A

Amazon

Sells products online and rents cloud computing

Senior Thermal Design Engineer - Amazon Leo

Full-Time
$159.2k - $215.3k/yr+ Sign-on payments + Restricted stock units (RSUs)
Mid, Senior
Bachelor's, Master's, PhD
Redmond, WA, USA
In Person
Mechanical EngineeringThermal & Fluids Engineering
No H1B Sponsorship
US Citizenship Required

About the job

Requirements
  • A bachelor's degree in mechanical engineering or equivalent.
  • At least 5 years of experience leading cross-functional teams across engineering, operations, and field execution through launch readiness and go-live phases, or experience with simulation and 3D modeling software.
  • At least 2 years of experience with consumer electronics or similar hardware thermal design and delivering design solutions optimized for mass, cost, reliability, performance, and manufacturability.
  • At least 2 years of experience with test planning, test setup, results correlation, and system verification for production.
  • At least 2 years of experience developing and/or selecting thermal control hardware, including materials and finishes, thermal interface materials, MLI blankets, heat pipes, radiators, temperature sensors, and heaters.
  • Strong computational fluid dynamics experience using software such as ANSYS Fluent, Icepak, FloTHERM, or OpenFOAM.
  • Ability to run transient and steady-state heat transfer, multiphase computational fluid dynamics, finite element analysis, and thermos-mechanical analysis.
Responsibilities
  • Lead thermal design and analysis for consumer electronics products, ensuring high-quality deliverables are completed on time and efficiently.
  • Perform computational fluid dynamics simulations to evaluate and optimize thermal performance across product designs.
  • Develop and refine thermal design processes, methodologies, and best practices to drive continuous improvement.
  • Design, build, and validate thermal hardware prototypes to support product development milestones.
  • Deliver rapid thermal design input, trade-off analyses, and actionable recommendations to hardware architects and cross-functional teams.
  • Produce thermal analyses and documentation to support design reviews and decision-making.
  • Apply fundamentals in thermal engineering and materials science to solve complex design challenges.
  • Ramp up on spacecraft thermal design with coaching and mentorship, leveraging thermal and materials expertise.
  • Support thermal design for terrestrial equipment and systems with computational fluid dynamics analysis as appropriate.
  • Document trades and design evolution and prepare materials for design review gates.
  • Interpret and correlate data from ground tests and on-orbit telemetry.
  • Follow hardware components from conceptual design and detailed analysis through development testing, launch, and flight.
Desired Qualifications
  • Experience with Thermal Desktop, SINDA, ANSYS, and Python.
  • Experience designing, analyzing, manufacturing, testing, and integrating heat pipes for ground or space applications.
  • A master's or PhD in mechanical engineering or a related field.
  • Computer-aided design skills using NX or SolidWorks.
  • Experience developing thermal solutions for high power-flux components.

About the company

Amazon runs the largest online store in the United States and rents cloud computing to businesses and governments through Amazon Web Services. AWS pioneered renting computing power over the internet, and Amazon built its own delivery network to get orders to customers quickly. Shoppers buy from Amazon and from independent sellers on its store, and Prime members pay a subscription for fast free shipping, streaming video and music, and other perks. AWS rents out computing power, storage, databases, and AI tools so companies can run software without owning servers, and Amazon also makes Kindle e-readers and Echo speakers with the Alexa assistant. Jeff Bezos founded Amazon in 1994, and it is based in Seattle, Washington.

Company Size

10,001+

Company Stage

IPO

Headquarters

Seattle, Washington

Founded

1994

Get referred to Amazon

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • AI drives growth: AWS's AI and custom-chip sales each more than doubled, passing $25 billion a year by June 2026.
  • Stock grants gained value: shares hit a record in August 2026, making Amazon the fifth company to reach $3 trillion.
  • Ads are a third engine beside stores and AWS: they grew 26% to $19.8 billion in the June 2026 quarter.

What critics are saying

  • AWS's lead is shrinking: in the June 2026 quarter, Google Cloud grew 82% and Microsoft's Azure 43%, versus AWS's 37%.
  • Job security has slipped: Amazon cut 30,000 corporate jobs in October 2025 and January 2026 to reduce management layers.
  • Expect five office days a week: Amazon ended its three-day hybrid policy for corporate staff in January 2025.

What makes Amazon unique

  • Most of Amazon's profit comes from cloud: AWS made 21% of sales but 60% of operating profit in mid-2026.
  • Amazon is America's biggest parcel carrier by volume: it handled 6.9 billion packages in 2025, more than the Postal Service.
  • Writing matters more than slides: Amazon meetings open with silent reading of a six-page memo instead of PowerPoint.

Help us improve and share your feedback! Did you find this helpful?

Benefits

  • Flexible Work Hours
  • Company Equity

Growth & Insights and Company News

Headcount

6 month growth

2%

1 year growth

2%

2 year growth

1%
PR Newswire
Oct 20th, 2026
Beauty tops Amazon's Prime Big Deal Days 2026 with 32% of shoppers, as US online sales hit $9.86B

Beauty and cosmetics was the most-purchased category on Amazon during Prime Big Deal Days 2026, bought by 32% of shoppers, according to a report from Seattle-based Market Defense. The category was up from 22% and third place in 2025. The event ran October 6 to 7. Shoppers spent $9.86 billion online at all US retailers, up 8.5% from $9.09 billion a year earlier. Mobile accounted for 52% of that spend. Skincare brands took nine of the top 10 bestselling brand spots. La Roche-Posay ranked first in beauty with 8.9% share of sales, and K-beauty brands together took 12.8%. Beauty shoppers paid close to full price: the typical price dipped less than 1%, against almost 6% at June's Prime Day.

Yahoo Finance
Oct 19th, 2026
Amazon vs Home Depot: $716.9B revenue meets $164.7B in a 2026 stock showdown

Amazon and Home Depot offer investors a choice between growth and stability, according to a comparison of the two consumer stocks for 2026. Amazon's revenue for fiscal 2025 reached nearly $716.9 billion, up 12.4%. Net income rose to about $77.7 billion from $59.2 billion, a net margin of roughly 10.8%. Home Depot's revenue rose 3.2% to nearly $164.7 billion, but net income fell to about $14.2 billion from $14.8 billion. Its debt-to-equity ratio is about 5.1x, against 0.4x for Amazon. Amazon trades at a forward price-to-earnings ratio of 19.8x, versus 20.4x for Home Depot. Home Depot's price-to-sales ratio is lower, at 1.8x against 3.5x. The author favours Amazon for its diversified income and long-term growth potential.

TechCrunch
Oct 19th, 2026
Amazon backs 960MW Indiana nuclear plant with 12 X-energy reactors on former coal site

Amazon will fund a proposed 960-megawatt nuclear plant in Indiana and be the first customer to buy its power, the companies announced Monday. American Electric Power (AEP) would operate the plant, and X-energy, a designer of small modular nuclear reactors, would supply 12 Xe-100 reactors. The plant would sit on the site of a demolished coal plant just south of Terre Haute. It would connect to the public grid, though Amazon says the power would also serve its data centres. The deal is the second between Amazon and X-energy, and three times larger than the first. Amazon led a $700 million Series C-1 round in X-energy in October 2024. The companies plan 5 gigawatts of new US nuclear capacity by 2039. The timeline depends on X-energy delivering its first plant, at Seadrift in Texas, where it has yet to break ground.

Yahoo Finance
Oct 19th, 2026
ETFs sell $81.5M of Amazon, snapping four-day buying streak

ETFs sold a net $81.5 million of Amazon (AMZN) on Thursday, October 15, as 15 funds cut holdings and 55 added shares. The selling ended a four-day run of net buying. SPY made the largest cut at $164.9 million, trimming 647,178 shares. IVV sold $24.6 million and IYC $7.2 million. ETFs had added $149.3 million on October 14, $260.5 million on October 13, $161.2 million on October 12, and $247.4 million on October 9. Amazon has a market cap of $2.70 trillion. Its trailing 12-month revenue is $775.68 billion, up 14.7% year over year.

Business Insider
Oct 19th, 2026
Amazon's $220B AI build-out turns free cash flow negative as power and delivery delays bite

Amazon's AI data centre buildout has pushed the company into negative free cash flow, according to a recording of a September staff meeting obtained by Business Insider. Amazon is spending $220 billion this year on AI infrastructure. Prasad Kalyanaraman, who oversees much of that expansion, said he expects free cash flow to stay negative for "the next couple of years or so." Delays in power, equipment, or construction can leave billions of dollars of hardware idle. Under a new "Early Rack Receipt" process, Amazon takes ownership of server racks earlier, spending cash sooner. Amazon says AWS revenue grew 37% last quarter, and its backlog reached $496 billion. Chief executive Andy Jassy sees a "clear line of sight" to strong returns.