Senior Fullstack Engineer building scalable APIs, distributed systems, and AI workflows for Postscript’s Shopify messaging platform. Driving reliable, data-intensive infrastructure for e-commerce revenue growth.
Responsibilities
Take ownership of systems and product areas and become the go-to technical expert
Investigate, design, and execute solutions across distributed systems
Architect, build, and maintain highly available, scalable REST APIs and backend services
Drive system decoupling, modularization, and technical debt reduction
Build agentically using concurrent autonomous agent workflows and own the output
Stay current with emerging AI tooling and practices and share techniques with the team
Help shape how AI is integrated into engineering systems and workflows
Collaborate with product, data, and go-to-market teams in an async-first environment
Identify and eliminate single points of failure and improve system resilience and knowledge redundancy
Improve engineering workflows through better tools and internal utilities
Requirements
6+ years of experience building large-scale data-intensive backend systems and APIs
Active, daily use of AI coding tools such as Claude Code, Codex, Cursor, Copilot, or equivalent
Proficiency in some or all of Python, Go, Rust, React, and TypeScript
Close following of AI tooling landscape, model releases, agentic workflows, and best practices
Ability to critically evaluate AI output, identify risks, and verify results
Ability to context switch quickly across concurrent workstreams
Experience with 0-to-1 initiatives and complex existing systems
Working knowledge of event-driven distributed systems and Kafka
Familiarity with distributed data processing technologies such as Flink or Spark
Experience growing systems under production customer load, ideally to multi-terabyte scale
Experience designing high-scale systems on AWS with RDBMS, OLAP, NoSQL, and other database technologies
Knowledge of relational data modeling, index strategies, and performant SQL for transactional and analytical workloads
Experience with infrastructure as code such as Terraform
Familiarity building and observing applications on AWS and Kubernetes, ideally with Datadog, Signoz, or comparable observability tooling
Clear, direct communication and proactive information sharing in cross-functional and async teams
Strong technical tradeoff judgment informed by engineering best practices and business priorities
Benefits
Significant equity
High growth startup with opportunity to directly impact the company and grow your career
Work from home (or wherever in US / Canada)
Competitive compensation and opportunity for equity
Senior Implementation Consultant delivering Prophix One FP&A and CPM implementations for enterprise finance teams. Leading client configuration, training, stakeholder engagement, and end - to - end project delivery.
Pension consultant implementing Canadian defined - benefit plan systems for Levio, a digital - transformation leader. Reviewing actuarial calculations, compliance, configuration, and testing.
Web Implementation Specialist leading client projects from requirements through launch. Delivering interactive websites, modules, and mobile applications for enterprise software clients.
Senior implementation consultant deploying Altera Sunrise EMR solutions for Canadian clinics. Configuring systems, optimizing workflows, and supporting healthcare go - lives.
Senior Customer Engineer guiding enterprise customers through Cloudflare’s Internet security and performance platform. Leading technical validation, adoption, expansion, and architectural advisory.
Senior Customer Engineer guiding enterprise customers through Cloudflare’s Internet security and performance solutions. Leading technical validation, onboarding, architecture, and account expansion.
Customer Engineer guiding enterprise clients through Cloudflare’s Internet security and performance platform adoption. Leading technical validation, onboarding architecture, and account expansion.
Technology Implementation Manager leading complex enterprise technology deployments for Sysco, the global foodservice distribution leader. Driving adoption, stabilization, stakeholder alignment, risk management, and delivery governance.