level-one heading

Top Freelance SQL Experts for Hire

Arnault G.

Applied-research scientist with 9+ years designing and stress-testing production NLP/LLM systems.
Create Project
★★★★★
☆☆☆☆☆
USD 150/hr
Masters of Science
United Kingdom

Applied-research scientist with 9+ years designing and stress-testing production NLP/LLM systems. I lead red-teaming, bias evaluation and safet...

★★★★★
☆☆☆☆☆
USD 150/hr
Contact3

Aria Z.

PhD Materials Scientist | Polymer Nanotechnology & Delivery Systems | Advanced Analytical Characterization
Create Project
★★★★★
☆☆☆☆☆
USD 65/hr
Ph.D.
United States

PhD Materials Scientist specializing in organic synthesis, thin film systems, and formulation optimization. Skilled in advanced...analytical characterization and in communicating technical findings through grant proposals, research publications...

★★★★★
☆☆☆☆☆
USD 65/hr
Contact3

Salma K.

Fresh Data Scientist
Create Project
★★★★★
☆☆☆☆☆
USD 8/hr
Bachelor of Applied Science
Egypt

I am a computer engineering graduate, who is passionate about problem solving using artificial intelligence. I have worked on different AI proj...

★★★★★
☆☆☆☆☆
USD 8/hr
Contact3

Muhammad H.

NLP Behavioural Interventionist | Behavioral Data Analyst | Psychology & Data-Driven Insights | Bridging Human Behav...
Create Project
★★★★★
☆☆☆☆☆
USD 25/hr
BS Psychology
Pakistan

visionary problem-solver with a unique knack for understanding how people truly tick, and how that shapes business success. My varied journey h...

★★★★★
☆☆☆☆☆
USD 25/hr
Contact3

Dr. Aurora C.

Bioinformatics & aDNA Specialist | PhD in Molecular Biology | Expert in Snakemake Pipelines & Population Genetic...
Create Project
★★★★★
☆☆☆☆☆
USD 45/hr
Doctorate
Spain

I am a PhD-trained molecular biologist with over 6 years of postdoctoral experience in bioinformatics, specializing in ancient DNA (aDNA), popu...

★★★★★
☆☆☆☆☆
USD 45/hr
Contact3

Dr. Erandika K.

Computational Chemist & Data Scientist | Machine Learning, Data Analysis, Cheminformatics, Molecular Modeling
Create Project
★★★★★
☆☆☆☆☆
USD 50/hr
Ph.D.
Sri Lanka

I am a computational chemist and data scientist with experience applying machine learning, statistical modeling, and data analysis to complex c...

★★★★★
☆☆☆☆☆
USD 50/hr
Contact3

Dr. Andrea C.

Bioinformatics & Software Engineering Consultant | RNA & Cancer Genomics | NGS Pipelines | Structural Biology &a...
Create Project
★★★★★
☆☆☆☆☆
USD 50/hr
Master's degree
Italy

I provide advanced bioinformatics and software engineering solutions in RNA and protein structure modeling, cancer genomics, and next-generatio...

★★★★★
☆☆☆☆☆
USD 50/hr
Contact3

Yuncheng J.

Freelance Quantitative Methodologist & Statistical Diagnostician | R, Bayesian & Predictive Modeling | Biostatis...
Create Project
★★★★★
☆☆☆☆☆
USD 40/hr
Master in Public Health
Thailand

I am a quantitative methodologist, active peer reviewer, and researcher with an academic background in Public Health and Agronomy. I specialise...

★★★★★
☆☆☆☆☆
USD 40/hr
Contact3

Dr. Amine M.

I am an academic, a researcher, a computer scientist, an entrepreneur, and an educator. I prefer the latter.
Create Project
★★★★★
☆☆☆☆☆
USD 25/hr
Ph.D. in Computer Science
Algeria

I am an academic, researcher, computer scientist, and entrepreneur with a robust educational background and extensive experience across academi...

★★★★★
☆☆☆☆☆
USD 25/hr
Contact3

Diana S.

Geoscience Data Analyst | Asbestos & Environmental Data | Python & AI Extraction
Create Project
★★★★★
☆☆☆☆☆
USD 25/hr
Attestation of College Studies AEC in Artificial Intelligence and Machine Learning
Canada

I am a Geologist and Laboratory & Data Analyst with experience in environmental analysis and geoscience data. Currently, I analyze asbest...

★★★★★
☆☆☆☆☆
USD 25/hr
Contact3

Dr. Robbie C.

Computational neuroscientist with virtual healthcare industry experience.
Create Project
★★★★★
☆☆☆☆☆
USD 150/hr
PhD | Neuroscience
United States

AI/ML Engineer and Data Scientist with a decade of experience driving digital health innovation from startup inception to large-scale data solu...

★★★★★
☆☆☆☆☆
USD 150/hr
Contact3

Andrew L.

Full-Stack AI Engineer | LLM & GenAI Specialist | GPT/RAG Integration | Scalable AI Solutions for Real-World Impa...
Create Project
★★★★★
☆☆☆☆☆
USD 40/hr
Masters of Science
United States

I am an AI Engineer and Full-Stack Machine Learning Specialist with over 10 years of experience building and deploying end-to-end AI systems in...

★★★★★
☆☆☆☆☆
USD 40/hr
Contact3

Md. Sabbir A.

Data Science, HCI & Responsible AI Researcher | Research & Publication Consultant
Create Project
★★★★★
☆☆☆☆☆
USD 75/hr
Master of Science in Computer Science and Engineering
Australia

I am a Senior Lecturer in Computer Science and a researcher in Data Science, HCI, and...Responsible AI, with strong expertise in Quantitative Research Methods, Machine Learning, and Research Publication...

★★★★★
☆☆☆☆☆
USD 75/hr
Contact3

Fernando R.

Statistical Consultant | Data Scientist | Research, Clinical & Survey Analysis (R / Python / SPSS)
Create Project
★★★★★
☆☆☆☆☆
MBA
Brazil

I am a data scientist and statistical consultant specializing in applied statistical analysis for research and data-driven projects. My work f...

★★★★★
☆☆☆☆☆
Contact3

Dr. Tanise B.

Data Scientist | PhD in Economics | Antitrust & Competition Policy | Python, R, SQL
Create Project
★★★★★
☆☆☆☆☆
USD 50/hr
PhD in Economics
Brazil

I'm a data scientist with a PhD in Economics and 10 years of experience in the Brazilian public sector, specializing in antitrust enforceme...

★★★★★
☆☆☆☆☆
USD 50/hr
Contact3

Jérémy M.

Bioinformatician & Data Engineer | 5+ Yrs in Biology Industry | NGS Data Analysis & Pipeline Development (Python...
Create Project
★★★★★
☆☆☆☆☆
USD 115/hr
MSc Bioinformatics and System Biology
France

BRIDGING COMPUTATIONAL BIOLOGY & SCALABLE DATA ENGINEERING I am a Bioinformatician & Data Engineer (5+ years exp.) specializing in the...

★★★★★
☆☆☆☆☆
USD 115/hr
Contact3

Anupam N.

Freelance Data Scientist, Data Analyst & Poet | Expert in Python, SQL,STATA, SPSS, EViews, Excel
Create Project
★★★★★
☆☆☆☆☆
USD 13/hr
PhD
India

Data Scientist with ~4 years of experience building statistical and machine learning models for banking, analytics, and business decision syste...

★★★★★
☆☆☆☆☆
USD 13/hr
Contact3

Adil H.

Clinical Data Scientist | RWE · ML · Survival Analysis · NGS Bioinformatics · GCP | Q1 Publi...
Create Project
★★★★★
☆☆☆☆☆
USD 30/hr
Master of Engineering in Bioinformatics
Spain

Clinical Data Scientist specialising in Real World Evidence (RWE) and machine learning applied to clinical data. I work with real-world Electro...

★★★★★
☆☆☆☆☆
USD 30/hr
Contact3

Zahid A.

Economist. Data Analyst. International Trade and Customs Expert.
Create Project
★★★★★
☆☆☆☆☆
USD 30/hr
International Economics in the age of Globalization
Pakistan

I am an economist and data analyst with specialized expertise in international trade and customs. My work sits at the intersection of economic ...

★★★★★
☆☆☆☆☆
USD 30/hr
Contact3

Dr. Subrata S.

Materials Scientist & Data Analyst | Expert in EIS | Numerical Simulation | Data Visualization
Create Project
★★★★★
☆☆☆☆☆
USD 50/hr
Ph.D.
United States

PhD‑trained materials scientist with 12+ years of research experience spanning device physics, electrochemical systems, and energy‑related mate...

★★★★★
☆☆☆☆☆
USD 50/hr
Contact3

David K.

Data Labeling Specialist | Python | Computer Vision | Dataset QA & Annotation
Create Project
★★★★★
☆☆☆☆☆
USD 18/hr
BA Psychology
Kenya

Detail-oriented data labeling specialist with experience annotating video and image datasets for computer vision and sports analytics pipelines...

★★★★★
☆☆☆☆☆
USD 18/hr
Contact3

David K.

Environmental Data Scientist | Advanced R Programming, Statistics & Literature Reviews
Create Project
★★★★★
☆☆☆☆☆
USD 60/hr
MPhil Environmental Science
Australia

I'm David, an Environmental Data Scientist and Literature Review Specialist with over six years of experience in both academic research and...

★★★★★
☆☆☆☆☆
USD 60/hr
Contact3

Dr. Lida A.

Data Scientist (Math PhD) | Building NLP, RAG, and Mathematical Modeling for Human-Centered Research
Create Project
★★★★★
☆☆☆☆☆
USD 175/hr
Mathematics
United States

I am a PhD Mathematician and Data Scientist currently working on computational phenomenology and neuroimaging analysis. My work focuses on the ...

★★★★★
☆☆☆☆☆
USD 175/hr
Contact3

Dr. Sadi Evren S.

AI Strategy & Data Science Expert | LLMs, Predictive Modeling, Customer Analytics, Banking & Telecom
Create Project
★★★★★
☆☆☆☆☆
USD 150/hr
PhD.
United States

I am an AI strategy expert, data scientist, and academic with over 15 years of experience in artificial intelligence, machine learning, and dat...

★★★★★
☆☆☆☆☆
USD 150/hr
Contact3

Nomusah N.

Information Systems Audit Expert | IT Risk & Compliance | Research Support
Create Project
★★★★★
☆☆☆☆☆
USD 50/hr
Master of Commerce (Information Systems)
South Africa

I am an IT professional with over a decade of experience across various domains including IT governance, risk management, compliance, and infor...

★★★★★
☆☆☆☆☆
USD 50/hr
Contact3

Kolabtree is the leading online marketplace for SQL experts. Post your project, get bids, and hire qualified experts quickly and easily.

pay-per-click
Confidentiality Assured

We take several measures to help you work with full confidence and peace of mind.

Keep your project private

Restrict who can see your project and send you proposals. Invite only specific freelancers to view your project.

NDAs and IP protection

Our T&C include a default confidentiality clause that protects your IP and NDA for added protection before disclosing project details.

Kolabtree ensures the safety and security of your payments, personal information and project details. Kolabtree’s T&C include a default confidentiality and NDA clause.

You will receive detailed proposals directly from Kolabtree. These proposals will include a comprehensive Statement of Work (SOW), project fees, milestones and deadlines.

You can choose to pay either a fixed or an hourly fee based on your scope of work. Pre-pay for the next milestone. You have to approve the deliverables only if the quality meets your expectations. If you aren't happy, we'll refund your money.

Kolabtree will share multiple quotations for your project. You have the freedom to accept the quote that aligns with your project requirement and budget. You can get in touch with us if you want to discuss the fee.

Our T&C include a default confidentiality clause that protects your IP and NDA for added protection.

Why Kolabtree

Contact experts directly

Speak directly with freelancers and explain your requirements.

100% satisfaction guaranteed

You have to approve the deliverables only if quality meets your expectations. If you aren't happy, we'll refund your money.

Project Management

Keep track of files and conversations in the user-friendly Workspace.

Flexible, secure payments

You can choose to pay either a fixed or an hourly fee based on your requirement.

How it works View full page
1

Post your Project (Free)

Your project details are safe, secure and visible only to logged-in users.

2

Get Quotes & Choose Experts

Discuss your requirements in detail with the experts before accepting the final statement of work from Kolabtree.

3

Collaborate

Pre-pay for your project and work with the expert to get your desired output. Keep track of files and conversations in the user-friendly Workspace.

4

Job Done!

Approve the deliverables once you're satisfied with the job done.