Software Engineer I
Klaviyo Campus · Boston, MA ·
- Seniority
- Intern
- Employment
- Internship
- Category
- Software engineering
- Visa sponsorship
- No
- Salary
- USD 104,000 – 156,000 / year
Klaviyo Campus · Boston, MA ·
Klaviyo · Boston, MA
Klaviyo · Boston, MA
Klaviyo · Boston, MA
Klaviyo · Dublin, IE
Entry-level (new grad) Software Engineer at Klaviyo in Boston: you own features end to end — writing, testing, documenting, deploying, and operating production code on a full-stack, back-end, or front-end team. Stack includes Python/Go, TypeScript/React, and data infra like Kafka, Cassandra, Redis, and AWS, with an AI-first way of working.
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.
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What's it like to ship code that thousands of people actually use? As a Software Engineer at Klaviyo, you'll find out fast. We're builders here: we run toward problems, hold ourselves to a high bar, and believe the work itself is the reward. Another payoff of this early career role is growth. You'll sharpen your skills, learn from engineers who've been in the trenches, and get your hands on projects that matter from day one.
Our engineering teams build scalable, high-performance systems that power both our product and the infrastructure behind it. In this role, you'll get exposed to modern infrastructure and engineering practices that allow you to grow as a software engineer. We're an AI-first company, so you'll be expected to use AI tools to move faster, learn quicker, and do better work.
You'll have ownership: writing and testing code, documenting it, deploying it, and keeping it running in production. If you're ready to launch your engineering career building systems that matter in a fast-moving, product-driven environment, this is your role.
Dec 2026 grads: start dates on a rolling basis.
Spring 2027 grads: start dates June–August.
How you'll make an impact
Who you are
Engineering at Klaviyo
Our engineering teams are organized into pillars to keep the work focused. All Software Engineer I offers are team agnostic. Team placement occurs ~ 30-day pre-start. Placement can be on a full-stack, back-end, or front-end team within any of the pillars.
If you're excited about this role but your background doesn't check every box, apply anyway. Some of the strongest Klaviyos didn't start with a perfect resume match.
This role is not eligible for immigration sponsorship.
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.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
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.
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.
Klaviyo · Boston, MA