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On average, 13 Hadoop projects are completed every quarter on Upwork.


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Hadoop Upwork freelancers typically receive a client rating of 4.78.

Last updated: October 1, 2015

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Ruslan M.

Ruslan M.

Java Architect, Software Engineer, Senior Web Developer

Sweden - Tests: 1

Creative and resourceful technology developer with 7 years of hands-on professional experience and advanced theoretical knowledge.  Make complex business processes faster, cheaper, and better, proposing and creating quality technology.  Analyze and tackle complex challenges and obstacles, devising out-of-the-box solutions and alternatives.  Maximize capabilities and user-friendliness of products, leveraging latest tools, technologies, and trends.  Work equally as effective independently or as key team player or leader, continually designing and delivering technology which meets and exceeds customer expectations.

$16.67 /hr
0 hours

Andrey N.

Andrey N.

An experienced pythoneer and web developer

Thailand - Tests: 3 - Portfolio: 2

I'm a Russian expat currently staying in Thailand. Before I decided to move abroad and work as a freelancer, I used to be a programmer and CTO, so I have deep knowledge of both business needs and appropriate technical solutions. I also have a great understanding of low-level computer principles and codes; I have been writing some C++ and x86 assembler codes for a few years. I've been coding since I was 14. As a student, I took part in an IT competition and won 3rd place in my city. Most of these competitions strongly relies on algorithms and mathematics, so I do have knowledge of programming patterns and algorithms as well. I switched to Python as my main programming language more than 5 years ago. I found it simple, clean, reliable and powerful. Soon after that, I noticed Django and started using it when it was an early pre-release version. Whether you need a complex, corporate-level solution such as a social network, or just a small script performing a simple task - I will do it quick and efficient. How a good IT solution should look like? It must be: - reliable: I always test my code; - solid: I think through all the important details and features before typing any symbol of code; - complete: my solutions will satisfy your business needs for 100% and even more; - high-quality: forget about stupid or unclear code - I follow all the theoretical and practical principles of writing code (including standards such as PEP8). The list of technologies and programs I worked with: ★ Python, Django, Flask, many external Python libraries ★ CSS, HTML, Java Script (including libraries such as jQuery) ★ MySQL, PostgreSQL, MongoDB, SQLite ★ Lighttpd, Nginx, Apache, Cherokee, Tornado ★ High-load optimization (including creating the appropriate project architecture, database design, code refactoring, choosing right tools etc.) ★ Selenium ★ Git, Mercurial;,, ★ Many data formats and files, such as binary, graphic, audio, plain-text, CSV, XML, OpenOffice and MS Word formats ★ Mac OS, Linux (including console and server administration), Windows, iOS, Android ★ PyCharm, Sublime Text, Text Mate, nano, vim; intermediate Photoshop skills

100% Job Success
$29.00 /hr
2,527 hours



Data Engineer - DW/BI & Big Data Hadoop, Spark, NoSQL

United Kingdom - Portfolio: 4

Holds Engineering degree in Computer Science and experienced in building Enterprise DW/BI and Big data application. Experienced in migrating traditional Data Warehouse application to Big data Lambda architecture. I have operated in Great Britain (London) area working for Tier 1 business organisations in building enterprise DW and Big data applications. Trained in Big Data eco systems (Hadoop, Map Reduce, Pig, HiveQL, HBase, Spark - Shark). Implementation of Big data Lambda architecture in a multi node clusters in Hadoop 2.0 Having hands on experience in major RDBMS like MySQL, Oracle, PostgreSQL, SQL Server and NoSQL - MongoDB with document Query Language. Specialties: • DW/BI and OLAP Data modelling (Star, Snowflake schema, Normalisation, ) • ETL data Integration through Pentaho Data Integrator (KETTLE, SPOON) and Python ETL, Oracle SQL Loader, Oracle Data Pump. • Advanced PostgreSQL and PLPgsql/ PL/SQL programming (Functions, Packages, Collections, Partitioning, Hierarchical queries, Bulk Binding, Inlining, Indexing, Dynamic SQL, Analytical function, Data Mining API, Performance tuning, SQL factory, pipelined function Explain Plan, Trace O/P etc.) • Java, Collections - List, Tree, Hash Map, Set etc., Generics, Fork - Join. • Data visualization, Dashboard Creation, Customer Scorecard and KPI Modelling • Reporting - Tableau Data visualization. Analytical report, Operational Report, Subjective and Statistical Analysis on customers, data, Multi-variate analysis, clustering, K-means, Hypothesis Testing. • BIG Data eco system : o Data Mgmt : Hadoop & YARN o Data Access: Java Map Reduce, Pig, Hive, Solr, Spark, HBase, Storm. o Governance & Integration: Sqoop, Flume, Kafka o Operations: Oozie, Zookeeper o Libraries: Spark SQL, Spark mlib. o NoSQL: Mongo DB, HBase • Functional Programming using Scala and implementation of Spark streaming.

$22.22 /hr
0 hours

Jose Martinez

Senior Python developer, Devops, System Administrator,

Mexico - Portfolio: 7

Developer since 2006, looking for get more experience in the intelligent systems area, mobile devices and visual computing, also I want to develop more skills on my expertise area. While studying at Tecnologico de Monterrey I developed an Augmented reality project with python and C++, years after at my job at Walmart of mexico I used python to develop a module for converting data types. I learned python-Django at 2010 and for 2012 I start to work at where developed several modules using python-django, elastichsearch, mongodb and Neo4J (jobs seekers, jobs post, search of users, etc) For 2013 started to develop the architecture of the plataform called using python-django, mongodb and the mongoengine ORM also Neo4j and his ORM to Django Neo4jango.

$21.11 /hr
0 hours

Gurpreet Singh

Gurpreet Singh

Tableau & Pentaho BI Professional

India - Tests: 1

I strive to achieve quality, correctness, performance and maintainability in the products I write. I believe a sound understanding and application of software engineering principles is more valuable than familiarity with popular tool sets. I am BI professional having comprehensive knowledge of designing and analyzing data warehouse using data modeling and data warehouse methodologies. I am skilled in analyzing user requirements and building front-end BI applications , knowledgeable of project management and development life cycle

$20.00 /hr
5 hours

Arun Kumar

Arun Kumar

Over 16 yrs IT consulting, Testing and support experience

India - Tests: 1

Over 16 years of diverse experience in Information Technology with Extensive Knowledge in Financial Domain, Banking and Payments Applications and customer service. Over 6 years of IT Operations and Technical Recruitment, liaising with various clients, vendors, supplier and candidates. Over 6 year of Strong experience in manual testing and automated testing of Client/Server and Web based applications using tools like Test Director, Rational test tool and Loadrunner. Over 4 years working in the UK and European Client Locations, UAT at European central Bank, Frankfurt as Lead Test analyst. Over 4 years of Implementing Banking Application, Application Support and Training users. Over 3 years of Installation, maintenance, trouble shooting/customer support and user training on retail banking system Over 1 year of IT technical recruitment experience. Extensive Knowledge in Swift Standards, Testing Standards and Payment Standards Strong experience in both Manual and Automated Testing of applications on Windows and Unix Environment. Executed Benchmark tests based byte magazine kdlucas/byte-unixbench in github. Extensive experience in performing Regression testing, Functional testing, System testing, Black Box testing, Integration testing, UAT testing, Back-end testing, GUI testing, Load testing, Performance testing and Volume & Stress testing as well as development, execution, and maintenance of Test plans, Test scenarios, Test Cases and Test Conditions. Well Versed in writing complex SQL Statements, Queries and Cursors. Strong RDBMS experience and testing RDBMS such as Oracle, MS SQL, DB2 and access Good Understanding on the phases of Software Development Life Cycle (SDLC) and models. Extensive experience in Operating Systems like Windows 95, 98, NT and 2000 platforms, Aix, Sun Solaris, UNIX and AS/400. Strong experience in designing Test Plans, defining Test Cases, performing Verification & Validation, maintaining test scripts, creating Requirements Traceability Matrix & analyzing bugs. Well versed in Black Box Testing and good knowledge of White Box Testing. Well versed in designing and developing strategic Test plans, Test Cases, Test Scripts, Test Scenarios, Defect Reports and Test Reports for both manual and automated tests. MS Visio experience in creating flowcharts and technical diagrams for applications and other documents. Good analytical skills, self-motivated, a quick learner, good communication, interpersonal and negotiation skills. Education: Bachelors - Business Administration, University of Madras, Chennai, Tamil Nadu, 1998 MS - Engineering Computer Science, 2002 (correspondence) Technical Skills: Testing Tools Testing tools - Test Director, Rational Test, Clear case Platforms Windows 98/XP/Vista, Aix, Solaris, Unix/Linux, AS/400, Dos, Novell NetWare Languages C, C++, VC++, Java, PL/SQL, VB, Basic, Perl Internet Tools HTML, XML, FrontPage, MS TCP-IP, Tomcat web server, MTS, IIS, JavaScript Databases SQL Server, Oracle, Informix, DB2/400, MS Access 2000, mongoDB, Redis Test Strategies Integration, System, Regression, Functional, Smoke, White Box, Black Box, UAT, Load, Benchmark testing and Performance testing Microsoft Tools MS Office, MS Visio, Project, PowerPoint Defect Tracking Tools Test Director, ClearCase, PVCS, Asana

$13.89 /hr
33 hours


SPEC INDIA Agency Contractor

Mobile,Web,BI,Big Data,iWATCH,Testing,Design

India - Tests: 1 - Portfolio: 129

SPEC INDIA, a ISO 9001:2008 certified company specializes in providing IT services and solutions in Java, Microsoft, Phonegap, iOS, Android, Database, Big Data & BI solutions. We have expertise in: 1. Mobile / Handheld Solutions (iWatch iOS, Android, Windows) 2. Web Applications Development & Maintenance (Java/J2EE, .NET) 3. Database Services: Database Development, Administration, Migration, Tuning, Maintenance on MS SQL Server, Oracle platforms, 4. Business Intelligence Tools: ETL, Pentaho (Kettle, CDE, Workbench), MongoDB, Hadoop, NoSQL, Jaspersoft, 5. Software Testing for third party V&V Services (Manual testing, Load & Stress testing, Automated testing, Integration & Performance testing) 6. Application Support and Maintenance (24X7 Support, SLA Based, Hourly Support, Ticket based support) 7. Cross Platform Applications (HTML5,JQuery, PhoneGap)

Associated with: SPEC INDIA

88% Job Success
$20.00 /hr
0 hours