Principal Software Engineer, Enterprise Scalability
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Job Location:
Boston, NH - USA
Monthly Salary:
Not Disclosed
Posted on:
2 days ago
Vacancies:
1 Vacancy
Job Summary
Be Klaviyos senior IC for scale you will report into a VP of Engineering and lead performance reliability multiregion and largetenant readiness. Youll drive platform-wide architectural change hunt bottlenecks and optimize systems and partner across teams to productionize improvements. Given that this is an IC role with no direct reports; you will lead via technical depth handson impact and crisp crossorg alignment.
What Youll Do
- Define enterprise scalability fitness functions (latency/throughput/error rates) and a scorecard; align teams to SLOs and budgets.
- Design/implement sharding and partitioning strategies caching/backpressure multiregion readiness and highvolume migration paths.
- Build lightweight enablement: benchmarks profiling harnesses reproducible testbeds; pair with teams to land fixes.
- Lead scalability reviews and readiness gates that acceleratenot blockdelivery; drive incident deep dives tied to systemic fixes.
- Communicate clearly to execs and engineers tying technical work to business impact and customer outcomes.
- Integrate AI into scale and resiliency workfrom proactive anomaly detection to synthetic load and guided runbooksso performance improvements stick and incidents dont repeat.
Who You Are
- Experience: 12 years scaling multitenant SaaS with a reputation for removing major bottlenecks and proving impact with data.
- Technical expertise: Performance engineering capacity planning sharding/partitioning caching/backpressure multiregion readiness and highvolume migrations; you turn hotspots into robust patterns.
- AI tools & automation: You apply AI to scale workprofiling assistance workload modeling synthetic traffic generation anomaly detection and runbook copilotsalways with explicit guardrails and observability.
- Crossorg influence: You align teams through fitness functions scorecards and readiness gates that acceleratenot blockdelivery; you communicate tradeoffs crisply to execs and engineers.
- AI fluency: Curious adaptable and proactive in exploring AI that responsibly improves scale outcomes.
Nice to Haves
- Scale scorecard: Companywide fitness functions (latency/throughput/error rates) are adopted and reviewed regularly.
- Highimpact wins: 23 bottlenecks removed with documented reproducible testbeds; pXX latencies and error rates improve on top enterprise workloads; repeat P0s trend down.
- AIassisted scale engineering: AIdriven anomaly detection reduces alert noise while improving signal; generative load testing and copilot runbooks are used in release/readiness checks for the top critical services; timetoisolate regressions drops 2030%.
Success in 612 Months
- Companywide scale scorecard in place; 23 highimpact bottlenecks removed; top enterprise workloads show improved pXX latencies and error rates; fewer repeat P0s.
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Required Experience:
Staff IC
Key Skills
- Continuous Integration
- Docker
- Jenkins
- Python
- System Design
- Agile
- C/C++
- Go
- Systems Engineering
- Software Development
- Java
- Distributed Systems
About Company
Klaviyo unifies AI-powered email marketing and SMS to drive growth, retention, and measurable results. Build personalized, omnichannel experiences across WhatsApp, ecommerce, and more with K:AI Agents.
