How do I hire JAX developers?

To hire the right JAX-WS developers, 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 JAX developers for your project.

How are Toptal JAX-WS developers different?

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

Can you hire JAX engineers on an hourly basis or for project-based tasks?

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

What is the no-risk trial period for Toptal JAX developers?

We make sure that each engagement between you and your JAX 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 JAX developer who may be a better fit and with whom we will begin a second, no-risk trial.

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Salman Ahmed

Freelance JAX Developer

Verified Expert in Engineering

UTC-08:00

United States

Toptal Member Since August 11, 2022

Salman is a principal AI engineer with 13+ years of experience designing and implementing AI solutions in top Fortune 500 companies (Google, CVS Health, and Moss). He's skilled in designing and developing end-to-end solutions that align with business objectives. Salman is an effective leader who has led teams of 15+ and delivered estimated cost savings of $18 million per quarter.

JAX PyTorch TensorFlow Machine Learning Computer Vision NLP Deep Learning Python AWS Sagemaker Artificial Intelligence Cloud Engineering Neural Network Code Review

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Horia Mărgărit

Freelance JAX Developer

Verified Expert in Engineering

UTC-08:00

United States

Toptal Member Since November 16, 2021

Horia's industry experience extends across digital health, consumer finance, internet search, engineering software, and transportation logistics. He has over 10 years of expertise applying AI methods and approaches to tackle businesses problems. Horia's predictions for business applications of AI have been featured in CIO magazine and Forbes. He earned a master of science degree in statistics at Stanford University and two BAs specializing in cognitive and computer science at UC Berkeley.

JAX Deep Learning NLP Artificial Intelligence Machine Learning Recommendation Systems Apache Keras Python R Data Science Data Visualization Algorithms

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Raven Nicole Roberts

Freelance JAX Developer

Verified Expert in Engineering

UTC-05:00

United States

Toptal Member Since May 29, 2026

Raven is an ML engineer with three years of production experience building systems where the math actually has to work. She specializes in geometric deep learning, quantum ML, and physics-informed architectures, i.e., problems where off-the-shelf solutions don't fit and you need to build the right primitives from scratch. Comfortable across PyTorch, JAX, PennyLane, and embedded TinyML deployment, Raven also shipped ML systems for robotics and AI infra companies in Singapore and Vienna.

JAX Python PyTorch MLOps Redis Docker TensorFlow GitHub Scikit-Learn C++Git C#Matplotlib

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Matthew Alhonte

Freelance JAX Developer

Verified Expert in Engineering

UTC-05:00

United States

Toptal Member Since August 21, 2018

Matt has worked as a machine learning engineer, data engineer, and data scientist for over 10 years, and has worked at the intersection of stats and programming for closer to 20 (before the term data scientist had caught on). He combines strong technical skills in deploying production data pipelines, ML model training, and inference pipelines with a rigorous background in experiment design and statistical inference.

JAX ETL Data Science Python SQL Machine Learning Data Visualization Data Analysis OpenAI Database Artificial Intelligence LLM AI architect

View Laurence

Laurence Cullen

Freelance JAX Developer

Verified Expert in Engineering

UTC+00:00

United Kingdom

Toptal Member Since April 10, 2019

Laurence is a machine learning engineer and founder of venture-backed startup Vanellus, developing accelerated physics simulations. Laurence combines extensive experience executing and deploying R&D heavy machine learning projects with six years of industrial software engineering. His machine learning experience ranges from LLMs and computer vision to audio synthesis and cutting-edge approaches to accelerate numerical programming problems.

JAX Python OpenCV Unix Artificial Intelligence Machine Learning REST API LLM

View Alan

Alan Sammarone

Freelance JAX Developer

Verified Expert in Engineering

UTC+01:00

Netherlands

Toptal Member Since March 28, 2017

Alan is an innovative software, research, and machine learning (ML) engineer with over a decade of experience idealizing, researching, building, and deploying machine learning applications. He excels in fast-paced startup environments and drives cutting-edge AI/ML solutions from concept to deployment.

JAX Machine Learning NumPy Python PostgreSQL Flask SQL LLM Web Development Artificial Intelligence MLOps CI/CD DevOps

View Alex

Alex Burlacu

Freelance JAX Developer

Verified Expert in Engineering

UTC+01:00

Moldova

Toptal Member Since May 24, 2022

Over the years, as an experienced machine learning engineer, Alex dealt with diverse problems, ranging from computer vision to natural language processing and time series forecasting. He has worked as a single engineer on the project several times, and despite scarce data and few computational resources, he succeeded where others failed. He has acted as a machine learning team lead for the past few years. In his spare time, Alex enjoys engaging in independent lecturing and ML research.

JAX Python Git Deep Learning Machine Learning Scikit-Learn MLOps Docker NLP Artificial Intelligence Neural Network REST API LLM

View Ariel

Ariel Kwiatkowski

Freelance JAX Developer

Verified Expert in Engineering

UTC+01:00

Switzerland

Toptal Member Since August 14, 2019

Ariel is an experienced developer with a strong focus on machine learning algorithms for reinforcement learning, graph analytics, image classification, and feature engineering. His physics background makes math-heavy topics a core strength, along with hands-on experience with machine learning and software engineering. Ariel has obtained his PhD in the application of AI to crowd simulation.

JAX NLP Python TensorFlow Machine Learning Artificial Intelligence Convolutional Neural Network Computer Vision OpenAI LLM AI Agent ChatGPT

View Simon

Simon Geisler

Freelance JAX Developer

Verified Expert in Engineering

UTC+01:00

Germany

Toptal Member Since March 19, 2020

Simon is an AI and data science professional with more than five years of experience in data science, data engineering, software engineering, and system architecture design in the public cloud (products scaled to 10+ million users). In Germany and Silicon Valley, he worked on spatio-temporal IoT, natural language processing, and computer vision projects. Besides his strong affinity to modeling algorithms, Simon confidently develops production-grade microservices, Spark, and Kafka Streams apps.

JAX Apache Kafka Machine Learning Deep Learning Database Spark Data Mining Data Analysis Data Science Artificial Intelligence PostgreSQL Jupyter Python

View Jan

Jan Krepl

Freelance JAX Developer

Verified Expert in Engineering

UTC+01:00

Switzerland

Toptal Member Since July 14, 2023

Jan is a lead machine learning (ML) engineer with expertise in cloud architecture, full-stack development, and freelance software engineering across diverse projects. He designs and deploys machine learning solutions with a strong focus on natural language processing, computer vision, and time series analysis, and seamlessly embeds them into full-stack applications. Outside work, Jan contributes to open-source projects and shares technical knowledge through educational content.

JAX Kubernetes PyTorch Scikit-Learn NumPy Keras Docker Machine Learning MLOps AWS Python Git Matplotlib

View Naoki

Naoki Shibuya

Freelance JAX Developer

Verified Expert in Engineering

UTC+09:00

Japan

Toptal Member Since March 12, 2021

Naoki is a senior machine learning engineer with experience in PyTorch. He is passionate about deep learning training, and he worked on model quantization and neural architecture search for vision models. Naoki is also an experienced C++ programmer who has worked on real-time algorithmic trading systems.

JAX C++PyTorch Deep Learning NumPy Python Convolutional Neural Network Machine Learning Computer Vision Artificial Intelligence Code Review

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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

Leading a digital transformation

Building a cross-platform app to be used worldwide

Drilling into real-time data creates an industry game changer

Testimonials

Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of Tripcents as any in-house team member of Tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a startup, they are our secret weapon.
Brantley Pace
CEO & Co-Founder

How to Hire JAX-WS Developers Through Toptal

Talk to One of Our Client Advisors

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

Work With Hand-selected Talent

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

The Right Fit, Guaranteed

Work with your new JAX 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 JAX 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

STEP 1

Language and Personality Evaluation

26.4% of applications pass

The first step of the screening process is a comprehensive English language and communication evaluation. We also assess personality traits, seeking only those who are passionate and fully engaged in their work.

STEP 2

In-depth Skill Review

7.4% of applications pass

We test each applicant’s technical knowledge and problem-solving ability through various assessments. Every member of the Toptal network is an expert in their domain, and we typically only advance candidates with exceptional results in this phase.

STEP 3

Live Screening

3.6% of applications pass

Toptal screeners, who are experts in their functional domain, interview each JAX developer. Our screeners provide specific live exercises, looking for problem-solving ability, depth of experience, communication ability, and creativity.

STEP 4

Test Project

3.2% of applications pass

Each candidate is assigned a test project to evaluate whether they can “walk the walk.” Test projects take 1-3 weeks and are comprehensive and provide real-world scenarios for candidates to demonstrate their competence, thoroughness, professionalism, and integrity.

STEP 5

Continued Excellence

Top 3.0% of JAX developers

As a quality-first company, we demand the best from our talent, so they can deliver the best to our clients. This principle permeates every Toptal engagement and delivered project. Only the top 3% of Developers can consistently perform at this level.

FAQs

Typically, you can hire JAX 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 JAX 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 JAX-WS developers, 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 JAX developers for your project.
At Toptal, we thoroughly screen our JAX engineers 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 JAX engineers with Toptal, you’ll always work with world-class, custom-matched JAX developers ready to help you achieve your goals.
You can hire JAX 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 JAX 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 JAX developers can fully integrate into your existing team for a seamless working experience.
We make sure that each engagement between you and your JAX 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 JAX 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
Our talent network is composed of thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results.
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
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
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
We help you scale your team up or down as needed, with quick and efficient hiring in under 48 hours.
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.