SQL Database Administrators & Developers

Get Your SQL Project Started Today!

Hire a freelance SQL developer to add interactive functionality and flexibility to your database. Search our database of SQL consultants to get your project started today.

SQL (Structured Query Language) is a database computer language designed for accessing and manipulating databases in relational database management systems. On Upwork, the world’s largest online workplace, companies hire SQL developers to successfully complete jobs including providing support, troubleshooting and setting up/ managing databases.

Browse SQL job posts for project examples or post your job on Upwork for free!

SQL Job Cost Overview

Typical total cost of Upwork SQL projects based on completed and fixed-price jobs.

Upwork SQL Jobs Completed Quarterly

On average, 449 SQL projects are completed every quarter on Upwork.

449

Time to Complete Upwork SQL Jobs

Time needed to complete a SQL project on Upwork.

Average SQL Freelancer Feedback Score

SQL Upwork freelancers typically receive a client rating of 4.67.

4.67
Last updated: May 1, 2015
More options
Clear all filters
  1. Ivan T.

    Ivan T.

    Ruby / Rails Full-Stack Architect. 8 yrs, 12k hrs, 100pct success.

    Russia - Last active: 1 day ago - Tests: 3 - Portfolio: 1

    Independent full-stack developer / technical architect skilled in: * Ruby / Ruby on Rails (from edge to legacy) * Client-side tech (HTML5 with HAML, CSS3 with SASS, JavaScript [native & libs/frameworks], jQuery, Bootstrap, and more) * Scalable, decentralized (modular) applications architecture * Databases: relational (PostgreSQL, MySQL), NoSQL (Redis, Riak, MongoDB, Neo4j), big-data-specific (Google BigQuery, Amazon Redshift) * Background jobs processing: Sidekiq, Resque, delayed_job * Message queuing: RabbitMQ (AMQP) * RESTful APIs implementation, integration with any third-party APIs (including social media APIs: Facebook, LinkedIn, YouTube, and more), data harvesting from sites which do not provide an API * Rails applications deploy, monitoring, maintenance: Heroku, Amazon EC2, Linode, Digital Ocean) * Amazon Web Services infrastructure: EC2, S3, Glacier, Redshift,.. * Process: TDD/BDD with RSpec, Cucumber, Capybara, Zeus, Guard * Version control systems: svn, git (with GitFlow, GitHub Flow workflows) As a full-stack developer / technical architect, I can develop scalable and stable multi-node server-side applications and also can evaluate your Ruby/Rails application and make suggestions on possible optimizations / refactoring / adopting best practices. As a team lead, I can divide, prioritize and delegate tasks to developers, consult developers on best practices, ensure high overal quality of software product. I like challenges, have solid skills of problem solving, do not require supervision to successfully perform my duties. Dependability is also one of my key strenghts (never left my work half-done / half-functioning). If my current rate fits your project's budget, contact me to discuss technical and other aspects — I'm looking forward to it.

    Groups: Engine Yard Ruby on Rails Professionals Network

    $100.00 /hr
    12,939 hours
    5.00
  2. Igor P.

    Igor P.

    PHP MySQL Yii CodeIgniter Zend developer, with 7+ yrs of experience

    Russia - Last active: 15 days ago - Tests: 7 - Portfolio: 14

    I am a web application developer specializing in PHP/MySQL, with 7+ years of commercial experience. Worked with the different projects - starting from a little web-sites and web-widgets to the big web-systems and services. My main qualities are reliability, persevering and patient. Tell me your ideas, we will discuss it and I'll give you a structure of the future system and a plan of work. I think there is nothing impossible - just are necessary time, money and the desire to work!

    Groups: PayPal

    $40.00 /hr
    9,683 hours
    4.99
  3. Md abdul muqit Z.

    Md abdul muqit Z.

    GIS/Remotesensing/Photogrammetry/Maping/Area Planning/Google Maps

    Bangladesh - Last active: 1 day ago - Tests: 2 - Portfolio: 6

    Consultant and expert in GIS and Remote Sensing with particular interest in spatial analysis, Mapping with ArcGIS, Landuse planning and Landcover analysis with Erdas Imagine, Satellite Image analysis, rectification, Geo-refferencing & Mosaicing, Contour DEM preparation, GIS application development, spatial database design, and modeling. Over 8 years of experience in the field of Geo-information Science & Earth Observation related to environment, land management, telecommunication, spatial and relational database design-development-management, analysis, monitoring and planning etc. I have strong expertise in Small & Large Area, both residential and commercial, Planning by AutoCAD Map 3D and ArcGIS, also expertise on Google Maps. During my professional period I have worked for Government, Non government, Multinational, and International organizations. I have expertise in ESRI (Desktop, Multiuser Geodatabase, Server), ERDAS (Imagine with all modules), AtuoCAD Map 3D, SAP and Oracle. My prime expertise is in both Spatial and Non-Spatial Database Management System. During working with many national, international and private organizations I was involved to teach GIS and Remote Sensing courses as a part of capacity building program to the organizations like SRDI (Soil Resource Development Institute), Voovis Informatics etc.

    $34.00 /hr
    328 hours
    4.85
  4. Ruslan Ponomarenko

    Ruslan Ponomarenko

    IPhone (Objective C), Android, C# Developer, VBA, TSQL, VB ACCESS

    Ukraine - Last active: 3 days ago - Tests: 6 - Portfolio: 5

    I am experienced in development of mobile software both for iOS (iPhone, iPad, Desktop) , ANDROID . My preferred languages are Objective-C, Java, C# (.NET), PHP. This allows me to participate successfully in cross platform projects, including network services and GUI applications. I mostly work under development of iOS Mobile applications at the moment but my experience includes development of ANDROID applications (Java) and Desktop applications (C#, Cocoa), Web Applications (PHP, C# Asp.NET). My programming experience will enable me to fulfill your task successfully and quickly enough!

    $36.67 /hr
    4,922 hours
    4.84
  5. Federico F.

    Federico F.

    .Net software developer

    Argentina - Last active: 1 day ago - Tests: 8 - Portfolio: 3

    Interested in creating software systems meeting your needs. With exceptional skills on Microsoft Technologies especially on .NET platform and Angular.js with years of good working relationship with onshore and offshore clients. My goal is to help you not only by implementing what you require of me, but also by providing advice, guidance, and best practices based on my wide experience

    $33.33 /hr
    770 hours
    5.00
  6. Alexander Solovyov

    Alexander Solovyov

    Senior Full Stack Web Developer (ZF2, Node, Angular, Backbone)

    Russia - Last active: 1 day ago - Tests: 3 - Portfolio: 3

    Passionate developer of PHP, SQL (MySQL), NoSQL (MongoDB), JS seeking for challenging projects on the edge of technology. General knowledge: 1) PHP + Zend Framework 2 + Doctrine ODM/ORM + Apigility (REST). 5+ 2) Native Javascript (prototypes and ...). 5+ 3) JS framework Marionette js with Require JS and jQuery. 2+ 4) Node js (+ scappers Casper JS and Phantom JS) 2+ 5) Knowledge of HTTP protocol + experience with REST + SOAP. 5+ 6) MySQL. 5+ 7) MongoDB. 3+ 8) Experience with BigData (e.x. classification Bayes) and software (Google Bigquery, Hadoop and R lang) 2+ 8) Experience of implementation OTA (Open Travel) standard. 1+ 9) Linux (Debian, Ubuntu and others) 5+ 10) HTML5 / CSS3. 5+ Passive knowledge: 1) Java + Hibernate 1+ 2) C/C++ 1+ 3) Unix (Solaris) 1+

    $44.44 /hr
    1,148 hours
    5.00
  7. Sergiy R.

    Sergiy R.

    Linux System Administrator

    Ukraine - Last active: 1 day ago - Tests: 9

    I am an experienced System Administrator with a wide range of skills, including Linux servers administration, LAMP stack setup, OpenVZ and KVM virtualization, configuring services, working with version control systems and writing system maintenance scripts. I have a hands-on experience with Linux, including Ubuntu, CentOS, Red Hat, Gentoo and Debian distributions. I am able to code in OCaml, C, C++, Ruby (including Ruby on Rails), Bash/Zsh and read Java, Python, Haskell, Perl and Common Lisp programs. My most important virtues are: extreme responsibility, easy communication and attention to details.

    $40.00 /hr
    457 hours
    5.00
  8. Ilija S.

    Ilija S.

    data scientist

    Serbia - Last active: 2 days ago - Tests: 2

    Learn through data analysis, would be the tag line for me. I am a data scientist with business intelligence and text analysis background. I am also a JAVA/php/javascript developer, like databases, have a PhD (if important). Strong incentive to build systems that analyse and learn from data. I've done this for the last 8 years in academia and industry, and will try to do it for a long time (still only 30).

    $38.89 /hr
    299 hours
    4.99
  9. Hector Bravo

    Hector Bravo

    IT Expert - Project Manager - PMP, ITIL, VCP, MCSE, MCDBA, VoIP

    Panama - Last active: 27 days ago - Tests: 13

    Design, Plan, Implement and Support for: - Windows Azure / Amazon EC2 - Microsoft Lync - Microsoft Sharepoint - Microsoft Exchange - Microsoft SQL Server - Microsoft Active Directory, ADFS - Microsoft Dynamics CRM - Windows Server / Hyper-V - Microsoft ISA/TMG/UAG - Microsoft SSCM, SCVMM, DPM - Microsoft Office 365 - Voice Integration with Lync - VMWare vSphere / ESXi - VMWare Site Recovery Manager (SRM) - Veeam Backup & Replication

    Groups: Microsoft Certified Professionals

    $33.33 /hr
    930 hours
    4.56
  10. Craig Tarr

    Craig Tarr

    Digital Strategy & Interactive Applications Leader

    United States - Last active: 3 days ago - Tests: 2

    Web, mobile, app, social and analytic leader.I have been helping public & private businesses and government since 1995. My skills range from interactive design, strategy, creation and support. I have hands on experience building strategy for UX/UI, SEO/SEM, streaming, usability, A/B testing and I have industry experience with WCAG 2.0 ADA web compliance, SOX and PCI requirements and application / server hardening for security compliance. I have extensive development knowledge in Microsoft technologies including Office, SQL Server, C#, VB, Sharepoint, IIS. I have worked with the languages of JavaScript, ColdFusion, Perl and more. I have managed applications that generate thousands of dollars in sales a day. Handle thousands of users an hour and utilize Content Delivery Networks including Amazon AWS, Akamai and MirrorImage. I am a self starter who can get a job complete. I can also lead a team of developers, designers and marketers through the complete life cycle.

    $74.00 /hr
    0 hours
    5.00