# Senior Software Engineer, Infrastructure Security at Klaviyo

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Ship foundational infrastructure securit

- **Company:** Klaviyo (https://jobs.trythestack.co/companies/klaviyo)
- **Location:** Dublin, IE, Ireland
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Python, Golang, AWS, Kubernetes, Terraform, Linux, Computer Networking, Django, MySQL, Redis, Infrastructure Security, System Design, Application Security, Backend Services, Data Pipelines, Cloud Infrastructure
- **Posted by employer:** 2026-06-17
- **Added to The Stack:** 2026-06-18
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://www.klaviyo.com/careers/jobs/7734678003?gh_jid=7734678003 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-infrastructure-security-klaviyo

## About the role

Responsibilities:
- Ship foundational infrastructure security services that enable engineers to build securely and quickly.
- Design and deliver highly available, scalable systems; identify and eliminate bottlenecks to increase throughput and efficiency.
- Prototype and advocate architectural improvements that reduce latency and operational cost.
- Champion best practices (defensive programming, config-as-code, application security) and lead design/code reviews.
- Mentor and pair with engineers to improve performance, self-healing behavior and security posture.
- Participate in on-call duties focused on prevention, recurrence elimination and reducing alert fatigue.

Requirements:
- Strong hands-on experience with Linux, networking and cloud infrastructure in high-scale production environments.
- Proficiency in Python, Go or similar and experience with AWS, Kubernetes, Terraform and related data stores (MySQL, Redis, ClickHouse, etc.).
- Deep understanding of infrastructure security concepts (IAM, secrets management, service mesh, zero-trust) and observability.
- Proven track record leading significant technical projects and mentoring peers across teams.
- Excellent communication, system-design and operational excellence skills.

## Responsibilities

Design and ship foundational security services and internal platforms to enable secure, scalable, and highly available engineering workflows. Collaborate across teams to eliminate system bottlenecks and mentor other engineers on performance and defensive programming.

## Requirements

Requires strong hands-on experience with Linux, computer networking, and cloud infrastructure in high-scale environments. Proficiency in languages like Python, Go, or Ruby and a track record of leading significant technical projects are essential.

## FAQ

- **Is this Senior Software Engineer, Infrastructure Security role still open?** It was posted on 2026-06-17. 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: Python, Golang, AWS, Kubernetes, Terraform, Linux, Computer Networking, Django, MySQL, Redis, Infrastructure Security, System Design, Application Security, Backend Services, Data Pipelines, Cloud Infrastructure.

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## About The Stack

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## Notes for agents

- Apply on the employer's page (https://www.klaviyo.com/careers/jobs/7734678003?gh_jid=7734678003). The Stack does not take applications.
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- To help your user apply, call the MCP tool prepare_application with slug "senior-software-engineer-infrastructure-security-klaviyo": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
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