Sr. Software Engineer, Messaging Infrastructure at Klaviyo
May no longer be active — verify on the employer site
At a glance
- Company
- Klaviyo
- Location
- Dublin, IE, Ireland
- Work arrangement
- On-site
- Employment type
- Full-time
- Experience
- 5–10 years
- Working hours
- 40 hours
- Visa sponsorship
- Offered, according to the listing
- Posted
- Added to The Stack
✨ The Stack take on this Klaviyo job
- 🏢 Klaviyo has 19 jobs here, 11 with visa sponsorship see all
- 🛂 Visa: Critical Skills Employment Permit. Occupations on the Critical Skills list: €40,904 a year with a relevant degree guide
- 💡 No salary shown. Ask Klaviyo if it is above the minimum.
Updated 2026-11-05, from our data and official sources.
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About the role
Responsibilities:
- Own design and delivery of services in the messaging platform that support high-volume campaign processing and delivery.
- Lead performance and scalability efforts: load testing, bottleneck remediation and capacity planning toward billion-message scale.
- Drive cross-team collaboration on architecture, deployment practices and operational runbooks; improve observability and SLOs.
- Mentor engineers, run design reviews, contribute to hiring and raise engineering standards across the team.
Requirements:
- 4–6+ years of software engineering experience with demonstrated ownership of complex production systems.
- Strong system design skills and hands-on experience debugging distributed performance issues.
- Familiarity with the tech stack (Python/Django, messaging systems like Pulsar/Zookeeper, MySQL, Redis, AWS, Terraform) and observability tooling.
- Experience mentoring peers, participating in interviews and contributing to engineering process improvements.
- Clear communicator who collaborates effectively across product, infra and operations teams.
Responsibilities
Build and maintain a highly-scalable campaign pipeline for delivering billions of messages across various channels. Collaborate with stakeholders to design reliable infrastructure and mentor other engineers to improve technical standards.
Requirements
Requires 4-6+ years of software engineering experience with a proven track record of architecting complex, large-scale systems. Must be proficient in performance optimization, data-driven product improvement, and team coaching.
Key skills
- System Architecture — in 171 other listings on The Stack
- Scalability — in 70 other listings on The Stack
- Python — in 1200 other listings on The Stack
- Django — in 51 other listings on The Stack
- React — in 277 other listings on The Stack
- MySQL — in 93 other listings on The Stack
- Redis — in 122 other listings on The Stack
- Memcached — in 2 other listings on The Stack
- Apache Zookeeper
- Apache Pulsar
- AWS
- Terraform
- Jenkins
- Mentoring
- Agile
- System Monitoring
On The Stack (as of 2026-11-05)
Frequently asked questions about Klaviyo
Is this Sr. Software Engineer, Messaging Infrastructure role still open?
It was posted on 2026-06-18. Listings more than 30 days old may no longer be active, so check Klaviyo's site before applying.
Does Klaviyo offer visa sponsorship?
This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Klaviyo's site.
Where is this role located?
The listing gives the location as Dublin, IE, Ireland. It is marked on-site.
What skills does this role ask for?
The listing names: System Architecture, Scalability, Python, Django, React, MySQL, Redis, Memcached, Apache Zookeeper, Apache Pulsar, AWS, Terraform, Jenkins, Mentoring, Agile, System Monitoring.