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For Companies At a Glance
- Tasks: Build and scale infrastructure for billions of messages daily and automate deployments.
- Company: Join Customer.io, a leading platform for automated communication.
- Benefits: Competitive salary, comprehensive health coverage, unlimited PTO, and professional development budget.
- Why this job: Make a real impact on communication technology while working with cutting-edge tools.
- Qualifications: 7+ years in SRE roles, deep MySQL experience, and proficiency in Go and Bash.
- Other info: Inclusive culture focused on empathy, transparency, and community impact.
The predicted salary is between 100000 - 140000 £ per year.
About Customer.io
Over 8,000 companies - from scrappy startups to global brands - use our platform to send billions of emails, push notifications, in‑app messages, and SMS every day. Customer.io powers automated communication that people actually want to receive. We help teams send smarter, more relevant messages using real‑time behavioral data. Under the hood: Go, React, Ember and AI help us ship fast and scale with confidence.
We’re looking for a Site Reliability Engineer to help us scale our infrastructure, reduce operational toil, and increase reliability as we grow. If you’ve worked on high‑scale systems and love making platforms better for developers and customers alike, we’d love to meet you.
What We Value
- Ownership - You own problems end to end. You move fast, act like an owner, and thrive in ambiguity. You’ve led complex projects before, whether officially or not, and you’re ready to do it again.
- Engineers with product taste - You think like a user, not just an engineer. You think about performance, reliability, and how systems impact the customer experience.
- A healthy skepticism for “the way things are done” - You bring rigor and creativity. Best practices matter - but never more than forward motion.
What You’ll Do
- Build and scale infrastructure to support billions of messages per day and real‑time events
- Automate deployments, alerting, and incident response
- Make our on‑call better - clear alerts, solid documentation, and faster resolution
- Tune MySQL and other datastore performance and improve reliability across distributed systems
- Collaborate across teams to debug, ship, and support systems in production
- Share knowledge and raise the bar through sharing your progress publicly with short videos, thoughtful writing, and mentorship
- Leverage AI tools to prototype, move faster, and make better decisions
What we’re looking for
- 7+ years in SRE or infrastructure roles, improving production systems at scale
- Deep MySQL experience - schema design, performance tuning, and operational tooling
- Fluency in cloud‑native tech (GCP a plus) and Terraform
- Proficiency in Go and Bash for scripting and systems programming
- Skill in observability, incident response, and debugging distributed systems
- A preference for action over perfection, and pride in owning technical decisions
Compensation & Benefits
We believe in transparency. Starting salary for this role is $140,000 - $180,000 USD (or equivalent in local currency) depending on experience and subject to market rate adjustment. We know our people are what make us great, and we’re committed to taking great care of them. Our inclusive benefits package supports your well‑being and growth, including 100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family. We also offer 16 weeks paid parental leave, unlimited PTO, stipends for remote work and wellness, a professional development budget, and more.
Our Process
- Application - We review everyone with care. Tell us why you’re interested.
- Recruiter Call (30 min) - Let’s chat about what you’re looking for and how we work.
- Behavioral Interview (60 min) - Talk with one of our hiring managers. We’ll explore topics like ownership, product thinking, and collaboration.
- Take‑Home Assignment - Complete a short, realistic task similar to what you’d work on here.
- Technical Interview + Assignment Review Call (90 min) - Walk us through your take‑home project and the decisions you made along the way. We’ll also collaborate on a system design problem, focusing on real‑world scaling challenges and tradeoffs.
All final candidates will be asked to complete a background check and employment verifications as part of our pre‑employment process. Customer.io recognizes the stifling impact of systemic injustice on diverse communities. We commit to using our influence to increase inclusion and equity within the tech industry. We strive to build an inclusive team culture, implement bias‑free hiring practices, and develop community partnerships to expand our global impact.
Join us! We believe in empathy, transparency, responsibility, and, yes, a little awkwardness. If you’re excited by what you read and want to build software that makes communication better for everyone—apply now.
Senior Site Reliability Engineer employer: Customer.io
Contact Detail:
Customer.io Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Site Reliability Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry, especially those at Customer.io. A friendly chat can open doors and give you insights that a job description just can't.
✨Tip Number 2
Prepare for the interview by diving deep into the tech stack mentioned in the job description. Brush up on Go, MySQL, and cloud-native tech. Show us you’re not just a fit on paper but also in practice!
✨Tip Number 3
Don’t just talk about your past projects; share how you’ve made an impact. We love candidates who can demonstrate ownership and creativity in their work. Bring those stories to life!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets the attention it deserves. Plus, it shows you’re genuinely interested in being part of our team.
We think you need these skills to ace Senior Site Reliability Engineer
Some tips for your application 🫡
Show Your Passion: When you're writing your application, let your enthusiasm for the role shine through! We want to see why you're excited about being a Senior Site Reliability Engineer with us and how your experience aligns with our mission.
Tailor Your CV: Make sure your CV is tailored to highlight your relevant skills and experiences. Focus on your achievements in SRE or infrastructure roles, especially those that demonstrate your ability to improve production systems at scale.
Be Clear and Concise: Keep your application clear and to the point. We appreciate straightforward communication, so avoid jargon and fluff. Highlight your key experiences and how they relate to the job description.
Apply Through Our Website: We encourage you to apply directly through our website. This way, we can ensure your application gets the attention it deserves. Plus, it’s super easy and straightforward!
How to prepare for a job interview at Customer.io
✨Know Your Stuff
Make sure you brush up on your MySQL skills, especially schema design and performance tuning. Be ready to discuss specific examples of how you've improved production systems at scale, as this will show your deep understanding of the role.
✨Show Your Ownership Mindset
Prepare to share instances where you've taken ownership of complex projects. Highlight how you moved fast and acted like an owner, even in ambiguous situations. This aligns perfectly with what Customer.io values in their engineers.
✨Think Like a User
When discussing your past experiences, focus on how your engineering decisions impacted the customer experience. Show that you can think beyond just the technical aspects and consider performance and reliability from a user’s perspective.
✨Be Ready for Collaboration
Customer.io values teamwork, so be prepared to talk about how you've collaborated across teams to debug and support systems in production. Share examples of how you’ve communicated effectively and raised the bar through mentorship or knowledge sharing.