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SQL is one of the most important programming languages when it comes to managing data in general, and is indispensable to countless companies and corporations.
SQL is a programming language that can help you manage your data more efficiently. Find an SQL architect to help you do just that at Freelancer.com!

8.2
8.2
99%

Port Alfred, South Africa
$35 USD per hour
I've worked on graphics visualization software for manufacturing industry. Applications for the 3 dimensional visualization of components and robotic control routines and simulations using C/C++, Visual Basic and Power Basic. I have created simulation applications for CNC milling machines. These are machines that use a tool to modify a rectangular or cylindrical piece of material to create components, moulds...etc. I've also worked on modifying the graphics and AI of a virtual reality and 3D game engine and the creation of MRI (Magnetic Resonance Imaging) software of the kind that's used for medical imaging. Other work includes Distributed systems, O.C.R.(Optical Character Recognition) - transforming images of paper documents into useful digital data. My experience includes around 17 years of commercial experience after getting a Master's Degree in Computer Science (1'st class pass >75%). C/C++ coding, javascript, HTML5, OpenGL, WebGL, three.js and a lot of other technologies.

6.4
6.4
89%

Briza, South Africa
$45 USD per hour
Experienced software developer and solutions architect with skills across a large range of technologies. Also highly skilled in B2B and B2C marketing, including strategy, SEO & PPC. Areas of expertise include C, C++, Objective C, C#, Java, Erlang, VB, ASP, ASP.NET, Perl, Python, PHP, Android, iOS, Xamarin/MAUI, React, Rust and Node.js. Primary Skills: - Software development (Web, Mobile, Desktop & Server) - Game development - Solutions architecture - Cloud services (Amazon Web Services, Azure, Alibaba Cloud) - Systems design - System administration - Search engine optimization Additional Capabilities: - Photo & video editing - Translation & transcription - Audio production - Marketing Certifications: - AWS Solutions Architect Associate - Microsoft Certified Technology Specialist - Google Ads Search Certification Software Experience: C++, C, C#, ASP, ASP.NET, Blazor, Java, PHP, Erlang/OTP, Visual Basic, Delphi & Kylix, Perl, Pascal & Assembler (x86 & PPC), Windows, macOS, Linux, Minix (x86 & PPC), DOS, CP/M, FreeBSD, NetBSD & OpenBSD, AT&T System V, Solaris (Intel & SPARC) Java, GCC, HTML, CSS, Wireless Markup Language, JavaScript, VBScript, AJAX, Asterisk & AGI, WordPress, Laravel, Joomla, Moodle, Unreal Engine, ejabberd, PostgreSQL, MySQL, MSSQL, Oracle, Amazon Aurora & DynamoDB Academic Background: BSc Major Computing Information Systems / Minor Game Programming Level 6 Diploma in Marketing Languages: English, Dutch, Afrikaans, French

7.0
7.0
95%

Cape Town, South Africa
$5 USD per hour
I'm a seasoned freelancer with over 15 years of experience on Freelancer, having successfully completed more than 300 projects for clients all around the world. My main focus is on WordPress, where I can help with everything from website management and development to creating custom applications and websites. I hold certifications from well-known institutions like Google, Sigma, PMEC, Udemy, Hubspot, LinkedIn, and Microsoft. I'm also an AmoCRM Partner and a member of the Amazon Consumer Council, Amnesty International, and the Democratic Alliance. Originally from Europe, I've been living the digital nomad lifestyle for the past 15 years, working remotely and exploring the globe. I love learning new things and have a strong desire to help others. In my professional journey, I've worked as a Certified Manager (Chief Technology Officer) for over 5 years and spent another 7+ years in corporate roles as a Certified Software Engineer. I specialize in complex product design and development, managing projects from start to finish, and coordinating with various teams and stakeholders. On the technical side, I'm a Certified Development Manager with over 15 years of experience, particularly skilled in MEAN.js, WAMP.net (C#), and LAMP.php stacks. I follow Agile, CC, S.O.L.I.D, DRY, and TDD methodologies to ensure top-notch results. I've received glowing references from employers like Handy Cats, Property24, Naked Snacks, Naspers Limited, Korbitec, and Jago. I've also been praised by notable individuals such as the Director of BGIS, the President of Rock Hammer, the Project Manager for Philips, the Director of Jago, Allan Gray, and the Tech Lead for Property24 (Auto Trader). My quest for knowledge has led me to earn certifications from institutions like Six Sigma (CSSC), eBSI Academy, Google Academy, LinkedIn Academy, BitDegree, Harvard University, Kiron, eBSI Export Academy, Damelin, and Waldorf Michael Oak. My skills are highly endorsed in areas like ASP.NET, C#, PHP, JavaScript, Software Development, Agile Methodologies, Graphic Design, Web Services, Scrum, and SQL!

4.8
4.8
94%

Stellenbosch, South Africa
$30 USD per hour
We help businesses grow through websites, automation, marketing, and technology solutions that drive measurable results. Our focus is on creating scalable systems, improving online visibility, increasing conversions, and streamlining operations to support long-term growth. Our expertise includes: ✅ Website Development ✅ UI/UX Design ✅ WordPress & Shopify ✅ SEO & Digital Marketing ✅ Google & Meta Ads ✅ AI & Automation Systems ✅ API Integrations ✅ ChatGPT & AI Solutions ✅ Branding & Graphic Design ✅ Analytics & Business Insights We combine strategy, creativity, and technical expertise to deliver high-quality solutions that help businesses operate more efficiently and grow faster. Our team is committed to clear communication, reliable delivery, and building long-term partnerships with every client we work with. portfolio-https://dreamsitex.com/

5.8
5.8
96%

Cape town, South Africa
$25 USD per hour
We area results-driven professional Team, passionate about web design, AI integration, e-commerce, programming, marketing, and networking. My Team and I are dedicated and committed to deliver innovative and efficient solutions tailored to clients' needs. Top Skills and Strengths: ✅ Web Design : Creating responsive, user-friendly websites using WordPress, Elementor, & Tailwind CSS. ✅ Game Development: Design immersive 2D/3D using industry-std engines and interactive scripting. ✅ AI Integration: We enhance business operations, streamline processes, & improve user experiences. ✅ E-commerce: Set up,customizing WooCommerce ,Shopify for optimized product management & sales. ✅ Programming Expertise: Developing data-driven applications using HTML, CSS, JavaScript, and Python. ✅ Marketing & Lead Generation: Crafting strategies to boost engagement,conversions, CRM solutions. ✅ Networking & IT Solutions: Managing and optimizing IT infrastructures for seamless connectivity.

3.7
3.7
100%

Johannesburg, South Africa
$30 USD per hour
I'm very passionate about all what's related to computers, specially when it comes to programming and web design. When it comes to web design, I can help you in these fields: HTML PHP MySQL WordPress Javascript (+jQuery) CSS **************************************** I can also assist you if you need help with: Microsoft Excel, Microsoft Word, Microsoft Access ****************************************

5.1
5.1
100%

Cape Town, South Africa
$50 USD per hour
I have been designing databases using Microsoft Access, SQL, VB and VBA for the past 20 years. In addition, I am a certified Microsoft MOS instructor and teach all levels of the Microsoft office, specialising in advanced Excel, Access and VBA training. I have also written many technical and user training manuals to accompany both the software that I have designed and the training courses that I teache - my Access VBA manual is a step-by-step manual that can be used from the comfort of your own home where help is just an email away.

4.0
4.0
92%

Douglasdale, South Africa
$50 USD per hour
Senior PHP developer, systems architect, and technical lead with 20+ years of experience building and improving business-critical software. Strong background in PHP, MySQL/MariaDB, PostgreSQL, Linux, Apache, back-end architecture, performance tuning, and workflow-driven systems. I specialize in custom business platforms, legacy system upgrades, database-heavy applications, technical problem-solving, and turning complex operational requirements into stable, maintainable solutions.

4.9
4.9
92%

Struisbaai, South Africa
$15 USD per hour
We're full-stack developers with deep experience in web, mobile, and AI solutions. From WordPress and Shopify builds to custom APIs, automation bots, chatbots, and secure web apps, We deliver fast, scalable, and cleanly architected systems. Skilled in PHP, Python, JavaScript, C/C++, Node.js, React, Vue, SQL, and more. We turn complex ideas into reliable, high-performance products. ✅Custom WordPress & Shopify development ✅Full-stack web app development (React, Vue, Node.js) ✅AI chatbot development (OpenAI, custom NLP) ✅Automation bots & web scraping tools ✅Website optimization, SEO & analytics setup ✅Secure backend APIs & data-driven dashboards ✅Salesforce & custom app integrations ✅Mobile app development (native & hybrid) ✅Testing, security audits & bug fixing Let’s turn your idea into reality efficiently, creatively, and professionally.
A SQL developer is a database specialist who designs, writes, and optimizes Structured Query Language code to store, retrieve, and manage data inside relational database systems. SQL developers build the queries, stored procedures, views, triggers, and schemas that power applications, reporting tools, and analytics pipelines across virtually every data-driven business.
Hiring a freelance SQL developer gives you direct access to the engineer who will turn raw business requirements into reliable, performant database code. The work goes far beyond writing SELECT statements. A skilled SQL developer designs normalized schemas, enforces referential integrity, tunes slow queries, and ensures that the data layer keeps pace with application growth.
Commercially, this matters because the database is usually the bottleneck. Slow queries cost conversions, broken reports cost decisions, and poorly designed schemas cost months of refactoring. A competent SQL expert prevents those costs and turns data into a strategic asset.
SQL development covers a broad set of tasks. Most freelance engagements include some combination of the following:
A strong SQL consultant is fluent across multiple relational engines and the surrounding ecosystem. Common platforms and tools include:
Almost every sector that handles structured data benefits from SQL expertise. Typical use cases include:
The strongest SQL specialists combine theoretical database knowledge with hands-on experience optimizing real workloads. When reviewing candidates, look for portfolios that include schema designs, before-and-after query tuning examples, and migration case studies. Vendor certifications such as Microsoft Certified: Azure Database Administrator Associate, Oracle Database SQL Certified Associate, or PostgreSQL Associate Certification are useful credibility signals, though practical experience usually carries more weight.
Ask candidates to walk through a query they optimized and explain the reasoning. The ability to read execution plans, identify index opportunities, and justify schema decisions separates senior database developers from junior ones.
Sample interview questions you can use directly:
Freelancer.com gives you access to a global pool of database engineers covering every major SQL dialect, cloud platform, and industry vertical. Whether you need a short engagement to fix a slow report or a long-term database architect to design a new data warehouse, you can post a project on Freelancer.com and receive competitive bids within hours.
Profiles on Freelancer.com include verified ratings, completion rates, portfolios, and client reviews, so you can shortlist confidently. Milestone Payments hold funds securely and only release them when you approve the work, giving both sides a clear, protected workflow. The scale and diversity of freelancers on Freelancer.com means you can match technical specialty, time zone, and budget to your exact project.
Hiring a SQL developer is straightforward when you describe the database environment and the outcome you need. The clearer your brief, the more accurate the bids will be. The process below walks through how to post your project, evaluate proposals, and award the work with confidence.
The project post is the single biggest determinant of bid quality. A precise brief filters for SQL developers whose dialect, tooling, and domain experience genuinely match your work. Head to the
Bids are short proposals that reveal how each SQL developer interprets the brief. Read them carefully. A strong proposal will reference your specific database engine, suggest a likely cause for performance issues you described, and outline a realistic plan rather than a generic pitch.
Final selection should combine proposal quality with profile evidence. For database work, look for consistency across multiple completed projects rather than a single impressive example. Pay close attention to written reviews that mention performance gains, on-time delivery, and clean documentation.
Simple work such as writing a set of stored procedures or tuning a handful of queries can be completed in a few days. Larger engagements like full schema redesigns, data migrations, or building a reporting back-end usually take several weeks. Timelines depend on data volume, the number of integrations, and how clean the existing database is.
A SQL developer focuses on writing and optimizing queries, stored procedures, and schemas that support applications and reporting. A database administrator focuses on the running database itself, including backups, replication, security, patching, and uptime. Many freelancers cover both, but for complex production environments you may want one of each.
Yes. Short, scoped engagements such as fixing a slow query, writing a specific stored procedure, or building a one-time data export are common on Freelancer.com. Provide the schema, sample data, and current execution plan in your brief so the freelancer can quote accurately.
Choose a SQL developer when the work centers on relational database design, query writing, and procedural logic inside engines like SQL Server, PostgreSQL, or Oracle. Choose a data engineer when the project requires building large-scale pipelines across distributed systems, streaming data, and tools like Spark or Kafka. Many freelancers carry both skill sets, so describe the workload clearly in your brief.
Generally no, at least not initially. Provide a sanitized copy, a staging environment, or an anonymized data sample so the freelancer can develop and test safely. Production access can be granted later under proper credentials and with version-controlled deployment scripts.

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