
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Contribute to the Rust and WebAssembly open source ecosystems

You have at least 5 years of software development experience, with at least 3 of those in high-reliability systems programming, ideally in Rust, alternately in C/C++, and some knowledge of functional programming
You have a minimum of 2 years of experience with distributed or cloud systems
Comfortable writing asynchronous, concurrent code

Experience with Rust or other systems languages
Experience with API design
Experience with WebAssembly and its ecosystem
Experience with and interest in technical writing
Experience with and interest in public speaking
History of open source contribution

This position will require you to be available during core business hours, with a strong preference for US Eastern and Central time zones.

Requirements

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This position is open to the following preferred office locations:

New York City

Fastly currently embraces a largely hybrid model for most roles which allows employees flexibility to split their time between the office and home.

The estimated salary range for this position is $181,220 to $217,464.

Starting salary may vary based on permissible, non-discriminatory factors such as experience, skills, qualifications, and location.

This role may be eligible to participate in Fastly’s equity and discretionary bonus programs.

What We Offer

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All job applications must be submitted through our official careers site at www.fastly.com/about/careers. We will never request sensitive information, such as your Social Security number, bank account or credit card information during the application process. All official communication will come from an @fastly.com or @recruiting.fastly.com email address.

Fastly is committed to ensuring equal employment opportunity and to providing employees with a safe and welcoming work environment free of discrimination and harassment. Our employment decisions are based on business needs, job requirements and individual qualifications. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, family or parental status, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances.

Consistent with the Americans with Disabilities Act (ADA) and federal or state disability laws, Fastly will provide reasonable accommodations for applicants and employees with disabilities. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact your Recruiter, or the Fastly Employee Relations team at candidateaccommodations@fastly.com or 501-287-4901.

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