Senior Software Engineer

Ventures is where Klaviyo builds new products that are adjacent to the core business. We seek to leverage data, automation and scale to deliver our customers more powerful and integrated experiences.

This is a high visibility, high impact role with ample opportunity for growth. You will build mission-critical features inside a new team and product. You will define new engineering practices, code infrastructure and other primitives that ensure the success of Klaviyo Ventures for the long run.

Why you should join Klaviyo Ventures

Do you want to build a startup inside a much bigger startup?

We’re looking for entrepreneurial builders who want to work with a small team to rapidly iterate against new product areas. You will work closely with potential customers to build solutions to key problems they face. 

You’ll have the autonomy to move fast and get a product from zero to one. And then you will scale it to hundreds of thousands of users.

How you’ll make a difference

• Launch a new product as part of a small team exploring new revenue opportunities.
• Be empowered to own the mission, technical direction and operations of projects that have immediate impact
• Advance your technical skills in all facets ranging from front end web development and user experience to machine learning and massively parallelized data pipelines

As a Sr. Full Stack Software Engineer you will collaborate with engineers, designers and a product manager. You’ll build amazing new products and experiences that unlock new growth trajectories for Klaviyo.

Who You Are

We are looking for a full-stack engineer with a focus on the front-end. We expect this engineer to have experience using Typescript, React and Python to craft scalable systems. 

Candidates for this role should be confident writing production ready code on the client and server in order to build best in class UI/UX experiences. This engineer should be experienced writing their own frontend and backend components, build and/or extend libraries, etc. This role requires writing API endpoints and creating flexible and re-usable data models.

Klaviyo at present has over 143K+ paying customers generating over $50bn+ of Klaviyo Attributed Value (KAV) and it is important we are able to scale inside and outside our customer base. To that end, we expect engineers on our team can build and work with fault tolerant, containerized distributed systems. On the frontend, we expect that you can re-use and create flexible components capable of rendering across browsers & devices with different specs.

At your core, you are:

• Entrepreneurial - You’ve launched your own companies or side projects or are used to working quickly and iteratively based on customer feedback.
• Empathetic - Experience 1:1 interfacing with customers to help improve your product and process. 
• Experienced - 5-7+ years of experience and have architected, built and delivered user-facing features that added business value
• Confident - You are comfortable setting higher-level technical direction and process with the help of peers and senior management. You are comfortable with ambiguity.
• Curious - You enjoy working with new technologies ranging from the frontend to backend and have deep experience in multiple technology stacks. You show this by having strong opinions and experience with various technologies throughout multiple projects. You know how to pick the right tool for any job.