Software Engineer II, 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:
- Design, build and operate features of a high-throughput messaging pipeline that processes campaign traffic at scale.
- Implement reliable, highly-available components for message processing, delivery and retry logic across channels (email, SMS, push, etc.).
- Collaborate with product, infra and cross-functional teams to define designs, perform load testing and ship production changes safely.
- Diagnose and resolve performance, scaling and reliability issues; improve monitoring and alerting for key flows.
- Mentor peers, contribute to technical reviews and participate in hiring/interviewing to maintain team quality.
Requirements:
- 4+ years software engineering experience with ownership of at least one complex, production system.
- Strong fundamentals in large-scale system design, performance tuning and trade-offs for availability and cost.
- Experience with relevant stack components (Python/Django, message systems like Pulsar, MySQL, Redis, AWS and Terraform preferred).
- Comfortable debugging distributed systems, writing tests and improving deployment/experiment workflows.
- Good communication skills, collaborative mindset and willingness to mentor others.
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+ years of software engineering experience with a proven track record of architecting complex, large-scale systems. Must be proficient in performance tuning, 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 Software Engineer II, 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.