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Hire the Top 3% of Data Processing Specialists

Hire vetted data processing specialists on demand. Leading companies choose Data Preprocessing freelancers from Toptal for their most important development projects.

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Leonid Ganeline

Data Processing Specialist
UTC-08:00
Canada
Toptal Member Since September 18, 2024

Leonid is a machine learning and data science engineer proficient in data exploration, experimentation, model training, and fine-tuning using Python, SQL, and Cloud ML. With experience in natural language processing (NLP), anomaly detection, and expertise in building ML teams, Leonid is ready for his next challenge.

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Carina van der Zee

Data Processing Specialist
UTC+00:00
United Kingdom
Toptal Member Since July 29, 2022

A seasoned AI/ML and statistics expert, Carina leverages her comprehensive skill set to deliver impactful solutions as a consultant, freelance, and CTO. Her impressive trajectory spans from top Wall Street banks to technical leadership in the tech sector, backed by robust academic credentials in mathematics, engineering, and business. Passionate about solving analytics, automation, and optimization challenges, Carina propels businesses into the future with her data-driven approach.

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Sergei Markochev

Data Processing Specialist
UTC+00:00
United Kingdom
Toptal Member Since May 24, 2021

Sergei is a lead data science and AI/ML developer with extensive experience—over 15 years' worth. He has led end-to-end project delivery and provided technical expertise for complex decision problems for FTSE 100 companies and SME businesses. Sergei possesses a PhD in Physics, has one patent and six academic papers, and recently won 1st place in an international data science competition.

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Stéphane Thibaud

Data Processing Specialist
UTC+00:00
Portugal
Toptal Member Since February 10, 2026

Stéphane is a data scientist and software engineer with 12+ years of professional experience. Over the past five years, he has focused on applied machine learning and statistical estimation, building rigorous models that turn complex, real-world data into reliable decision support. His experience spans forecasting, estimation, classification, and unstructured data, with a strong emphasis on experimental design and robust evaluation.

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Sergey Antopolskiy

Data Processing Specialist
UTC+01:00
Italy
Toptal Member Since February 2, 2021

Sergey is an expert data scientist and machine learning engineer. He has solved data analytics, visualization, and modeling problems and developed architecture and pipelines for data-centered workflows. He automated manual production steps in drug manufacturing using ML models, which led to a throughput increase of 200%. Sergey has a scientific background with extensive industry experience and understands complex problems in-depth to create the most suitable approach to generate business value.

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Pavel Logacev

Data Processing Specialist
UTC+01:00
Germany
Toptal Member Since January 27, 2022

Pavel is a data scientist specializing in Bayesian methods. He has a master's degree in computational linguistics and a PhD from Potsdam University in Germany. Pavel has over 10 years of experience in statistical data analysis and data science, having worked in sectors as diverse as pricing, psychology, finance, education, health, eCommerce, SEO, and betting markets.

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Anna Tshngryan

Data Processing Specialist
UTC+01:00
Netherlands
Toptal Member Since June 30, 2022

Anna is a data scientist with four years of experience in data analysis and machine learning. She works on end-to-end processes, from data scraping, data collection, and pre-processing, cleaning, and data visualization to predictive modeling development. She is skilled in training a number of ML models, comparing them, and conducting error analyses. Anna is looking for projects that allow her to use data and machine learning to solve complex problems.

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Karol Ďuriš

Data Processing Specialist
UTC+01:00
Slovakia
Toptal Member Since February 25, 2026

Karol is a data scientist with 7+ years of experience delivering ML solutions across fintech, banking, travel, and industrial domains. With a focus on predictive modeling, customer analytics, and data-driven decision support, Karol has proven results such as doubling ancillary sales and improving hiring success rates.

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Badr Eddine

Data Processing Specialist
UTC+01:00
Luxembourg
Toptal Member Since June 20, 2022

Badr is a machine learning engineer focused on search, ranking, and applied LLMs, with 6+ years and an Oxford MSc (distinction). He has shipped 5+ production learning-to-rank models for eCommerce search, contributing 9-figure incremental revenue, and co-authored a cascade-ranking paper at The Web Conf (ACM 2025). He builds reliable generative AI: production RAG with evaluation and faithfulness checks. Badr takes on relevance audits, RAG reliability work, and moving prototypes to production.

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Claudio S. De Mutiis

Data Processing Specialist
UTC+01:00
United Kingdom
Toptal Member Since January 21, 2021

Claudio is a senior data scientist with experience in stakeholder management, recruitment, and line management. He is proficient in supervised, unsupervised, and reinforcement learning, including deep learning and neural networks. He has worked on several applications of machine learning and AI, including NLP and computer vision. Claudio has extensive industry experience, including retail/eCommerce, media, high-tech, startups, insurance, and healthcare.

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Arsine Sarikyan, PhD

Data Processing Specialist
UTC+04:00
Armenia
Toptal Member Since November 4, 2022

Arsine is a creative and scientifically rigorous data scientist with over three years of experience. Her experience includes designing experimentation processes such as data collection, robustness checks, and explainability, developing ML and AI strategies, and conducting NLP research. She specializes in causal analytics to answer the why question and find hidden patterns and relationships. Arsine contributes to the research community by writing and publishing academic papers.

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

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Testimonials

How to Hire Data Processing Specialists 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 data processing specialist for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new data processing specialist 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 Data Processing Specialists

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 data processing specialists 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 data processing specialist, 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 data processing specialist, 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 data processing specialists for your project.

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

  • You can hire data processing specialists 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 data processing specialist 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 data processing specialists can fully integrate into your existing team for a seamless working experience.

  • We make sure that each engagement between you and your data processing specialist 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 data processing specialist 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 Data Processing Specialists Are in High Demand.

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