Backend Software Engineer Jobs at Klaviyo with Visa Sponsorship
Klaviyo's backend engineering teams work on high-scale data infrastructure, API systems, and platform reliability for a global marketing automation product. The company has an established process for sponsoring work visas across its engineering functions, making it a realistic target for international backend engineers building a U.S. career.
See All Backend Software Engineer at Klaviyo JobsOverview
Showing 5 of 48+ Backend Software Engineer Jobs at Klaviyo jobs


Have you applied for this role?


Have you applied for this role?


Have you applied for this role?


Have you applied for this role?


Have you applied for this role?
See all 48+ Backend Software Engineer Jobs at Klaviyo
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Backend Software Engineer Jobs at Klaviyo.
Get Access To All Jobs
INTRODUCTION
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. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.
ABOUT THE JOB
Why You Should Join the Onboarding Team
The Product Expansion / Activation team at Klaviyo is focused on improving the early experience of Klaviyo for new customers. We work diligently to improve the rate at which customers are successfully setting up their Klaviyo account and gaining value from the platform. Engineers on the team use data to discover opportunities for improvement, implement A/B tests to validate ideas, and work across the product to iteratively improve UX and reduce friction for new customers. We are looking for great generalist software engineers with a passion for the experience-layer that have an interest in or experience with growing a user-base and building a great customer onboarding pipeline and experience.
HOW YOU WILL MAKE A DIFFERENCE
- In this role, you will implement user-experience improvements across the Klaviyo product, especially in areas that affect new customers.
- You will design and implement A/B tests to validate ideas, and interpret the results of these tests to inform iterative improvements to the product.
- You will collaborate with marketing, data-science, sales, and engineering teams to discover areas for improvement, as well as engaging with customers directly to learn more about how we can better serve their needs.
- You will help us improve our experimentation and development processes, and mentor other engineers on the team.
- You will clearly define the goal, constraints, and context for AI agents, while remaining responsible for the correctness of the implementation, with a focus on security, performance, and maintainability.
- Working from our Boston HQ at least three days a week.
WHO YOU ARE
- Have a background in full stack software engineering with experience building and improving products with an emphasis on user-facing features, along with the APIs and infrastructure to support them.
- Passionate about growing and improving a product on a daily basis using a data driven mindset.
- Experienced with A/B Testing products with metric based goals to improve user experience and customer acquisition and success (nice to have).
- Demonstrated ability and success in using AI-driven software delivery practices and methods and/or a willingness and excitement to learn.
- Thrives in an entrepreneurial type environment that is fast paced, customer focused, and strategic.
TECHNOLOGIES WE USE
HTML, TypeScript, JavaScript, React
Python, Django
MySQL, Cassandra, RabbitMQ, Redis
Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Ansible, Packer, and other DevOps tools
COMPENSATION
- Base Pay Range For US Locations: $116,000—$174,000 USD
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.
GET TO KNOW KLAVIYO
We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.
AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.

INTRODUCTION
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. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.
ABOUT THE JOB
Why You Should Join the Onboarding Team
The Product Expansion / Activation team at Klaviyo is focused on improving the early experience of Klaviyo for new customers. We work diligently to improve the rate at which customers are successfully setting up their Klaviyo account and gaining value from the platform. Engineers on the team use data to discover opportunities for improvement, implement A/B tests to validate ideas, and work across the product to iteratively improve UX and reduce friction for new customers. We are looking for great generalist software engineers with a passion for the experience-layer that have an interest in or experience with growing a user-base and building a great customer onboarding pipeline and experience.
HOW YOU WILL MAKE A DIFFERENCE
- In this role, you will implement user-experience improvements across the Klaviyo product, especially in areas that affect new customers.
- You will design and implement A/B tests to validate ideas, and interpret the results of these tests to inform iterative improvements to the product.
- You will collaborate with marketing, data-science, sales, and engineering teams to discover areas for improvement, as well as engaging with customers directly to learn more about how we can better serve their needs.
- You will help us improve our experimentation and development processes, and mentor other engineers on the team.
- You will clearly define the goal, constraints, and context for AI agents, while remaining responsible for the correctness of the implementation, with a focus on security, performance, and maintainability.
- Working from our Boston HQ at least three days a week.
WHO YOU ARE
- Have a background in full stack software engineering with experience building and improving products with an emphasis on user-facing features, along with the APIs and infrastructure to support them.
- Passionate about growing and improving a product on a daily basis using a data driven mindset.
- Experienced with A/B Testing products with metric based goals to improve user experience and customer acquisition and success (nice to have).
- Demonstrated ability and success in using AI-driven software delivery practices and methods and/or a willingness and excitement to learn.
- Thrives in an entrepreneurial type environment that is fast paced, customer focused, and strategic.
TECHNOLOGIES WE USE
HTML, TypeScript, JavaScript, React
Python, Django
MySQL, Cassandra, RabbitMQ, Redis
Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Ansible, Packer, and other DevOps tools
COMPENSATION
- Base Pay Range For US Locations: $116,000—$174,000 USD
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.
GET TO KNOW KLAVIYO
We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.
AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.
See all 48+ Backend Software Engineer at Klaviyo jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Backend Software Engineer at Klaviyo roles.
Get Access To All JobsTips for Finding Backend Software Engineer Jobs at Klaviyo Jobs
Align your portfolio with Klaviyo's stack
Klaviyo's backend runs on Python and relies heavily on distributed systems, event-driven architecture, and large-scale data pipelines. Tailor your GitHub portfolio and resume to reflect hands-on experience with these before applying.
Target roles specifying H-1B sponsorship explicitly
Not every open role at Klaviyo is posted with identical sponsorship language. Filter for backend positions that confirm visa sponsorship in the job description so your application lands with a team already prepared for the filing process.
Time your application around H-1B cap deadlines
USCIS opens H-1B registrations in March each year for an October 1 start date. If you need cap-subject H-1B sponsorship, targeting Klaviyo in Q4 of the prior year gives you enough runway for offer, filing, and lottery selection.
Clarify your visa timeline in the offer stage
Once you have a verbal offer, ask the recruiter directly whether Klaviyo uses an in-house immigration team or outside counsel. This tells you how quickly the Labor Condition Application can be filed with DOL and sets realistic start date expectations.
Use Migrate Mate to track Klaviyo's open backend roles
Search Migrate Mate's job board filtered by Klaviyo and backend engineering to surface active roles with confirmed sponsorship. This saves time compared to manually monitoring Klaviyo's careers page across multiple posting cycles.
Prepare for green card conversations early
Klaviyo sponsors EB-2 and EB-3 green cards for engineering roles, which require PERM labor certification through DOL. Asking about green card sponsorship policy during the offer stage signals long-term commitment and helps you plan your immigration timeline realistically.
Backend Software Engineer at Klaviyo jobs are hiring across the US. Find yours.
Find Backend Software Engineer at Klaviyo JobsFrequently Asked Questions
Does Klaviyo sponsor H-1B visas for Backend Software Engineers?
Yes, Klaviyo sponsors H-1B visas for Backend Software Engineer roles. Backend engineering is a core function at Klaviyo, and the company has a consistent track record of supporting H-1B filings for this discipline. When reviewing job postings, look for explicit sponsorship language in the listing to confirm the specific role is included.
Which visa types does Klaviyo commonly use for Backend Software Engineer roles?
Klaviyo sponsors H-1B visas for backend engineers requiring nonimmigrant work authorization. For longer-term pathways, the company also supports EB-2 and EB-3 immigrant visa categories, which involve PERM labor certification filed with the Department of Labor. The right visa type depends on your current immigration status, country of birth, and career stage.
What qualifications and experience does Klaviyo expect for Backend Software Engineer roles?
Klaviyo's backend engineering roles typically require strong Python proficiency, experience building and maintaining distributed systems, and familiarity with high-volume data processing. Roles closer to senior level also expect experience with API design and platform reliability at scale. A computer science degree or equivalent demonstrated engineering experience is standard for H-1B specialty occupation eligibility.
How do I apply for Backend Software Engineer jobs at Klaviyo?
You can browse and apply for Backend Software Engineer roles at Klaviyo through Migrate Mate, which filters for positions with confirmed visa sponsorship so you're not wasting time on listings that won't support your status. From there, applications go through Klaviyo's standard recruiting pipeline, which typically includes a recruiter screen, technical assessments, and a system design interview loop.
How do I manage my immigration timeline when targeting a role at Klaviyo?
If you're pursuing cap-subject H-1B sponsorship, Klaviyo needs to submit your registration during USCIS's March lottery window for an October 1 start. If you're already in H-1B status with another employer, Klaviyo can file an H-1B transfer, which allows you to start work as soon as USCIS receives the petition. Build at least 60 to 90 days into your timeline between offer acceptance and your target start date.
See which Backend Software Engineer at Klaviyo employers are hiring and sponsoring visas right now.
Search Backend Software Engineer at Klaviyo Jobs