Backend Engineer

Job Description

Want to help everyday Americans invest and build wealth? Financial inequality is increasing, and too many people are getting left behind. At Stash, we're passionate about democratizing wealth creation through education, advice, and products that help customers achieve greater financial freedom. We also believe in working smarter, using AI and emerging technologies to move faster, operate more efficiently, and focus our time on solving meaningful problems for our customers.

As a key member of the Dev Leverage team, you will own the path our engineers use to ship. That path is shared CI/CD, trunk-based delivery, and a default way to start a new service. The estate is real and mixed: Go and other languages, GitHub Actions and remaining CircleCI, Kubernetes on AWS, and a trunk standard we are still rolling out. We are looking for engineers who like building the tool everyone else uses, and who are careful when a one-line workflow change can land on many teams at once.

This position operates on a hybrid schedule, requiring you to be on-site in our New York office at least three days per week to work with stakeholders and foster team collaboration.

What you'll do:

• Design, build, and maintain the shared CI/CD workflows Stash services use to test and deploy.
• Move services onto trunk-based delivery: one main branch, squash merges, and one immutable artifact promoted from edge to staging to production.
• Replace one-off pipelines with a paved road: reusable GitHub Actions, a default path for a new service, and docs that match the workflow that runs.
• Keep that path reliable. Runners, failed jobs, and deploy health need a clear owner when something breaks.
• Partner with application teams, infrastructure, and security so the standard stays safe and teams can adopt it without a bespoke design.
• Use AI coding tools to migrate and implement faster, and keep review and production gates in place so generated changes stay safe.
• Debug, test, and document the workflows themselves. A change here is a change for many teams.

What we're looking for:

• 3 to 5 years of professional experience in backend or platform engineering.
• Proof you have owned CI/CD other people use. GitHub Actions preferred. CircleCI or a similar system counts if you have built reusable workflows, promotions, and secrets handling.
• Strong proficiency in Go, or deep experience in another backend language (TypeScript, Ruby, Python, or Rails) with a willingness to work across stacks.
• Experience shipping with trunk-based development or continuous delivery, including immutable artifacts and environment promotion.
• Hands-on experience with cloud platforms (AWS) and containers.
• A habit of measuring blast radius before you merge. You have broken a shared system before, and you changed how you work because of it.
• Excellent problem-solving skills and a mindset for continuous improvement.
• Clear writing. App teams will follow your workflow only if the docs and the pull request explain the why.

Gold Stars:

• Terraform and Argo CD.
• Package registries such as Artifactory or GitHub Packages.
• Datadog or similar observability for CI and deploys.
• A migration you led off a legacy CI system.
• Familiarity with banking or fintech systems.