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Software Engineer, Data Science at Klaviyo (Remote)

Klaviyo
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At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying.

The Klaviyo Data Science team loves programming and the excitement that comes with building something people use. We are the kind of people that love talking to users and can find the balance between solving a problem quickly and thinking about how code will scale in the future. We love to move fast, keep learning, and get stuff done.

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.

Our data science team takes ideas from inception to new machine learning-powered features that ship to our hundreds of thousands of users. You’ll be central to creating features that help our customers learn and grow from their data. 

We love tackling tough engineering problems and are looking for a Senior Full Stack Engineer who specializes in certain areas but is passionate about building, owning & scaling features end to end from scratch and breaking through any obstacle or technical challenge in their way.

Technologies we use (not comprehensive!):

  • Python
  • Numpy, Scipy, Pandas
  • Aurora, Cassandra, Kafka
  • HTML, JavaScript, React
  • SageMaker

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech and listen to our data science team podcast at https://medium.com/klaviyo-data-science

How you will make a difference:

  • Build features built on data science that thousands of our customers rely on daily to reach 100M+ of consumers to drive their business forward
  • Ship code early & often in an agile fashion, pairing with product management to craft better software by soliciting feedback from thousands of end users
  • Be empowered to own the mission, technical direction and operations of projects that have immediate impact
  • Test data science algorithms and techniques on data sets and engineer data systems that let non-technical users make decisions with their first party data in real time
  • Advance your technical skills in all facets ranging from front end web development and user experience to machine learning and massively parallelized data pipelines
  • Contribute 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

Who You Are:

  • 2+ years of software engineering experience in a fast-paced SaaS environment
  • Enjoy working with new technologies ranging from the frontend to backend, and are particularly passionate and an expert in multiple stack areas
  • Passionate about working with Data Scientists in productizing data science / machine learning models for end-users, including building out the necessary back-end and UX/UI
  • Deep knowledge of object oriented programming and experience with at least one object oriented programming language (Python, C++, Java, Javascript, C#, Ruby)
  • Basic understanding of database technologies such as SQL, PL/SQL and relational database schema design in production
  • Have a bachelor’s or advanced degree in computer science, applied math, statistics or other relevant quantitative discipline, or equivalent industry experience.

Get to Know Klaviyo

Klaviyo is a world-leading marketing automation platform dedicated to accelerating revenue and customer connection for online businesses. Klaviyo makes it easy to store, access, analyze and use transactional and behavioral data to power highly-targeted customer and prospect communications. The company's hybrid customer-data and marketing-platform model allows companies to grow by fostering direct relationships with customers, without giving up their valuable data to popular big-tech ad platforms. Over 265,000 innovative companies like Unilever, Custom Ink, Living Proof and Huckberry sell more with Klaviyo. Learn more at www.klaviyo.com.

Klaviyo is committed to diversity and to a policy of equal employment opportunity and non-discrimination. We do not discriminate on the basis of race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation or any other characteristic protected by applicable law.

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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. We also have offices in Denver, London and Sydney.

An Insider's view of Klaviyo

What's something quirky about your company?

There are a lot of quirky things about Klaviyo - from our love for Nicolas Cage to our need to use gifs and emojis in any and all communications. But the quirkiest, or most unexpected, thing about Klaviyo is how kind, genuine, and caring each person is here. Every day you’ll have the opportunity to work with folks that truly care.

Natalie

Senior New Hire Specialist

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

Senior Billing Specialist

How do you empower your team to be more creative?

We give people the means to learn, be it an unlimited budget for books or whatever is going to make you better. We’re going to give engineers the ability to go to conferences of their choice — this is a deeply personal thing that people need to be passionate about and be able to learn.

Allen

Chief Technology Officer

What are Klaviyo Perks + Benefits

Klaviyo Benefits Overview

Klaviyo values our employees' health, wellbeing, and professional development. We take pride in our benefits, programs and perks. One of our core values is "Klaviyos are always learning." We offer a robust learning stipend to bolster your professional interests (or learn a new language), leadership training to all Klaviyos (including individual contributors and managers), coaching for all Klaviyos, and a book reimbursement policy. Additional benefits include flexible paid time off, employee referral bonuses, commuter/transit expenses, fitness reimbursements, premium mental and emotional wellbeing programming, and a fun company atmosphere. Diversity, equity and inclusion is woven throughout our Klaviyo fabric - from Klaviyo Resource Groups to company-wide programming. Over 70 percent of our employees participate in one of our ten global Klaviyo Resource Groups! We also offer competitive salaries and 401K match through Principal.

Culture
Volunteer in local community
Klaviyos are offered paid time off to volunteer in their local community. In 2022 we volunteered with local organizations like Build Boston, Cradles to Crayons, and the Emerald Necklace Conservancy
Partners with nonprofits
All our Klaviyo Resource Groups are provided a donation budget for mission aligned causes. Our TA team also partners with nonprofits like Thrive Scholars, and Hack Diversity, and the Upward Project.
Open door policy
OKR operational model
Team based strategic planning
Pair programming
Open office floor plan
Flexible work schedule
Klaviyo provides employees with a flexible work schedule that includes core hours, flexible start and end times.
Remote work program
Diversity
Dedicated diversity and inclusion staff
Highly diverse management team
Klaviyo has made significant investment in diversifying our management team at every level, from first level leaders and our executive leadership team to our Board of Directors.
Mandated unconscious bias training
Unconscious bias is embedded into all of our trainings - from interview to manager trainings. This is not a one-time thing, but a continuous area of focus and commitment for us.
Mean gender pay gap below 10%
Diversity employee resource groups
We have a robust resource group community at Klaviyo. We foster events that teach around intersectionality so we can all learn and grow together. Each department also offers unique programming.
Hiring practices that promote diversity
We have policies in place to ensure a fair and equitable hiring process, while also customizing recruiting strategies for specific roles because we know it's not a one-size fits all.
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Klaviyo's healthcare & dependent care FSAs help employees cover out-of-pocket medical, dental and vision expenses, as well as qualified childcare expenses with contributions up to the IRS maximum.
Disability insurance
Our short and long term disability insurance benefit pays 60% of an employee's annual salary (OTE if applicable). We also cover the 40% gap in pay for the first 6 weeks of any approved medical claim.
Dental insurance
Our dental plan covers : 100% for preventative care, 80% for basic restorative, 50% for major restorative. As well as services like adult orthodontics.
Vision insurance
Our vision benefit plan offers access to enhanced plus providers, as well as 100% coverage for annual eye exams with $150 allowance for glasses and contact lenses each.
Health insurance
Klaviyo offers 3 health insurance plans with BCBS. Employees who select the High Deductible Health Plan receive up to $2,000/year to fund a Health Savings Account.
Life insurance
Life insurance is equal to 1 times an employee's annual salary up to $300,000. Additionally, Accidental Death & Dismemberment coverage is offered equal to the group life benefit.
Wellness programs
Klaviyos may be reimbursed up to $200 for online and app-based classes, exercise equipment, financial health programs, etc. Additionally, BCBS provides Klaviyos up to $150 / year for fitness expenses.
Mental health benefits
We offer robust and comprehensive mental and emotional well-being programming through Modern Health. Customizable care encompasses therapy, coaching, self-paced courses and more.
Financial & Retirement
401(K)
Klaviyo's 401k plan offers stocks, bonds and international index funds to choose from.
401(K) matching
Klaviyo's 401(k) retirement plan matches an employee's contributions up to 4% of their annual base salary, with immediate vesting for matched contributions.
Company equity
Klaviyo offers equity packages to all full time employees, vesting over a four-year period.
Child Care & Parental Leave Benefits
Generous parental leave
Klaviyo guarantees all new parents (birth, adoption, foster care) 16 weeks of 100% paid parental leave, with an additional medical recovery leave for birthing parents.
Family medical leave
Klaviyo offers up to 12 weeks of unpaid, job-protected leave per year, as well as maintained health benefits, for any employee eligible under the Family and Medical Leave Act (FMLA).
Vacation & Time Off Benefits
Unlimited vacation policy
Generous PTO
We have an unlimited flexible paid time off policy and employees are encouraged to take a minimum of 4 weeks off per year.
Paid volunteer time
In line with our value to make the world more equitable, Klaviyos are encouraged to use their flexible paid time off policy to volunteer and give back to their local communities.
Paid holidays
Paid sick days
Klaviyos can leverage their flexible paid time off when experiencing an illness.
Office Perks
Commuter benefits
Klaviyo offers tax preferred transit and parking plans for employees in the Boston office and contributes $50 per month to the transit or parking plan.
Company-sponsored outings
Klaviyo has regular in-person team offsites, as well as virtual activities like trivia nights, cooking classes craft workshops.
Free snacks and drinks
Klaviyo offers a well stocked kitchen with free snacks and drinks for all employees.
Some meals provided
Klaviyo often surprises employees with free breakfast or lunches.
Company-sponsored happy hours
Our Boston office hosts regular wine Wednesdays. In addition, individual teams and Klaviyo Resource Groups often gather for their own happy hours.
Onsite office parking
There is a parking garage underneath the building.
Recreational clubs
We have a number of Slack channels for Klaviyos with shared interests such as cooking, woodworking, 3D printing, and more!
Relocation assistance
In certain cases, for new hires in roles that are required to be in the Boston office, there is the potential for relocation assistance to be offered.
Fitness stipend
Klaviyos may be reimbursed up to $200 for exercise classes, equipment, financial health programs, etc. Additionally, BCBS provides Klaviyos up to $150 / year for fitness and weight loss programs.
Home-office stipend for remote employees
Depending on role, all employees receive a one time $500-1000 reimbursement to set up their home office, as well as a $65 monthly stipend for ongoing costs.
Onsite gym
Professional Development Benefits
Job training & conferences
All Klaviyos are reimbursed up to $3000 through our learning stipend to use for certifications, trainings, conferences and courses. You can also use your learning stipend to learn a new language!
Tuition reimbursement
All Klaviyos are reimbursed up to $3000 through our learning stipend to use for certifications, trainings, conferences and courses.
Lunch and learns
Klaviyo hosts weekly Munch 'n Learns, which are open to all employees.
Promote from within
Mentorship program
All new Klaviyos are given a K-buddy mentor in their first week to help them adjust to all things Klaviyo.
Continuing education stipend
All Klaviyos are reimbursed up to $3000 through our learning stipend to use for certifications, trainings, conferences and courses.
Online course subscriptions available
Customized development tracks
Paid industry certifications
All Klaviyos are reimbursed up to $3000 through our learning stipend to use for certifications, trainings, conferences and courses.

Additional Perks + Benefits

At Klaviyo, we believe everyone should have access to coaching: that's why we offer confidential mental, financial, professional, physical and social coaching to every Klaviyo through Modern Health. Klaviyos are inherently curious, which is why we offer all employees our Klaviyo Books Program - if you want to read it, we'll pay for it! From Harry Potter, to Learn Python the Hard Way, to Dare to Lead, we've got you covered.

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