Principal Engineer, Enterprise Scalability

Location: Boston, MA, US; up to 10% travel may be required for onboarding, client or partner work, team meetings, and industry events.

Base salary for US locations: $244,000–$366,000 USD annually, plus potential bonus, equity, sign-on payments, and eligible benefits.

Company

hirify.global develops a first-party data platform that helps businesses build stronger customer relationships and supports personalized experiences in ecommerce and beyond.

What you will do

• Define measurable scale-readiness targets for latency, throughput, error rates, capacity, service-level objectives, and error budgets.
• Identify and remove major production bottlenecks using profiling, production data, benchmarks, and representative workloads.
• Design and implement sharding, partitioning, caching, back-pressure, tenant isolation, multi-region readiness, and high-volume migration strategies.
• Create reusable benchmarks, profiling harnesses, test environments, scalability reviews, and release gates.
• Lead technical incident deep dives, deliver systemic fixes, and improve reliability and recurring incident rates.
• Apply AI-assisted profiling, workload modeling, synthetic traffic, anomaly detection, and guided runbooks with appropriate guardrails.

Requirements

• 12+ years of relevant engineering experience with measurable production impact from removing significant bottlenecks.
• Hands-on experience with multi-tenant SaaS, performance engineering, capacity planning, sharding, partitioning, caching, back-pressure, tenant isolation, multi-region architectures, and large-scale migrations.
• Ability to investigate unfamiliar systems, test hypotheses, write production code, and roll out changes safely with service owners.
• Strong technical judgment and the ability to evaluate architectural tradeoffs using evidence.
• Ability to align teams across organizational boundaries, clarify ownership, and establish practical engineering standards.
• Clear communication of complex technical decisions and business implications to engineering and executive audiences.
• Practical experience applying AI tools or automation to engineering work, including evaluation of usefulness, limitations, and operational risks.
• Senior individual contributor role reporting to a VP of Engineering, with no direct reports.

Culture & Benefits

• Cross-team collaboration focused on customer experience, enterprise growth, platform reliability, and operating efficiency.
• Annual cash bonus plan, equity, potential sign-on payments, and comprehensive health, welfare, and wellbeing benefits based on eligibility.
• AI use is expected to be responsible, including attention to privacy, security, bias awareness, and human-in-the-loop controls.
• Equal opportunity workplace with accommodations available as needed.

Hiring process

• hirify.global uses Covey in its hiring and promotional processes and may provide job requirements and submitted applications to Covey.
• Participation in the interview process requires acknowledging hirify.global's guidelines for using AI during interviews.