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Calendly is a scheduling automation platform helping businesses and individuals schedule meetings so they can work on “what’s really important.” More than a scheduling platfo
Staff Full Stack Engineer, Contacts
Location
United States
Posted
104 days ago
Salary
$218.1K - $331.0K / year
Seniority
Lead
Job Description
Staff Full Stack Engineer, Contacts
Calendly
• Own critical parts of our Contacts stack end-to-end, from technical design to rollout and ongoing reliability. • Guide the evolution from early-stage architecture to a scalable, well-instrumented, multi-tenant system that other teams can safely build on. • Lead big, cross-cutting “0–1 to 1–100” initiatives in partnership with Product, Design, and other Engineering teams • Raise the technical bar for the team through mentoring, eng leadership, and high-quality execution. • Design and evolve services and data models for contacts and relationships that can support new workflows and downstream consumers. • Drive decisions around our APIs, eventing, and data flows to keep Contacts a reliable system of record. • Own complex, high-impact projects (e.g., new ingestion pipelines, enrichment features, or contact-centric workflows) from technical discovery through launch and iterative improvement. • Break down ambiguous problem spaces into clear milestones and incremental, ship-as-you-go plans. • Provide technical leadership across squads and workstreams, helping teams make good tradeoffs on performance, reliability, and complexity. • Mentor senior and mid-level engineers, review design docs and PRs, and codify best practices in testing, observability, and production readiness. • Collaborate with PMs and designers to translate customer problems into pragmatic solutions, especially for solopreneurs and small teams adopting CRM for the first time. • Help define MVP scopes, instrumentation, and learning loops so we can move fast without compromising trust or data quality. • Define and improve SLOs, error budgets, and operational playbooks for Contacts services. • Participate in on-call, guide incident response, and drive durable corrective actions that reduce repeat issues.
Job Requirements
- Deep experience (typically 8–10+ years) building and operating backend or full-stack systems in B2B SaaS, with meaningful time at Staff level or higher.
- Proven track record leading 0–1 products and scaling them through maturity including making and revisiting foundational architectural decisions.
- Strong background in distributed systems, data modeling, and API design; experience with high-traffic, high-availability platforms is a plus.
- Fluency in at least one of our primary stacks (e.g., Go, TypeScript/Node, React) and comfort moving across the stack where needed.
- Experience with modern cloud infrastructure (GCP or similar), container orchestration (Kubernetes), and relational databases like PostgreSQL; familiarity with eventing, CDC, or search platforms is a plus.
- Strong testing discipline (unit, integration, and end-to-end), observability (logging, metrics, tracing), and performance tuning.
- Experience with CRMs, marketing/sales tooling, or other data-centric systems where data quality and trust matter.
- Comfort working in product-led environments, where you balance speed, quality, and learning (what to build now vs. later, and how to de-risk via MVPs and experiments).
- Demonstrated ability to incorporate customer signals and data into technical decisions.
- History of acting as an org-level technical leader - shaping strategy, influencing roadmaps, and aligning multiple teams around a coherent technical direction.
- Excellent written and verbal communication; comfortable bringing strong, opinionated recommendations into group settings while staying collaborative and low-ego.
- Experience mentoring and leveling up other engineers; you see your success through the impact of the teams around you.
- Availability to participate in an on-call rotation for business-critical services.
- Authorized to work lawfully in the United States (Calendly does not provide immigration sponsorship at this time).
Benefits
- Base salary is just one component of Calendly’s total rewards package
- All full-time (30 hours/week) employees are also eligible for our Top Performer Bonus program (or Sales incentive)
- Equity awards
- Competitive benefits
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