Lead System Software Engineer

| Greater Boston Area
Engineering at Klaviyo
Klaviyo is a Boston startup located right in the heart of downtown Boston. We craft software helping thousands of ecommerce companies to have engaging relationships with hundreds of millions of consumers. We love taking on tough engineering problems and look for full stack 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 is looking for Lead System Software Engineer to take the ownership of a product area and lead a team of engineers in building and maintaining the product area.

What you’ll be doing:

  • Wholly owning features that thousands of our customers rely on daily to reach 100,000,000+ of consumers to drive their business forward.
  • Working on crafting our highly scalable real-time data pipeline that processes billions of events weekly across data sets growing to petabyte scale.
  • Working on deep analytics system that provides insight into hundreds of terabytes of data.
  • Be responsible for the mission, technical direction and operations of projects that have immediate impact.
  • Helping architect and design robust and high performance data processing and storage systems leveraging new databases to serve different internal and external use cases. Contribute to open source data processing technologies.
  • Contributing to the company as a subject matter expert in multiple areas, constantly pushing yourself to be a better engineer and to level up all of your peers within your team and within Klaviyo.

We’d love to hear from you if you:

  • Have 5+ years of experience building products that matter and pushing yourself and your team to be better engineers and build a product with passionate advocates
  • Enjoy working with new technologies ranging from the frontend to backend, and are particularly passionate and an expert in multiple stack areas. You show this by having strong and opinionated experience with various technologies and know how to pick the right tool for any job
  • Love digging into performance and scalability issues to drive breakthrough solutions-- whether it's a slow loading UI or too many clicks in a workflow, a database query timing out, or a queue that just won’t drain. You recognize all problems can be solved
  • Enjoy shipping code early & often in an agile fashion, pairing with product management to craft better software by soliciting feedback from thousands of end users
  • Like working on small, autonomous agile teams. At Klaviyo, you will have ownership of features, but you'll collaborate with everyone to make sure we produce the right solution

Technologies We Use
Klaviyo operates a real-time data platform coded in Python 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. The core Klaviyo platform is comprised of the following components that all engineers are expected to become extremely proficient:
 Python, Django, Java, Celery
 MySQL, Cassandra, RabbitMQ, Redis
 HTML, JavaScript, LESS, Backbone.js, React
 Amazon Web Services (EC2, RDS, Aurora, etc.)
 Terraform, Ansible, Packer, and other DevOps tools
Lead Engineers are expected to bring to Klaviyo subject matter expertise and demonstrate adaptability by continuing to acquire and master new skills, level up all those around them, and research and prototype new technologies and solutions to help scale Klaviyo’s systems and product capabilities.
Problems We’re Solving
As a high growth startup we look for candidates that can rise to any occasion and seek out new opportunities to make their mark on our product. The following are examples of exciting projects the engineering team is working on:
-Scaling our data processing systems to handle orders of magnitude more data and perform advanced analytics of billions of events in real time by innovating on event-driven data pipelines and building robust distributed data stores
-Reliably integrating with 10s of thousands of remote API endpoints to process ecommerce data for historical and real-time syncs
-Extracting additional insight from our data sources using machine learning and other data science techniques to allow ecommerce marketers to more efficiently perform their jobs and grow their business, and build features into Klaviyo product to make it incredibly easy for marketers to follow best practices
About Klaviyo
Klaviyo is a team of people who are crazy motivated by growth.
It’s what we help our customers do: grow their businesses by making it possible and easy for them to use their data to power better marketing.
It’s how we behave as individuals: we’re all deeply passionate about learning.
It’s how we manage our business: we have thousands of paying customers, we’re profitable, and we’re growing insanely fast.
And it’s what our culture is all about. Working at Klaviyo means you’ll work on things you never imagined you would; you’ll grow in ways you didn’t consider possible; and you’ll do the best work of your career with people who are just as motivated and talented as you are.
Your curiosity has led you this far, so if this sounds like your ideal place to work, apply here.

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Technology we use

  • Engineering
    • JavaLanguages
    • JavascriptLanguages
    • PythonLanguages
    • SqlLanguages
    • ReactLibraries
    • Twitter BootstrapLibraries
    • Backbone.jsFrameworks
    • DjangoFrameworks
    • FlaskFrameworks
    • HadoopFrameworks
    • CassandraDatabases
    • MySQLDatabases
    • RedisDatabases

Location

We're in the heart of the Financial district with easy access to public transportation and a short walk from South Station.

An Insider's view of Klaviyo

What’s the vibe like in the office?

The simplest way I would describe the Klaviyo office is "energy". From the minute you start your day there's an excitement that everyone is working toward the common goal of helping businesses grow. It's a pretty amazing thing to be a part of and you can really feel it.

Jon

Director of Community Management

How do you collaborate with other teams in the company?

One of the great things about working at Klaviyo is that I get to work with amazing people from across the organization. While working in Finance isn’t intuitively a role that involves a lot of collaboration - Klaviyo’s finance team has regular interactions and team syncs with Sales Ops, Customer Support and the People Team!

Tai

Staff Accountant

How would you describe the company’s work-life balance?

As a working parent I feel incredibly excited to work at Klaviyo because I feel so supported in two amazing roles - Director of Customer Success and Parent to a 3 year old. Being able to develop an amazing team without worrying about being judged for making time for my family is one of the many things that makes Klaviyo special.

Rach

Director

What are Klaviyo Perks + Benefits

Culture
Friends outside of work
Eat lunch together
Intracompany committees
We have a diversity and Inclusion committee that sponsors monthly company-wide activities to educate and enrich our employees.
Daily stand up
Open door policy
Team owned deliverables
Team based strategic planning
Group brainstorming sessions
Pair programming
Open office floor plan
Diversity
Dedicated Diversity/Inclusion Staff
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Klaviyo employees can contribute up to $2700 annually to their FSA.
Disability Insurance
Disability insurance that covers 60% of annual salary.
Dental Benefits
Our dental plan covers : 100% for preventative care., 80% for basic restorative, 50% for major restorative.
Vision Benefits
Our vision benefits plan covers 100% for annual eye exams with $150 for glasses and contact lenses.
Health Insurance Benefits
Life Insurance
Life insurance is equal to 1 times an employee's annual salary up to 300k.
Pet Insurance
We offer discounted pet insurance through our insurance provider.
Wellness Programs
Onsite Gym
Retirement & Stock Options Benefits
401(K)
Klaviyo's 401k plan offers stocks, bonds and international index funds to choose from.
401(K) Matching
Company Equity
Klaviyo offers equity packages to full time employees.
Child Care & Parental Leave Benefits
Generous Parental Leave
We provide up to 12 weeks of parental leave.
Flexible Work Schedule
Klaviyo provides employees with a flexible work schedule that includes Core hours, Flexible start and end times.
Remote Work Program
Family Medical Leave
Vacation & Time Off Benefits
Unlimited Vacation Policy
Paid Volunteer Time
Klaviyo offers unlimited time off.
Paid Holidays
Paid Sick Days
Klaviyo offers unlimited time off.
Perks & Discounts
Beer on Tap
Casual Dress
Commuter Benefits
Klaviyo offers Tax preferred transit and parking plans for employees.
Company Outings
Klaviyo Hosts bi-annual company parties and milestone celebrations when targets are reached ! ( usually once a year)
Game Room
Klaviyo offers ping-pong tables, and a number of different gaming consoles for employee use.
Stocked Kitchen
Klaviyo offers a WELL STOCKED FREE kitchen with snacks and drinks for all employees.
Some Meals Provided
Klaviyo often surprises employees with free breakfast or meals and Free lunch on Wednesdays for all!
Happy Hours
Happy hours are hosted Once per week on Fridays!
Parking
There is a parking garage in the building.
Fitness Subsidies
Klaviyo offers 3 months of subsidised gym membership.
Professional Development Benefits
Tuition Reimbursement
Our tuition reimbursement plan offers an annual max of $3000 for continuing education.
Lunch and learns
Klaviyo hosts weekly Lunch and Learns.
Promote from within
Continuing Education stipend
We offer $3000 annualy for continuing education.
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