Software Engineer I at Klaviyo in Boston, MA

Job description

• 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.

Responsibilities

• Own features that our 180K+ paying customers rely on daily to reach their consumers and grow their business.
• Take responsibility for the mission, technical direction, and operation of projects with immediate impact.
• Own the full lifecycle of your code: writing it, testing it, shipping it, and making it better over time. Ownership is expected here, not just encouraged.
• Build and ship features that meet a high bar and grow your technical skills while you do it.
• Get hands-on debugging real issues, both locally and in production.
• Contribute to documentation and support your team during incidents (real-world problems teach you things a tutorial never will).
• Work closely with your teammates: ask questions, share ideas, and get better by taking feedback seriously.
• Learn to use the right tool for the job, lean into AI, and keep looking for ways to make things better.
• Put AI at the center of how you work to move faster. Build smarter systems and better workflows from the ground up.

Requirements

• Two previous internship/co-op roles working with production-level code
• Currently pursuing a degree in Computer Science, Engineering, Data Science, Math/Statistics, or a related field
• Graduating in December 2026 or May/June 2027
• Python, Django, Typescript, React, Go
• MySQL, Cassandra, Clickhouse, Kafka, Redis
• Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform
• You enjoy working across new technologies and you’re excited to work across the stack from back-end to front-end work
• You give and take feedback directly. Klaviyos pull problems closer instead of avoiding them.
• You're comfortable moving forward before every answer is known, and you adjust fast when the ground shifts under you.
• You embrace Klaviyo's "always learning" culture, continually pushing yourself to grow as an engineer.
• You've already experimented with AI in work or personal projects, and you're excited to find ways to make your work smarter and more efficient.

Skills

Required

• Python
• Django
• Typescript
• React
• Go
• MySQL
• Cassandra
• Clickhouse
• Kafka
• Redis
• Terraform

Benefits

• 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.
• $104,000 - $156,000 USD