Hire Codex Developers

Hire the Top 3% of Codex Developers

Hire vetted Codex developers on demand. Leading companies choose Codex freelancers from Toptal for their most important development projects.

Hire a Top Codex Developer Now

No-Risk Trial, Pay Only If Satisfied.

Clients rate Toptal Codex developers 4.9 / 5.0 on average based on 937 reviews.
Talent Navigator
World map with time zones
Find and hire Top Codex Developers worldwide. Simply click on your preferred time zone on the map.

Trusted by leading brands and startups

Hire Codex Developers

Shanto Mathew

Codex Developer
UTC-06:00
United States
Toptal Member Since June 1, 2026

Shanto is an AI engineer specializing in agentic and voice AI. He builds production agents using Claude Code, Codex, and custom multi-agent frameworks, as well as low-latency voice agents for retail, support, and sales. Shanto takes frontier models from prototype to reliable, cost-aware production systems—tool use, RAG, orchestration, evaluations, and the integrations that make them real.

Show More

Nabeel Nazir

Codex Developer
UTC-06:00
Canada
Toptal Member Since May 26, 2026

Nabeel is a senior software engineer with 10+ years of experience building scalable SaaS platforms, workflow automation, cloud integrations, and AI-driven systems. At TELUS Health, he helped automate 650,000+ clinical tasks and save clinicians 225+ hours monthly. He specializes in Ruby on Rails (RoR), Node.js, React, Vue.js, Claude, ChatGPT, Gemini, and Codex.

Show More

Jimmy Zebfred

Codex Developer
UTC-05:00
United States
Toptal Member Since July 30, 2025

Jimmy spent 9+ years building ML/AI solutions for the fintech, healthcare, eCommerce, and software development industries. He has achieved state-of-the-art accuracy while reducing GPU power consumption and operational costs. Jimmy is well-versed in various fields, including data analytics, business intelligence, Agile development, and data engineering.

Show More

Andy Smith

Codex Developer
UTC-05:00
United States
Toptal Member Since May 5, 2026

Andy is a senior engineer and founder with 20+ years of expertise across desktop, web, back-end, and AI platforms. He excels in soloing production systems end-to-end and advising CIOs, CTOs, and boards on engineering strategy. Now focused on multi-agent AI and LLM platform architecture, Andy is an expert in legacy rescue, performance, and modernization. He is also a public voice in agentic AI, with a developer-focused YouTube channel on Microsoft Autogen, featured by the official Autogen team.

Show More

Evan Ross

Codex Developer
UTC-05:00
United States
Toptal Member Since June 12, 2026

Evan is a lead/staff software engineer with over 15 years of experience in distributed systems and AI-integrated solutions. Their expertise spans event-driven architecture and high-reliability software, with notable work at DemandQ, Aerva by Watchfire, and Boston Technologies. Evan architected an AI-based document processing pipeline for clinical trial files at Ambadassador.

Show More

Mubarak Awal

Codex Developer
UTC+01:00
Germany
Toptal Member Since October 17, 2022

Mubarak is a senior full-stack developer with over nine years of experience. He is a big fan of using AI to improve the quality and speed of product delivery. He has extensive knowledge in the gaming, education, and tech recruitment industries. Mubarak is a keen problem solver with experience building and managing mission-critical enterprise-level applications and startup projects.

Show More

Oana Goge

Codex Developer
UTC+01:00
Denmark
Toptal Member Since June 17, 2015

Oana is a senior back-end engineer and systems architect with 7+ years of experience in ASP.NET Core, Node.js, and Azure. She has built and maintained enterprise healthcare platforms for 190+ clients with 99.9%+ uptime, integrating 35+ external services, including AI/ML, payment, and communication systems. Retained by a client for seven years, Oana led full-stack teams and specializes in HIPAA-compliant architectures, AI integration, and cloud-native solutions.

Show More

Philippe Soubrane

Codex Developer
UTC+01:00
France
Toptal Member Since February 24, 2020

As the head of BNP Paribas CIB's electronic trading department for many years, Philippe has led the in-house development of all the trading and eCommerce systems and tools. While at BNP Paribas CIB, he also created and managed Fast IT, a team that accelerated IT development transformation. What drives Philippe is the thrill of developing software and the complex architecture of innovative products.

Show More

Steven Don

Codex Developer
UTC+01:00
Netherlands
Toptal Member Since September 25, 2026

Steven is a full-stack engineer with 25 years of experience building and scaling web platforms that power multi-million-euro businesses. Specializing in PHP, WordPress, Laravel, Node.js, Python, and modern JavaScript/TS frameworks (React, Next.js, Vue, Angular), he delivers robust systems integrated with Salesforce, Stripe, Exact Online, and AI tools (ChatGPT, Claude). Clients value his ability to look beyond technical requirements and solve business challenges with reliable, scalable solutions.

Show More

Oleg Filimonov

Codex Developer
UTC+08:00
United Arab Emirates
Toptal Member Since November 6, 2017

Oleg builds AI-powered web and mobile products with TypeScript, Next.js, React Native, and Expo. A full-stack developer with 11 years of experience, he created SLYK and has evolved it over five years, including three years of AI-assisted development. He uses Claude Code and Codex for product engineering, backed by typed APIs, automated checks, and release tooling for web, iOS, and Android.

Show More

Nauman Mustafa

Codex Developer
UTC+09:00
Japan
Toptal Member Since October 10, 2019

Nauman works with agentic AI both during development and shipping agentic experience in production. Previously, he has developed and deployed state-of-the-art deep learning models in production. He's worked with models in image classification, object detection, image generation, OCR, and text generation. Nauman has mostly worked in startup-sized teams, and he prefers working on products involving agentic AI or deep learning systems.

Show More

Discover More Codex Developers in the Toptal Network

Start Hiring
Toptal in the press

... allows corporations to quickly assemble teams that have the right skills for specific projects.

Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.

Our clients
Creating an app for the game
Conor Kenney
Creating an app for the game
Leading a digital transformation
Elmar Platzer
Leading a digital transformation
Building a cross-platform app to be used worldwide
Building a cross-platform app to be used worldwide
Drilling into real-time data creates an industry game changer
Drilling into real-time data creates an industry game changer
Testimonials

How to Hire Codex Developers Through Toptal

1

Talk to One of Our Client Advisors

A Toptal client advisor will work with you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-selected Talent

Within days, we’ll introduce you to the right Codex developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new Codex developer for a trial period (pay only if satisfied), ensuring they’re the right fit before starting the engagement.

EXCEPTIONAL TALENT

How We Source the Top 3% of Codex Developers

Our name “Toptal” comes from Top Talent—meaning we constantly strive to find and work with the best from around the world. Our rigorous screening process identifies experts in their domains who have passion and drive.

Of the thousands of applications Toptal sees each month, typically fewer than 3% are accepted.

Start Hiring Today

FAQs

  • Typically, you can hire Codex developers with Toptal in about 48 hours. For larger teams of talent or full end-to-end project delivery, timelines may vary. Our talent matchers are highly skilled in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network.

    Once you select your Codex developer, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time.

  • To hire the right Codex developer, it’s important to evaluate a candidate’s experience, technical skills, and communication skills. You’ll also want to consider the fit with your particular industry, company, and project. Toptal’s rigorous screening process ensures that every member of our network has excellent experience and skills, and our team will match you with the perfect Codex developers for your project.

  • At Toptal, we thoroughly screen our Codex developers to ensure we only match you with the highest caliber of talent. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut.

    In addition to screening for industry-leading expertise, we also assess candidates’ language and interpersonal skills to ensure that you have a smooth working relationship.

    When you hire Codex developers with Toptal, you’ll always work with world-class, custom-matched Codex developers ready to help you achieve your goals.

  • You can hire Codex developers on an hourly, part-time, or full-time basis. Toptal can also manage the project end-to-end based on your specific requirements as part of our Consulting and Services offerings. Whether you hire a Codex developer for a full- or part-time position, you’ll have the control and flexibility to scale your team up or down as your needs evolve. Our Codex developers can fully integrate into your existing team for a seamless working experience.

  • We make sure that each engagement between you and your Codex developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another Codex developer who may be a better fit and with whom we will begin a second, no-risk trial.

Toptal Lets You Hire Fast,
With Unparalleled Success

  • Trusted Talent Only

    Trusted Talent Only

    Our talent network is composed of thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results.

  • Precise Matching

    Precise Matching

    Our experienced talent matchers specialize in identifying talent that fits your needs. They work to understand your exact requirements and hand-select the best professionals for your project.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDAs, streamlining the hiring process so you can focus on innovation, not overhead.

  • No-risk Trial Period

    No-risk Trial Period

    We want to be sure your engagement is a total success, so we offer a no-risk trial period. Work with your new hire for up to two weeks and pay only if you’re satisfied.

  • Effortless Scaling

    Effortless Scaling

    We help you scale your team up or down as needed, with quick and efficient hiring in under 48 hours.

  • Flexible Engagements

    Flexible Engagements

    Our flexible engagement models allow you to choose the engagement type that suits your needs and adjust it anytime: hourly, part time, or full time.

Top Codex Developers Are in High Demand.

Start Hiring