Hire a Freelance Expert in Brazil

Milena A.

Brazilian Navy Medical Officer (Lieutenant) | Physician | Medical Writer | Scientific Research

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USD 30/hr
Medicina
Brazil

I am a physician and medical-scientific consultant with clinical experience in adult emergency medicine, occupational health, pre-hospital care...

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USD 30/hr
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Fernanda P.

Scientific Writer for Biotechnology & Natural Products Research |Author of 10+ scientific publications and book chap...

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USD 85/hr
Bioprocess Engineering and Biotechnology
Brazil

PhD in Bioprocess Engineering and Biotechnology with experience in scientific research, R&D, and technical writing. I collaborate with com...

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USD 85/hr
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Dr. Agda Aline R.

PhD | Medical Device Development | Biomaterials | Regulatory Strategy | From Lab to Market

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USD 50/hr
MBA in Industrial and Pharmaceutical Quality Management Auditing
Brazil

I am a Chemical Engineer with a PhD in Materials Science and Engineering and over a decade of experience in medical device R&D, biomaterial...

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USD 50/hr
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Dr. Gabriel C.

PhD Geochemist specializing in subsurface modeling, environmental risk assessment, and spatial data science.

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USD 50/hr
Doctor of Geology
Brazil

PhD Geochemist and Senior Geoscientist with over 15 years of technical experience in subsurface characterization, environmental data science, a...

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USD 50/hr
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Dr. Paul A.

Researcher in evolutionary biology. Expert in classification methods and in statistical modelling.

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USD 20/hr
PhD
Brazil

I am a Phd in paleontology. I mainly work on the evolution of extinct vertebrates like Crocodyliformes and Pterosaurs. My work focuses (1) on t...

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USD 20/hr
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Dr. Vasco N.

Researcher | Peer Reviewer | Data Scientist & Statistician

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USD 50/hr
PhD
Brazil

Has published 50+ articles in peer-reviewed astrophysical journals, population genomics magazines and conference proceedings, and STEM educatio...

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USD 50/hr
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Ana Célia S.

Biologist & Biotechnology Researcher | Botany, Natural Products & Scientific Research

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USD 30/hr
Licentiate Degree in Biological Sciences
Brazil

I am a Biologist and MSc researcher in Biotechnology at the Federal University of Bahia (UFBA), Brazil, with a background in Biology education,...

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USD 30/hr
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Dr. Gabriel B.

Ph.D. in Materials Science | Postdoc in Physics | Peer Reviewer & Research Consultant

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USD 40/hr
Materials Science and Engineering
Brazil

I am a Ph.D. in Materials Science and Engineering (Military Institute of Engineering - IME) with postdoctoral research in Condensed Matter Phys...

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USD 40/hr
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Lucas Daniel B.

Award-winning Rail Infrastructure Engineer | BIM, Transport Demand Modelling & PPP Feasibility

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USD 95/hr
Professional Master's in Management and Technology for Production Systems
Brazil

Civil engineer with over a decade in heavy infrastructure delivery, now Project Coordinator III at PÓLUX Engenharia in São Paulo, whe...

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USD 95/hr
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Dr. Rayana Amanda N.

Medical Doctor | Scientific Research | Medical Writing | Literature Review | Clinical Content Review

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USD 25/hr
Doctor of Medicine (MD Equivalent)
Brazil

I am a Brazilian medical doctor, graduated from the Regional University of Blumenau (FURB) in 2025, with clinical experience in Primary Health ...

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USD 25/hr
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Dr. Francisco D.

Pediatric Orthopaedic Surgeon & PhD | Fractures, Limb Deformities, Hip, Foot, Neuromuscular | University Professor

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USD 100/hr
PhD in Medicine and Health Sciences
Brazil

Orthopaedic and trauma surgeon with a PhD in Medicine and Health Sciences, residency training in orthopaedics and traumatology, and advanced sp...

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USD 100/hr
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Dr. Adonias A.

Electrical Engineer | Python Data Analysis, Optimization & Multi-Criteria Decision Analysis | Solar PV

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USD 10/hr
Master’s Degree in Renewable Energy
Brazil

I am an electrical engineer working at the intersection of data analysis, optimization, and energy engineering. I use Python to process time-se...

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USD 10/hr
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Dr. Simone W.

Physician | Medical Reviewer | Research & Evidence Synthesis | Medical Translator & Editor (EN<>PTBR)

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USD 40/hr
Medicina
Brazil

I am a physician and practicing general practitioner with experience in clinical research, systematic reviews, and evidence-based medical writi...

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USD 40/hr
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HEITHOR Q.

Remote Sensing Scientist | Geospatial Data Analyst | Python & GEE

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USD 50/hr
PhD Candidate
Brazil

I am a Geospatial Data Scientist, Remote Sensing Specialist, with extensive experience in applied geoinformatics, satellite image processing, a...

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USD 50/hr
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Dr. Angel B.

PhD Researcher | Scientific Review, Research Methodology, Data Analysis & Machine Learning

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USD 25/hr
Ph.D Electrical Engineering
Brazil

I am a PhD Engineer and Postdoctoral Researcher at the University of São Paulo (USP), with experience in Artificial Intelligence, Machine ...

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USD 25/hr
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Dr. Bruna V.

Veterinary Anesthesiologist | Medical & Scientific Writer | Clinical Research & AI Data Reviewer

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USD 40/hr
Postgraduate Specialization in Veterinary Anesthesiology, Pain Management and Intensive Care
Brazil

I am a Brazilian veterinarian specialized in Veterinary Anesthesiology, with experience in clinical practice, scientific research, veterinary r...

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USD 40/hr
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Guilherme S.

International Relations Researcher | Global Politics, Risk Analysis & Policy Research

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USD 20/hr
Bachelors in International Relations
Brazil

International Relations researcher and analyst with experience in geopolitical analysis, political risk monitoring, and international affairs r...

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USD 20/hr
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Dr. Verônica F.

Scientific Writer & Researcher | Biomedical Research | Literature Reviews

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USD 20/hr
Mestrado
Brazil

Dental professional and researcher with clinical and scientific experience in dentistry, including pediatric dentistry, craniofacial anomalies,...

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USD 20/hr
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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.

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

Kolabtree ensures safety and security of your payments and personal information and project details. Kolabtree’s T&C includes 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 arn’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 in case 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 arn’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.