O

OpenAI

Builds AI models and the ChatGPT assistant

Principal Software Engineer

Full-TimePosted on 10/23/2026
$459k - $536k/yr
Expert
San Francisco, CA, USA+1 moreMore locations: New York, NY, USA
HybridThree days each week in the office; relocation assistance is available.
Software EngineeringFull-Stack Engineering

About the job

Requirements
  • Have 10 or more years of software engineering experience, with a track record of shipping high-quality products across the full stack.
  • Have led complex technical initiatives and made architecture decisions that balance product needs, development speed, and maintainability.
  • Have experience driving product and design decisions in close partnership with product managers and designers.
  • Have experience building interactive educational tools or learning products.
  • Have experience developing AI-powered applications or systems built around large language models.
Responsibilities
  • Lead end-to-end development of learning experiences in ChatGPT, from early exploration through production and iteration.
  • Drive product and design decisions with product managers and designers, bringing technical insight, user feedback, and sound judgment to priorities and tradeoffs.
  • Set technical direction for complex initiatives and guide architecture decisions that support rapid experimentation and long-term reliability.
  • Build multimodal learning capabilities that combine text, images, voice, and interactive interfaces.
  • Develop scalable services and application programming interfaces to support learning features throughout ChatGPT.
  • Work with researchers, platform teams, designers, and engineers to prototype ideas and bring new artificial intelligence capabilities to users.
  • Improve performance, reliability, and usability across ChatGPT’s learning surfaces, using experiments and user feedback to guide improvements.
  • Support other engineers through mentorship, code reviews, and clear technical guidance.
Desired Qualifications
  • Enjoy building consumer products and taking ownership from initial concept through production.
  • Bring clarity to ambiguous problems and translate them into practical product solutions.
  • Have strong product engineering instincts and care deeply about the quality of the user experience.
  • Want to build products with meaningful global impact and expand access to education and learning opportunities.

About the company

OpenAI researches and builds artificial intelligence models and turns them into products for people, developers, and businesses, with a stated mission of making sure artificial general intelligence benefits all of humanity. Its launch of ChatGPT in 2022 brought generative AI into everyday use. People use ChatGPT to ask questions, write, code, and analyze files, developers build OpenAI's models into their own apps through its API, and its Codex agent works through coding tasks on its own. OpenAI earns money from ChatGPT subscriptions, business plans, and API usage. Sam Altman, Elon Musk, and others co-founded it in 2015; it is based in San Francisco and overseen by a nonprofit, the OpenAI Foundation.

Company Size

1,001-5,000

Company Stage

Late Stage VC

Total Funding

$226.5B

Headquarters

San Francisco, California

Founded

2015

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Simplify's Take

What believers are saying

  • Sales are compounding: OpenAI's yearly revenue pace doubled from $24 billion in March 2026 to nearly $50 billion in September.
  • Equity turns into cash regularly: staff sold $7 billion of shares in August 2026, after $6.6 billion in October 2025.
  • Room to grow: OpenAI plans to nearly double staff to 8,000 by year-end and listed 816 openings in October 2026.

What critics are saying

  • Its chief rival pulled ahead: Claude maker Anthropic's $965 billion valuation in May 2026 topped OpenAI's $852 billion.
  • Profits are years away: OpenAI's own forecast, reported in September 2026, shows $278 billion of cash burn through 2030.
  • Expect leadership churn: 15 senior leaders, including the revenue and applications chiefs, left OpenAI between January and September 2026.

What makes OpenAI unique

  • A nonprofit is in charge: the OpenAI Foundation appoints OpenAI's whole board and held a 26% stake in October 2025.
  • ChatGPT reaches about one in seven people on Earth: 1.2 billion used it each week as of September 2026.
  • Microsoft is a major part-owner: it held about 27% in October 2025 and licenses OpenAI's models through 2032.

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Benefits

  • Health insurance
  • Dental and vision insurance
  • Flexible spending account for healthcare and dependent care
  • Mental healthcare service
  • Fertility treatment coverage
  • 401(k) with generous matching
  • 20-week paid parental leave
  • Life insurance (complimentary)
  • AD&D insurance (complimentary)
  • Short-term/long-term disability insurance (complimentary)
  • Optional buy-up life insurance
  • Flexible work hours and unlimited paid time off (we encourage 4+ weeks per year)

Growth & Insights and Company News

6 month growth

6%

1 year growth

1%

2 year growth

2%
Bloomberg
Oct 23rd, 2026
UK commits $127M to AI biosecurity lab backed by OpenAI, Anthropic and Google DeepMind

The UK has announced £100 million ($134 million) for an AI Biosecurity Lab, which OpenAI, Anthropic, and Google DeepMind will support. The funding is part of a package of measures to help the government understand and tackle the risks posed by the technology.

Associated Press
Oct 23rd, 2026
AIM Intelligence joins OpenAI's partner network, launching Stinger-Daybreak security assessments

AIM Intelligence, a Seoul-based AI safety and security company, has expanded its cybersecurity collaboration with OpenAI. It unveiled an application security assessment service that links its AI blue-teaming platform, Stinger, with OpenAI's Daybreak cybersecurity program. The service combines code vulnerability analysis using the Daybreak Blue model, runtime testing with Stinger, and expert review. It covers AI applications, web services, and APIs, and weighs flaws against an application's permissions, configurations, and data flows to show which to fix first. Results include reproduction evidence for validated findings and remediation guidance. The service is aimed at Korean organizations. On October 22 at OpenAI DevDay Exchange Seoul, OpenAI introduced AIM Intelligence as a Select Partner in the OpenAI Partner Network.

The Information
Oct 22nd, 2026
OpenAI Fundraising Round Set to Close Soon With UAE Investors, Coatue Leading Investment

OpenAI is aiming to close a $30 billion fundraising round that will value the AI company at up to $1.25 trillion, not including the new investment, before the end of next week, according to a person familiar with the deal. New York-based investment firm Coatue Management and investors from the United Arab Emirates are set to lead the financing round, the person said. CNBC first reported the

TechCrunch
Oct 22nd, 2026
OpenAI launches Decisions API to rival TypeSafe, the $7.6B startup behind Jev

OpenAI has made its Decisions API model widely available, entering a market that recently made TypeSafe, a startup founded by a former OpenAI researcher, a $7.6 billion company. The API became available to all customers on Thursday. Decision models act as super classifiers: given a set of options, they choose quickly and rate their confidence. Developers use them in place of large language models to work faster and at much lower cost. OpenAI built its version by reconfiguring ChatGPT Luna. Product lead Nikunj Handa said response times fell from one to three seconds to 100 to 180 milliseconds. Speak, which builds AI language tutors, cut the time between actions from 1.4 seconds to 0.13 seconds. Other early customers included Box, Datadog, and Ramp. On public benchmarks, OpenAI's model ranks eighth and fourteenth, behind TypeSafe's Jev model.

The Information
Oct 22nd, 2026
Defenders' window narrows as Chinese AI models close in, while Meta posts $64.6B revenue

Meta said third-quarter revenue rose 26% to $64.6 billion, slightly above its forecast, and announced a new class of nonvoting common stock to raise capital for its AI spending without diluting chief executive officer Mark Zuckerberg's control. Shares rose 2% in after-hours trading. Existing shareholders will get one Class C share for each Class A or B share they hold. The stock can be issued from January 19. Meta gave no timing or size for an equity offering. Free cash flow was negative $2.12 billion, against positive $10.63 billion a year earlier, due to AI investment. Full-year capital spending is expected at $135 billion to $145 billion, within its earlier range. Operating income fell 37% to just under $13 billion, partly due to a nearly $10 billion legal charge. A New Mexico judge also ordered Meta to pay $25 billion in a Cambridge Analytica case.