Full-Time

Applied AI Engineer

Codex

Posted on 9/11/2026

OpenAI

OpenAI

10,001+ employees

Develops safe AI models and tools

No salary listed

London, UK

Hybrid

Three days on-site per week required; relocation assistance is offered.

Category
Software Engineering (1)
Required Skills
Python
JavaScript
Machine Learning
TypeScript
Observability
Data Governance

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Requirements
  • Demonstrated experience designing, building, and delivering software or artificial intelligence systems in enterprise environments, including taking systems from prototype to production.
  • Substantial personal contributions in code, architecture, evaluation, debugging, integrations, or production engineering.
  • High proficiency in Python and comfort working across modern software development environments.
  • Active use of artificial intelligence coding tools and a strong point of view on improving developer productivity and software engineering workflows.
  • Understanding of systematic evaluation for artificial intelligence coding systems, including representative tasks, automated evaluations, production signals, and developer feedback mechanisms.
  • Experience navigating enterprise production requirements such as developer tooling integrations, reliability, observability, security, privacy, data governance, performance, and cost.
  • Ability to connect technical decisions to developer workflows, adoption, engineering productivity, and measurable business outcomes.
  • Ability to communicate clearly and credibly across hands-on engineers, engineering leaders, security teams, product leaders, and executives.
  • Ability to lead technical workshops and hands-on sessions that help engineering organizations adopt new development workflows and technologies.
  • Ability to speak English fluently.
Responsibilities
  • Partner directly with engineering leaders and hands-on developers to identify high-value opportunities for Codex and translate them into technical architectures, implementation plans, evaluation strategies, and measurable success criteria.
  • Design, build, and deploy artificial intelligence-powered software development workflows that improve how engineering teams plan, write, test, review, debug, and deliver software.
  • Build prototypes, evaluation harnesses, reference implementations, integrations, workflow automations, and production accelerators in code.
  • Help customers progress from experiments to reliable production workflows, sustained developer adoption, and scaled impact across engineering organizations.
  • Design systematic approaches for evaluating artificial intelligence coding systems using representative software engineering tasks, automated graders, production signals, and developer feedback.
  • Make technical decisions across models, agents, tools, developer environments, integrations, reliability, observability, latency, cost, safety, security, and operational readiness.
  • Diagnose complex implementation challenges, reproduce failures, test hypotheses, and drive technical blockers toward resolution.
  • Lead technical deep dives, workshops, and hands-on enablement for advanced artificial intelligence coding workflows.
  • Gather insights from Codex deployments and translate them into product proposals, model feedback, and technical requirements for Product, Research, and Engineering teams.
  • Create reusable architectures, tooling, examples, guides, and technical patterns, including contributions to resources such as the OpenAI Cookbook.
  • Influence customer engineering strategy by helping technical leaders understand how artificial intelligence coding systems can reshape software development lifecycles, engineering practices, and organizational workflows.
Desired Qualifications
  • Experience with JavaScript, TypeScript, or another relevant programming language.
  • Experience in applied artificial intelligence or machine learning engineering, forward-deployed engineering, software engineering, developer tooling, customer engineering, solutions architecture, or technical consulting.
  • Experience using Codex or other artificial intelligence coding tools.

OpenAI conducts AI research and deployment to build advanced AI models and tools that help people automate tasks, be more creative, and make better decisions. Its products include ChatGPT, a conversational AI that can write, code, tutor, and assist in interactive tasks, and Sora, which can generate videos from text prompts. OpenAI’s models typically run through cloud-based services and subscriptions, with licensing and partnerships for broader use. The company operates a capped-profit model to balance generating revenue with ensuring safety, ethics, and long-term societal benefits. Its approach emphasizes safety, responsible deployment, and collaboration with researchers, governments, and institutions. The goal is to ensure artificial general intelligence, when it arrives, benefits all of humanity and minimizes risks.

Company Size

10,001+

Company Stage

Private

Total Funding

$196.5B

Headquarters

San Francisco, California

Founded

2015

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Simplify Jobs

Simplify's Take

What believers are saying

  • OpenAI says revenue hit $2 billion monthly, with enterprise above 40%.
  • August 2026 ChatGPT for Teens and Images 2.5 expand monetizable product lines.
  • Nvidia’s August 2026 $105 billion Ohio backing secures OpenAI’s compute buildout.

What critics are saying

  • September 5, 2026 lawsuits from Seattle Times and Newsday target training datasets and models.
  • Apple and New York Times litigation threatens discovery, injunctions, and forced retraining.
  • A court loss on copyright or trade secrets would freeze releases and damage the 2027 IPO.

What makes OpenAI unique

  • March 31, 2026 funding gave OpenAI $122 billion and an $852 billion valuation.
  • OpenAI’s Jalapeño chip program with Broadcom cuts inference costs versus Nvidia GPUs.
  • ChatGPT’s consumer brand funnels directly into enterprise adoption and workflow expansion.

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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)

Annual learning & development stipend

Regular team happy hours and outings

Daily catered lunch and dinner

Travel to domestic conferences

Growth & Insights and Company News

Headcount

6 month growth

5%

1 year growth

0%

2 year growth

4%
Bloomberg
Sep 9th, 2026
OpenAI appoints US AI adviser Paul Christiano to nonprofit board amid growing safety concerns

OpenAI has appointed Paul Christiano to its nonprofit board. Christiano, a technical adviser to the US government and prominent safety researcher, joins at a time of heightened concerns about AI risks. The appointment adds expertise in AI safety to OpenAI's governance structure. Christiano previously worked as a researcher focused on making AI systems more aligned with human values and intentions. His addition to the board comes as policymakers and technology companies face mounting pressure to address potential dangers associated with rapidly advancing artificial intelligence capabilities.

Yahoo Finance
Sep 9th, 2026
OpenAI's Luna undercuts Chinese AI on price as enterprise revenue jumps 32%

OpenAI's lower-cost Luna model is now cheaper to deploy than Chinese open-source alternatives run through cloud providers, Chief Financial Officer Sarah Friar said at Goldman Sachs' conference in San Francisco. An 80% price cut drove a roughly 10-fold increase in Luna usage. The company is targeting chip design, life sciences, and financial services with specialised AI workflows. Enterprise revenue climbed 32% between June and July, outpacing the 20% annualised growth across the business. OpenAI used its own models to develop the Jalapeño chip in under nine months. Developed jointly with Broadcom, the inference processor shows cost savings of roughly 50% compared with typical AI graphics processing units, with initial deployment targeted for late 2026.

Yahoo Finance
Sep 9th, 2026
OpenAI deepens Samsung ties on next-generation chips and enterprise AI services

OpenAI is deepening cooperation with Samsung Electronics on next-generation chip development, the company's Korea general manager said at a Seoul press conference on Wednesday. Harrison Kim said Samsung is among OpenAI's most advanced partnerships in chip production and research, though he provided no further details. Samsung Electronics could not confirm the information. OpenAI unveiled its first custom AI chip, Jalapeno, in June with Broadcom, with Taiwan's TSMC manufacturing the chips. Samsung and SK Hynix signed letters of intent last year to supply memory chips for OpenAI's Stargate data centre project. Kim said demand for memory chips would grow as more advanced computing requires faster, more complex chips. ChatGPT Enterprise users at South Korean companies surged 28-fold by end-August year-on-year, OpenAI said.

Tech in Asia
Sep 9th, 2026
OpenAI launches ChatGPT Images 2.5, slashing latency up to 50%

OpenAI has launched ChatGPT Images 2.5, which improves multi-turn editing consistency and reduces image generation latency by up to 50% compared with Images 2.0. The company also introduced two new application programming interface models, GPT-Image-2.5 Flare and GPT-Image-2.5 Sunburst. OpenAI said people create more than 3 billion images each week across ChatGPT Images and GPT-Image API models. The system retains safeguards including prompt and image checks, C2PA metadata, and invisible watermarking. C2PA, or Coalition for Content Provenance and Authenticity, is part of a broader provenance standard that uses metadata to show a file's source and integrity. Using both metadata and invisible watermarks can help platforms identify synthetic media.

Yahoo Finance
Sep 8th, 2026
OpenAI's ChatGPT-6 Astra launch sparks memory-chip stock rally as AI spending continues

OpenAI's launch of its ChatGPT-6 Astra model last week revitalised investor interest in memory-chip stocks. Samsung Electronics, SK Hynix, and Kioxia posted strong gains on Monday as enthusiasm from US semiconductor stocks spilled into Asian markets. Astra is designed to handle more complex tasks, boosting optimism about demand for high-bandwidth memory and graphics processing units. Analysts believe the launch supports continued AI spending, with frontier AI models remaining extremely compute-intensive. Goldman Sachs and Morgan Stanley estimate that of the expected $1.3-1.5 trillion in AI capital expenditure planned for 2027, more than half will be devoted to memory. The iShares Semiconductor Index jumped 3.5% on Friday, bringing its year-to-date return to 72%.