Jobs / United States / Klaviyo INC
Senior Software Engineer - Developer Infrastructure
Klaviyo INC · 🇺🇸 Boston, MA
Sponsorship verdict
Sponsorship possible
One solid signal, not two — worth applying, and worth asking about sponsorship early.
- Employer is on a government sponsor recordThe US Department of Labor certified 46 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 10 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
- The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
- No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
- What Klaviyo INC paid sponsored hires in similar roles30 certified filings for “Senior Software Engineer” (Software Developers) in MA: $131k–$178k, median $155k. Most were filed at wage level III (37%) — 3 lottery entries, ≈46% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).
- Confirmed live todayWhen a source last listed this job as open.
US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).
A verdict summarises public evidence; it is not legal advice and never a guarantee — the employer and the immigration authority decide. Sign in to factor in where you can already work.
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Sponsor Radar — Klaviyo INC
The US Department of Labor certified 46 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 10 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
Past sponsorship or register membership never guarantees sponsorship for this vacancy or for you. Full Sponsor Radar for Klaviyo INC →
About the role
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. Why You Should Join the Developer Infrastructure Team Our core focus is empowering engineers to ship code efficiently and safely. We own the build systems, dependency lifecycle, and platform infrastructure that underpin every engineer's daily workflow. As a Senior Software Engineer on this team, you will help define and execute the technical roadmap for Klaviyo's backend platform — from dependency management and major framework upgrades to developer productivity tools that reduce toil and accelerate velocity. By building and maintaining the foundational systems that keep our codebase healthy and scalable, you will play a pivotal role in ensuring every engineer at Klaviyo can move fast with confidence. What You'll Achieve: Key Responsibilities As a Senior Software Engineer for this team, you will drive the evolution of our developer platform across the organization: • Dependency Management: Analyze, optimize, and secure backend and third-party dependencies across the codebase. Build frameworks for evaluating risk and ensuring our dependency graph stays healthy, performant, and maintainable. • Platform Upgrades and Rollouts: Lead the planning and execution of major software releases and updates — from design through production rollout — including hands-on individual contribution throughout. • Developer Productivity: Drive improvements across key cycle time metrics including PR CI speed, code review turnaround, and commit velocity. Relentlessly reduce toil and increase engineering efficiency across the organization. • Set Engineering Standards: Contribute to the standards for code quality, dependency hygiene, and platform reliability that all teams follow. • AI-Driven Strategy: Spearhead efforts to leverage AI within the platform lifecycle and use AI tooling to accelerate your own development work. • Cross-Functional Collaboration: Partner with engineers, security teams, and stakeholders to gather requirements, resolve conflicts, and roll out platform changes that teams can adopt with confidence. • Operational Excellence: Proactively monitor the health and reliability of the platform, diagnosing and resolving complex issues before they become critical incidents. What Makes This Role Exciting: • High-Leverage Work: You are not just building features; you are building the systems that determine how fast every engineer at Klaviyo can ship. • Real Architectural Impact: You will influence the structure of a large, complex backend codebase and make decisions that scale with the company. • Innovation at the Edge: You will have the autonomy to experiment with AI and emerging tooling to solve hard problems in dependency management, build performance, and developer experience. Who You Are: • Experienced Engineer: You have 5+ years of software engineering experience with strong computer science fundamentals and a focus on clean, maintainable, well-architected code. • Analytical Problem Solver: You don't just fix symptoms — you hunt down root causes, implement systemic fixes, and build in safeguards to prevent recurrence. • Platform-Minded: You are comfortable reasoning about distributed systems, dependency graphs, and the downstream impact of platform-level decisions across many teams. • Technical Generalis