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7.3
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!
5.7
5.7
91%
Sefton, Australia
$15 USD per hour
I have 10 years of experience in website design and development. I provide modern, user-friendly WordPress / Shopify websites that are responsive across all devices (MOBILE, DESKTOP, & TABLET!) and browsers, with professional, fast-loading pages. Do you need a website for your business? I am here to create your dream website that is secure, engaging, and user-friendly. What you can expect: ✔ 100% Client satisfaction ✔ Highly professional and responsive design on all devices ✔ All browsers compatible ✔ SEO and Mobile friendly structure ✔ Speed optimised ✔ Customised design ✔ E-commerce ✔ Premium WordPress themes ✔ Secured and user-friendly admin panel ✔ Social media integration ✔ Mailchimp or other mailing lists integrations ✔ Content upload ✔ EXTRA BONUSES and much more… ✔ Unlimited Support for My Client ---------------------------------------- Experienced In ✔ Programming Languages: HTML, CSS, PHP, Javascript ✔ Wordpress Platform ✔ Shopify Platform ✔ Wix Platform ✔ Squarespace Platform ✔ Framework : Laravel ✔ Adobe Photoshop ✔ Page Builders: Elementor, Gutenberg Block Building, Visual Composer ✔ Frameworks: Genesis, Divi ✔ Integrations: MailChimp, BBpress, Shipstation, SendinBlue, Printify, +many more ✔ Payment Processing Integration: Stripe, PayPal, Square, etc ✔ Contact Form Setup: Contact Form 7, Ninja Forms, etc. ✔ reCAPTCHA security integration ✔ ALL social media integrations ✔ SEO ✔ Blog Design and Development ✔ Blog and Agency Website Design ✔ Real Estate Website Design ✔ Listing Website Design ✔ Ecommerce: Store design & development ✔ WOOcommerce ✔ 50+ WordPress plugins ✔ Website Management and Maintenance ---------------------------------------- Guarantee: ✔ Fully secured to avoid any malware issues. ✔ Fast-loading pages for better conversion and navigability. ✔ Fully responsive for better UI/UX. ---------------------------------------- ✔ I have build 500+ Website and 200+ e-commerce websites. ---------------------------------------- Below are the following skills I possess that your business can benefit from: - Product research (manual process or using an app) - Keywords research (manual process or using Helium10) - Create product description - Listing optimization - Create a family variation - Seller Central Management - Edit product images - Create a shipping plan - Inventory management - Launch and manage Amazon PPC - Create discounts and coupons - Design a packaging - Design a brand store - Design Amazon EBC page - Amazon Listing (UK, US, DE, IT, ES, FR, CA) - A+ Content ---------------------------------------- Have a project to discuss? DM me and let's turn your idea into reality. Who knows the value of time, very hard working and always delivers the work on time. I will finish your tasks in a timely and efficient manner. Please don't hesitate to contact me with any opportunities! I am available 24 hours support.I am available in weekend also.I can work 40+ hours per week.
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.
5.4
5.4
100%
banya, Australia
$50 USD per hour
Exceeding expectations. Building products that move businesses forward. As I'm a senior software engineer, I led a full-stack software engineering team focused on delivering scalable, high-performance digital products across web, mobile, cloud, AI, and automation platforms. I help startups, growing businesses, and product teams design, build, and scale production-ready applications with modern architecture and practical AI integration. With 7+ years of hands-on engineering experience and a broader team with 10+ years delivering digital products, we build software that is scalable, maintainable, secure, and aligned with business outcomes from day one. From architecture and MVP development to deployment and long-term scaling, we focus on turning ideas into reliable products that improve operations, automate workflows, and create better user experiences. What We Deliver AI-powered business automation and workflow systems Custom web applications and SaaS platforms Cross-platform mobile applications Scalable backend systems, APIs, and cloud architecture E-commerce solutions with Shopify, BigCommerce, WooCommerce, and Magento Product optimization, testing, monitoring, and CI/CD UI/UX-focused product development Blockchain and dApp product development AI & Automation Expertise I specialize in applying AI where it creates measurable product value: Intelligent workflow automation LLM-powered assistants and conversational systems Recommendation engines and personalization Predictive analytics and data-driven product features Integration with OpenAI APIs and custom ML services End-to-end AI pipelines from data processing to deployment Core Strengths End-to-end ownership From product planning and system architecture to deployment and scaling. Scalable architecture Built for performance, maintainability, and long-term growth. Business-first engineering Technology choices focused on speed, cost-efficiency, and product outcomes. Reliable execution Clear communication, clean code, and practical delivery. If you need a software engineer that can architect, build, and scale modern digital products — while integrating practical AI capabilities where they create real business value — I'm ready to help. Thanks
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
1.6
1.6
50%
Melbourne, Australia
$25 USD per hour
Highly accomplished Senior-level Full-Stack Developer and R&D Engineer with over 20 years of progressive experience designing, architecting, and deploying enterprise-grade software solutions. 📌 Specialized in modern .NET ecosystems, robust front-end frameworks (Angular, React), and scalable cloud infrastructure (Azure, AWS) across the healthcare, e-commerce, and high-precision laboratory instrumentation sectors. 💪 Proven track record driving complex architectural transitions, executing seamless cloud migrations, and establishing modern distributed systems. Expert in implementing Domain-Driven Design (DDD), Clean Architecture, and CQRS patterns within fast-paced, high-performing engineering teams. Recognized for bridging the gap between cloud-connected web layers and low-latency hardware/firmware interfaces, ensuring full-lifecycle ownership from business requirements to production deployment. 🏗 CORE ARCHITECTURAL FOCUS Distributed Systems: Microservices, event-driven design, serverless architectures, and multi-tenant SaaS. Modern Engineering Practices: SOLID principles, Clean Architecture, Test-Driven Development (TDD). Data & Analytics Integration: Designing strict engineering standards for massive warehouse pipelines (Snowflake) and enterprise relational models. Leadership & Delivery: Facilitating Agile methodologies (Scrum, Kanban, Spotify Scrum Model) and cross-functional team collaboration.
2.0
2.0
100%
Wentworthville, Australia
$30 USD per hour
Enthusiastic software developer looking for a challenge. My Technology Stack:- - HTML & CSS - Javascript (jQuery and Angular) - PHP (Codeigniter, Laravel and Symfony Frameworks) - MySQL - Google Cloud and AWS
2.3
2.3
100%
SHORTLAND, Australia
$25 USD per hour
✅Siara Solutions – Transform Your Digital Presence Siara Solutions is a global tech powerhouse headquartered in Sydney, Australia, with a dynamic, talented team based in Bangladesh. We specialize in building future-ready digital solutions that merge creativity, strategy, and innovation. From intuitive UI/UX to robust web and mobile apps to AI-driven digital marketing — we help businesses lead in the digital age. ✅Who We Are Siara Solutions is a global tech powerhouse headquartered in Sydney, Australia, with a dynamic, talented team based in Bangladesh. We specialize in building future-ready digital solutions that merge creativity, strategy, and innovation. From intuitive UI/UX to robust web and mobile apps to AI-driven digital marketing — we help businesses lead in the digital age. ✅What We Do Best ✔️Web Development – Fast, secure & scalable websites ✔️Mobile Apps – Engaging Android & iOS experiences ✔️Custom Software – Tailored systems that solve real problems ✔️UI/UX Design – Clean, modern, and conversion-focused ✔️E-commerce Solutions – High-performing online stores ✔️API & Payment Integration – Secure, seamless connectivity ✔️AI-Powered SEO & Marketing – Smarter strategies, better reach ✔️Branding & Graphics – Visuals that truly represent your business ✅Tech Stack & Tools ✔️Front-End: React.js, Next.js, Vue.js, Tailwind CSS ✔️Back-End: Node.js, Python (Django/Flask), PHP (Laravel), .NET Core ✔️Mobile: Flutter, React Native ✔️E-commerce/CMS: Shopify, WooCommerce, WordPress ✔️Databases: MySQL, MongoDB, Firebase ✔️Cloud/DevOps: AWS, Azure, Google Cloud ✅Why Siara Solutions? ✔️Global Expertise – Innovation blended with precision across continents ✔️Future-Ready Builds – Scalable solutions built for growth ✔️User-First Approach – Every product designed to perform and delight ✔️Clear Communication – Agile, transparent, and client-focused at every step ✅Let’s Build Something Great From startups to enterprises, we bring your ideas to life with powerful, user-centered technology. Partner with Siara Solutions — your gateway to digital excellence.
1.0
1.0
100%
Werribee, Australia
$50 USD per hour
You just made it to the right profile! Welcome ! I am a Web Designer and expert Web developer along with consultant to many IT firms. I have 15+ Years' experience. Me and my team have launched many E-commerce sites and have handled their social media campaigns and graphics. I have expert knowledge in domains such as website design, social media marketing, Amazon Listing, Email automation, Sales Funnel (with Shopify) and Banner and logo designing. Have handled many clients and provided exceptional results. Currently new to Freelancer, looking for projects where I can showcase mine and my team members skills and help clients in levelling up. Our team consist of trained and certified members who are expert in handling all your requirements. We are expert in WORDPRESS | PHP | SHOPIFY | Laravel | Codeigniter | E-commerce | Woocommerce | HTML5 | BOOTSTRAP | CSS3 | JQUERY | JAVASCRIPT | PHOTOSHOP | ILLUSTRATOR. Ability ★ To lead projects from end to end ★ To work as per Client availability ★ To be result orientated. Commitment will only be made if outcome is confirmed. Every action will be taken with an object to move one step closer to profitability. ★ Transparency and Communication will be the key and working style. ★ Partnership will not end after the milestone is met. I will always be available for any update or optimization work to help keep up with the Trends. In our work, we do our best to meet clients' expectations and deadlines. I look forward to discussing your project together!
A Payment Gateway Integration Engineer is a developer who connects websites, mobile apps, and software platforms to payment processors so businesses can securely accept credit cards, digital wallets, and alternative payment methods. This specialist handles the technical work of integrating APIs from providers such as Stripe, PayPal, Braintree, Adyen, and Authorize.Net, ensuring transactions flow reliably between the customer, the merchant, and the acquiring bank.
Hiring a skilled payment integration engineer is critical because checkout is where revenue is won or lost. A poorly integrated gateway leaks sales through declined cards, failed redirects, and abandoned carts, while a clean integration protects conversion rates, supports global currencies, and keeps sensitive cardholder data outside the merchant's environment. For any business processing online payments, this hire directly affects cash flow, fraud exposure, and regulatory standing.
These engineers build and maintain the full payment stack on the merchant side. The work spans server-side API integration, client-side checkout components, webhook handling, and reconciliation logic. Typical deliverables include:
Payment integration sits at the intersection of backend engineering, security, and platform-specific SDKs. Strong candidates are fluent in REST APIs, webhooks, and asynchronous event handling, and they typically work across several of the following:
Payment gateway integration work is in demand across nearly every sector that collects money online. Common engagements include e-commerce stores adding new payment methods, SaaS companies launching subscription billing, marketplaces building split payments and payouts, mobile apps adding in-app purchases through Stripe Connect or PayPal Payouts, fintech startups embedding card acquiring into their products, donation platforms, education and online course platforms, on-demand services, ticketing systems, and healthcare or telemedicine providers needing HIPAA-aware payment flows. Marketplaces in particular require careful work around KYC, escrow, and disbursement that goes beyond a basic checkout integration.
Because payment code touches money and regulated data, hiring standards should be higher than for general web work. Look for engineers who have shipped live integrations, can speak fluently about edge cases, and treat security as a first-class concern.
Useful interview questions a client can ask directly:
Freelancer.com gives you access to a global pool of payment specialists who have worked across nearly every major gateway, region-specific processor, and e-commerce platform. Whether you need a one-off Stripe integration, a Shopify checkout customization, a multi-gateway routing layer, or ongoing maintenance of subscription billing, you can post a project on Freelancer.com and receive competitive bids from engineers who match your stack and budget. Clients set their own budgets, review verified portfolios, and use Milestone Payments to release funds only when work is verified. The scale of freelancers on Freelancer.com means you can find specialists with deep experience in niche gateways like Razorpay, PayU, Paystack, Flutterwave, or Mercado Pago alongside mainstream providers, making it a practical place to hire on Freelancer.com regardless of which market you serve.
Ready to accept payments cleanly and securely?
Hiring for payment work is different from hiring a generalist developer because the brief needs to be specific about gateways, payment methods, and compliance expectations. The clearer you are about your stack, target markets, and transaction model, the better the proposals you will receive. The process on Freelancer.com follows three straightforward steps.
The project brief is the single biggest determinant of bid quality. For payment integration work, vague briefs attract generic bids, while specific briefs attract engineers who have already shipped exactly what you need. Head to the
Bids are short proposals, not just price quotes. A strong proposal for payment work shows the engineer has read the brief, understands the gateway, and has thought through edge cases like webhook retries, refunds, and authentication. Read each proposal carefully and shortlist candidates whose technical approach matches your requirements.
The final decision combines proposal quality with profile evidence. Payment work rewards consistency, so weigh the depth of a freelancer's track record rather than a single impressive example. Look closely at how previous clients describe communication, reliability, and post-launch support.
A standard single-gateway integration on an existing application typically takes one to three weeks, depending on whether you need subscriptions, webhooks, and refund tooling. More complex work, such as marketplace split payments, multi-currency support with smart routing, or full PCI-compliant custom checkouts, can run longer. The brief, sandbox access, and clarity of your business logic are usually the biggest factors in timeline.
Yes. Many merchants hire a freelancer specifically to ship an initial integration, fix a broken webhook flow, add a new payment method, or migrate from one gateway to another. You can also retain the same engineer on an ongoing basis for maintenance, gateway updates, and fraud tuning once the initial work is live.
A general backend developer can write APIs, but a payment integration specialist understands the specific risks and patterns of money movement: idempotency, webhook reliability, PCI scope, 3DS2, chargebacks, and reconciliation. That domain knowledge prevents costly mistakes like duplicate charges, lost transactions, or accidental storage of raw card data.
If your integration uses hosted fields, iframes, or redirects so card data never touches your servers, you generally qualify for the simplest PCI self-assessment (SAQ-A). A good integration engineer will architect the checkout specifically to keep you in that reduced scope, but compliance ultimately remains the merchant's responsibility.
Yes. Engineers regularly build abstraction layers that route transactions to different processors based on currency, region, card type, or cost. This is common for international merchants who want a primary global gateway alongside local processors for better acceptance rates.
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