Senior Software Engineer - Devx
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.
What this role actually needs.
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. Responsibilities: - 5+ years of experience in a software engineering discipline - Experience with full stack application development - Experience working with both monolithic and microservices architectures - Experience with CI/CD pipelines - Experience debugging performance issues and improving application performance - Python Requirements: - our Application directory, which is used to promote and allow Klaviyo customers to discover applications that they can enable for their account - the self-serve application process for a Partner to submit an Application and the ability for Klaviyo staff to review and approve an Application - API Analytics is a system used by developers and partners to diagnose issues in their applications and understand their API usage. It is powered by a near real–time data pipeline that processes over 160,000 events per second. - Autogenerated API docs, SDKs, CLIs & MCP servers - 5+ years of experience in a software engineering discipline - Experience with full stack application development Company context: Klaviyo is the public marketing automation and CDP company powering email, SMS, and AI personalization for ecommerce.
Day-to-day expectations
Klaviyo lists these responsibilities for the Senior Software Engineer - Devx role.
- 5+ years of experience in a software engineering discipline
- Experience with full stack application development
- Experience working with both monolithic and microservices architectures
- Experience with CI/CD pipelines
- Experience debugging performance issues and improving application performance
- Python
What a strong candidate brings
These requirements are extracted from the source listing and normalized for UpJobz readers.
- our Application directory, which is used to promote and allow Klaviyo customers to discover applications that they can enable for their account
- the self-serve application process for a Partner to submit an Application and the ability for Klaviyo staff to review and approve an Application
- API Analytics is a system used by developers and partners to diagnose issues in their applications and understand their API usage. It is powered by a near real–time data pipeline that processes over 160,000 events per second.
- Autogenerated API docs, SDKs, CLIs & MCP servers
- 5+ years of experience in a software engineering discipline
- Experience with full stack application development
Why this listing is more than a copied job post.
Senior Software Engineer - Devx is framed against UpJobz source checks, country scope, compensation visibility, and work-authorization signals so candidates can make a faster go/no-go decision.
United States tech market
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Compensation read
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Work authorization read
Current extracted signal: Open to TN, H-1B, and OPT candidates already in the United States. UpJobz treats this as a search signal, not legal advice, and links visa-sensitive roles back to the relevant visa hub where possible.
Location read
On-site roles in Boston should be compared against commute, local salary bands, and nearby employer demand.
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Next moves
- Tailor your resume around ai and python instead of sending a generic application.
- Use the first two bullets of your application to connect your background directly to senior software engineer - devx is a high-signal on-site role in boston, and it is most realistic for open to tn, h-1b, and opt candidates already in the united states.
- Open the role quickly if it fits and bookmark three similar jobs before you leave the page.
Interview themes
Watchouts
- Compensation is hidden, so get range clarity in the first recruiter conversation.
- Use open to tn, h-1b, and opt candidates already in the united states as part of your positioning so the recruiter does not have to infer it.
- Show concrete examples of succeeding in on-site environments.
Keywords to match against your background
Use these terms to decide whether your resume, portfolio, and recent projects line up with the role.
Apply through the employer source
Open the source listing from klaviyo.com, confirm the role is still active, then apply on the employer or ATS page.
Source: klaviyo.com · Source ID: 7548895003 · Confidence: 88/100 · Last checked: May 7, 2026
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