How are Toptal Data Validators different?

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

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

What is the no-risk trial period for Toptal Data Validators?

We make sure that each engagement between you and your Data Validator 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.

Hire the Top 3% of Freelance Data Validators

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

Hire a Top Data Validator Now

No-Risk Trial, Pay Only If Satisfied.

Trusted by leading brands and startups

Watch the case study

Hire Freelance Data Validators

View Federico

Federico Pereiro

Freelance Data Validator

NetherlandsToptal Member Since November 4, 2015

Federico is a full-stack JavaScript developer and open source contributor. He works remotely with international customers, specifying, implementing, and provisioning web applications. His focus is on developing radically simple systems for solving complex problems.

Data Validation Open Source Redis Node.js JavaScript Vanilla JS Web Architecture API Design REST APIs Back-end Full-stack + more

View Vamsi

Vamsi Darbhamulla

Freelance Data Validator

CanadaToptal Member Since March 18, 2022

Vamsi is a software development engineer specializing in test architecture with 14 years of experience building customized, scalable test automation solutions across different domains. He has extensive testing and DevOps experience building and maintaining various CI/CD pipelines that provide a faster feedback loop to agile delivery teams.

Data Validation Java Node.js Mocha Chai Docker Selenium WebSockets Test Automation Apache Maven SQL JavaScript Quality Assurance (QA)+ more

View Juro

Juro Oravec

Freelance Data Validator

United KingdomToptal Member Since March 2, 2022

Juro's skill set is that of a software startup co-founder—solutions architect, full-stack developer, data engineer, project manager, user researcher, business consultant and strategist, a bit of DevOps, mediocre designer, mediocre salesman, mediocre marketing guy, and a great comedian. He's deployed projects in academia, biotech, pharma, and marketing domains. Juro excels in highly complex systems.

Data Validation Git Docker TypeScript GraphQL Vue Firebase PostgreSQL Node.js Python Web Extensions SQL Redis + more

View Hannah

Hannah Iara Silva

Freelance Data Validator

BrazilToptal Member Since September 7, 2023

Hannah is a business intelligence consultant and Power BI developer with eight years of experience manipulating data and building visualizations for leading companies. She has a solid background in BI as a data analyst, developer, engineer, and product owner. Hannah is diligent in ensuring accuracy and context to clarify questions through data visualization. She excels in transforming complex data into clear insights using cloud computing, programming languages, and Power BI.

Data Validation Microsoft Power BI SQL Trello Data Analysis Data Visualization Data Modeling Business Intelligence (BI)DAX Data Analytics ETL Databases Data Pipelines + more

View Alvaro

Alvaro Parra

Freelance Data Validator

BoliviaToptal Member Since July 16, 2021

Alvaro is a data engineer with over seven years of experience working on ETL pipelines and databases. He is a certified MCSA SQL database developer with expertise in Azure, Databricks, Python, Airflow, and Snowflake. Alvaro has engineered data solutions for banking, credit card, pharmaceutical marketing, and oil companies. His work has significantly increased revenue, cut expenses, and reduced processing times.

Data Validation ETL SQL Data Engineering Python Data Analysis Data Warehousing Databases Snowflake SQL Stored Procedures T-SQL (Transact-SQL)+ more

View Marijo

Marijo Alilović

Freelance Data Validator

CroatiaToptal Member Since June 15, 2022

Marijo is an experienced data scientist with a strong mathematics and mathematical statistics background. He is proficient in statistical analysis, data handling, and optimization techniques and effectively translates complex data into actionable insights, leveraging solid analytical reasoning and precise communication skills. Marijo is detail-oriented, proficient in R, SQL, and Python, and passionate about delivering data-driven solutions across diverse domains.

Data Validation R RStudio RStudio Shiny Statistics Data Cleaning Data Visualization Data Scientist + more

View Raja

Raja Bollepally

Freelance Data Validator

IndiaToptal Member Since April 10, 2023

With nine years of professional experience, Raja has worked as a pharmaceutical analyst during five of them, making him an expert in pharmaceuticals and lab processes. He's keen on developing, testing, and deploying objects with LabWare LIMS, thus accommodating good exposure to integrating this tool with other instruments.

Data Validation

View Fahad

Fahad Mukhtar

Freelance Data Validator

PakistanToptal Member Since September 7, 2022

Fahad has over eight years of experience working as a senior QA with knowledge of the whole QA and testing processes. He's experienced in designing, creating, executing, and planning testing strategies, ensuring quality in all software development stages from design to deployment. Fahad is a senior QA engineer passionate about the reflective user journey, user satisfaction, and innovation and has tested web, Web3, mobile, game, and API technologies for products with millions of users.

Data Validation UI Testing UX Testing Regression Testing API Testing Functional Testing Mobile App Testing Website Testing Jira Postman Slack BrowserStack User Acceptance Testing (UAT)+ more

View Narayan

Narayan Nandeda

Freelance Data Validator

IndiaToptal Member Since July 31, 2019

Narayan is a data scientist with 10+ years of experience in statistical modeling, NLP, ML, deep learning, AI, and GenAI. He's experienced in deploying ML solutions across the healthcare, retail, supply chain, telecom, and eCommerce domains. Narayan has been designing, developing, and deploying data science solutions using Python and R since 2011. He's an expert in supervised and unsupervised ML, regression, classification, forecasting, reinforcement learning, GANs, and Keras.

Data Validation Data Mining Natural Language Toolkit (NLTK)Jupyter Statistics Python Keras Deep Learning Linear Regression Machine Learning Natural Language Processing (NLP)Linear Programming OpenCV + more

View Kevin

Kevin Saul

Freelance Data Validator

United StatesToptal Member Since December 12, 2022

Kevin is a senior data engineer and professional services consultant providing software solutions for large and complex data storage, integration, analysis, and reporting. He has 22 years of experience developing, delivering, and maintaining data-centric software solutions and eight years of experience in analytical chemistry for the environmental and biotech industries. He has a special interest in developing innovative solutions for sustainable agriculture and land reclamation.

Data Validation SQL Microsoft Power BI Azure SQL Data Warehouse Design ETL SQL Stored Procedures SQL Performance Microsoft SQL Server SQL Server Analysis Services (SSAS)SQL Server 2014 SQL Server 2008 Data Integration + more

View Ryan

Ryan Lind

Freelance Data Validator

CanadaToptal Member Since October 8, 2021

Ryan has over 10 years of experience in data engineering, database development, data warehousing, business intelligence, and reporting. He has a passion for bringing data together for analysis to support data-driven decision-making. Ryan strongly believes in supporting data quality and maintaining a source of truth for organizations.

Data Validation Windows SQL Server Management Studio (SSMS)SQL Server 2016 SQL ETL SQL Server Reporting Services (SSRS)Data Warehousing Business Intelligence (BI)Data Modeling Database Design Database Development Data Engineering + more

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Trustpilot

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

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 Validators 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 Validator for your project. Average time to match is under 24 hours.

The Right Fit, Guaranteed

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

FAQs

How are Toptal Data Validators different?
At Toptal, we thoroughly screen our Data Validators 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 Validators in less than 48 hours through Toptal?
Depending on availability and how fast you can progress, you could start working with a Data Validator within 48 hours of signing up.
What is the no-risk trial period for Toptal Data Validators?
We make sure that each engagement between you and your Data Validator 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
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
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
Hire talent within 48 hours and scale your team up or down as needed, no strings attached.
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
Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.
Expert Talent Matching
Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.