Software Engineer II Events
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Job Location:
Boston, NH - USA
Monthly Salary:
Not Disclosed
Posted on:
20 hours ago
Vacancies:
1 Vacancy
Job Summary
We love tackling tough engineering problems and look for Engineers who specialize in certain areas but are passionate about building owning & scaling features end to end from scratch and breaking through any obstacle or technical challenge in their way. We push each other to move out of our comfort zone learn new technologies and work hard to ensure each day is better than the last.
Klaviyo operates a real-time data platform built for massive scale on Amazon Web Services (AWS). Engineers come to Klaviyo with experience in a variety of languages and from a number of disciplines.
**This role is based in Boston and requires working onsite three days per week**
Software Engineer II Events
Boston MA (Hybrid)
Klaviyos Core Data Platform is built on three foundational concepts: Profiles Objects and Events. Events represent the actions taken by customers end users and are the backbone of Klaviyos platform powering segmentation flows analytics and an expanding set of AI-driven features.
About the Role
The Events team owns Klaviyos real-time event ingestion and processing platform one of the highest-scale systems in the company. As a Software Engineer II on the Events team youll help build and operate distributed systems that ingest validate transform and persist billions of events reliably and efficiently.
This role is ideal for engineers who enjoy working on high-throughput latency-sensitive systems care deeply about production quality and want to grow their skills operating large-scale platforms.
How Youll Make an Impact
- Build and operate real-time event ingestion pipelines used by nearly every Klaviyo feature
- Improve system reliability performance and observability in a high-scale environment
- Work on systems that directly power customer-facing automation analytics and personalization
- Gain hands-on experience debugging and operating distributed systems in production
- Collaborate closely with engineers across Core Data and product teams
What Youll Do
- Design implement and maintain event ingestion and processing systems
- Deliver well-scoped projects end-to-end with guidance from senior engineers
- Write high-quality maintainable and well-tested production code
- Participate in code reviews and technical design discussions
- Help monitor and improve system performance reliability and cost efficiency
- Participate in on-call rotations and incident response with mentorship and support
- Work cross-functionally to ensure event data is reliable and usable by downstream systems
What Were Looking For
Required
- 35 years of professional software engineering experience
- Experience building and maintaining production systems and working with databases
- Proficiency in at least one programming language (Python preferred)
- Understanding of distributed systems fundamentals (e.g. concurrency failure modes)
- Strong debugging and problem-solving skills
- Ability to deliver well-scoped work independently while collaborating effectively with a team
Nice to Have
- Experience with data pipelines databases streaming systems or real-time processing
- Experience operating systems in a cloud environment (AWS preferred)
- Familiarity with monitoring alerting and incident response
- Exposure to high-throughput or low-latency systems
Why Join the Events Team
- Work on some of the highest-scale systems at Klaviyo
- Solve challenging real-time data problems with real customer impact
- Learn how large distributed systems behave in production
- Grow alongside experienced platform engineers and mentors
- Build foundational infrastructure used across the entire product
Our Engineering Culture
At Klaviyo we value ownership curiosity and continuous improvement. Engineers are encouraged to understand the systems they work on deeply collaborate openly and take pride in building software that lasts. Youll be supported in growing your technical skills while making meaningful contributions from day
We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3 2025.
Please see the independent bias audit report covering our use of Covey here
Required Experience:
IC
Key Skills
- Spring
- .NET
- C/C++
- Go
- React
- OOP
- C#
- Data Structures
- JavaScript
- Software Development
- Java
- Distributed Systems
About Company
Klaviyo unifies AI-powered email marketing and SMS to drive growth, retention, and measurable results. Build personalized, omnichannel experiences across WhatsApp, ecommerce, and more with K:AI Agents.
