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$175/hr
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I help SaaS and e-commerce teams cut MongoDB Atlas Search query times by 5-50x and lower cluster spend.
Five years optimizing Atlas Search, aggregation pipelines, and high-load read/write patterns on a production Dutch e-commerce platform serving millions of users.
Production patterns I've shipped:
Wildcard match-all queries rewritten to compound + exists filters (10-50x latency reduction)
$$ROOT memory-spill rewrites in heavy aggregations
searchAfter pagination to eliminate skip-based lock storms under load
lowerBound count strategies for fast paginated faceted search
Index selectivity tuning for Atlas Search and standard MongoDB indexes
How I work:
Fixed-price Atlas Search Performance Audit. $499, 5-day delivery. Written report with 8-15 prioritized findings, before/after expectations, and ready-to-apply patches or pipeline rewrites.
Hourly emergency engagements at $175/hr. Production incidents, debugging sessions, scoped optimization sprints.
If your Atlas bill is climbing or your search p95 is creeping past 200ms, that's the work I do every week.
Free 30-minute scoping call before any paid work.
$65/hr
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I design and build AI agents, AI automation systems, and full-stack applications that help businesses automate operations, improve customer experiences, and scale faster.
I specialize in building:
• AI Agents & Multi-Agent Systems
• AI Automation & Workflow Orchestration
• Chatbots & Conversational AI
• Executive AI Assistants
• Full-Stack Web Applications
• API Integrations & Business Automation
• Knowledge Retrieval & Memory Systems
• Enterprise AI Governance Frameworks
I am the founder and lead architect behind EDITH, a multi-domain AI Operating System and Agent Governance Framework, and the lead developer of SamenConnect, an AI-powered healthcare platform.
My stack includes:
• Python
• JavaScript / TypeScript
• Next.js
• React
• Node.js
• LLMs & Prompt Engineering
• AI Agents & Automation
• API Integrations
I focus on delivering practical AI solutions that create measurable business value, not just prototypes.
Let's build something exceptional.
Netherlands
$50/hr
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I'm a Full-Stack Software Developer with a recently completed Bachelor's degree in Software Engineering and a strong foundation built through hands-on projects, internships, and professional experience.
I enjoy solving complex problems by first understanding the bigger picture. Before writing a single line of code, I take the time to understand the business goals, user needs, and technical challenges so I can build solutions that are both effective and maintainable.
My experience includes developing modern web applications across the full stack, collaborating in Agile teams, and writing clean, scalable code. I'm always eager to learn new technologies and continuously improve my skills.
$50/hr
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I am a Full Stack Developer with over 7 years of experience in building responsive and scalable web applications using the MERN stack, Next.js, Vue.js, and TypeScript. My expertise lies in delivering end-to-end products, whether it's creating interactive 3D configurators, blockchain-integrated platforms, or multilingual enterprise applications. I excel in both frontend and backend development, owning the architecture and leading teams to ensure high-quality software delivery. My collaborative approach and focus on reliability allow me to effectively tackle complex challenges. If you're looking for a developer who can seamlessly blend innovative solutions with practical execution, let's connect and discuss how I can help elevate your project to the next level.
Netherlands
$14/hr
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I'm a Frontend Developer focused on building clean, responsive websites and web apps using React, JavaScript, and modern CSS. Whether you need a landing page, a new UI feature, or support on an existing React project, I can help.
- Comfortable with React, JavaScript (ES6+), HTML5, CSS3, and responsive design
- Careful with detail — I test across screen sizes before calling anything done
- Clear communication throughout the project, with regular updates so there are no surprises
- Currently building my track record on Upwork and fully committed to delivering quality work on every project
Let's talk about what you're building — I'm ready to get started.
$75/hr
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Founder of Digiforq, a Dutch software and AI consulting company. I build full-stack web applications, integrate AI into business workflows, and design custom AI agents that connect to real business systems (CRM, ERP, e-commerce platforms) - not just scripted chatbots.
Proof of delivery: I built and launched Compulingo (compulingo.app), a live, worldwide freemium coding-education platform with an integrated AI assistant - end to end, from backend to production.
What I offer:
- Custom web/mobile applications, APIs, integrations
- AI agent development (customer service, workflow automation)
- IT advisory & digital transformation
Based in the Netherlands, working with clients locally and internationally.
$30/hr
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Throughout my career, I have been acknowledged as a
solution-focused professional with the ability to design
and develop innovative applications using advanced
technologies. In my prior role as Full-stack Developer for
LaunchCode, I collaborated closely with the application
team to develop and implement 80+ full-stack web
applications, ensuring optimal functionality, quality, and
reliability.
Netherlands
$30/hr
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WEB | Blockchain Developer
Summary
As a senior professional developer with 8+ years of web development
experience, I provide you high quality services.
I have an eye for great design, extreme attention to detail, creative
development, strong communication skills, and efficient workflow.
I have a technical background - Engineer's degree in Computer
Science and strong software development experience, so I can
effectively communicate with both experts and non-technical people.
I always strive to have all my clients satisfied with my working
methodology and solutions.
My results-oriented nature does not allow me to stop work on your
project until completion.
$25/hr
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I am a skilled backend developer with over 12 years of experience creating robust systems that enhance user experiences and streamline operations. My journey began with an academic foundation in software engineering, where I honed my skills in building scalable backend solutions. I thrive on developing efficient algorithms and integrating APIs that drive business success. My recent role involved modernizing legacy systems and implementing cloud solutions, which improved performance and reduced costs. I focus on delivering high-quality code, collaborating closely with teams, and adopting best practices in software development. If you need a backend expert who can tackle complex challenges and contribute to your project’s success, let’s connect. I look forward to discussing how I can help elevate your vision.
$50/hr
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I am a Front-end Developer with 7 years of experience creating dynamic and user-friendly web applications. My expertise encompasses HTML, CSS, JavaScript, and modern frameworks that enhance user experiences. I have successfully contributed to projects across various sectors, from startups to established firms, always ensuring that I meet client specifications with precision.
My recent role involved collaborating with cross-functional teams to optimize application performance and improve functionality, refining both code and design to align with best practices. I thrive on tackling challenging development tasks and finding innovative solutions that enhance web performance. If you're seeking a reliable developer who can elevate your digital presence and deliver impactful results, let's connect to discuss your project goals.