SQL Database Administrators & Developers

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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.

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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
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  1. Preston H.

    Preston H.

    20+ years expert SQL database designer preferring MySQL and PHP.

    United States - Last active: 13 hours ago - Tests: 48 - Portfolio: 4

    I am one of the top database design specialists on Upwork. My sophisticated hand-crafted database design will save your organization significant time and money. I am a serious professional with over 20 years of experience as a programmer and database specialist. My emphasis has been on creating elegant SQL database design integrated with user-friendly front-end software (desktop and web applications). I have worked mainly as a database designer, programmer and database administrator for bioinformatics, biochemistry, molecular biology, and biomedical research applications. I also have extensive experience programming database-centric software (websites, web applications, desktop applications) for publishing, business, financial, personnel and other purposes. One of the things I enjoy most is creating database schemas which make sense for both programmers and non-programmers, designing with an eye toward flawless data integrity, maximum maintainability and optimal performance. I love crafting websites and web applications which perform with shocking speed. It makes for a better experience for users, developers and administrators. My expertly designed database systems - with well-written queries, intelligently chosen indices, and sensible caching strategies - can easily perform 10 to 100 times faster (using the same underlying hardware). My emphasis when working with clients is on their data and system usability, not specific trends or technologies. But in case you're wondering about some specifics, I strongly believe that the database data should be integrated with but also somewhat independent from a presentation/application layer. Data in the database should be easily accessible from one or many different applications built using one or multiple different technologies. Currently I favor PHP/JavaScript/HTML5 for web applications, RealBasic/Real Studio/Xojo for cross-platform applications [Mac OS X/Windows/Linux], Xcode for Mac OS X-only/iOS applications, Visual Studio for Windows desktop applications. I prefer using MySQL for back-end RDBMS, but I also use Oracle, Microsoft MS SQL Server, PostgreSQL and SQLite on a regular basis. If your data and information organization is already in great shape, and if you are satisfied with how your database-integrated software and website performs, then you probably don't need a high-end expert like me. I can make routine modifications, add to well-crafted existing systems, etc. But so can many other people. But if you're just getting started on a new system that you want done right, or if you suspect your database website programming strategy needs an overhaul, then I can get you on the right track in a short amount of time. * * * * * * * * Let me mention a few of the client-friendly policies and practices I apply with all my clients. I don't do these things to distinguish myself from other contractors. (I would hope they all do the same.) I do these simply because this is how I would want to be treated if I was the client: - You don't need to have your own web servers; I can host development and/or live production work on my own high-capacity servers. - I don't mind working on a client's servers, or doing dev work on my servers and transfering finished work to client's servers. - I do not charge clients any fees for hosting their websites or software systems, or for moving their websites or software systems elsewhere. - I provide clients with root log-in access to all the work I do for them; you are welcome to log into the server (cPanel, FTP, and phpMyAdmin) at any time and copy or back-up or move any work I do for you. - If I am working for you, all work product, all source code, all database design belongs to you. Always. Period. - I am happy to work with you and/or other programmers you enlist to work on a project; I am happy to pass off development work. - I do not provide mysterious "black box" solutions. I am happy to have you look under the hood at everything I do. You don't need to know anything at all about the inner workings of a system. Or you're welcome to ask about the most intricate details. - If we're developing a system from scratch, I prefer to do so using very widely-available technologies (PHP/MySQL/JavaScript/HTML5) which you can hire countless other people to work on if you decide to have other developers work on your system. - Do not be embarrassed to ask ANY question! I enjoy working with clients who have zero technical know-how in programming/databases/etc., partially because I appreciate their expertise in OTHER fields (real estate, art, medicine, law, science, civics, etc.) If you already know everything about databases and programming you probably wouldn't need me, would you?

    $82.00 /hr
    466 hours
    4.99
  2. Aliaksei B.

    Aliaksei B.

    Senior Software Developer(ASP.NET/MVC/WebAPI/Javascript/Sql)

    Belarus - Last active: 4 days ago - Tests: 4 - Portfolio: 4

    I am an experienced solution architect and passionate developer with more than 7 years of .NET development experience of Enterprise-level B2B and B2C applications development including web, mobile and desktop. I'm happy to provide you a safe pair of hands to develop and deliver a product of any complexity. My usual roles: Senior Software Developer, Architect, Team Lead. My primary skills are: ASP.NET MVC, WEB API, RabbitMQ, Wcf, ORM(NHibernate, Entity framework), IoC(Spring.Net,Ninject, SimpleInjector), SignalR Solr, ElasticSearch, Couchbase, Redis,Sql/T-Sql, Mongo HTML5/CSS/Javascript, twitter bootstrap,backbone.js, jquery,node.js, phonegap,sencha touch,jquery mobile Also I'm very interested and have some experience in such great stuff as: hadoop, kafka, apache spark, zookeeper

    $33.33 /hr
    644 hours
    5.00
  3. Andrii Andriichuk

    Andrii Andriichuk Agency Contractor

    Software Engineer (.NET; WEB; SOA; WCF; SQL Server; Delphi)

    Ukraine - Last active: 13 hours ago - Tests: 4 - Portfolio: 14

    I am a professional software developer. I work in this field for more than ten years. During my career I developed a set of desktop and web applications. At the moment I completed a major project and for that reason I am looking for work new project. I will be glad to start to work with you. I am able design and implement such things as architecture, security, data access layer, db structure, bussiness layer, caching and much more. Also I have good experience in SOA. WCF SOAP an d WCF REST I can work with both without any problems. Please contact me if you need any help of experienced programmer.

    Groups: Central Desktop, Twilio

    Associated with: DYNAMIC DEVS

    $50.00 /hr
    4,086 hours
    4.89
  4. Vitaliy Zhukov

    Vitaliy Zhukov Agency Contractor

    Professional .NET developer ASP.NET, MVC, Azure, SQL, JavaScript

    Russia - Last active: 13 hours ago - Tests: 17 - Portfolio: 10

    Vitaliy is one of the most talented developers we have. His expertise are .NET related technologies and JavaScript but this doesn't mean that he is not able to be the best in other areas. He likes to improve his own skills working on different projects and learn something new.It doesn't matter if it's a new technology or an API, you can be sure that he adapts to any new stuff very quickly and deliver his tasks in time. He is also a perfect team player, maybe because he likes team sports :)

    Associated with: Intspirit

    $35.00 /hr
    6,441 hours
    4.96
  5. Richard Morrison

    Richard Morrison Agency Contractor

    MS SQL DBA Optimization, Clustering, Mirroring, Replication, TSQL

    United Kingdom - Last active: 28 days ago - Tests: 4

    Certified Database Administrator with over 10 years experience working with SQL Server 2012, 2008, 2005, 2000, 7.0 and 6.5. My proven skillset, has enabled me to work alongside and provide consultancy to Architecture and Development teams. My objective is to use my experience to bring creative and robust solutions to businesses that requires a SQL Server Database Administrator/Developer. Skillset - Windows and SQL Server Clustering, TSQL, DTS, SSIS (ETL), SSRS, Performance Tuning/Optimization & Transactional ReplicationI also have 'real world' experience implementing backup, maintenance and disaster recovery strategies across multiple data centres.

    Associated with: DBTECH SOLUTIONS

    $50.00 /hr
    2,448 hours
    5.00
  6. Azwaan A.

    Azwaan A. Agency Contractor

    Senior Developer/Solution Architect (C#, .NET, MVC, AZURE, SQL)

    Sri Lanka - Last active: 1 month ago - Tests: 7 - Portfolio: 9

    An Accomplished Software architect, consultant and Lead Developer, with in-depth expertise on Desktop, Web, Cloud and Enterprise applications on the .NET platform as well as strong ETL and Business intelligence expertise on the SQL Platform. Highlights 13 yrs of experience in the Industry. More than 20,000 Hrs of development work. more than a Dozen certifications (MCPD, MCITP, MCTS) on various .NET and SQL Server related technologies. I write clean code, Follow SOLID principles in development, designed to to develop manageable, extensible and reusable systems Co-Founded a US Based startup Available to work on US EST work hrs Expertise on requirements analysis , estimation to Architecting solutions and leading teams on complex development projects to review and performance tune existing applications. In-depth knowledge and familiarity of developing applications for a number of industry domains such as Financial services, Energy, Lead Processing, Automobile, Telecom billing, Consumer goods and Manufacturing. Extensive experience in enterprise software development life-cycle. Agile and Scrum/XP Methodologies in managing project teams. Key Achievements Architected, Managed and led development effort to build a complete eco-system for automobile lead processing, lead delivery, inventory management and digital advertising. Founded a Microsoft technology consulting and outsourced product development firm, leading its product delivery team and delivered multiple solutions in different industry verticals. Led improvements to existing development processes using best practices, guidelines and process re-engineering on multiple engagements. Multiple successful consulting and delivery engagements turning around troubled existing systems into revenue generating applications that can be scaled to meet customer demand. Was part of team that built the world’s first Online AGM solution. Web Technologies ASP.NET MVC (2.0 to 5.0), ASP.NET Forms, HTML5/CSS3, WCF Web Services , .NET 2.0 Web Services, SOAP/JSON/AJAX/REST, JQuery, ODATA, Knockout JS Windows Applications Windows Forms, WPF, Silverlight Frameworks .NET Framework (2.0 to 4.5), Telerik Kendo UI, Windows Azure (Cloud), Amazon SDK Software Design/Architecture Patterns GRASP, GOF, MVC, MVP, SOLID, DRY, KISS, YAGNI, Domain Driven Design(DDD), CQRS Databases/Database Technologies SQL Server (2005 – 2012), SQL Integration Services, SQL Reporting Services, Geo-Spatial Data, MongoDB, LINQ, Entity Framework, SQL Azure Middleware MSMQ, Windows Workflow Foundation, NServiceBus, SQL Service Broker Development Process Methodologies Agile, Scrum/XP, Prince 2, TDD, DDD , BDD, Continous Integration (CI) Tools Jetbrains Teamcity, 3Scale API, JetBrains DotTrace, YSlow Payment Technologies PayPal, Chase Payment Tech, Speedly, BrainTree, PayPros

    Associated with: Inexis Consulting

    $33.33 /hr
    2,781 hours
    4.92
  7. Stas Davydov

    Stas Davydov Agency Contractor

    [PRO] Web development PHP, JavaScript, HTML, CSS, Java, Python, SQL

    Russia - Last active: 9 days ago - Tests: 16 - Portfolio: 19

    I know how to develop software with good quality in short time. The best project lifecycle under my development is: 1) Fast prototyping from UX scenarios and wire-frames. 2) Implementing functional and unit-tests for front-end and back-end. 3) Development phase with continuous integration and fast iterations. 4) Production. I specialized on web sites and web applications with complex structure and back end. Also I'm familiar with usability and like to develop clean and light user interfaces. For web development I usualy use PHP or Python + Ajax (jQuery). This's the simplest and fastest solution for most web applications. I've big experience in development of very different applications from small innovative web 2.0 services to complex client/server applications (like SirsiDynix Horizon - an application for library workflow management). My another expertise is Java, I use it since 2000 for numerous projects. I always pay the most attention to customer needs. And I can study faster when need to work with framework/technology I never worked before. Please, visit my portfolio website for more information about me: http://stasdavydov.com/ Thanks!

    Groups: Application Developers Alliance

    Associated with: Outcorp

    $38.89 /hr
    847 hours
    4.78
  8. Oleg M.

    Oleg M.

    Manager/Architect/Developer, Java, SQL, JavaScript, HTML, CSS

    Russia - Last active: 12/23/2014 - Tests: 1 - Portfolio: 13

    Development of web and client-server applications using object oriented and aspect oriented technologies. I would like to work in the following areas: * Web Development of E-Business / Database Applications * Software Engineering Experience Summary: 8+ years experience in the information technology industry with expertise in architecture, analysis, design and development. • Java (J2EE, Spring, Hibernate, JSP, JSF, JSTL), PHP • SQL, MsSql (T-SQL), MySQL, PostgreSQL, Oracle10 • JavaScript (Ext-JS, JQuery, Prototype, Mojo), CSS, HTML, DHTML • XML, XSLT, XPath, XStream • Web Services, wsdl • JReport, IReport • Maven, Ant, JUnit • Tomcat, JBoss • IntellJ, Eclipse • Shell Programming • Window 98/2000/XP/Vista/Seven, Red Hat Linux, Debian, Ubuntu, CentOS. I have the ability to manage projects, ability to work within tight deadlines, ability to work with new technologies and ability to fast learn, team player.

    $33.33 /hr
    5,987 hours
    5.00
  9. Mike De La Loza

    Mike De La Loza

    Rails/Ruby/Python/C++/SQL/Ajax/Javascript/Backbone.js/CSS

    United States - Last active: 13 hours ago - Tests: 4 - Portfolio: 11

    Since deciding to work alone in 2010, I have never abandoned a client. I don't give estimates nor abide by deadlines. My development machine has 32GB of RAM, a 500GB SSD hard drive, two 23-inch monitors, and a Logitech webcam.

    $70.00 /hr
    5,027 hours
    4.83
  10. Jorge raul S.

    Jorge raul S. Agency Contractor

    Senior Programmer Visual Basic,VBA,Excel,Access,SQL,Essbase,Mainframe

    Argentina - Last active: 1 day ago - Tests: 2 - Portfolio: 12

    My Degree: More than 15 years of experience working for 1st level enterprises. My Speciality: Solve problems. My Proof: See my oDesk work history and feedback

    Groups: Yahoo Web Hosting Designer

    Associated with: Hipnotika Agency

    $38.89 /hr
    8,860 hours
    5.00