Hire the best API Integration Freelancers in Barcelona, ES

Check out API Integration Freelancers in Barcelona, ES with the skills you need for your next job.
Clients rate API Integration professionals
Rating is 4.8 out of 5.
4.8/5
based on 102 client reviews
  • $60 hourly
    - Business intelligence expert with a strong background in data analytics. - Skilled in developing interactive Power BI dashboards and integrating data sources, including API integration. - Proficient in managing complex Data Analytics projects across various sectors (IT, Retail, Construction, Energy, Pharmaceuticals, and E-commerce). - Experienced in using DAX, Power Query, SQL, Snowflake, Databricks, Phyton, SaaS APIs to create customized solutions for specific project needs. - Proven track record of implementing data-driven strategies, resulting in increased customer retention rates, revenue growth, and cost reduction. CLIENT CASES Data-driven Decision Making: Leveraged data analytics expertise to assist a pharmaceutical client in identifying key customer segments. Developed interactive Power BI dashboards, integrating data sources from sales, website traffic, and social media APIs. Resulted in a 20% increase in customer retention and 15% revenue growth. Streamlined Inventory Management: Managed a complex data analytics project for a construction company. Created customized solutions using DAX, Power Query, and Snowflake to track supplies and equipment. Led to a 30% reduction in inventory carrying costs and improved project efficiency. E-commerce Sales Optimization: Utilized Python and SaaS APIs to analyze sales data for an e-commerce client. Developed dynamic pricing algorithms, leading to a 25% increase in online sales and enhanced customer satisfaction. Can provide a portfolio of detailed reference projects upon request.
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    Microsoft Power BI Development
    Analytics
    API
    KPI Metric Development
    Microsoft Power BI Data Visualization
    Microsoft SQL Server
    Data Integration
    Power Query
    Data Visualization
    Data Analysis Expressions
    Business Intelligence
    Data Analysis
    Dashboard
    Microsoft Power BI
  • $35 hourly
    Developer specializing in Google Apps Script and Google Workspace APIs (Drive, Gmail, Sheets, Docs, Calendar, Admin SDK, Tasks). I'm fairly active in Stack Overflow, you can visit my profile in order to see my activity. Stack Overflow username: Iamblichus
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    Google Apps Script
    Data Scraping
    Apps Script API
    Scripting
    Google Sheets
    Node.js
    JavaScript
    Python
  • $70 hourly
    Full stack JavaScript and Typescript Developer with more than 10 years of experience My experiences range from building responsive sites that work well cross-browser to building scalable sites for the financial services industry. I like working on projects with a team that cares about creating beautiful and usable interfaces. I'm flexible with my working hours and i am happy to work closely with any existing freelancers you work with. Client side: - JavaScript - VueJS - Vue3 - Vuex - React - Angular - RxJs - HTML 5 - CSS - SASS - Qwik - Tailwind CSS - Bootstrap Server side: - Node.js (Express, Sails.js) - MySQL, - MongoDB, - NuxtJS - Nuxt Certification - WebSockets Other: - Mixpanel - Issue tracking: JIRA, Trello - VCS: GIT (Bitbucket, Github, Gitlab), SVN - Documentation: Github/Redmine Wiki - Notion
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    Code Refactoring
    TypeScript
    Web Application
    Web Development
    SEO Performance
    Mixpanel
    React
    Node.js
    Angular
    Vue.js
    JavaScript
    Nuxt.js
    Serverless Stack
    API
  • $65 hourly
    Software Engineer. +5 years working with Startups going from idea to product and scaling the codebase, the companies I have worked with have raised more than $10M combined. I'm an experienced full-stack developer focused on delivering quality products fast, I have worked hand-in-hand with founders to develop new features, improve product-development speed and deliver products with a pragmatic approach. When I design software I focus on maintainability and fast iterations, prioritizing modular design(even if it is a monolith). To me, a fast time to respond is better than 100 tests before seeing the feature live. Previously I was the Founding Engineer at myauthenticwallet.com where I helped the founder get from MVP to a product that landed 4 customers and $2M in funding.
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    Slack
    Next.js
    React
    React Native
    TypeScript
    Electron
    Front-End Development
    Full-Stack Development
    AWS Lambda
    Django
    JavaScript
    Python
    AWS Development
    Web Design
  • $50 hourly
    Diligent Software Engineer with 5 years of experience in a fast-paced environment. Has solid theoretical educational background in mathematics along with a proven track record of practical experience. Mostly skilled with Linux, Python, Django, FastAPI, PostgreSQL, Docker, AWS. My experience and kills: ✓Mathematics ✓Linux ✓C ✓AWS ✓PostgreSQL ✓Docker ✓Python ✓Flask ✓Django ✓Javascript ✓RESTful APIs ✓Microservices ✓ORM (object relational mapper) libraries ✓Git ✓Strong debugging skills ✓Database schemas that represent and support business processes I am open to discussion and will be glad to hear from you soon.
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    Data Scraping
    JavaScript
    Python
    API
    jQuery
    Selenium
    Docker
    PostgreSQL
    RESTful API
    Flask
    Amazon Web Services
    Django
    Microservice
    C
  • $60 hourly
    🚀Magento Specialist with 5 Years of Hands-On Experience 🚀Over 12 Years of Invaluable Expertise 🚀Expertise That Adds Value 🔥Ready to elevate your business to new heights? I'm here to make it a reality! 🦾My areas of expertise include: • Tailoring and enhancing existing modules • Development of custom Magento modules • Design, layout, and template modifications • Seamless integrations with third-party systems • Customization of order, shipping, and payment methods • Expertise in NAV Business Center Integration with Magento 🏅What sets me apart? Besides my technical proficiency, I pride myself on out-of-the-box thinking, providing innovative and customized solutions to address your unique business challenges. I ensure easy and open communication throughout our collaboration. ✅My mission is clear — to help clients establish and expand their online presence. No project is too small or too large; I've successfully worked on everything from small static websites to the web infrastructures of multi-million dollar corporations. IF you require comprehensive website development, custom functionalities for your online business or any other eCommerce development needs, consider it done. 👉 Feel free to reach out to discuss your projects with me I'm always ready to bring a modern touch to your business requirements
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    Ecommerce Order Fulfillment
    Ecommerce Website Development
    Commerce Cloud
    Magento 2
    Magento
    JavaScript
    NGINX
    New Relic
    MySQL
    PHP
    Payment Gateway Integration
    WordPress
    Full-Stack Development
  • $90 hourly
    I’m an experienced Data Engineer and Data Scientist, specializing in the transition from Excel and manual data processing to modern and automated Business Intelligence platforms. My expertise spans the full spectrum of data engineering, from building robust data warehousing solutions using Snowflake and BigQuery to orchestrating efficient ELT pipelines with tools like dbt and Airflow. - Proficient in a range of modern data engineering technologies including dbt, Airbyte, and various business intelligence platforms. - Extensive experience leading projects to replace manual processes and scattered Excel data with cohesive, end-to-end business intelligence platforms. - Skilled in Python, enhancing automation and analytical capabilities for tailored data solutions. Effective communication and project management are pillars of my professional approach, ensuring transparency and collaboration from project inception to completion. My experience at Boston Consulting Group (BCG) has honed my abilities to drive significant data transformations for global clients.
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    AWS Development
    Terraform
    Data Integration
    Apache Airflow
    BigQuery
    Python
    Business Intelligence Software
    Data Warehousing & ETL Software
    Data Warehousing
    Snowflake
    dbt
  • $45 hourly
    Hey guys, I am Alex - founder of Springs 👋 Springs is a software AI development company and technical partner with 10+ years of experience. We help our clients achieve their business goals by delivering useful software, AI, and ML solutions through our cutting-edge knowledge. The Headquarters is located in Barcelona, Spain. Our services: 🔹Tech Consultancy 🔹Discovery Phase 🔹UI/UX 🔹Web development 🔹Mobile development 🔹AI/ML solutions 🔹DevOps 🔹Support and Maintenance Industries expertise: 🔸 Artificial Intelligence 🔸 Computer Vision 🔸 Education 🔸 FinTech 🔸 Logistics & Transportation 🔸 Sales & Marketing 🔸 Retail 🔸 Real Estate Why Springs? 🔷 Honesty is our priority. We believe that trust is a key point for a long-term and successful partnership. 🔷 We make a deep Discovery phase before starting any project making sure we have a full vision of what should be delivered. 🔷We use standardized security practices & requirements during the development and quality assurance phases. Our Approach: 🔸Our experts employ globally recognized best practices to thoroughly analyze the market and business objectives, providing a comprehensive perspective for each project. 🔸Our engineers leverage their profound knowledge of AI, ML, mobile, data, and cloud solutions to create cutting-edge digital products that drive business enhancements across various industries. 🔸Our delivery approach is customized to breathe life into transformative digital enhancements. We meticulously guide each project through a comprehensive application development process. 🔷Technologies we use: • Javascript • MERN, MEAN • Node, Express, Sails, Nest, Next, Nuxt • React, Redux, Babel, Vue, GatsbyJS, Angular, AngularJS • Typescript • React Native, Dart, Flutter, Swift, Kotlin, iOS, Android • Python, Django, Fast API, Pandas • Pytorch, TensorFlow, Keras, Whisper, OpenCV • Langchain, Pinecone, ChromaDB • GPT 3, GPT 3.5, GPT 4, OpenAI, LLaMA, Google Bard, T5, Roberta • DALL-E, MidJourney, Stabble Diffusion, Hugging Face • NNs, RNNs, LSTM • XGBoost, LightGBM, CatBoost • Proximal Policy Optimization (PPO), DDPG, Q-Learning • OpenAI Codex, Google AutoML, DataRobot • ROS (Robot Operating System), IBM Watson, CLIPS • Linear Regression, Decision Trees, SVM • YOLO, Faster R-CNN, Mask R-CNN • DeepSpeech, Jasper, Kaldi, XLNet, T5, ERNIE • ChatGPT integration • GraphQL • Socket.io • Amazon Connect, MWS, AWS, EC2, S3, Lambda, DynamoDB • Firebase, Google Filestore • MySql, PostgreSQL, MongoDB, MariaDB • Progressive Web Applications (PWA) • Stripe API, Paypal API, Google Maps API, Mapbox API, OpenAI API • Docker, Kubernetes Our Behance profile: behance.net/m_i_a_t_e_r_i_o Springs cares about code styling, modern standards, and the productivity of the project implementation. That is why we do constant code reviews, modifications, and automation tests to ease the app release as well as possible. At the same time, our Team Leads and CTO are always ready to mentor, help and support our talented developers. They also provide on-demand tech consultancy to our partners to find the best mobile or web app development approach for the concept. The product quality is our top priority, We always start with proper architecture planning, database structuring and other preparations for further app development and timely delivery. By the way, we do compulsory code investigations. If we work with the existing code written by other devs/teams we always check if there is a possibility to use it. We don’t just focus on the app development process but we think about the future. We support the most data-driven scopes like logistics and retail accelerating their digital transformation. So whether you need a custom mobile ERP or eCommerce web development we’re the right guys to outsource your project to. Keywords that you can use to find us: User Interface, User Experience, Design Thinking, Interaction Design, Designer, UI, UX, Web-design, Mobile Design, Mock-up, Design Expert, Design Gugu, App Design, Application design, platform design, Adobe, Photoshop, Illustrator, Graphics, Graphic Design, Visual Design, Creative, Material Design, Guidelines, Android, iOS, Desktop, iPhone, Application, Usability, Website, Logo, Logotype, Responsive, Adaptive, Website Prototyping, Wireframe, Update, Solutions, Long term, Effective, Productive, Experienced, Job, SAAS, Hire, Team Leader, Testing, A/B Testing, Sketch, Advertising, Branding, Agency, Identity, Identity, Design Thinking, Management, Art Director, Head of Design, Search, Digital, Landing, Promo, Redesign, Developing, Creation, Page, Corporate, IT, Tech, Technology.
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    Chatbot Development
    TensorFlow
    Natural Language Processing
    Node.js
    Data Science
    Deep Learning
    API
    Web Development
    ChatGPT
    Machine Learning
    Artificial Intelligence
    Python
    React
    JavaScript
  • $15 hourly
    I am deeply passionate about the startup ecosystem, and a couple of years ago, I embarked on a journey of self-studying web development. Throughout this period, I have honed my skills and embarked on various projects as an independent creator, notably as a subtitle editor for videos with my product 'NOMI'. A few months back, I co-founded a web development agency alongside a talented designer friend, catering to a range of small-scale clients. During this journey, I have significantly enhanced my proficiency in frontend development, specializing in frameworks like Next.js, while also bolstering my backend skills, particularly in Node.js and Django. Moreover, I have delved into the realm of design using tools such as Figma. Additionally, I have acquired proficiency in utilizing non-coding platforms like WordPress and Wix. My relentless pursuit of knowledge and hands-on experience has empowered me to offer comprehensive solutions and deliver high-quality results to clients.
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    Google Ads
    Next.js
    CSS
    HTML
    Python
    Back-End Development
    Figma
    JavaScript
    Front-End Development
  • $25 hourly
    🚀 Need an Automation expert with deep business sense and technical ability? 👋🏼 Hi, I'm Nico. I specialize in building efficient workflow systems for agency owners and freelance service providers, helping you break through the 5 to 6-figure ceiling. No fluff - just efficient hands-off systems for growth hacking. 📈 Back in 2017, I launched my first agency. It grew quickly, but I hit a wall and was burned out within 18 months. I took those lessons and started a second agency, this time with a focus on efficient systems, workflows, and process quality controls. This approach led to rapid scaling and practically works on autopilot many years later. Now I apply my expertise to help other agencies and freelancers achieve success by optimizing their processes and implementing advanced automation systems. 🔑 Key Skills and Services: 1. Comprehensive Workflow Automation ⚙️ Process mapping of your Agency or Freelance Service - Gain MASSIVE clarity on your business. Custom workflows designed for your unique business needs - I will provide ideas to better streamline your services based on battle-tested Agency best practices. Long-term solutions that scale with your business. 2. Seamless System Integrations 🔗 Integrate various platforms to ensure smooth data flow. Expertise in API connections and custom integration solutions. Track payments entries, client bookings, new client onboarding, etc. 3. Expert CRM and Marketing Automation 📣 Optimize CRM systems for better client management. Implement email marketing tools for targeted campaigns. 🚀 Specializations Project Management & Collaboration: ClickUp, Monday.com, Trello CRM & Sales: Salesforce, HubSpot, Zoho, Pipedrive Automation & Integration: Zapier, Make (Integromat), Power Automate Email & Marketing Automation: ActiveCampaign, Mailchimp, HubSpot, MailerLite API Development: Custom API solutions, AWS, Google Cloud Platform 📈 Client Success Stories: My clients have experienced transformative improvements – from streamlined operations to enhanced client management, leading to significant growth and efficiency gains. My tailored automation solutions have helped agencies save time and increase profitability. "Working with Nico has been a pleasure since day 1 - he's the kind of person to propose solutions beyond what's required. Thank you!" - Alex, Agency Owner. "Before I started with Nico, my Freelance business was killing me. Too many emails, lost followups, forgotten meetings, etc. In one month we set up ClickUp and his automations and the changes have been dramatic. I focus on my zone of genius now and have increased revenue as a result. THANKS!!" Sara, Freelance Image Consultant 📅 Let's Connect: Ready to elevate your business with expert automation and integration? Schedule a consultation with me today. Let's win together 🥇 Nico Automation & Integration Expert for Agencies and Freelancers. P.S. If this Bio reasonates with you, Reach Out - You're one step away from massive growth and clarity on your systems.
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    MySQL Programming
    Microsoft Power BI
    Microsoft Power Automate
    CRM Automation
    Zapier
    Make.com
    System Automation
    Automation
    Business Process Automation
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