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Hire the best API Developers in Berlin, DE

Check out API Developers in Berlin, DE with the skills you need for your next job.
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  • $50 hourly
    • 5.0/5
    • (11 jobs)
    With a robust background in Frontend, Backend, and DevOps Engineering, I specialize in making cloud computing accessible and efficient for businesses of all sizes. I have assisted numerous clients in demystifying the cloud and am eager to support your digital transformation journey—whether that involves ideation, development, or deployment of your web applications and sites. Technical Skills: - Languages & Frameworks: Proficient in HTML/CSS/Javascript, PHP/Laravel, Node/Typescript, React/Vue/Next/Nuxt, and Python/Django, with an eye for clean, maintainable code. - Cloud & DevOps: Advanced experience with AWS, crafting scalable, secure, and cost-effective cloud architectures. - Data Engineering: Expert at building ETL pipelines, managing data flows, and enabling data-driven decision-making. - Artificial Intelligence: Skilled in integrating AI and OpenAI models into applications for enhanced functionality and smarter insights. Familiar with third party APIs such as Vapi, Blend AI and ElevenLabs. What I Offer: - End-to-End Project Management: I'll guide your project from initial concept to final deployment, ensuring a smooth process at every stage. - Collaborative Learning: I'm passionate about continual improvement and growth, for myself and those I work with. Let's learn and innovate together. - AI Integration: Whether enhancing features with AI, improving automation, or offering predictive analytics, I can bring cutting-edge AI capabilities to your projects. Let’s Connect! Cloud doesn't have to be intimidating, and neither does the prospect of integrating AI into your business solutions. If you're interested in leveraging cutting-edge technologies to elevate your projects, let's chat. Together, we can turn your ideas into impactful digital experiences.
    Featured Skill API Development
    Vue.js
    TypeScript
    React
    PostgreSQL
    JavaScript
    AWS Lambda
    Jira
    GitHub
    NoSQL Database
    Amazon Web Services
    Data Engineering
    CI/CD
    Docker
    Python
  • $15 hourly
    • 4.5/5
    • (21 jobs)
    Asad Ali | Full-Stack Developer & DevOps Specialist With 7+ years of experience, I deliver end-to-end development and deployment services, combining frontend, backend, and DevOps expertise to build scalable and robust solutions for startups, SMEs, and enterprises. Core Expertise: - Frontend: React/Redux, React Native, AngularJS, Next.js, JavaScript, Tailwind, Bootstrap. - Backend: Python (Django, Flask, FastAPI), Node.js, Express.js, REST/GraphQL APIs. - Databases: PostgreSQL, MySQL, MongoDB, DynamoDB. - DevOps: CI/CD pipelines, Docker, Kubernetes, AWS, Azure, GCP, Ansible, Jenkins, Serverless. - Other Specialties: WordPress development, API integration, cloud architecture, POC/MVP creation, digital transformation. Why Choose Me? I have successfully delivered projects across diverse industries, including SaaS, eCommerce, healthcare, fintech, and real estate. My focus is on: Providing scalable architectures tailored to your business needs. Ensuring seamless end-to-end project delivery with attention to detail. Building applications that drive results. Whether you're looking for custom web applications, expert DevOps solutions, or a reliable developer to guide your project, I’m here to help. 💡 Let’s discuss your project needs and bring your ideas to life!
    Featured Skill API Development
    CMS Framework
    Web Application
    Web Design
    RESTful API
    Angular 10
    Amazon
    Angular
    Python
    React
    DevOps
    iOS Development
    WordPress
    Android App Development
    Django
  • $50 hourly
    • 5.0/5
    • (43 jobs)
    With over a decade in the tech industry, I'm a seasoned, versatile Polyglot Engineer. My hands-on experience has equipped me with a deep understanding of cutting-edge tools and technologies, ensuring the delivery of robust and scalable backend solutions. I have had the privilege to work closely with a company whose innovative products are trusted by global giants like Sony, Apple, and Samsung. This exposure has instilled in me the importance of exceeding top-tier expectations and maintaining a gold standard in all deliverables. My commitment to quality, performance, and security is unwavering. As a natural problem-solver, I thrive on challenges and continuously seek to enhance my knowledge. Beyond my technical expertise, I possess strong leadership capabilities, enabling me to guide and inspire teams towards shared goals and success. My collaborative approach, coupled with exceptional communication skills, positions me as a valuable asset to any team or project. Let me leverage my extensive experience to enhance your organization's technical capabilities and drive innovation forward.
    Featured Skill API Development
    Rust
    API
    Laravel
    JavaScript
    Golang
    Git
    TypeScript
    PHP
    Core PHP
    Node.js
    MySQL
    PHP Script
    Symfony
  • $50 hourly
    • 5.0/5
    • (8 jobs)
    Coding Ninja |Swift dispatcher of bugs | Developer of enchanting code | JavaScript | React | Next.js Node.js | Three.js | Wordpress | AI / ChatGPT | Solidity | Redux | Strapi With over 5 years of experience, I am a seasoned Full Stack Developer and Designer dedicated to crafting exceptional solutions for web applications. Proficient in JavaScript, React, Next.js, Node.js, Express, Three.js, WordPress, MySQL, postgreSQL, MongoDB, Prisma and more, I guarantee top-quality development and captivating design to elevate your online presence. Let's collaborate to turn your vision into reality!
    Featured Skill API Development
    Shopify
    Web Design
    HTML5
    CSS
    Front-End Development
    MongoDB
    Node.js
    React
    Bootstrap
    ExpressJS
    JavaScript
    Solidity
    Web Development
    Smart Contract
  • $40 hourly
    • 5.0/5
    • (3 jobs)
    I specialize in building high-performance backend systems that handle millions of requests daily, with 8 years of hands-on experience in crypto exchanges and fintech platforms. As a senior backend developer, I've consistently delivered scalable solutions that reduced server costs by 40% while improving response times. My expertise in Golang and Python enables me to create efficient, maintainable systems that grow with your business. Having led backend development at a major cryptocurrency exchange and served as CTO, I bring both technical depth and strategic thinking to every project. Core skills: - Backend: Golang, Python, PHP - Cloud & Infrastructure: AWS, GCP, GKE Kubernetes - Databases: PostgreSQL, MongoDB, Redis - API Design: REST, gRPC I'm available to start immediately and can provide daily updates through your preferred communication channel. I break down complex projects into clear, manageable phases and ensure transparent communication throughout the development process.
    Featured Skill API Development
    Web Development
    PHP
    API
    Laravel
    Golang
    Continuous Integration
    Microservice
    PostgreSQL
    Amazon Web Services
    Kubernetes
    Docker
  • $40 hourly
    • 5.0/5
    • (4 jobs)
    Welcome to my profile on upwork! I am a python developer, specializing in automated web scraping using the scrapy framework. As a curious person by nature, I've spent a lot of time diving into the technical details of how the web works, and I've used this knowledge to automate data collection tasks for a variety of personal and professional projects. I'm highly intrigued by understanding how a given web server works and how web scraping can be leveraged to efficiently and robustly extract the necessary data for your projects. For example, this may include automating HTTP requests, directly accessing the internal API, or interacting with the frontend using a virtual browser instance. I received my Bachelor's in Computer Science from Humboldt University Berlin in 2021 and have since been working as a software developer at Charité Berlin's Brain Simulation Section, as well as on a number of projects as a freelancer. To ensure that my work will be easy to maintain and extend, I focus on writing clean and concise code that adheres to modern formatting standards and best practices. I look forward to hearing about your project! For further reference, feel free to visit my github page on github.com/mahathu.
    Featured Skill API Development
    Automation
    Data Visualization
    Python
    Data Scraping
  • $40 hourly
    • 5.0/5
    • (11 jobs)
    A skilled software engineer who can get things done and deliver work that meets and satisfies my clients' requirements. I take ownership of my work and ensure that the work I deliver is well-tested and at least meets my clients' expectations. I'm recognized for delivering clean, scalable, flexible, and quality code. A brief introduction about myself: I am a Senior Software Engineer with 9+ years of experience in designing, developing, and maintaining web and mobile applications. I have worked as a full-time employee with various companies, from startups to big corporations such as Groupon, Amazon, and HubSpot. I am currently working as a freelancer because of the variety and growth opportunities it provides. If you have any questions, feel free to contact me, and I would be glad to assist you in reaching your goals.
    Featured Skill API Development
    MySQL
    TypeScript
    Scala
    AWS Lambda
    Hibernate
    AWS CloudFormation
    Apache Spark
    Spring Boot
    Amazon S3
    Amazon DynamoDB
    Kotlin
    Apache Kafka
    Java
    JavaScript
  • $40 hourly
    • 0.0/5
    • (0 jobs)
    "I'm a developer with expertise in building websites and web applications using the latest technologies. I can help you build a cutting-edge website that reflects your brand and meets your business goals. I'm experienced in HTML5, CSS3, JavaScript, React, Node.js, TypeScript, and GraphQL. I can provide full project management services, from defining requirements to delivering a final product that meets your specifications. Communication is a top priority for me, and I will keep you informed every step of the way to ensure your complete satisfaction with the final product."
    Featured Skill API Development
    Database Programming
    Computer Engineering
    API
    Front-End Development
    Database
    Computer Vision
    Engineering & Architecture
    Computer
    Distributed Computing
    Artificial Intelligence
    RESTful API
    Amazon Web Services
    C++
    Angular
  • $50 hourly
    • 5.0/5
    • (1 job)
    I'm a Software Engineer with 5 years of production experience and hands-on experience in DevOps/Cloud engineering. In my previous roles I spent most of my time working around AWS, Linux servers, Web servers, containers, databases and Backend applications, helping teams to build stable distributed systems.
    Featured Skill API Development
    CI/CD
    Django
    Web Service
    Microservice
    Back-End Development
    Cloud Computing
    TypeScript
    Flask
    Web Services Development
    Amazon Web Services
    Engineering & Architecture
    Amazon EC2
    Linux System Administration
    Python
  • $40 hourly
    • 0.0/5
    • (1 job)
    Crafting elegant code that powers innovative businesses – reliable, fast, and always pushing the boundaries!" – CTO, E-commerce Startup. My clients trust me to turn their complex ideas into seamless, scalable products that drive growth. Whether you're launching a new startup or scaling an existing platform, I'm here to bring robust, future-proof solutions to life. With over 10 years of experience, I specialize in: ✅ Full-stack software development ✅ Custom web app development ✅ API creation and integration ✅ Building POCs and MVPs for startups ✅ Cloud infrastructure & deployment I work with startups and enterprises across industries, filling tech gaps, building teams, and accelerating digital transformation: 🔸 HealthTech 🔸 E-commerce & Retail 🔸 Fintech 🔸 Manufacturing 🔸 Real Estate 🔸 Logistics & Fleet Management 🔸 SaaS Tech Stack: ☑️ Python | Django | Django REST ☑️ Flask | FastAPI ☑️ PostgreSQL | Redis ☑️ Celery | Docker | Kubernetes ☑️ AWS | Azure | GCP | DigitalOcean Let's collaborate to build powerful, scalable applications that stand the test of time. Send me an invite – I'm ready to get started!
    Featured Skill API Development
    Web Application Development
    Machine Learning
    Artificial Intelligence
    API Integration
    Database Architecture
    Payment Gateway Integration
    LLM Prompt Engineering
    Web Scraping
    Chatbot Development
    JavaScript
    Python
    React
    PostgreSQL
    Web Development
  • $80 hourly
    • 0.0/5
    • (0 jobs)
    Linkedin Looking forward to a challenging career in the IT industry as a Software Developer. If given an opportunity, I will put my best foot forward with complete commitment to fulfill my obligations and pursue the goals and demands of my job.
    Featured Skill API Development
    React Native
    React
    Vue.js
    NodeJS Framework
    Apache Kafka
    Redis
    AngularJS
    Web Services Development
    MySQL
    Docker
    PHP
    Laravel
    Amazon Web Services
    System Administration
  • $30 hourly
    • 5.0/5
    • (4 jobs)
    I am an Engineer who has multidisciplinary experiences and is expert in Big Data Processing and API Development. I am experienced in creating and implementing scalable data architectures, developing and optimizing ETL (Extract, Transform, Load) processes, and ensuring data quality and integrity. I am also experienced in developing APIs and providing the best solutions for the tech problems.
    Featured Skill API Development
    Kotlin
    Google Cloud Platform
    Amazon Web Services
    Rust
    Spring Boot
    Apache Flink
    Docker
    Elasticsearch
    Apache Airflow
    SQL
    Python
    Scala
    Java
    Apache Spark
  • $60 hourly
    • 0.0/5
    • (0 jobs)
    A dynamic software and data professional with expertise in data science, machine learning, and full-stack development. I bring hands-on experience building AI-powered applications, deploying ML models as APIs, and integrating data pipelines with scalable web platforms. My work spans backend systems, frontend development, cloud architecture, and data engineering—making me well-suited for cross-functional projects. I’m fluent in multiple languages and frameworks, and comfortable working in agile, remote teams. KEY COMPETENCIES 1. FULL-STACK DEVELOPMENT JavaScript (React, React Native, Next.js), Node.js, Express.js Python (backend scripting, data tasks) HTML, CSS, Bootstrap, WordPress, Webflow 2. DATA SCIENCE & MACHINE LEARNING Python, R, SQL/PostgreSQL TensorFlow, Scikit-learn, Pandas NLP: SpaCy, NLTK, Snorkel, Skweak Tableau (dashboards & data visualization) 3. WEB BACKEND & DEPLOYMENT REST APIs: FastAPI, Django DevOps & Automation: Git, Docker, Selenium, Playwright Cloud & Data Integration: AWS Lambda, Apache Airflow, Talend, Snowflake, Pentaho, MongoDB, Supabase
    Featured Skill API Development
    Docker
    PostgreSQL
    Talend Data Integration
    Apache Airflow
    Tableau
    Natural Language Processing
    TensorFlow
    Machine Learning
    Data Extraction
    ETL Pipeline
  • $45 hourly
    • 5.0/5
    • (3 jobs)
    I am a dedicated software developer based in Germany with a strong passion for crafting innovative solutions. With extensive experience in designing and developing complex software systems, I take pride in delivering high-quality results to my clients. Throughout my career, I have successfully led projects from inception to final delivery, ensuring seamless execution and exceeding expectations. My proficiency in various programming languages and technologies allows me to tackle diverse challenges and provide efficient, scalable solutions. ⭐======Expertise======⭐ 👉 Native Mobile App Design and Development [iOS - Swift/Obj-C, Android - Java, Kotlin] 👉 Cross-Platform Mobile App Design and Development [React Native - JS/TS, Flutter - Dart] 👉 Embedded IoT Software Solutions [Nordic - nRF, Arduino, Raspberry Pi, STM, ESP] 👉 Web Frontend Development [React, Vue, Next, Angular, Nuxt] 👉 Web/IoT Backend Development [Node.js, Django, Flask, Serverless Stack] 👉 Virtual Team Formation and Coordination ⭐======My Services======⭐ 👉 Custom Mobile and Web UI/UX designing services (Figma, Zeplin, Adobe Photoshop, Adobe Illustrator) 👉 Native Mobile App Development (iOS, Android) 👉 Cross-Platform Mobile App Dev (iOS, Android) 👉 Fullstack Web Development 👉 Embedded IoT Software Solutions (Firmware, Web, Backend) 👉 Develop and implement testing strategies for software products (E2E Testing, UI Testing, Unit Testing, Selenium, Jenkins, Github Actions, XCTest, XC UITest, JUnit, Appium, Detox, Espresso, Fastlane, CircleCI) 👉 Build software products from ideation to MVP and beyond 👉 Revive, update or fix existing software solutions in need of care and feeding 👉 Custom integrations in pre-existing software products 👉 Get previously stalled software development efforts over the finish line 👉 Perform code reviews Listed below are some of the technologies/tools keywords that I have had experience working with: React, React Native, Angular, Tailwind, Bootstrap, Material UI, Web3, Xcode, Android Studio, VSCode, IntelliJ, Github, Gitlab, Jira, Slack, Azure, AWS, GCP, Firebase, Agile, Scrum, Node.js, Django, Next.js, Vercel, Heroku, Netlify, Serverless Stack, MERN Stack, MEAN Stack, E2E Testing, UI Testing, Unit Testing, Selenium, Jenkins, Github Actions, XCTest, XC UITest, JUnit, Appium, Detox, Espresso, Fastlane, CircleCI, Figma, Zeplin, Adobe Photoshop, Adobe Illustrator, Dart, Kotlin, Swift, C/C++, Obj-C, Go, Swift, Meteor.js, Laravel, PHP, RoR, Python, Java, Javasript, Typescript, SCSS, CSS, HTML, Mongo DB, SQLite, MS-SQL, MySQL, Postgres DB, Cockroach DB, Dynamo, Firestore, Firebase Realtime DB, Redis, Amazon RDS, Realm, Redux, Saga I look forward to an introductory call to discuss how I can help your business grow. You can book a call here: calendly.com/blah_mad/30mins
    Featured Skill API Development
    Web Development
    Mobile App
    Firmware
    Raspberry Pi Firmware
    Embedded Application
    Internet of Things Software
    Custom App
    Back-End Development
    Data Science
    Front-End Development
    Apple Xcode
    Android App Development
    Push Notifications
    Mobile App Development
    iOS Development
    Swift
    iOS
  • $100 hourly
    • 0.0/5
    • (0 jobs)
    A highly skilled Senior Software Engineer with 12+ years of experience in software development on a web platform. I have expert knowledge and experience in building complex systems from scratch. I like to design clear and flexible architecture with the use of a modern tech stack. For the front-end, I prefer to use ES6+, Typescript, and modern frameworks like Vue, React, and Angular. For the back-end, I prefer to use SOLID, DDD, and Clear architecture and sometimes microservices. I do not have strong preferences for programming languages and paradigms, because I am a fast learner and always looking forward to expanding my experience. I like to bring high standards to the codebase and use modern technologies with oop/functional programming. I have experience in leading small dev teams in an office (up to 5) or remotely (up to 8) and prefer to work remotely.
    Featured Skill API Development
    Team Management
    Front-End Development
    PHP
    Full-Stack Development
    TypeScript
    SCSS
    Docker
    React
    JavaScript
    NestJS
    Node.js
    SQL
    Vue.js
    Angular
  • $25 hourly
    • 0.0/5
    • (1 job)
    I specialize in building reliable AI-powered assistants to streamline delivery orders for restaurants. My chatbots integrate seamlessly with platforms like WhatsApp, Instagram, and Messenger, helping restaurants automate order-taking, reduce errors, and boost productivity. What I Offer: Custom Chatbot Development: Personalized bots that handle delivery orders and improve customer experience. AI-Powered Efficiency: Integration of AI tools for dynamic menu handling and conversation management. End-to-End Service: From planning, development, to deployment, I ensure a smooth and hassle-free process. My Skills: Tech Stack: Python, LangChain, LangGraph, React, JavaScript, and database integration. Experience: Over a decade in IT, project management, and programming. Languages: Fluent in German, Spanish, English, and French – I can develop solutions tailored for diverse markets. Let’s automate your order process and take your restaurant’s efficiency to the next level!
    Featured Skill API Development
    Java
    Database
    React
    Python
    LangChain
    Web Application
    Artificial Intelligence
  • $30 hourly
    • 0.0/5
    • (0 jobs)
    Senior Backend Developer with 13+ years of experience designing, building, and scaling high-performance backend systems. Expertise in Ruby, Elixir, and message processing pipelines. Proven track record of elivering scalable, maintainable solutions through sound system design, database optimization, and stakeholder collaboration. Passionate about mentoring, technical excellence, and impactful engineering. Technologies, Languages * Languages: Ruby, Elixir, Python * Databases: Postgres, MySQL * Messaging & Streams: Kafka, RabbitMQ, Google PubSub * DevOps: Kubernetes, Terraform, Docker, CircleCI, GitHub Actions, GCP * Monitoring: Datadog, Grafana, NewRelic * ML/Data: Pandas, scikit-learn, image classification, neural networks
    Featured Skill API Development
    RabbitMQ
    Apache Kafka
    PostgreSQL
    Docker
    Unit Testing
    Web Development
    Google Cloud Platform
    Kubernetes
    Python
    Elixir
    Ruby
  • $85 hourly
    • 0.0/5
    • (0 jobs)
    I'm a senior backend developer with a focus on building fast, reliable systems using Go and PostgreSQL. I care deeply about performance, clean architecture, and writing code that scales. Whether it's optimizing SQL queries or designing APIs that can handle real load, I enjoy solving hard problems and keeping things simple.
    Featured Skill API Development
    API
    Performance Optimization
    SQL
    PostgreSQL
    Golang
    Database
  • $45 hourly
    • 0.0/5
    • (0 jobs)
    I am a developer with experience in building web apps/websites for small and medium-sized businesses. Also, I've been working for a couple of years on mobile apps development using cross-platform and native frameworks. I'm experienced in HTML, CSS, and Javascript (including frameworks and libraries such as React, and Angular ). I'm also experienced with building / documenting / testing and integrating API's. I can fully manage a project from start to finish with a continuous delivery approach, taking into consideration the importance of a regular communication I am an open-minded and a friendly person who not looking only to work as much as to make good and professional relationships with the project owners
    Featured Skill API Development
    API Testing
    API Integration
    API Documentation
    TypeScript
    Node.js
    React
    React Native
    Responsive Design
    JavaScript
  • $10 hourly
    • 0.0/5
    • (0 jobs)
    Junior Software Engineer The desire to pursue my passion for programming and further develop professionally motivated me to transition my career from management into software development. My enthusiasm for technology has been with me for a long time, and in recent years I have already implemented several projects both as part of a team and independently, including backend development using Java and Spring Boot, as well as frontend projects with React. My experience in management has strengthened my self-discipline and multitasking skills, allowing me to efficiently coordinate multiple tasks. I have also learned to work in agile teams with flat hierarchies, which has greatly enhanced my adaptability and collaboration skills.
    Featured Skill API Development
    Spring Boot
    RESTful API
    Java
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