Senior Engineer, Platform

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HappyCo is hiring a Senior Engineer, Platform to help scale the foundational systems that power our products and integrations. This role focuses on improving the reliability, performance, and extensibility of the platform while accelerating delivery of roadmap-critical initiatives.

The position plays a key role in three strategic initiatives:

Expand our Property Graph to unlock new product capabilities

Integration reliability and customer visibility to support mid-market adoption and retention

Plugin and API enablement to accelerate ecosystem expansion

This engineer will operate as a hands-on senior individual contributor, owning delivery across platform components including integrations, APIs, and extensibility surfaces. The role requires strong technical judgment, cross-team collaboration, and a focus on measurable production outcomes.

Platform Architecture & Development

Design, implement, and maintain scalable platform services and APIs

Lead delivery of roadmap-critical platform capabilities including Property Graph and integration surfaces

Evaluate architectural tradeoffs to ensure reliability, scalability, and extensibility

Integration & Ecosystem Enablement

Build and improve APIs and plugin frameworks enabling partner integrations

Ensure integrations operate reliably across customer environments

Improve visibility and monitoring across integration workflows

Reliability, Observability & Performance

Improve platform reliability, observability, and application performance

Use production telemetry and monitoring data to diagnose and resolve performance issues

Reduce operational overhead and improve system resilience

Cross-Team Collaboration

Work closely with Product Engineering leads and stakeholders to deliver platform capabilities

Support cross-team execution for growth and retention initiatives

Collaborate with product leadership and engineering stakeholders

Production Ownership

Participate in incident response and root-cause analysis

Implement preventative improvements based on operational learnings

Ensure safe rollouts and strong production outcomes

6+ years of professional software engineering experience

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

Contribute to at least one roadmap-critical platform milestone

Participate in incident response with documented prevention improvements

Deliver one measurable application performance improvement

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

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

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

Contribute to at least one roadmap-critical platform milestone

Participate in at least one incident with documented prevention follow-through

Deliver one measurable application performance improvement

Lead a meaningful cross-team implementation slice in platform scope and ship iteratively

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

Clear improvements in system performance, observability, and reliability

Raised bar on operational quality through documentation, standards, and collaborative execution