Senior Engineer, Platform

HappyCo

10d

About The Position

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.

Requirements

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

Nice To Haves

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

Responsibilities

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
Build and improve APIs and plugin frameworks enabling partner integrations
Ensure integrations operate reliably across customer environments
Improve visibility and monitoring across integration workflows
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
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
Participate in incident response and root-cause analysis
Implement preventative improvements based on operational learnings
Ensure safe rollouts and strong production outcomes