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Hire the Top 3% of Anthropic API Developers

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

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Clients rate Toptal Anthropic API developers 4.9 / 5.0 on average based on 1,235 reviews.
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Rafay Abbas

Anthropic API Developer
UTC-08:00
Pakistan
Toptal Member Since May 20, 2026

Rafay is a senior AI engineer and full-stack developer with 7+ years of experience building AI-powered systems, RAG pipelines, and scalable SaaS platforms. He specializes in semantic search, vector databases, and LLM integration with OpenAI and Anthropic APIs, and is equally fluent across Next.js, NestJS, and AWS. His past work includes the Easypaisa app, used by over 10 million customers, and an agentic PR Copilot for journalism professionals.

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Kanji Hara Neto

Anthropic API Developer
UTC-05:00
United States
Toptal Member Since May 26, 2026

Kanji is a problem-solving engineer with 20+ years of experience designing and modernizing scalable cloud, data, AI, and enterprise software solutions. His expertise includes Java, Python, GCP, Azure, Snowflake, Kubernetes, microservices, distributed systems, and GenAI/LLM/RAG. He brings a strong track record of solving complex business and technical challenges while leading teams to deliver secure, high-performance systems at scale.

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Rachel Cantor

Anthropic API Developer
UTC-05:00
United States
Toptal Member Since July 1, 2026

Rachel is a front-end engineer with 14 years of experience shipping web interfaces from concept to production, from venture-backed startups to Hillary For America. She specializes in React, TypeScript, and Next.js, with expertise in design systems, accessible UI (Section 508-certified), and data-heavy product interfaces. As Hype's second hire, Rachel set the front-end course that carried the platform through its growth and acquisition. She also worked with AI-assisted tooling daily for 2+ years.

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Jesús Martínez

Anthropic API Developer
UTC-05:00
Colombia
Toptal Member Since November 11, 2019

Jesús is an AI and back-end engineer with 14 years building software and 10 years shipping production ML systems. He specializes in LLM applications, AI agents, workflow automation, and scalable back-end services. From prototyping NLP models to deploying multi-agent platforms, he delivers end-to-end solutions using Python, modern AI frameworks (OpenAI, Anthropic, open-source LLMs), RAG architectures, and cloud infrastructure, helping clients move fast without sacrificing quality.

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Steve Zhang

Anthropic API Developer
UTC-05:00
Canada
Toptal Member Since November 25, 2025

Steve Zhang is a senior full-stack developer with over 20 years of professional experience spanning Canadian banking, telecommunications, and startups. He specializes in React and Next.js and has championed Playwright test adoption with a strong commitment to automation. Drawing on deep expertise in Java and Spring Boot, Steve has also architected CI/CD pipelines that streamlined enterprise delivery and consistently produced scalable solutions with measurable impact.

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Rajendra Upadhyay

Anthropic API Developer
UTC+00:00
India
Toptal Member Since February 23, 2022

Rajendra is a full-stack and AI engineer with a decade of experience in React, React Native, and Node.js, now building and leading production-agentic AI systems across the OpenAI and Anthropic stacks. He architects RAG and multi-step agent workflows, owns LLM evaluation and cost, and mentors engineers, shipping polished React interfaces and reliable, observable agents with equal fluency in TypeScript and Python.

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Hiromi Shikata

Anthropic API Developer
UTC+00:00
Japan
Toptal Member Since February 12, 2025

Hiromi is a full-stack engineer and manager with 19 years of experience building scalable systems. An expert in TypeScript, Go, Python, Rust, and Clean Architecture, she brings skills in DevOps (GitHub Actions and auto testing), AI (OpenAI, Claude, and AutoGPT), and infrastructure (AWS, GCP, Docker, and Terraform). She created dynamic UIs by leveraging React, Shadcn, and Tailwind CSS. Hiromi leads teams using Agile and Lean methodologies and leverages modern tech stacks for impactful results.

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Dmitry Vasilyev

Anthropic API Developer
UTC+02:00
United Arab Emirates
Toptal Member Since January 12, 2022

Dmitry is a forward deployed engineer, seasoned CTO, and principal engineer with 20+ years of experience in AI, telecom, fintech, medtech, game development, and Web3. He leads production-ready AI agent ecosystems, orchestrates complex model workflows, and customizes LLMs for real-world automation. Dmitry has built high-load systems used by millions, led deep tech initiatives, and delivered products for Fortune 500 companies, combining engineering depth with strong execution and product vision.

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Sirusho Martikyan

Anthropic API Developer
UTC+04:00
Armenia
Toptal Member Since June 2, 2026

Sirusho is a senior full-stack developer with 8+ years of commercial experience building scalable, high-performance web applications using React, Next.js, and TypeScript. She specialized in microfrontend architectures, design systems, and enterprise platforms. She has led front-end delivery for global brands including IQOS and Burberry, redesigning a product lifecycle management platform and shipping login, registration, and account flows used by millions across microfrontend architectures.

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Seva Rybakov

Anthropic API Developer
UTC+08:00
Georgia
Toptal Member Since September 6, 2015

Seva is a senior AI agent architect with over 15 years of experience specializing in multi-agent conversational AI. As a three-time co-founder and CTO, he architected the full AI agent platform at Elis—featuring dynamic voice and text agents with Claude, Anthropic, OpenAI, and LangGraph—acquired in 2026. Seva is a heavy daily user of Claude, achieving 3-4x faster development speeds. He has proven expertise in leading offshore AI teams and delivering production-grade agent systems.

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Sam Watkins

Anthropic API Developer
UTC+10:00
Australia
Toptal Member Since February 25, 2021

Sam is an expert programmer with 25 years of experience. He's a good communicator, enthusiastic, innovative, and meticulous in his attention to detail. Sam practices "Simplicity, Clarity, Generality" to rapidly create quality software. His research interests include LLMs, latent diffusion, e-learning, collaboration, maths, and graph-based programming. Sam programs in Python, JavaScript, Go, C, and Perl, and creates web apps with Python, Node.js, PostgreSQL, HTML5, CSS, and Svelte.

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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 Anthropic API 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 Anthropic API developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new Anthropic API 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 Anthropic API 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.

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FAQs

  • Typically, you can hire Anthropic API 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 Anthropic API 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 Anthropic API 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 Anthropic API developers for your project.

  • At Toptal, we thoroughly screen our Anthropic API 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 Anthropic API developers with Toptal, you’ll always work with world-class, custom-matched Anthropic API developers ready to help you achieve your goals.

  • You can hire Anthropic API 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 Anthropic API 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 Anthropic API developers can fully integrate into your existing team for a seamless working experience.

  • We make sure that each engagement between you and your Anthropic API 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 Anthropic API 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 Anthropic API Developers Are in High Demand.

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