Hire the Best Restful API Freelancers
in the Netherlands

If you're dealing with messy manual processes, I turn them into clean, reliable automation systems. I build automation systems using n8n, GPT, and APIs that: Generate and enrich leads automatically Sync data across your tools (CRM, email, Google Sheets, etc.) Replace repetitive manual work with AI workflows Scale your operations without hiring more people Most automations break, are undocumented, or impossible to maintain. I build systems that are structured, scalable, fully documented, and easy for your team to manage. You own everything. What I typically build: Lead generation and enrichment pipelines Sales and CRM automation systems AI-powered inbox and support workflows Google Workspace and internal operations automation Data scraping and processing systems AI agents that take action across your tools How it works: Quick call to map your workflow and define the outcome. I build the system in n8n, test it with your real data, and iterate until it runs perfectly. Send me a message with what you want to automate. I'll tell you within a few hours if it's doable, how I'd build it, and what it would look like.

Clients bring me in for greenfield Flutter builds, difficult codebase rescues, and AI features that have to work in production. I own the work across the app, backend, tests, CI/CD, and release. Recent work: a production Supabase RLS audit and hardening pass, a 410-test Playwright suite for a Next.js portal, and a Postgres outbox implementation for reliable async side effects. I use agents for parallel codebase investigation, adversarial review of my own diffs, and generating tests around risky paths and edge cases. I review and own everything that ships. Client code and data stay within the boundaries agreed for the project. I'm a senior Flutter developer (10+ years mobile, 7+ in Flutter) based in the Netherlands, working with startups and scale-ups across Europe. I'm not just the Flutter layer. I regularly own Next.js portals, Supabase and Postgres including RLS audits and migrations, Hono/Bun backends, CI/CD and TestFlight releases, so you don't need a second freelancer for the backend. My AI work is in production rather than demos: LLM APIs, semantic search with pgvector, and RAG pipelines shipped as features paying users rely on. What I've shipped: fintech and crypto apps, large-scale e-commerce, enterprise onboarding, social apps, inspection/field-service SaaS. Architecture through App Store submission, every time. Stack: Flutter & Dart · Riverpod & BLoC · Firebase & Supabase · PostgreSQL + pgvector · TypeScript / Next.js / Hono / Bun · OpenAI & Anthropic APIs · Fastlane, CI/CD, Playwright Where I fit best: 📱 Greenfield builds - architecture to App Store 🤖 AI features - summaries, semantic search, chat, recommendations 🚑 Rescues - performance problems, state-management messes, codebases left behind by a previous dev 🧪 Hardening - testing, refactoring, security audits, code review How I work: clear, proactive communication, you'll never wonder where things stand. Documented code with tests, because whoever maintains it after me deserves that. And I don't need hand-holding: point me at a problem and I'll own it end to end. If your project needs someone who can think about the whole product, not just the Flutter layer, send me a message and tell me what you're building.

Experienced web developer specialized in webscripting and large scale e-commerce solutions. Freelance Full Stack Developer for over 20 years of work experience with data scraping, API development, database design and web/command-line scripting. Technical skills: HTML5, PHP7/8, (My)SQL, MongoDB, Python, AJAX, JS, JSON, XML, SOAP, RESTful, OAuth1.0a/OAuth2, SAML, SSO, Shopify Plus, NodeJS, Webhooks, Web3 & Blockchain (web3js/ethers/MetaMask/WalletConnect/NFT & Token gated content), DeFi, dApp, WooCommerce (WooCommerce Blocks), OpenAI / AI (GTP-4/Stable Diffusion/ChatGPT/DALL-E 2/Whisper), Google Cloud, Microsoft Azure, Amazon Cloud AWS, Twitter API, Facebook API/Facebook Marketing API, Instagram API, Google Maps API, CSS3, CSS/SVG Sprite optimization, Responsive design, SEO, SEA, CRM connections (like Zoho, UNIT4 Agresso Wholesale AW, Twinfield, Moneybird), Secure Single-Sign-On (like Auth0), payment API (like Stripe, PayPal, Revolut, Chargebee, Multisafepay, Mollie, iDeal), e-Commerce playforms API (like Amazon, Bol.com), physical cash register system to online (Storecontrl, Accountview), content scraping, Packet sniffing & analyzing, webstore systems (custom made and platforms like Shopify, CCVShop, Lightspeed, Webflow, Magento2), (product)feed & stock import, affiliate systems, A/B testing, layout optimization, Big Data, Transactional E-mail/API (like Mailchimp, Mailgun, Sendinblue, Messagebird), Messenging APIs (like Whatsapp, Telegram, Discord, Line.me, Twilio, Sendinblue, OneSignal), Dashboard & Reporting (like Klipfolio, Ongage), 2 factor authentication, custom API design and experience with a lot of other API connections (such as Spotify, Last.fm, Getresponse, Aweber, Bulkfollows, UpViral, Statsperform, ...). Custom WordPress plugin implementations (like WooCommerce/Channable/Gravity Forms/Sensei LMS and homemade plugins), listed & unlisted & private Shopify App development, Shopify liquid theme development and Chromium browser extensions. PDF manipulation (extracting data, overwriting/filling data incl form fields, digital signing, …). Custom Discord bots integrating external APIs, payment systems (Stripe, PayPal, Web3 crypto) and fully custom-built Discord mini-games.