Hire the Best API Developers
in Germany

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Anas I.

Berlin, Germany

$50/hr
5.0
28 jobs

Security & compliance lead for SaaS and fintech. SOC 2, ISO 27001, pentesting, and fractional vCISO — so security closes enterprise deals instead of blocking them. I'm an Information Security Lead with 10+ years securing SaaS end-to-end. By day I run AppSec and cloud security at a global B2B SaaS unicorn. On Upwork, I bring that same rigor to founders, CTOs, and security leads who need to get audit-ready — fast. OSCP · CCNSE · CDP | Top Rated | 100% JSS | 25+ five-star reviews | 100+ apps pentested What I deliver: → SOC 2 & ISO 27001 audit readiness (4–8 weeks): gap analysis, 15+ policies, risk assessment, evidence collection, vendor reviews, auditor handoff. Vanta, Drata, Sprinto, Secureframe, Thoropass. → Pentesting (1–2 weeks): OWASP-aligned web, mobile, API. Developer-friendly report with repro steps, CVSS, business impact, and remediation. Attestation letter + free retest included. → Fractional vCISO (retainer): security questionnaires, vendor reviews, board reporting, AWS/Azure/GCP posture, IR readiness, continuous compliance. Best fit if you're: prepping your first SOC 2 or ISO 27001 audit, losing enterprise deals on security questionnaires, stuck inside Vanta/Drata without knowing what to upload, or scaling on AWS and need a security baseline — without paying $250k for a full-time CISO. Frameworks: SOC 2, ISO 27001:2022, NIST CSF, NIST 800-53, PCI DSS, GDPR, HIPAA, OWASP ASVS/MASVS, CIS Benchmarks. Stack: Burp Suite Pro, Nuclei, AWS Security Hub/GuardDuty, Terraform, GitHub Actions, Snyk, SAST/DAST/SCA, Python. Next step: send your scope or just describe where you're stuck. Within 24 hours you'll get a fixed-price quote, SOW, and timeline. If I'm not the right fit, I'll tell you who is.

  • Vulnerability Assessment
  • Kali Linux
  • Penetration Testing
  • Application Security
  • Business with 10-99 Employees
  • Information Security
  • Amazon Web Services
  • Security Analysis
  • Linux
  • Mobile App Testing
  • Security Engineering
  • Web Application Security
  • Information Security Audit
  • Python
  • Website Security
  • Ethical Hacking
Pavel O.

Berlin, Germany

$39/hr
4.8
128 jobs

💼 Python Developer | Python Django | Python Web Scraping | Python Full Stack Developer | Python AI | Python Automation 🏆 TOP RATED PLUS | 💰 $5M+ Client Revenue | 💼 111+ Projects Delivered | ✅ 11,000+ Upwork Hours 💡 Clients Achieved: 🚀 Raised $4.9M+ / $9.4M+ / $6M+ after product development 📈 Scaled platforms to millions of users & billions of operations ⚡ Reduced system load & response time with optimized Python architectures 💰 Automated payments, workflows, and analytics → higher ROI & efficiency 🏥 Built secure, compliant systems (HIPAA, GDPR) used by global organizations I am a Python Developer, Python Full Stack Developer, Python AI Developer, and Python AI Engineer with 10+ years of experience building scalable web platforms, SaaS products, AI systems, and high-performance backend architectures. As a Python Developer, I specialize in designing clean architecture, scalable systems, performance optimization, and production-ready solutions that support real business growth. I work as a Python Full Stack Developer (Python + React / Next.js), combining powerful backend engineering with modern frontend development to deliver complete end-to-end applications. My expertise includes Python Django development, Flask development, and FastAPI development, building robust APIs, microservices, and distributed systems. I am also a Python Automation Engineer and Python Web Scraping Specialist, building intelligent automation systems, data extraction pipelines, and large-scale Python web scraping solutions for business intelligence, analytics, and AI-driven data processing. I design reliable scraping architectures that handle complex, high-volume data at scale. As a Python AI Developer, I build AI-powered applications, NLP systems, automation workflows, and data-driven intelligent platforms integrated with modern Python frameworks and cloud infrastructure. ⚡ Core Expertise as a Python Developer Python Full Stack Development (Python + React / Next.js) Python Django Developer, Flask Developer, FastAPI Developer Python AI Development & Machine Learning Integration Python Automation Engineering for business workflows Python Web Scraping & Data Extraction Systems Scalable backend systems, APIs, and microservices Cloud & DevOps (AWS, Docker, CI/CD pipelines) High-performance, production-grade Python systems 🚀 Selected Projects The Skills ($4.9M raised) 🎓 – Built and scaled an e-learning platform with payments, subscriptions, and mobile apps. As a Python Developer, helped launch a product used by thousands of users worldwide. Veeqo (acquired by Amazon) 📦 – Developed retail infrastructure processing £1B+ in orders. Optimized backend performance, integrated Stripe, and reduced server load using AWS Lambda as a Python Developer. Creyos (75K+ users, healthcare) 🏥 – Built a HIPAA-compliant cognitive assessment platform used by global research institutions. As a Python Developer, worked on secure data systems, scaling, and performance. CityFALCON ($6M raised) 📊 – Created a real-time NLP-powered financial news platform processing millions of articles daily. Designed scalable backend architecture as a Python Developer. ⚡ What I Deliver as a Python Developer Clean, scalable Python AI systems and backend architectures High-performance Python Django / Flask / FastAPI applications Python Full Stack Development (React / Next.js integration) Python Automation & Python Web Scraping solutions AI-powered Python applications and intelligent workflows Secure, compliant systems (GDPR, HIPAA-ready architectures) End-to-end product delivery from idea to production Client Testimonials ⭐⭐⭐⭐⭐ “Very professional! Pleasure to work with. Will definitely use again.” ⭐⭐⭐⭐⭐ “Super reliable, fast, and with clean, well-structured code. Communication was smooth and always on time.” ⭐⭐⭐⭐⭐ “Very satisfied with the work.” 💼 Why Clients Work With Me 10+ years of proven experience as a Python Developer Strong expertise in Python Full Stack, Python AI, and Python Web Scraping Ability to scale systems from MVP to enterprise-level platforms Deep understanding of backend architecture and system design Reliable communication and predictable delivery 🚀 Let’s talk about your project - I am available as your Python Developer, Python Full Stack Developer AI React, Python AI Developer, Python Automation Engineer, Python Django Developer, and Python Web Scraping Specialist.

  • API
  • Python
  • Python Script
  • Data Scraping
  • Automation
  • Artificial Intelligence
  • Machine Learning
  • Deep Learning
  • Scripting
  • Data Extraction
  • Chatbot Development
  • FastAPI
  • Back-End Development
  • Django
  • PostgreSQL
  • JavaScript
  • Flask
  • React
  • jQuery
  • Docker
Svyatoslav M.

Berlin, Germany

$41/hr
5.0
47 jobs

Hi! I'm a Senior Generative AI & Full-Stack Engineer with 15+ years of experience specializing in building production-ready AI applications, Custom Chatbots, and Multi-Agent systems. Are you looking to bridge the gap between advanced Artificial Intelligence and a robust, production-ready web architecture? I deliver scalable, secure, and smart technical solutions that turn complex business ideas into high-performing digital products. I combine deep expertise in foundational backend/frontend stacks with cutting-edge Generative AI engineering. Whether you need an autonomous AI Agent framework, a high-accuracy RAG pipeline, or a complex enterprise web application, I handle everything from core architecture to seamless UI deployment. Please look at my portfolio below to see my "ML-Based Price Recommendation System", "AI-Powered HR Application Full Stack Development", "Full-Stack Developer For Custom ERP", and many others. Core AI & Machine Learning Expertise: - Large Language Models (LLMs): Custom integration, API optimization, and fine-tuning with OpenAI, LLaMA, Claude, etc. - Advanced RAG Systems: Building intelligent Retrieval-Augmented Generation architectures to connect LLMs with private corporate data sources, minimizing hallucinations. - AI Agents & Conversational Systems: Development of autonomous multi-agent workflows, AI chatbots, smart routing systems, and NLP tools (LangChain, LlamaIndex). Robust Full-Stack Stack: - Backend: Node.js, Express.js, PHP (Laravel, Yii), Python, API Integration, and high-load architecture. - Frontend: React.js, Next.js, and modern JavaScript for intuitive, interactive AI user interfaces. - Databases & Cloud: Vector databases (Pinecone, Chroma), PostgreSQL, MySQL, and secure cloud deployment via Amazon Web Services (AWS Partner & Certified Cloud Practitioner) and GCP. Why Work With Me: - 100% Job Success & Top Rated Plus: A proven track record of delivering clean code, meeting strict deadlines, and maintaining clear communication. - Business-Centric Approach: I don't just write code; I design systems that optimize internal workflows, improve user retention, and cut operational costs. - Agile Integration: backed by the engineering strength of the Greenice team, allowing for rapid scaling if your project requires additional resources. Let’s turn your vision into a production-ready application. Click the "Invite to Job" button, and let’s discuss the technical architecture of your project!

  • API Development
  • API Integration
  • Machine Learning
  • Artificial Intelligence
  • Python
  • AI Agent Development
  • AI Chatbot
  • Retrieval Augmented Generation
  • AI Platform
  • LangChain
  • Artificial Neural Network
  • Natural Language Processing
  • Deep Learning
  • TensorFlow
  • Amazon Web Services
  • Google Cloud Platform
  • OpenAI Inc.
  • Node.js
  • Full-Stack Development
  • Web Development
jyoti C.

Berlin, Germany

$38/hr
5.0
5 jobs

I'm a full stack freelance developer from Nepal with awesome NodeJs and AngularJs skills looking to create world-class applications as part of a team at an innovative startup dedicated to solving problems and improve the quality of life. I'm open to new learnings and technologies.

  • AngularJS
  • CSS
  • HTML5
  • Node.js
  • TypeScript
  • Web Development
  • MeteorJS
  • Twitter/X Bootstrap
Zain Ul A.

Bingen am Rhein, Germany

$30/hr
5.0
1 jobs

𝐋𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐢𝐧 𝐲𝐨𝐮𝐫 𝐭𝐢𝐦𝐞𝐳𝐨𝐧𝐞 𝐚𝐧𝐝 𝐫𝐞𝐚𝐝𝐲 𝐟𝐨𝐫 𝐪𝐮𝐢𝐜𝐤 𝐜𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐡𝐞𝐥𝐩𝐢𝐧𝐠 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬 𝐭𝐮𝐫𝐧 𝐢𝐝𝐞𝐚𝐬 𝐢𝐧𝐭𝐨 𝐟𝐚𝐬𝐭 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐫𝐞𝐯𝐞𝐧𝐮𝐞 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐧𝐠 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐰𝐢𝐭𝐡 𝐨𝐯𝐞𝐫 𝟓 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐚𝐧𝐝 𝐀𝐈 𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐟𝐨𝐫 𝐬𝐭𝐚𝐫𝐭𝐮𝐩𝐬 𝐚𝐧𝐝 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬 Full Stack Developer | SaaS, AI & Web Application Expert (5+ Years Experience) 🚀 What I Can Help You Build SaaS Applications & MVP Development * Full Stack Web Applications * AI Applications & Chatbots * Business Automation Tools * CRM & Third-Party API Integrations * Admin Panels & Dashboards * Booking & Reservation Systems * E-Commerce Platforms * Backend APIs & Microservices * Application Optimization & Performance Improvements 🏢 Industries I Have Worked With Healthcare Appointment systems, patient management platforms, workflow automation systems Education (EdTech Learning management systems, course platforms, student dashboards Real Estate (PropTech Property listing platforms, booking systems, CRM integrations E-Commerce Order management systems, inventory control, marketplace integrations SaaS & Startups MVP development, scalable system architecture, product launch solutions 💼 What Clients Achieve Working With Me * Faster product launch without unnecessary complexity * Reduced operational costs through automation * Replacement of manual processes with smart systems * Improved user experience, retention, and conversions * Scalable software built for long-term growth 🛠 Core Tech Stack Backend Development PHP (Laravel), Python, Node.js Frontend Development React.js, JavaScript (ES6), HTML5, CSS3 Full Stack Architectures MERN Stack (MongoDB, Express, React, Node.js) MEAN Stack (MongoDB, Express, Angular, Node.js) Databases MySQL, PostgreSQL, MongoDB AI & Automation Python, AI APIs, workflow automation, web scraping, intelligent agents API & Integrations REST APIs, payment gateways, CRM systems, third-party integrations 📩 Let’s Work Together If you're looking for a reliable Full Stack Developer to build or scale your product, I am available in your timezone and ready for quick communication. Let’s turn your idea into a scalable, high-performance software product. 🔍 Relevant Keywords Full Stack Developer || SaaS Developer || Web Application Developer || AI Developer || Backend Developer || Frontend Developer || Laravel Developer || React Developer || Node.js Developer || Python Developer || MERN Stack Developer || MEAN Stack Developer || API Developer || REST API Development || CRM Integration Developer || Payment Gateway Integration || Booking System Developer || E-Commerce Developer || Dashboard Developer || Admin Panel Developer || Automation Developer || Business Automation Expert || AI Chatbot Developer || MVP Developer || Startup Developer || Scalable Web Applications || Software Engineer || Database Design || MySQL Expert || PostgreSQL Expert || MongoDB Expert || Performance Optimization || Web App Speed Optimization

  • API Integration
  • Full-Stack Development
  • PHP
  • HTML
  • CSS
  • JavaScript
  • Python
  • React
  • MERN Stack
  • React Native
  • Custom PHP
  • Python Script
  • Django
  • PHP Script
  • Bootstrap
  • MySQL
  • SaaS
  • SaaS Development
  • Minimum Viable Product
  • CodeIgniter
Safi Ullah A.

Berlin, Germany

$45/hr
4.6
24 jobs

🎁 A 100% refund if I set the wrong expectation and can’t deliver. No questions asked! 🏅 Upwork certified Full Stack Developer 🏆 Top Rated (Among Top 10% talent on Upwork) 📈 150M+ Active users on my developed Web Apps 💎 8+ Years of Hands-on Experience ✅ 300+ Websites Designed and Developed ✅ Expert in React/Next.js/Nest.js, Vue.js ✅ Expert in Full-Stack Development MEAN/MERN ✅ Expert in Webflow, Bubble, Retool ✅ Expert in Figma, UI/UX Design & Development ✅ Excellent Communication and Project Management Skills ✅ Custom Rag system, LLMs ✅ Model fine tuning, gpt functions to get exact output. *** Available for RUSH projects *** I have experience with the following industries: 💰 Fintech: Scalable financial platforms with real-time data 🏥 Healthcare: HIPAA-compliant patient management and telemedicine 🚚 Logistics: Real-time tracking and fleet management ✈️ TravelTech: Booking systems and travel management tools 🔐 Cybersecurity: Secure applications and data protection 🌾 Agricultural industry 👩‍⚕️ eCommerce FRONT-END SKILLS HTML 5, CSS 3, JavaScript, TypeScript/ECMAScript, React.js, Nuxt.js, Gatsby.js, Flexbox, SCSS, SaaS, Bootstrap, Tailwind and Material-UI BACK-END SKILLS Node.js, Next.js, PHP, Python, Java, Ruby, Express, RESTful API and GraphQL FRAMEWORKS Gatsby.js, Angular, Express CMS, React, Vue.Js Strapi CMS, ContentStack Version Control System: GitHub, GitLab 𝐂𝐌𝐒: → WordPress, Webflow, Shopify, WooCommerce, Wix, Retool, Bubble.io COMMUNICATION AND SOFTWARE MANAGEMENT TOOLS Slack, Discord, JIRA, Asana, Trello, Monday, Clickup, Zoho and Basecamp ✮ Worked with German unicorn companies ✮ Available 18 hours a day BOOK A 30-MIN CONSULTATION Interested in discussing you project details with me? You are one click away from making the next web solution for your business. Message me and book a 30-Min Consultation Call. I'll be happy to provide you the technical project plan, time estimate and overall cost. ABOUT ME I am a proficient web developer with a strong focus on React and the MERN stack, and a knack for creating seamless user experiences. Leveraging my expertise in building dynamic and responsive web applications, I specialize in crafting high-performance, data-driven solutions. With a keen eye for design and overall user-experience, I seamlessly bridge the gap between aesthetics and functionality, delivering visually appealing, user-friendly web solutions. My skills in front-end and back-end development, combined with my proficiency in React / React Native / Node.js / MongoDB / Express / DevOps / GPT and LLM apps development make me a valuable asset in delivering cutting-edge web solutions. Over the course of my 8+ years of professional experience, my enthusiasm for technology and programming has only grown, driving me to solve complex technical challenges and come up with innovative solutions. 𝐍𝐨𝐭 𝐭𝐡𝐞 𝐑𝐢𝐠𝐡𝐭 𝐅𝐢𝐭 𝐈𝐟: ❌ Your business operates in industries like betting or adult entertainment. ❌ You don’t value open communication and collaboration throughout the development process. ❌ Mutual respect is not important to you in a working relationship. 𝐅𝐢𝐧𝐝 𝐦𝐞 𝐰𝐢𝐭𝐡 𝐭𝐡𝐞 𝐤𝐞𝐲 𝐰𝐨𝐫𝐝𝐬 𝐛𝐞𝐥𝐨𝐰: API, RESTful API, API Integration, AWS Lambda, Amazon Web Services, Docker, Git, Agile Software Development, Python, JavaScript, ECMAScript, TypeScript, jQuery, AngularJS, React, Redux, Next.js, ExpressJS, Node.js, Prisma, PostgreSQL, SQL, CSS, CSS3, Sass, Tailwind CSS, HTML, HTML5, Template Markup, Mobile App Development, React Native, iOS, iOS Development, Android, Android App Development, Web Development, Web Application, Website, Web Design, Graphic Design, UI/UX Prototyping, User Authentication, Search Engine Optimization, Social Media Account Integration, Chat & Messaging Software, Twilio API, Expo.io, Landing Page, comfy, polotno, Artificial Intelligence.

  • Web Development
  • TypeScript
  • React
  • Next.js
  • Node.js
  • ExpressJS
  • Tailwind CSS
  • JavaScript
  • Full-Stack Development
  • Web Design
  • MERN Stack
  • Back-End Development
  • Front-End Development
  • React Native
  • Shopify

How it works

Post a job for free Post a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a API Developer in Germany on Upwork?

You can hire a API Developer in Germany on Upwork in four simple steps:

  • Create a job post tailored to your API Developer project scope. We'll walk you through the process step by step.
  • Browse top API Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top API Developer profiles and interview.
  • Hire the right API Developer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a API Developer?

Rates charged by API Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a API Developer in Germany on Upwork?

As the world's work marketplace, we connect highly-skilled freelance API Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream API Developer team you need to succeed.

Can I hire a API Developer in Germany within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive API Developer proposals within 24 hours of posting a job description.