Hire the Best Physicists
in Spain

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Pere R.

Manacor, Spain

$30/hr
5.0
2 jobs

Astrophysicist/Cosmology PhD student specialized in Python-based modeling, Bayesian inference, and scientific visualization and communication. I build reproducible, well-documented pipelines and publication-quality visuals. Published first-author work in Q1 journals with publicly released open-source code developed in Python.

  • Physics
  • Data Analysis
  • Machine Learning
  • Information Analysis
  • Python
  • TensorFlow
  • Data Science
  • Time Series Analysis
  • SQL
  • Data Visualization
  • Bayesian Statistics
  • Remote Sensing
  • Climate Science
  • Astrophysics
  • Blender
Cesar P.

Barcelona, Spain

$50/hr
4.9
262 jobs

Hello, there! If you’re dealing with manual processes, broken integrations, or repetitive tasks — I help you automate them fast using Python and AI From scraping data to building APIs and AI workflows, I focus on solutions that save time and reduce operational costs I’m a senior developer with 10+ years of experience building backend systems, automation pipelines and AI-powered tools ➡️ I don’t just write code — I solve bottlenecks Here’s how I can help: ✔ AI Automation (OpenAI, LLMs, custom workflows) ✔ API Development & Integrations (FastAPI, Django, REST) ✔ Web Scraping & Data Extraction (Playwright, Selenium) ✔ Python Automation Scripts (data processing, bots, workflows) ✔ Backend Systems & Data Pipelines ✔ Replacing manual work with scalable automation Typical projects I work on: • Automating repetitive workflows (saving 10–20h/week) • Building scraping systems for leads, pricing, or research • Connecting tools via APIs (CRMs, dashboards, internal tools) • Creating AI-powered assistants or internal copilots • Cleaning and processing large datasets automatically What you get working with me: • Fast execution — I focus on delivering working solutions quickly • Clear communication — no over-engineering or unnecessary complexity • Practical approach — I prioritize results over theory • Reliable delivery — I only take projects I can complete 100% Tech stack: Python, FastAPI, Django, APIs, OpenAI, LLMs, Playwright, Selenium, PostgreSQL, automation workflows If you have a task that needs to be automated, fixed, or built quickly — send me a message with the details and I’ll tell you the best way to approach it -- Relevant Experience: • Built and deployed backend systems and web platforms using Python (Flask, Django), including authentication, file handling, and production-ready deployments • Developed and integrated machine learning platforms (model serving, file upload/download workflows, user access control) • Created and managed NFT marketplaces and smart contract-based systems (Ethereum, Polygon) • Worked on blockchain integrations and DeFi-related platforms, including token systems and swap solutions • Implemented API integrations and automation workflows across multiple client projects • Delivered multiple web development projects (dashboards, portals, internal tools) with real business usage • Provided consulting and support on integrations (e.g., DocuSign workflows and API usage) • Experience stabilizing and deploying production systems for clients Track Record: • 200+ completed jobs on Upwork • Delivered projects ranging from quick scripts to full platforms ($500 – $3,000+) • Long-term client collaborations across multiple years • Strong focus on reliability, communication, and delivery More experience: - Delivered AI-powered features (RAG pipelines, vector search) used in production by enterprise users - Built scalable backend systems with Python (FastAPI, Django, PostgreSQL) deployed in cloud environments (Azure, AWS) - Led full system refactors to production-grade architecture, improving performance and maintainability - Developed fullstack applications (React, Next.js, TypeScript) integrated with backend APIs for real-world business workflows • Built and maintained SaaS platforms (fund management tools), delivering end-to-end features from backend to frontend - Designed REST APIs and data models with PostgreSQL for scalable applications - Delivered high-impact fixes in production systems affecting hundreds of users under tight deadlines - Acted as CTO and lead engineer, defining architecture and technical strategy for Web3 and SaaS platforms - Improved application performance up to 5x through optimization and frontend architecture redesign - Built serverless systems using AWS (Lambda, S3) and scalable backend architectures - Led teams of 20+ developers, improving delivery processes and engineering standards - Reduced API response times from 30s to <5s through optimization and system redesign - Designed and implemented AI-powered systems including LLM integrations and GenAI workflows - Co-founded and led development of custom software solutions (web apps, APIs, blockchain, automation systems) - Delivered projects across industries including SaaS, blockchain, and data-driven platforms - Taught Python, UX/UI, and fullstack development, helping students build real projects and achieve job placements AI, ML, artificial intelligence, machine learning, deep learning, neural networks, finetuning, model finetuning, AI training, supervised learning, unsupervised learning, reinforcement learning, chatbot integration, conversational AI, AI development, scalable AI systems, spec driven development, AI optimization, prompt engineering, LLM integration, full-stack development, front-end development, back-end development, API design, artificial intelligence integration, AI automation, workflow automation, Zapier, Make, n8n, AI pipeline integrations, data pipelines, AI process integration

  • English
  • Web Development
  • Smart Contract
  • Blockchain
  • Ethereum
  • API
  • Solidity
  • C#
  • API Development
  • RESTful API
  • RESTful Architecture
  • Tutoring
  • Django
  • Python
Tomás R.

Ourense, Spain

$120/hr
4.5
133 jobs

CURRENTLY RETIRED. PLEASE DO NOT SUBMIT, I AM NOT AVAILABLE FOR HIRE AT THIS MOMENT. Physicist specialised in Electromagnetism and Electronics, working like RF&MW engineer from 1989, designing, developing and manufacturing High Frequency devices and products. With a large industrial experience. My main skills are the antenna design, amplifiers, filters, mixers and complex RF systems. Experienced user of simulation tools like ADS, AWR, LTSpice, PSPICE, EM simulators like HPMomentum, FEM, Axiem, CST, HFSS and COMSOL Multiphysics, and PCB design tools like Altium, Eagle, OrCAD, Design Spark, etc.. Equipped with a complete laboratory for prototyping, manufacturing, testing and checking. Services I offer: - RF&MW and industrial consultancy. - Design and development of Electronics products. - Fast Prototyping and Testing. - Technical Reports and Feasibility Studies. - Asistance and support in papers, thesis, essays and scientific publications.

  • Physics
  • Engineering Simulation
  • Hardware Prototyping
  • 3D Modeling
  • Antenna Design
  • Analog Electronics
  • Circuit Design
  • Amplifiers & Filters
  • Digital Electronics
  • RF Design
  • RF Microwave Design
  • Electrical Layout Design
  • PCB Design
  • Antenna Testing

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