Senior Site Reliability Engineer
Customer.io
About the role
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.
Location: Full Remote (EMEA)
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 consider 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 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
- Salary: $140,000 – $180,000 USD (or equivalent in local currency) depending on experience, subject to market rate adjustment.
- Benefits:
- 100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family.
- 16 weeks paid parental leave.
- Unlimited PTO.
- Stipends for remote work and wellness.
- Professional development budget.
- Additional perks – see full benefits here →.
Our Process
- Application – We review everyone with care. Tell us why you're interested.
- Recruiter Call (30 mins) – Discuss what you’re looking for and how we work.
- Behavioral Interview (60 mins) – Talk with a hiring manager about 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 mins) – Walk through your take‑home project, discuss decisions, and collaborate on a system‑design problem focusing on real‑world scaling challenges and trade‑offs.
All final candidates will complete a background check and employment verifications as part of our pre‑employment process.
Inclusion & Diversity
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.
Interview Platform & Offer Details
- Video platform: Zoom (virtual interviews will be conducted using video, not chat).
- Offer letters: Extended in writing on official Customer.io letterhead.
- Contact: jobs@customer.io for any questions.
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.
This offer from “Customer.io” has been enriched by Jobgether.com and received a 84 % flex score.
Requirements
- 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
Responsibilities
- 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
Benefits
Skills
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