Senior Fullstack Engineer

Overview

Job Description

Responsibilities

• - Design and develop high-performance, scalable services in Go and user interfaces in JavaScript (React & Ember), driving critical workflows that empower businesses to engage with their customers.
• - Collaborate cross-functionally with incredible partners across Product, Design, and Engineering to shape and implement features that enhance our platform and deliver seamless, intuitive experiences for our users.
• - Own the entire development lifecycle, from technical design through implementation and deployment, ensuring reliability, maintainability, and performance at scale.
• - Lead by example, mentoring your peers and contributing to a culture of shared knowledge, continuous learning, and technical excellence across the team.
• - Identify high-impact opportunities to improve both backend services and frontend interfaces, turning complex challenges into elegant, user-friendly solutions.
• - Influence product direction through technical insights, proactively collaborating with others to prioritize features that matter most.

Required Skills

• - 7+ years of professional experience in full-stack development, with a strong portfolio showcasing complex web applications and distributed systems.
• - Professional experience with TypeScript combined with advanced knowledge of JavaScript, CSS, and HTML.
• - Experience in modern JavaScript frameworks.
• - Proficiency in backend technologies, ideally with Go or another strongly-typed language such as Java, Kotlin, or TypeScript.
• - Experience designing and maintaining scalable APIs and services with relational or NoSQL databases.
• - Deep experience working in AWS, GCP, or Azure, or tools like Docker and Kubernetes are nice to have.
• - Passionate about building high-quality, testable code using unit, integration, and end-to-end testing to ensure system stability and performance.
• - A track record of collaborating effectively in a distributed team environment, with strong written and verbal communication skills and a commitment to mentoring others.
• - Problem-solving expertise, with the ability to transform complex technical challenges into simple, elegant solutions that delight users.
• - A DevOps approach to development, with experience in CI/CD pipelines, infrastructure automation, and monitoring production systems.
• - Demonstrated ability to influence product direction and contribute technical insights that help drive business value.

Benefits

• - Unlimited PTO - we encourage at least 20 vacation days (in addition to holidays and sick days) so that you can unwind, unplug, and recharge
• - 16 weeks paid parental leave (including adoption and foster care)
• - 100% paid insurance premiums for you and your dependents
• - 401k retirement matching - up to 5% dollar-for-dollar match to retirement contributions
• - $1,500 annual healthy lifestyle budget (for gym memberships, classes, fitness equipment)
• - $250/monthly Remote Work Stipend to be used for home internet, cell phone, and other miscellaneous remote work costs
• - $300/month co-working space rental reimbursement
• - $2,000/yearly professional education budget for conferences, courses, workshops, books, etc.
• - $1,500 home office budget to make sure your working space is ergonomic and just what you need to do your best work
• - One month sabbatical after five years at Customer.io
• - Opportunities to meet in person with your peers throughout the year