Principal Java Technical Architect
About the job
- A bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related technical discipline is required; a master's degree is preferred.
- At least 10 years of experience building and operating enterprise software.
- At least 8 years of hands-on Java engineering experience, including expertise in JVM internals, compiler behavior, concurrency, memory management, and performance optimization.
- At least 5 years leading enterprise architecture across applications, cloud-native platforms, APIs, integrations, data, and highly available production systems.
- Experience designing scalable, reliable, secure, fault-tolerant, production-ready enterprise platforms in at least one of these areas: distributed systems, IoT platforms, Building Management Systems (BMS), connected devices, or 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 Java, Python, 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 such as Claude Code, GitHub Copilot, or similar platforms to accelerate software delivery.
- Familiarity with multi-agent AI systems, Model Context Protocol (MCP) integrations, agent-to-agent communication, and emerging AI orchestration frameworks.
- Ability to lead highly technical engineering teams while remaining hands-on with architecture, software design, coding, code reviews, troubleshooting, mentoring, and delivery execution.
- Ability to establish technical direction, drive architecture quality, ensure production readiness, and lead engineering execution across cross-functional teams.
- 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 at least 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 APIs and distributed platform services.
- Guide engineers through complex design and implementation trade-offs while 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 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.
- A master's degree is preferred.
About the company
Lennox International provides climate control solutions for homes and businesses across three segments: Residential Heating & Cooling, Commercial Heating & Cooling, and Refrigeration. It designs, manufactures, and sells HVAC and refrigeration products that heat, cool, ventilate, and control indoor environments. The company differentiates itself through vertical integration of manufacturing and distribution and by serving customers through direct sales, distributors, and company-owned parts stores, giving it broad reach. Its goal is to deliver reliable, efficient climate control and steady growth across its diversified product lines and channels.
Company Size
1,001-5,000
Company Stage
IPO
Headquarters
Richardson, Texas
Founded
1895
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Simplify's Take
What believers are saying
- September 3, 2026 training-center opening addresses technician shortages and supports national-account service continuity.
- June 18, 2026 Heat Controller acquisition broadens Lennox's product lineup and distributor relationships.
- Q1 2026 building climate solutions grew organically 26%, offsetting weaker residential demand.
What critics are saying
- July 29, 2026 Q2 revenue missed estimates, and management blamed continued residential softness.
- March 20, 2026 HVAC antitrust class actions accuse Lennox of price-fixing across the industry.
- August 2026 securities-law investigations follow the July 29 guidance miss and 20% stock drop.
What makes Lennox International unique
- Lennox's vertically integrated manufacturing-distribution network protects margins and speeds parts availability.
- June 18, 2026 Heat Controller expands Lennox's distributor portfolio and value-tier equipment reach.
- September 3, 2026 Fort Lauderdale NAS training center deepens field service capabilities and customer lock-in.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
Life Insurance
Disability Insurance
401(k) Company Match
401(k) Retirement Plan
Paid Vacation
Paid Sick Leave
Paid Holidays
Hybrid Work Options
Mental Health Support
Employee Stock Purchase Plan
Tuition Reimbursement
Unlimited Paid Time Off
Company News
Lennox International (LII) hit a 52-week low of $340.32 on Tuesday, its 24th in the past 12 months. The heating and cooling specialist's shares are down 47% from their all-time high of $689.44 and 34% over the past year. Commercial business now makes up 41% of revenue, up from 25% in 2016. Building Climate Solutions' operating margin rose 630 basis points to 23.4% in 2025, while Home Comfort Solutions' improved 370 basis points to 21.8%. Between 2023 and 2025, the company generated $1.91 billion in free cash flow, 86% of its net income. It expects about $800 million in 2026 and has $858 million left on its share repurchase plan. Its enterprise value-to-EBIT multiple is 13.59x, against a 10-year average of 20.11x. Most analysts rate the stock Hold.
StockStory has named one S&P 500 stock to watch and two to avoid, saying that a place in the index doesn't guarantee a strong business. It advises selling Skyworks Solutions, a chip maker with a $11.52 billion market cap. Sales fell 4.2% annually over the past two years and are projected to stay flat over the next 12 months. Operating profits have dropped over five years, and the stock trades at 13.9x forward P/E. It also steers clear of Sysco, a food distributor worth $38.88 billion. Unit sales growth averaged 0.9% over two years, free cash flow margin is projected to stall, and returns on capital are diminishing. The shares trade at 15.5x forward P/E. Its pick is Lennox, a $12.1 billion heating and cooling company. It has a 17.7% operating margin, a 37.3% return on capital, and a free cash flow margin that rose 8.6 percentage points over five years.
Lennox has opened a new National Account Services headquarters and training centre in Fort Lauderdale, Florida, to address the commercial HVAC technician shortage. The facility features a 6,000-square-foot training space where technicians receive hands-on instruction with commercial HVAC equipment and systems. The centre supports multiple career pathways, including skilled technician, advanced technician, lead master and manager-in-training programmes. Lennox NAS also operates a Build-A-Tech apprenticeship programme, which has trained nearly 1,600 technicians since 2016. The company is additionally constructing an 18,000-square-foot commercial HVAC experience and training centre near its Richardson, Texas headquarters. These investments aim to develop workforce skills whilst supporting consistent service delivery for national account customers across the United States.
Why Lennox (LII) stock is down today. Petr huřťák /. July 29, 2026 What happened? Shares of climate control solutions innovator Lennox International (NYSE:LII) fell 20.1% in the afternoon session after the company reported second-quarter results that missed revenue estimates and provided a full-year profit forecast that fell short of Wall Street's expectations. Lennox's revenue for the quarter was $1.55 billion, slightly below the $1.56 billion analysts had expected. The primary driver for the stock's decline appeared to be the full-year earnings per share (EPS) guidance. The company's forecast, with a midpoint of $23.50, missed analyst consensus estimates by 4.7%. The combination of failing to meet current revenue targets and providing a disappointing outlook for future profits prompted the negative reaction from investors. The stock market overreacts to news, and big price drops can present good opportunities to buy high-quality stocks. Is now the time to buy Lennox? Access our full analysis report here, it's free. What is the market telling us. Lennox's shares are not very volatile and have only had 7 moves greater than 5% over the last year. Moves this big are rare for Lennox and indicate this news significantly impacted the market's perception of the business. The biggest move we wrote about over the last year was 5 months ago when the stock dropped 5.1% on the news that the broader market tumbled in morning trading as geopolitical tensions in the Middle East sent crude oil prices soaring above $100 a barrel. The unease among investors stemmed from the U.S.-Israel conflict with Iran, which intensified concerns over severe supply chain disruptions. With oil prices breaching the key psychological barrier of $100, major indices like the Dow Jones Industrial Average, S&P 500, and Nasdaq all opened significantly lower. The uncertainty weighed on the economic outlook, with Goldman Sachs cutting its growth forecast and citing a 25% chance of a recession in the next year. This risk-off sentiment reflected fears that sustained high energy prices could fuel inflation and dampen economic activity, prompting investors to pull back from equities. Lennox is down 11.4% since the beginning of the year, and at $441.57 per share, it is trading 31% below its 52-week high of $639.52 from July 2025. Despite the year-to-date decline, investors who bought $1,000 worth of Lennox's shares 5 years ago would now be looking at an investment worth $1,323. ALSO WORTH WATCHING: Nvidia's Quiet Partner. Nvidia's chips cost a hundred grand. The connectors that make them work cost even more. One company makes them all. Every AI server needs specialized infrastructure the chip companies don't make. High-speed cables. Power connectors. Thermal sensors. This 90-year-old company built a monopoly on it. The AI boom just started. This stock is still flying under the radar. Claim The Stock Ticker Here for FREE.
Lennox International stock plummeted 19.9% Wednesday morning following mixed second-quarter earnings results. The HVAC manufacturer exceeded earnings expectations at $7.72 per share versus the forecast $7.61, but revenue fell short at $1.5 billion compared to analysts' expected $1.6 billion. The company grew Q2 sales 3% year over year, but operating profit rose only 2%. Management cited "continued softness in the residential end market", with Home Comfort Solutions sales declining 7% despite price increases. Lennox lowered its full-year earnings forecast by approximately 3% to $23–24 per share, below Wall Street's $24.52 expectation. The company maintained its 2026 sales growth forecast of 8%, though only 3% represents organic growth whilst 5% comes from acquisitions.