Hire the Top 3% of Freelance Data Transformation Specialists

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

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance Data Transformation Specialists

Cheng-Chieh Huang

Freelance Data Transformation Specialist
United StatesToptal Member Since November 10, 2023

Cheng-Chieh is a Cognos developer and administrator with nearly a decade of experience working on enterprise-level environment projects for companies like Vanguard and Bayer. He assisted clients in achieving savings of $28 million by designing and implementing a precise and all-encompassing tax reporting system using Cognos BI. Cheng-Chieh also streamlined a tax statement process through automation, resulting in a 10% reduction in the number of temporary employees required during the tax period.

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Dauren Baitursyn

Freelance Data Transformation Specialist
United Arab EmiratesToptal Member Since November 18, 2021

Dauren is a skilled data scientist and software engineer with vast experience across the banking sector, fast-moving consumer goods (FMCG), and chat-bots. He holds a computer science bachelor's degree from the Korea Institute of Science and Technology (KAIST), one of the top 50 universities by QS ranking. He has excellent knowledge of Python, SQL, and Power BI. Dauren has worked with several teams on different business domains and is an excellent communicator.

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Dusan Nosal

Freelance Data Transformation Specialist
SlovakiaToptal 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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Mary Baculi

Freelance Data Transformation Specialist
CanadaToptal 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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Roderick Lee

Freelance Data Transformation Specialist
United StatesToptal Member Since June 18, 2020

Roderick is an information management expert specializing in business intelligence and data development. He is fully versed in all aspects of the data warehouse lifecycle, including data design, ETL, reporting, installation, implementation, and administration. Roderick seeks a pivotal role to leverage his substantial experience and skills and add value, stability, and success to a growing organization.

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Jayesh Menon

Freelance Data Transformation Specialist
AustraliaToptal Member Since February 26, 2024

Jayesh is a seasoned data product and data management professional with over 16 years of experience delivering products and programs in data quality management, governance, and migration. He has an extensive track record in various industries, including transport, consumer goods, energy, and telecommunications. Jayesh looks for newer and enriching opportunities that will allow him to leverage his expertise in growing businesses through effective results.

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Tugba Demirci Kasarci

Freelance Data Transformation Specialist
TurkeyToptal Member Since June 14, 2022

Tugba is a seasoned BI developer and data analyst with a decade of experience in leading firms. Her expertise spans DWH, SQL, and data visualization tools like MicroStrategy, Tableau, and Power BI. She excels in project management and has spearheaded integration and reporting projects for a major domain in a top airline. Tugba ensures accuracy in data-driven decision-making by delivering top-notch data environments and reports. She's known for her swift, proactive problem-solving approach.

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Pedro Roque

Freelance Data Transformation Specialist
BrazilToptal Member Since March 3, 2022

Pedro is a problem solver and a passionate data person. Currently working at a data consulting company as an analytics engineer, he is in charge of creating data models and transformations using DBT and SQL, creating Python scripts to get data from APIs, web scraping, and orchestrating using Prefect. Pedro also has experience with reporting data, data visualization (Microsoft Power BI, Tableau, Looker), data engineering (Python, APIs), and data analysis (Snowflake, BigQuery, SQL-Server).

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Daniel Roca

Freelance Data Transformation Specialist
SpainToptal Member Since June 9, 2022

Daniel has over seven years of experience in data analytics projects. He began his career as a data analytics consultant in multiple industries, creating data-oriented solutions that helped businesses transform and grow. After that, he switched to the tech industry and worked mainly on business intelligence and machine learning projects assisting companies in reaching their strategic objectives. Daniel enjoys helping transform data into the companies' most valuable asset for decision-making.

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Tomislav Delas

Freelance Data Transformation Specialist
CroatiaToptal Member Since July 16, 2020

Tomislav is a seasoned IT expert with a demonstrated history of successfully working in the computer software industry since 1996. The bulk of Tomislav’s expertise lies in developing BI and data warehouse solutions using Informatica and IBM DataStage ETL (both administration and development). Tomislav also knows his way around SQL and PL/SQL, Tableau visualizations, Oracle database administration (Oracle OCP), big data, cloud databases (Google BigQuery, AWS), and cloud eCommerce.

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Harpreet Kaur

Freelance Data Transformation Specialist
CanadaToptal Member Since September 7, 2021

Harpreet is an accomplished and self-motivated MuleSoft developer with over seven years of experience designing, developing, and implementing application integration solutions using Mule ESB, TIBCO, and Java. She is also experienced in developing Mule ESB flows and integrations using SOA and Enterprise Application Integration (EAI) using Mule runtimes. Harpreet enjoys using her skills to contribute to the exciting technological advances that happen every day.

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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
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


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


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


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


How to Hire Data Transformation Specialists Through Toptal


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.

Work With Hand-Selected Talent

Within days, we'll introduce you to the right Data Transformation specialist for your project. Average time to match is under 24 hours.

The Right Fit, Guaranteed

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


  • How are Toptal Data Transformation specialists different?

    At Toptal, we thoroughly screen our Data Transformation 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 Transformation specialists in less than 48 hours through Toptal?

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

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

    We make sure that each engagement between you and your Data Transformation 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 Transformation Specialists Are in High Demand.

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