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8.0
8.0
100%

West Beach, Adelaide, Australia
$35 USD per hour
Hello, my name is David Sharples, owner of Blackball Design, an Australian-based web and graphic design firm. Website and graphic design has been a passion of mine for years, one that I have had the privilege of turning into a full-time career for over fourteen years now. Having professionally trained at TAFE SA in Information Technology and Multimedia and cultivated years of experience working in the corporate environment and as a solo freelancer, I've developed a diverse repertoire of skills that I've used to help hundreds of satisfied customers. I've leveraged my expertise with the Adobe Creative Suite to produce sophisticated graphics, branding and promotional materials in a wide range of styles. At the same time, I've applied online coding languages such as HTML and CSS and CMS systems like WordPress to create professional and highly customised web presences. These are skills I can put to use to help you. I pride myself on my high quality service and responsiveness to feedback as well as my flexibility and dedication to client satisfaction, helping people evolve their ideas, bring them into fruition and further their goals and services. Having worked with a wide array of clients locally here in Australia and internationally, I've assisted individuals, small businesses and large companies with projects extensive and small, aiding them with whatever they need. Organisations I've assisted and continue to work with include the Premier Group, International Bullying Prevention Association, CDFS, Macmahon Holdings and many others. Whether you need a logo, business cards or stationery, brochures or promotional flyers, digital or print advertising, including posters and signage, infographics, icons, social media post imagery, photo edits or even a website, new or just help with an existing one, my services are available. Feel free to have a look through my portfolio to see what I can do for you and, if you are interested, contact me and I'll be happy to chat and discuss whatever you need. ABN: 13178662728
5.7
5.7
97%

Perth, Australia
$50 USD per hour
I provide complete IT services tailored to modern business needs, with a strong focus on Blockchain development, Artificial Intelligence, Machine Learning, Big Data, Web and Mobile app development, E-commerce platforms, and custom software solutions. I specialize in blockchain technologies including DEXs, DApps, NFTs, Web3, smart contracts, and DeFi applications across platforms like Ethereum, BSC, and Polygon. For web and mobile development, I work with Java, Python, PHP, and top JavaScript frameworks such as React.js, Node.js, Angular, and Vue.js—alongside mobile technologies like Flutter and React Native. My e-commerce solutions are built on platforms like WooCommerce, Shopify, and Magento, while my AI and machine learning services leverage tools such as TensorFlow and AWS to create intelligent, data-driven systems. If you're looking for secure blockchain integration, modern web and mobile development, scalable e-commerce systems, or custom AI-driven software, I’m here to help turn your ideas into powerful digital products.

6.4
6.4
88%

Homebush, Australia
$50 USD per hour
Hey there. I am Rolesh, a software developer and I have a team with 8 years of experience in software development. Specifically, we have extensive experience in Web, Mobile, AI, game development. 1. Game Development Unity, Unreal Engine, Construct (WebGL, Mobile, PC Game) Multiplayer, PvP Lua, Godot, Phaser, Minecraft, Java Telegram mini game, trading bot Cinematic, Sandbox In app purchase, Playfab, photon Augmented reality, virtual reality, Metaverse Vuforia, ARCore/Kit, Zapworks, 8th wall Kinetic, Oculus 2. Mobile app development Proficient in developing cross-platform mobile applications using React Native and Flutter. 3. Web Development React.js, Three.js, Node.js, Angular.js, MongoDB Wordpress, eCommerce, Wix, Magento, Shopify Laravel, MySQL, GoLang, Django Admin dashboard 4. Artificial Intelligence, IOT Python, Django AI, ML, API Integration, OpenCV, Tensorflow 5. Blockchain Web3, Cryptocurrency, Solana, Solidity, Metatrader 6. Design UI/UX design Logo Design and Animator

7.2
7.2
100%

Melbourne, Australia
$75 USD per hour
WebAIProTech specializes in delivering high-quality software, AI-powered solutions, electronics development, and intelligent automation systems. We help businesses build scalable, modern, and high-performance digital products across web technologies, artificial intelligence, e-commerce, mobile applications, embedded electronics, automation, and Salesforce ecosystems. Services Offered: • Web Development Custom websites, SaaS platforms, dashboards, portals, and scalable web applications with modern user experiences. • AI Solutions Design and development of intelligent systems using OpenAI, Claude, Gemini, LangChain, LangGraph, RAG pipelines, AI agents, realtime AI, voice AI, and workflow automation. • E-Commerce Development Custom e-commerce platforms, subscriptions, payment gateways, marketplaces, and conversion-focused shopping experiences. • Mobile App Development Cross-platform and native-feeling mobile applications for iOS and Android designed for customer engagement and business workflows. • Electronics & Embedded Systems Custom electronics solutions including IoT devices, microcontroller firmware, sensor integrations, edge AI systems, Raspberry Pi, ESP32, Arduino, hardware prototypes, and connected device platforms. • Automation Services Workflow automation using N8N, Airtable, Zapier, Make.com, API orchestration, CRM integrations, and business process automation. • Salesforce Development Salesforce CRM customization, integrations, dashboards, data synchronization, and workflow automation. Deliverables: • Landing Pages • Corporate Websites • SaaS Platforms • Web Applications • AI Systems & Agents • RAG Platforms • Voice AI Solutions • Mobile Applications • IoT and Embedded Systems • CRM Implementations • Workflow Automation Platforms • Dashboards and Reporting Systems • API Integrations • Custom Software Solutions Tools and Technologies: • Frontend & Web Technologies React, Next.js, Vue.js, Nuxt.js, Svelte, TypeScript, JavaScript, PHP, Tailwind CSS • Backend & Cloud Node.js, NestJS, Python (FastAPI, Flask, Django), PostgreSQL, Supabase, Firebase, AWS, Azure, GCP, Docker, Kubernetes, CI/CD • AI & Machine Learning OpenAI, Claude, Gemini, LangChain, LangGraph, LlamaIndex, Pinecone, Weaviate, TensorFlow, PyTorch • Mobile Development Flutter, React Native, Swift, Kotlin • Electronics & IoT ESP32, Arduino, Raspberry Pi, STM32, MQTT, Bluetooth Low Energy (BLE), Edge AI, Sensor Networks • Automation & CRM Salesforce, N8N, Airtable, Zapier, Make.com • Design & Collaboration Figma, Adobe XD, Photoshop, GitHub, GitLab With multidisciplinary expertise and real-world product experience, WebAIProTech focuses on building innovative, scalable, and efficient solutions that help businesses grow, automate operations, and unlock new opportunities. Whether it's a startup MVP, AI-powered platform, mobile application, enterprise system, or connected IoT product, we provide the technical expertise to bring ideas to life.

5.5
5.5
92%

Sydney, Australia
$75 USD per hour
Phantom Interactive provides DevOps and AWS assistance flow utilizing industry proven tools to customers who needs to automate and scale their services. We can assist with release management, infrastructure management, build and deploy pipelines, containerization and orchestration. From managing a development to designing and building infrastructure and CICD pipelines, we can make the difference in a successful project or not. Core skills and capability in our arsenal: - AWS infrastructure and services - CICD automation - Agile coaching, DevOps practices - Containerized workloads, EKS, ECS, native K8s and Docker workload - Blockchain and Crypto expertise, automated trading and analysis - AI implementations, ChatGPT modelling

6.4
6.4
100%

PERTH, Australia
$82 USD per hour
For over two decades, I’ve been engineering software that doesn’t just work — it performs, scales, and feels effortless. I specialise in AI-driven software engineering using Python, JavaScript, and AWS, building everything from fast APIs to full end-to-end SaaS platforms. Front-end to back-end, I turn ideas into smooth digital experiences. SQL or NoSQL — I design and optimise databases that run clean and handle real load. APIs & automation — I build scalable REST services and workflow automation that keep products running smoothly. My approach is simple: engineer clean systems, automate the boring parts, and make everything feel seamless in the real world — from the UI to the database to the cloud. Over the past few years, I’ve been working hands-on with AI across practical, production-ready use cases: chatbots, trading bots, analytics tools, talking avatars, object detection, and image generation. My focus is always the same - making AI engine that actually get used, make sense, and deliver value to the product. Whether it’s Python microservices, JavaScript front-ends, AWS cloud architecture, or building a full SaaS system from scratch, I aim for clean engineering and a result that feels remarkable in the real world. Cheers, Vishal Maharaj

4.3
4.3
100%

Strathfield, Australia
$45 USD per hour
Hello! I’m 𝑽𝒊𝒓𝒂𝒋 𝑲𝒂𝒓𝒂𝒏𝒈𝒖𝒕𝒌𝒂𝒓, a software engineer based in 𝐀𝐮𝐬𝐭𝐫𝐚𝐥𝐢𝐚. More than just writing code, I like to work as a technical partner for the people I collaborate with. Many projects start as an idea on paper, and my role is to help turn that idea into something real, stable, and ready for users. From the first concept to the final delivery, I focus on building systems that are reliable, scalable, and pleasant to use. Technology changes quickly, but good engineering and clear thinking never go out of style. One thing clients quickly notice about me is that I care a lot about trust and reliability. If something is in production and people depend on it, it should work properly. That mindset guides how I design and build software. 𝐖𝐡𝐚𝐭 𝐈 𝐇𝐞𝐥𝐩 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬 𝐁𝐮𝐢𝐥𝐝 ✔ Mobile Applications Apps that feel fast, smooth, and natural for real users. Whether it's a startup product or a business tool, I focus on making mobile apps that people actually enjoy using. ✔ Desktop Applications Powerful desktop tools for internal operations, automation, or specialized workflows. These are often the quiet heroes inside companies that keep everything running efficiently. ✔ Web Platforms Modern web applications, dashboards, marketplaces, SaaS products, and business systems. I enjoy building platforms that help companies operate more efficiently and scale their services. 🤖 AI & Intelligent Systems I’ll be honest… I’m a bit of an AI enthusiast. Over the past few years I’ve spent a lot of time learning how AI can actually be useful inside real products, not just demos. ✔ Integrating APIs like OpenAI or Claude ✔ Building chatbots and AI assistants ✔ Creating RAG pipelines for knowledge systems ✔ Working with model tuning and intelligent automation From simple AI integrations to more advanced AI-powered systems, I enjoy helping products become smarter and more capable. 𝐌𝐲 𝐒𝐤𝐢𝐥𝐥𝐬 Technically, I work across multiple parts of the stack. ✔ Mobile technologies such as Kotlin, Swift, Java Flutter and React Native ✔ Web development with ASP.NET, React, Vue, Angular, PHP, Laravel ✔ Desktop development using modern frameworks and tools (C#, Electron, Qt etc) ✔ APIs, backend architecture, and scalable systems I also have experience with CMS platforms like WordPress, Wix, and Kajabi, along with DevOps, cloud infrastructure, and database design. If I tried to list every tool or technology I’ve worked with, this profile would probably turn into a few extra pages, so I’ll stop here😅. 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 ✔ Clear communication and honest collaboration ✔ Careful architecture and maintainable systems ✔ Reliable delivery and long-term thinking If you have an idea and want someone who can help turn it into a solid, well-engineered product, I’d be happy to help. Let’s build something 𝑨𝑴𝑨𝒁𝑰𝑵𝑮 and 𝑹𝑬𝑴𝑨𝑹𝑲𝑨𝑩𝑳𝑬.

4.4
4.4
100%

Edgewater, Australia
$60 USD per hour
I'm a full stack developer with a focus on LLM applications. I am competent in Python (FastAPI, Flask & Langchain), JavaScript (Next.js, React & React Native). My preferred database is Supabase. My website: https://extensa.agency
An OpenAI developer is a software engineer who builds applications, automations, and AI-powered products using OpenAI's APIs, including GPT models, the Assistants API, function calling, embeddings, DALL-E, and Whisper. These specialists translate business problems into prompt-engineered, model-driven solutions that ship to production. Hiring an OpenAI developer gives you direct access to the engineering skills needed to integrate large language models into your product, workflow, or internal tooling.
An OpenAI developer ships working software that uses OpenAI's models to perform real tasks: answering customer questions, summarizing documents, generating content, classifying data, transcribing audio, or automating multi-step workflows. The commercial value is measurable — faster support response times, reduced manual work, new product features, and AI capabilities embedded directly in your stack.
Typical deliverables include API integrations, custom GPTs, retrieval-augmented generation (RAG) pipelines, AI agents, chatbots, and fine-tuned models. A skilled OpenAI engineer also handles prompt engineering, token cost optimization, evaluation frameworks, and guardrails so the system behaves reliably at scale.
Strong candidates work fluently across the OpenAI Platform and the wider AI engineering ecosystem. Expect familiarity with the OpenAI Python and Node.js SDKs, the Assistants API, function calling, structured outputs, and the Realtime API for voice. Most production builds also touch orchestration frameworks like LangChain or LlamaIndex, vector stores such as Pinecone or pgvector, and backend frameworks like FastAPI, Next.js, or Express.
Deployment usually involves AWS, Google Cloud, Azure, Vercel, or Cloudflare Workers. Many OpenAI developers also handle observability with tools like LangSmith, Helicone, or Langfuse to monitor prompt performance, token usage, and latency in production.
OpenAI developers work across virtually every sector where text, voice, or image processing has commercial value. Common industries include SaaS, e-commerce, fintech, legal tech, healthtech, education, media, real estate, and customer support. Typical use cases include AI customer service agents, contract review tools, internal knowledge assistants, content generation for marketing teams, lead qualification bots, code generation tools, and AI-powered analytics dashboards.
Startups hire OpenAI developers to build AI-first products from scratch. Established businesses hire them to add AI features to existing software or to automate internal operations.
Look for candidates with hands-on production experience shipping LLM-based applications, not just tutorial-level familiarity. Strong portfolios include live chatbots, deployed RAG systems, or open-source contributions to the AI tooling ecosystem. Proficiency in Python or TypeScript is essential, along with a clear understanding of prompt engineering, token economics, model selection, and evaluation.
Useful interview questions to ask:
Ask for code samples, public GitHub repositories, or live demos of previous OpenAI projects. Verified payment methods, completed projects, and detailed written reviews on the freelancer's profile are strong signals of reliability.
Freelancer.com hosts a global community of AI engineers, machine learning specialists, and full-stack developers who specialize in OpenAI integrations. You can compare profiles, portfolios, ratings, and competitive bids in one place. Whether you need a one-off custom GPT or a long-term engineer to build out your AI product roadmap, you can find vetted talent on Freelancer.com across every time zone and budget level. Clients set their own budgets and receive proposals from freelancers worldwide, making it straightforward to match scope to spend.
Ready to build with GPT, Whisper, DALL-E, or the Assistants API?
Hiring an OpenAI developer is straightforward when you give bidders a clear technical brief. Because LLM projects vary widely — from a simple ChatGPT plugin to a full agent system — the more specific you are about the model, data, and integration points, the better the proposals you'll receive. The process below walks through posting, reviewing, and awarding the project.
Your project post is the single biggest factor determining bid quality. A clear brief filters out generalists and attracts developers whose OpenAI experience genuinely matches your use case. Head to the
Bids are short proposals, not just price quotes. Read them carefully — a strong OpenAI developer will reference your specific use case, suggest a model and architecture, raise sensible technical questions, and propose a realistic timeline. Use Freelancer.com chat to clarify anything before shortlisting.
The final decision combines proposal quality with profile evidence. Look for consistent delivery across multiple OpenAI or AI projects rather than a single impressive demo. Verified credentials, written client reviews, and a deep portfolio of LLM work are the strongest signals.
An OpenAI developer specializes in building applications on top of pre-trained models from OpenAI, focusing on prompt engineering, API integration, RAG, and agent workflows. A machine learning engineer typically trains and deploys custom models from scratch. For most LLM-powered product features, an OpenAI developer is the right hire.
A simple chatbot or internal tool can be built in a few days to two weeks. A production-grade RAG system, AI agent, or fine-tuned model usually takes three to eight weeks depending on data preparation, evaluation, and integration complexity. Ongoing optimization and prompt iteration often continue after launch.
Yes. Many freelancers on Freelancer.com take on fixed-scope projects such as building a custom GPT, integrating ChatGPT into an existing app, or creating a Whisper transcription tool. You can also hire on an hourly basis for ongoing development and maintenance.
Yes, in almost all cases. The client owns the OpenAI account and API key so usage costs are billed directly and you retain control of data, rate limits, and access. Your developer will use your key during development and deployment.
For focused builds, MVPs, and feature integrations, a skilled freelance OpenAI developer is usually faster and more cost-effective. Agencies make sense for large multi-team programs with complex compliance or enterprise integration requirements. Many businesses start with a freelancer and scale from there.

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