Senior Engineer - Growth

Socket.dev; Denver (CO); On-site; USD 181,220 - 217,464; Full time

Benefits offered by this job

Comprehensive benefits package

401(k) with company match

Flexible vacation policy

Up to 18 days of paid sick leave

Employee Stock Purchase Program

Job summary

Fastly is seeking a Senior Engineer - Growth to design, build, and own systems and APIs that enhance customer growth across its product offerings. The successful candidate will work collaboratively with product and platform teams to deliver innovative solutions while leading projects from conception to production.

Must have strong backend development skills with experience in large-scale system design, mentoring engineers, and working in a hybrid setting that offers flexibility. The position requires collaboration and technical leadership to drive successful project outcomes.

Qualifications

• Hands-on experience designing and building reliable, large-scale backend systems.
• Strong proficiency in at least one backend language.
• Experience with relational databases required; NoSQL is a plus.
• Experience in greenfield development.

Responsibilities

• Design and build new backend services and APIs from start to finish.
• Collaborate with product and platform teams for service integration.
• Mentor junior engineers through technical guidance.
• Participate in on-call rotations for service stability.

Skills

Backend systems design and implementation

Proficiency in backend languages

Experience with relational and NoSQL databases

Code performance and maintainability

Project ownership

Technical proposal writing

Mentoring engineers

Adaptability in ambiguous situations

Tools

Go

React

Kafka

Job description

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.

We're building a more trustworthy Internet. Come join us.

Senior Engineer - Growth

Posting Open Date: 06/02/26

Anticipated Posting Close Date*: 08/03/26

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

The Fastly Growth Engineering team is looking for an experienced, highly collaborative full-stack software engineer to evolve, design, build, and own systems & APIs that drive customer growth across Fastly’s product portfolio. Our team owns systems that help Fastly customers discover and adopt the right products for their use cases. You will design and build new services from the ground up, collaborate closely with product and platform teams, and take projects from ambiguous problem statements through to production.

What You'll Do:

• Design, build, and own new backend services and APIs end-to-end, from technical proposal through implementation, testing, and production rollout.
• Contribute to frontend experiences that surface the team’s services to customers.
• Take ambiguous or broadly-scoped problems and turn them into well-defined technical plans that the team can execute on.
• Author design and architectural documents and use them to drive alignment across engineering and product teams.
• Collaborate with internal platform teams, product managers, and stakeholders across the organization to understand needs and deliver impactful solutions.
• Consider stability, performance, and scalability in your designs and in the guidance you provide to the team.
• Mentor and grow other engineers on the team through code review, pairing, and technical leadership.
• Participate in an on-call rotation.

What We're Looking For:

• Hands‑on experience designing and building reliable, large-scale backend systems - most Senior Engineers at Fastly have at least 5 years of relevant experience.
• Strong proficiency in at least one backend language, with the ability to pick up new languages and frameworks quickly.
• Experience designing and implementing new services or systems from scratch (greenfield development).
• Experience with a relational database is required and NoSQL database is a big plus.
• Experience writing code that is performant, maintainable, clear, and concise.
• A track record of taking ownership of projects (not just individual tasks) and driving them to successful outcomes.
• Experience authoring technical proposals and design documents to align stakeholders and guide implementation.
• Experience working across teams and functions to understand business needs and deliver software that meets them.
• Experience mentoring, guiding, and growing other engineers.
• Comfort operating in ambiguity. You can assess feasibility, identify constraints, and formulate a realistic plan even when the problem isn’t fully defined.
• Ability to learn new skills and share what you’ve learned with the broader team.

We'll be super impressed if you have experience in any of these:

• Experience with Go and/or React.
• Experience with AI/LLM technologies, recommendation systems, data science, or data modeling.
• Experience with or interest in Rust.
• Experience with event-driven architectures (ex: Kafka, message buses) and distributed systems at scale.

Work Hours:

• This position will require you to be available during core business hours.

Work Location & Travel Requirements:

This position is open to the following office location:

• San Francisco, CA

Fastly currently embraces a largely hybrid model for most roles which allows employees flexibility to split their time between the office and home. We do not support relocation.

Salary:

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.

Benefits:

We care about you. Fastly works hard to create a positive environment for our employees, and we think your life outside of work is important too. We support our teams with great benefits that start on the first day of your employment with Fastly. We offer a comprehensive benefits package including medical, dental, and vision insurance. Family planning, mental health support along with Employee Assistance Program, Insurance (Life, Disability, and Accident), a Flexible Vacation policy and up to 18 days of accrued paid sick leave are there to help support our employees. We also offer 401(k) (including company match) and an Employee Stock Purchase Program. For 2026, we offer 11 paid local holidays, 12 paid company wellness days.

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 [e-mail] or 501-287-4901.

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