HappyCo - Senior Engineer, Platform

• 6+ years of professional software engineering experience • Technologies Used: Golang, Ruby on Rails & Rust • Strong experience building platform services, APIs, or infrastructure systems • Experience improving system reliability, observability, and performance • Demonstrated experience working on distributed systems or complex backend platforms • Ability to own problems from design through production outcomes • Strong collaboration skills working across engineering and product teams • Experience designing graph-based data models or complex domain modeling • Experience building developer platforms, plugin frameworks, or extensibility systems • Background working with integration-heavy SaaS platforms • Experience improving operability and observability of production systems • Familiarity with cloud-native architecture and distributed systems • How we measure success • Contribute to at least one roadmap-critical platform milestone • Participate in incident response with documented prevention improvements • Deliver one measurable application performance improvement • Longer-Term Success • Platform roadmap milestones land with lower execution risk • Fewer reliability regressions across key integration and API paths • Faster cross-team delivery of growth and retention initiatives • Clear improvements in system performance, observability, and reliability • Keys to optimum happiness at HappyCo • Thrives in ambiguity and proactively builds clarity • Focuses on long-term impact over quick wins • Enables others through systems, not mandates • Leverages technology and AI to empower people and simplify complexity • Embraces the challenges and rewards of growing in a scaleup environment • Timeline Expectations • Learn the current platform architecture, core service boundaries, and deployment/runtime model • Build context on high-impact integration pathways, API surfaces, and reliability pain points • Get productive with our observability patterns and incident workflow • Own and ship at least one scoped improvement to an API or integration surface with measurable impact on reliability, throughput, or operability • Improve instrumentation and alerting for an existing platform workflow • Participate in at least one incident with documented prevention follow-through • Lead a meaningful cross-team implementation slice in platform scope and ship iteratively • First 12 months: • Platform milestones land with lower execution risk; fewer reliability regressions on key integration and API paths • Faster cross-team delivery of growth and retention priorities • Raised bar on operational quality through documentation, standards, and collaborative execution