Principal Technical Architect

Lennox (NYSE: LII) delivers industry-leading climate-control solutions built on 130 years of HVAC and refrigeration expertise. We serve residential and commercial customers with innovative, sustainable products and services, fostering a collaborative culture where every team member’s contributions are valued. As a global community, Lennox supports career growth and offers a welcoming environment for all employees.

About the role

We are seeking a highly technical, hands-on Technical Architect to lead the design and delivery of next-generation enterprise IoT platforms with an AI-first engineering mindset. This role is based in Stone Mountain, GA, and requires onsite attendance five days a week (Monday–Friday). You will architect scalable, secure, resilient, and cloud-native solutions while actively contributing to software design, development, and technical problem-solving. The position demands deep Java engineering expertise, strong architectural vision, and the ability to lead through influence.

Responsibilities

• Design scalable, reliable, secure, and fault-tolerant enterprise systems across distributed applications, integration, data, and cloud-native layers.
• Define architecture patterns for AI-native capabilities, APIs, event-driven services, observability, resiliency, and performance at enterprise scale.
• Evaluate technology options and define pragmatic technical direction across cloud, APIs, event-driven services, integrations, observability, and automation.
• Spend 50%+ of time on hands-on technical work, including coding, design reviews, debugging, performance tuning, AI-assisted development, and complex issue resolution.
• Translate business and product needs into practical architecture decisions, technical roadmaps, and delivery-ready engineering plans.
• Write production-quality code daily in Java and/or Python, while guiding implementation across TypeScript/JavaScript, React, APIs, and distributed platform services.
• Guide engineers through complex design and implementation trade-offs, ensuring solutions remain practical, supportable, and delivery-ready.
• Lead technical staff through architecture execution, sprint delivery, code reviews, quality gates, and production readiness activities.
• Partner with product owners, business stakeholders, architects, QA, DevOps, and infrastructure teams to align technical delivery with business outcomes.
• Own technical delivery risks, remove engineering blockers, and ensure designs are implemented with measurable quality, reliability, and performance outcomes.
• Design enterprise-grade integration patterns across internal systems, external platforms, APIs, data pipelines, and real-time/event-driven architectures.
• Understand infrastructure layers from Kubernetes and cloud-native runtime operations to GPU inference stacks, model-serving patterns, and scalable workload deployment.
• Ensure solutions are observable, secure, resilient, cost-aware, and supportable in production environments.
• Establish strong practices across automated testing, CI/CD, observability, rollout safety, incident response, production support, and operational excellence.
• Create reusable technical patterns, reference architectures, documentation, and engineering playbooks to standardize delivery across teams.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related technical discipline. Master’s degree preferred.
• 10+ years of experience building and operating enterprise software, including:
  • 8+ years of hands-on Java engineering experience with deep expertise in JVM internals, compiler behavior, concurrency, memory management, and performance optimization.
  • 5+ years leading enterprise architecture across applications, cloud-native platforms, APIs, integrations, data, and highly available production systems.
• Proven experience designing scalable, reliable, secure, fault-tolerant, and production-ready enterprise platforms, including distributed systems, IoT platforms, Building Management Systems (BMS), connected devices, and telemetry environments.
• Strong architecture experience with microservices, APIs, event-driven architecture, integration patterns, DevSecOps, observability, and cloud-native engineering.
• Hands-on experience developing modern full-stack and platform solutions using technologies such as Java, TypeScript/JavaScript, React, Python, Go, APIs, and distributed infrastructure.
• Experience applying AI-native development practices, AI/ML or GenAI services, automation frameworks, intelligent system design patterns, and AI-assisted engineering tools (e.g., Claude Code, GitHub Copilot).
• Familiarity with multi-agent AI systems, Model Context Protocol (MCP) integrations, agent-to-agent communication, and emerging AI orchestration frameworks.
• Proven ability to lead highly technical engineering teams while remaining hands-on with architecture, software design, coding, code reviews, troubleshooting, mentoring, and delivery execution.
• Demonstrated ability to establish technical direction, drive architecture quality, ensure production readiness, and lead engineering execution across cross-functional teams.
• Strong communication, collaboration, and decision-making skills with the ability to navigate ambiguity, evaluate technical tradeoffs, and deliver high-impact solutions.

Pay

The starting salary range for this role is $134,000–$176,400 annually, depending on geography, market, skills, education, experience, and other qualifications. Eligible employees are also part of an annual bonus plan. This is a salaried exempt role and does not qualify for overtime.

Benefits

• Tuition reimbursement.
• Medical, dental, and vision insurance; prescription drug coverage.
• 401(k) retirement plan.
• Short-term disability insurance.
• 8 weeks paid birthing leave; 2 weeks paid bonding leave.
• Life and long-term disability insurance.
• Up to 12 days paid time off, 2 paid well-being days, 1 paid volunteer day, 12 paid holidays, and 3 floating holidays per year (eligibility and accrual depend on hire date).