Hire the Top 3% of Freelance Data Cleaning Specialists

Toptal is a marketplace for Data Cleaning Specialists. Top companies and startups choose Toptal Data Cleaning freelancers for their mission-critical Data Cleaning development projects.

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance Data Cleaning Specialists

Art Vancil

Freelance Data Cleaning Specialist
United States
Toptal Member Since March 9, 2020

Art has 25 years of data architecture and cloud-computing consulting experience—mostly in building enterprise data warehouses. Art is an end-to-end solution architect and chief problem solver with a long history of focused execution—according to a statement of work—and successful delivery in a team setting.

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Alex Clark

Freelance Data Cleaning Specialist
United States
Toptal Member Since November 14, 2022

Alex is an innovative and experienced big data engineer, skilled in a wide variety of tools and technologies. He is competent in all aspects of the data science process, including data ingestion, storage, transformation, and statistical modeling. Alex has a proven track record of thoughtfully dissecting business problems, vetting requirements, and then designing the processes to address them.

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Mary Baculi

Freelance Data Cleaning Specialist
Canada
Toptal Member Since February 17, 2022

Mary is a result-driven data architect that delivers data analytics to senior management. She is a detail-oriented and organized professional with 21 years of expertise in all phases of system development and project life cycles. Mary has collaborated with SMEs, project managers, business analysts, developers, quality assurance specialists, vendors, and cloud providers to deliver information solutions following Agile methodology.

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Kiran Kumar Kolla

Freelance Data Cleaning Specialist
Australia
Toptal Member Since July 28, 2021

Kiran is a database engineer with over ten years of expertise implementing data lakes, data integrations, and data warehousing solutions. In addition to data engineering work with Cognizant and wireless with NBN Co, Kiran has enterprise experience in financial services from MetLife, ING Group, to Bank of America. He is highly motivated when challenges are thrown at him, as they bring out his best! Kiran loves to program and use logical thinking to solve complex problems efficiently.

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Wenlong Dong

Freelance Data Cleaning Specialist
Australia
Toptal Member Since January 21, 2022

Wenlong is a senior data engineer with over half a decade of experience building data and ETL solutions primarily in SQL and Python. He has strong experience in building data pipelines and is familiar with various tools like DBT, Snowflake, Redshift, Python, Airflow, Power BI, Excel VBA, and PowerShell. Finally, he has led projects including fuzzy mapping in Python, end-to-end data pipeline with Dataiku and Anaplan, Salesforce data migration, and omnichannel models in DBT, Redshift, and Airflow.

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Liam Moore

Freelance Data Cleaning Specialist
Belgium
Toptal Member Since July 11, 2022

Liam is a machine learning scientist and engineer from a particle physics research background with experience leading various industry projects. He specializes in building bespoke statistical models, either using modern deep learning algorithms or classical machine learning combined with domain knowledge. Liam focuses on applying, developing, and keeping up to date with modern research while working with clients who care about creating social value.

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Tomasz Zielański

Freelance Data Cleaning Specialist
Poland
Toptal Member Since January 28, 2022

Tomasz is a data engineer with five years of industry experience. He specializes in engineering data pipelines, and he has significant experience in reporting and using machine learning for analytics in banking and fintech. Tomasz excels at using data to solve business challenges, and he often finds that data engineering is the most significant part of a data solution.

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Dusan Nosal

Freelance Data Cleaning Specialist
Slovakia
Toptal Member Since October 31, 2022

Dusan is a BI analyst and developer with experience across multiple business areas—banking, real estate, insurance, municipality, newspapers, and cinemas. He is passionate about the entire process of designing BI solutions, from analyzing source data through the design and creation of data warehouses, ETL processes, and data marts to the final visualization. Dusan's background is primarily with Microsoft and Oracle BI tools.

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Katharine Rovinsky

Freelance Data Cleaning Specialist
Spain
Toptal Member Since January 20, 2022

Katharine is a passionate and business-focused analytics professional with ten years of experience leveraging CRM and database insights. She has proven success in supporting decision-makers across marketing, sales, and product teams at Nielsen and Dell Technologies and, most recently, managing analytics at a startup. Expert in SQL, customer database insights, dashboarding, and reporting via Looker and Tableau, Katharine loves working with data and helping inform business strategy.

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Muhammad Bilal

Freelance Data Cleaning Specialist
Pakistan
Toptal Member Since September 19, 2022

Muhammad has seven years of experience transforming raw data into useful insights for enterprises. An enterprise resource planning (ERP) developer turned into a data engineer, he is an expert in database (DB) and data warehouse (DWH) design, writing complex SQL queries, and ETL development using native and 3rd-party tools and utilities. Muhammad is a data-focused person who profoundly understands every step of designing data ingestion pipelines and ETL processing.

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Sait Dogan

Freelance Data Cleaning Specialist
United Kingdom
Toptal Member Since March 28, 2022

Sait is a data engineer with 15+ years of ETL development experience. He implemented many greenfield data warehouse projects in diverse sectors, such as telecommunications, banking, and insurance systems. For the last 5+ years, he's also been involved in big data projects.

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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
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

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley

Director

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller

CEO

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik

Co-Founder

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee

Principal

How to Hire Data Cleaning Specialists Through Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering 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 Cleaning specialist for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new Data Cleaning specialist for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

FAQs

  • How are Toptal Data Cleaning specialists different?

    At Toptal, we thoroughly screen our Data Cleaning specialists to ensure we only match you with talent of the highest caliber. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You’ll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs.

  • Can I hire Data Cleaning specialists in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a Data Cleaning specialist within 48 hours of signing up.

  • What is the no-risk trial period for Toptal Data Cleaning specialists?

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

Tap Into World-Class Talent

  • Trusted Experts Only

    Trusted Experts Only

    All of our talent are seasoned experts who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

  • The Right Fit

    The Right Fit

    We have a knack for matching you with the right fit. Start working with your new hire on a no-risk trial period, paying only if satisfied.

  • Scale as Needed

    Scale as Needed

    Hire talent within 48 hours and scale your team up or down as needed, no strings attached.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDA’s. Let us take care of the overhead while you focus on building great products.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.

  • Expert Talent Matching

    Expert Talent Matching

    Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.

Top Data Cleaning Specialists Are in High Demand.

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