Klaviyo
Senior Software Engineer - Marketing Agent
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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. Want to learn more about life at Klaviyo? Visit careers.klaviyo.com to see how we empower creators to own their own destiny.
Why You Should Join the Marketing Agent Team:
Klaviyo's Marketing Agent team is building the next generation of intelligent tools that help businesses craft and execute powerful, personalized marketing strategies with minimal effort. This is a fast-paced, high-visibility initiative and powered by state-of-the-art technology. You'll be part of a team creating products that support Klaviyo's customers in driving key business outcomes through automated strategy generation.
As a Senior Software Engineer on this team, you'll focus on frontend development building dynamic, user-facing interfaces that simplify complex workflows. You'll partner closely with design, product, and data teams to build highly interactive, intuitive frontend experiences while contributing across the full stack. You'll help design, implement, and iterate on a new class of features that leverage AI, including LLMs and agentic workflows, to support marketing execution end-to-end.
How You Will Make a Difference:
Who You Are:
Technologies We Use:
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
Massachusetts Applicants:It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
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. Please visit Klaviyo Rewards to find out more about our Total Rewards package.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Base Pay Range For US Locations:
$152,000 - $228,000 USD
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.
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.
IMPORTANT NOTICE: Our company takes the security and privacy of job applicants very seriously. We will never ask for payment, bank details, or personal financial information as part of the application process. All our legitimate job postings can be found on our official career site. Please be cautious of job offers that come from non-company email addresses (@klaviyo.com), instant messaging platforms, or unsolicited calls.
By clicking "Submit Application" you consent to Klaviyo processing your Personal Data in accordance with our Job Applicant Privacy Notice. If you do not wish for Klaviyo to process your Personal Data, please do not submit an application.
Why You Should Join the Marketing Agent Team:
Klaviyo's Marketing Agent team is building the next generation of intelligent tools that help businesses craft and execute powerful, personalized marketing strategies with minimal effort. This is a fast-paced, high-visibility initiative and powered by state-of-the-art technology. You'll be part of a team creating products that support Klaviyo's customers in driving key business outcomes through automated strategy generation.
As a Senior Software Engineer on this team, you'll focus on frontend development building dynamic, user-facing interfaces that simplify complex workflows. You'll partner closely with design, product, and data teams to build highly interactive, intuitive frontend experiences while contributing across the full stack. You'll help design, implement, and iterate on a new class of features that leverage AI, including LLMs and agentic workflows, to support marketing execution end-to-end.
How You Will Make a Difference:
- Design and build complex, interactive UIs for reviewing, editing, and launching AI-generated marketing strategies that leverage the Klaviyo platform.
- Collaborate with cross-functional partners to rapidly iterate and experiment with user experiences.
- Lead implementation of end-to-end features, ensuring high-quality, performant frontend and backend systems.
- Drive project execution, contribute to technical design discussions, and own meaningful portions of the platform.
- Integrate AI tooling where appropriate, helping to shape Klaviyo's AI product direction.
Who You Are:
- Experienced full stack engineer with a frontend emphasis-proficient in React, TypeScript, and modern state management libraries (e.g., Redux, Zustand).
- Skilled in backend development using Python, with knowledge of API design and cloud environments (preferably AWS).
- Strong communicator and collaborator with a track record of cross-functional leadership and system design.
- Comfortable working autonomously, navigating ambiguity, and delivering high-quality results in fast-paced settings.
- (Nice to have) Familiar with AI production environments and tools such as LangChain, vector databases, and retrieval-augmented generation.
Technologies We Use:
- React, TypeScript, Zustand, Redux
- Python, API frameworks
- AWS, modern cloud services
- LLM tools and libraries (LangChain, vector DBs, etc.)
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
Massachusetts Applicants:It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
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. Please visit Klaviyo Rewards to find out more about our Total Rewards package.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Base Pay Range For US Locations:
$152,000 - $228,000 USD
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.
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.
IMPORTANT NOTICE: Our company takes the security and privacy of job applicants very seriously. We will never ask for payment, bank details, or personal financial information as part of the application process. All our legitimate job postings can be found on our official career site. Please be cautious of job offers that come from non-company email addresses (@klaviyo.com), instant messaging platforms, or unsolicited calls.
By clicking "Submit Application" you consent to Klaviyo processing your Personal Data in accordance with our Job Applicant Privacy Notice. If you do not wish for Klaviyo to process your Personal Data, please do not submit an application.
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