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Mohammad S.

4.9

150

6.0

96%

Melbourne, Australia

$30 USD per hour

Welcome !!! I have over 10+ years experience in web development. 1. I can manage your project from scratch to publish. . 2. I will be always online to communicate anytime you want. 3. I love long-term relationship and will update your project whenever you want. 4. Best Quality Assured 5. Modern Touch and Responsive websites. Area of experise: ✔ Website Development ✔ Laravel ✔ Vue JS ✔ Amazon Web Services ✔ VPS ✔ Wordpress Development ✔ PSD to HTML ✔ PHP ✔ WooCommerce ✔ Magento ✔ HTML5/CSS3 ✔ AJAX, Jquery ✔ Web Hosting and Security. ✔ Facebook App Development ✔ Google Maps and API Cheers, Sarfaraz

SQL PHP JavaScript Script Install Website Design

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The Hawkesbury Geek

5.0

138

8.1

99%

Kurrajong, Australia

$35 USD per hour

G'day! I'm Brett, a full-stack developer with 20+ years of hands-on experience in website design, development, mobile & desktop app development, hosting, AI-driven automation, and advanced Excel-based data and financial solutions. I went through all levels of verification by Freelancer staff providing you with reassurance that I am one of the top developers on Freelancer. I build reliable, scalable websites and applications, and I help businesses use AI in a practical way — automating repetitive work, improving customer experience, and making systems smarter without unnecessary complexity. My core tech stack includes PHP, JavaScript, Python, C/C#, and Java, along with modern frameworks, AI, APIs, and industry-standard tools. What I Do 1. Website Design Figma, PSD, and Adobe XD to Responsive Layouts using CSS, Bootstrap, Tailwind CSS 2. WordPress - Custom themes & plugins - ACF, Gutenberg, Elementor, Divi, Beaver Builder, Oxygen, WPBakery - Advanced custom forms (Gravity Forms, WPForms, Contact Form 7) 3. Website & Application Development 3.1 Next.js & Modern Web Apps - Next.js websites and applications - Server-side rendering (SSR) & API integrations - Secure, scalable architecture 3.2 Front-End - HTML, CSS, JavaScript, jQuery - React.js, Angular, Vue.js, MUI - Bootstrap, Tailwind CSS 3.3 Back-End - Node.js (Express) - PHP (Laravel, Symfony, CodeIgniter, Yii, Zend) - Python (Django, Flask, FastAPI) - C# (.NET, .NET Core) 3.4 Full-Stack - MERN & MEAN stacks - Secure APIs, authentication & integrations 4. AI & Automation - AI chatbots and assistants for websites & internal tools - OpenAI / LLM integrations (chat, content, data processing) - Smart search, filtering & AI-powered features 5. E-commerce - WooCommerce, Shopify, Magento, Prestashop, OpenCart - Custom features, integrations & performance optimisation 6. Mobile App Development (Flutter & React Native) - Cross-platform mobile app development for iOS and Android - API integration (REST, GraphQL, Firebase, etc.) - Push notifications, authentication, payments & third-party services 7. Desktop Application Development (Electron) - Cross-platform desktop apps for Windows, macOS, and Linux using Electron - Building modern, responsive desktop UI using HTML, CSS, JavaScript, React, and Node.js - API integrations for cloud-connected desktop tools 8. Excel & Finance Automation - Advanced Excel solutions (formulas, pivot tables, dashboards) - Financial modelling, forecasting & reporting tools - Data cleaning, transformation & analysis - Automation using Excel, Google Sheets & scripts (VBA / Python) - Integration with APIs, CRMs, and business systems for real-time reporting 9. Hosting & Deployment - Hosting setup, optimisation & security - Ongoing maintenance and support I'm online pretty much 24x7 so you're never going to wait long for an answer. I'm easy to chat to and extremely keen to achieve a 5/5 result for both sides, get in touch.

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Neeraj G.

4.9

6.0

92%

Sydney, Australia

$50 USD per hour

We are an Information Technology solutions and services provider that caters to clients all over the world. We are a total solution provider in company branding and online services. Our team has delivered a number of online stores to businesses using platforms like magento, shopify etc. Our Business Intelligence and Datawarehousing team comprises of professionals certified in Azure, PowerBI, Informatica , OBIEE , PMP , Cognos , Collibra, Snowflake, Teradata FSLDM and in almost every BI and DWH technology. We have conducted corporate trainings for firms like Wipro, L&T Infotech etc. on Teradata FSLDM and ETL tools like Informatica. We have also served NYSE listed firms like Bare Escentuals on their Data Warehousing projects.

SQL Data Processing Excel Photoshop WordPress

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Tony S.

5.0

6.1

99%

melbourne, Australia

$30 USD per hour

I am a hard-working and enthusiastic .NET Developer and Adobe Flash Designer. I have gained an extensive experience in the areas of .NET and Adobe Flash through working for many global employers. I also have great experience working as a AJAX Developer and ASP Developer throughout my career. I also have great experience and a thorough understanding of C Programming. I can work along well and do my best part to bring a good name for your company.

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Alexander M.

4.8

7.3

96%

Hectorville, Australia

$50 USD per hour

Thanks for stopping by my Profile! I am a well-qualified FullStack Engineer familiar with wide range of programming utilities and languages. Knowledgeable of backend and frontend development requirements. Handles any part of the process with ease. Collaborative team player with excellent technical abilities offering 10 years of related experience. - Programming Languages : JavaScript, C#, Java, Python, CSS, HTML5, HTML6, C++, TypeScript - Frontend React, Redux, React Native, Angular, Vue.js, Flutter, Jquery, Ember.js,Shopify - Backend Node.js, Django, Express.js, ASP.NET, Ruby on Rails, Laravel - DevOps & System Amazon Web Service, Azure, Linux System Administration - Database MongoDB, MySQL, MariaDB, PostgreSQL, Oracle, SQL Server, Redis, Firebase - Security Cyber Security, System security - OpenAI Building ChatBot using OpenAI models, Fine Tuning, Training Dataset, Voice Chatting - Cryptocurrency Blockchain,cryptocurrency development and integration As you can see, I am well adept at working with all the relevant platforms, and if you’re interested in getting an idea of how I work and what I create, feel free to reach out via Freelancer! I'm always available through message and am happy to give free consultations and proposals for all new and returning clients!

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Junilo P.

5.0

6.4

99%

Peakhurst, Australia

$100 USD per hour

I’m a Senior Full Stack Software Engineer originally from the Philippines, now proudly based in Sydney, Australia, with over 20 years of experience in the IT industry. I specialize in crafting tailored web applications and cloud-based solutions that help clients bring their ideas to life — from frontend design to backend architecture, all the way to deployment and ongoing support. My technology stack includes: Frontend: HTML5, CSS, jQuery, Bootstrap, Vue.js/Nuxt.js, ag-Grid, Integration with Google Maps and other APIs Backend: PHP, MySQL, C# (.NET 3.1 to .NET 9), SQL Server Realtime & Data Viz: WebSockets, MQTT, D3.js Cloud & DevOps: Full Microsoft Azure Stack (App Services, Functions, Storage, DevOps, etc.) I’m passionate about building scalable, user-friendly systems and leveraging the power of the cloud to deliver modern, reliable, and high-performance software solutions. Let’s work together to turn your ideas into powerful applications that grow with your business.

SQL PHP JavaScript .NET System Admin

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Md A.

5.0

5.5

99%

Mount Druitt, Australia

$20 USD per hour

Overview: • With 10+ years of experience in developing/ updating/maintaining application developed in PHP/Laravel/Wordpress/Yii and managing MySQL/MS-SQL Database • Strong hold on Object Oriented Design concept and design patterns Area of Expertise : • PHP5/PHP7,Laravel 4/5,WordPress,Yii,Vue.js, AngularJS,HTML,CSS,JQuery, Ajax, Bootstrap • JQuery Plugins/Library – DataTable, Hightchart 5,moment.js • MySQL ,MS SQL Server ,Oracle 9i/10g/11g, MS Access, JBase • Cloud- AWS VPC,EC2,RDS, DynamoDB, Docker • APIs- Infusionsoft, Stripe, 1shoppingcart, FreshDesk, SMS APIs • REST API, JSON, XML • Payment Gateway - WorldPay,PayPal,Authorize.net ,credex • Tools- Selenium, PHPUnit, Postman, Git, SVN, JIRA • IDEs: Sublime, Eclipse, NetBeans • Windows Server 2003/2008/2012, Exchange Server • Unix - AIX, Linux, Ubuntu, CentOS • IBM Storage & TSM Server • C#, ASP.NET • C/C++,Visual Basic, Crystal Report • VMware, Jboss Academic Qualification: B.Sc.Engg. (Computer Science & Engineering)

SQL PHP ASP C Programming Java

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Satish K.

5.0

6.5

96%

South Plympton, Australia

$30 USD per hour

I am a seasoned IT professional with over 20 years of hands-on experience in the software development industry. My expertise spans a wide range of technologies, and I have demonstrated proficiency in the LAMP (Linux, Apache, MySQL, PHP/Python/Perl) stack, alongside a robust understanding of React based stack. Throughout my career, I have been dedicated to delivering high-quality solutions, leveraging my extensive knowledge of backend and frontend technologies. My proficiency in the LAMP stack has allowed me to architect, develop, and maintain scalable web applications with a focus on performance and reliability. In addition to my backend expertise, I have honed my skills in React Native—a framework for building cross-platform mobile applications. My experience in this domain includes developing and optimizing mobile applications for both iOS and Android platforms, ensuring a seamless and responsive user experience. My career journey has equipped me with a deep understanding of the software development lifecycle, from concept to deployment. I am adept at collaborating with cross-functional teams, translating business requirements into technical solutions, and ensuring that projects align with industry best practices. With a passion for staying abreast of emerging technologies and a commitment to continuous learning, I am well-equipped to navigate the ever-evolving landscape of IT. I bring a strategic mindset, problem-solving acumen, and a proven track record of successfully delivering complex projects on time and within budget. As a proactive and adaptable professional, I am eager to contribute my wealth of experience to drive innovation, solve challenges, and deliver exceptional software solutions in both the LAMP stack and React Native environments.

SQL Script Install Data Processing Joomla Android

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Brendon F.

5.0

5.5

100%

Gold Coast, Australia

$30 USD per hour

15 years development experience. Science degree (Maths / Computer Science major). Check my reviews and you will see that I always deliver with quality. Looking forward to tackling the next challenge!

SQL JavaScript XML Visual Basic .NET

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How to hire a great freelance SQL Coder

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.

What a freelance SQL developer delivers

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.

Core deliverables and services

SQL development covers a broad set of tasks. Most freelance engagements include some combination of the following:

Database design and schema modeling, including ER diagrams, normalization to 3NF, and denormalization for analytics workloads

Writing and refactoring complex queries with joins, CTEs, window functions, and recursive logic

Stored procedures, user-defined functions, triggers, and views for reusable business logic

Query performance tuning, including execution plan analysis, index design, and statistics maintenance

ETL and ELT pipelines that move data between transactional databases, data warehouses, and reporting layers

Data migration between platforms such as MySQL to PostgreSQL or on-premise SQL Server to cloud-hosted instances

Reporting and dashboard back-ends connected to Power BI, Tableau, or Looker

Database security work, including role-based access control, parameterized queries, and SQL injection hardening

Backup, recovery, replication, and high-availability configuration

Database platforms and tools

A strong SQL consultant is fluent across multiple relational engines and the surrounding ecosystem. Common platforms and tools include:

Microsoft SQL Server with T-SQL, SSMS, SSIS, and SSRS

Oracle Database with PL/SQL and Oracle SQL Developer

PostgreSQL with PL/pgSQL and pgAdmin

MySQL and MariaDB with MySQL Workbench

Cloud database services such as Amazon RDS, Aurora, Azure SQL Database, and Google Cloud SQL

Analytical warehouses including Snowflake, BigQuery, Amazon Redshift, and Databricks SQL

ETL and orchestration tools such as Apache Airflow, dbt, Talend, and Fivetran

Version control and CI/CD integrations using Git, Flyway, and Liquibase for database migrations

Industries that hire SQL developers

Almost every sector that handles structured data benefits from SQL expertise. Typical use cases include:

Fintech and banking systems requiring transactional integrity and audit trails

E-commerce platforms managing product catalogs, orders, and customer data

Healthcare applications storing patient records under strict compliance requirements

SaaS products with multi-tenant database architectures

Logistics and supply chain operations tracking inventory and shipments

Marketing analytics teams building attribution and customer segmentation models

Gaming and media companies handling high-volume telemetry and user data

How to evaluate SQL developer candidates

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:

Can you describe a query you optimized and explain how you used the execution plan to identify the bottleneck?

How do you decide between a clustered index, a non-clustered index, and a covering index?

What is the difference between a CTE, a subquery, and a temporary table, and when do you choose each?

How would you approach migrating a production database from one engine to another with minimal downtime?

How do you prevent SQL injection in stored procedures and application queries?

Why hire SQL developers on Freelancer.com

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.

Post a project on Freelancer.com today and connect with skilled SQL developers ready to design, optimize, and maintain the databases your business runs on.

What are the steps to hiring a freelance SQL developer?

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.

Step 1: Post your project on Freelancer.com

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 post project page , where you fill in the brief, scope, timeline, and budget before publishing the project for freelancers to bid on.

Name the database engine and version, for example PostgreSQL 15, SQL Server 2019, or Oracle 19c

Describe the data model, approximate row counts of key tables, and any performance issues you have observed

List the deliverables expected, such as stored procedures, schema changes, ETL scripts, or tuned queries

Specify integration points, including the application stack, BI tools, or cloud services involved

Include security and compliance constraints, timeline, and budget range

Step 2: Review bids from freelancers

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.

Look for proposals that name the techniques they would apply, such as index tuning, query rewriting, or partitioning

Note candidates who ask clarifying questions about schema, data volume, or workload patterns

Check that proposed timelines are realistic for the scope, including testing and rollback planning

Confirm familiarity with the surrounding tools, such as SSIS, dbt, Airflow, or specific cloud database services

Use Freelancer.com chat to request sample query plans, prior schema designs, or short technical clarifications before shortlisting

Step 3: Evaluate freelancers and award the project

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.

Review portfolio depth across schema design, query tuning, and migration projects

Check star ratings alongside the volume of completed projects in SQL and database categories

Read written client reviews for comments on code quality, communication, and reliability

Confirm verified payment method, completion rate, and on-time delivery rate

Award the project and set Milestone Payments tied to clear deliverables, so funds are only released when each stage is approved

How long does a typical SQL development project take?

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.

What is the difference between a SQL developer and a database administrator?

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.

Can I hire a SQL freelancer for a one-off query optimization task?

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.

Do I need a SQL developer or a data engineer?

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.

Should I share access to my production database?

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.