GIS Analyst with +4 years of experience and a strong academic background in Earth Science and Environmental Engineering, complemented by professional experience in the renewable energy sector. I specialise in delivering practical, data-driven solutions to complex geospatial and environmental challenges. My expertise includes:
๐ Environmental Management, Monitoring, Impact Assessment and Reporting
๐ Geospatial Analysis
๐ฐ๏ธ Remote Sensing
๐บ๏ธ Cartography & Map Production
๐ Python
I am dedicated to delivering high-quality, efficient solutions with a strong analytical and organisational approach. Let's discuss how I can contribute to your next project!
Feel free to reach out, I look forward to collaborating!
QGIS
ArcGIS
R
Spatial Analysis
Georeferencing
Remote Sensing
Risk Analysis
Google Earth
GIS
Graphic Design
Indias F.
Lisbon, Portugal
$35/hr
5.0
4 jobs
I build intelligent systems โ not scripts, not one-off fixes, not half-baked automations.
If you need someone to think, architect, integrate, and deliver a system that genuinely improves your business, this is where I operate.
I specialize in designing and implementing AI-powered automation ecosystems that combine:
โข Python & FastAPI for custom backend logic
โข n8n to orchestrate workflows with reliability
โข API integrations (Stripe, Binance, Supabase, HubSpot, Notion, ClickUp, custom CRMs)
โข LLM agents for insights, analysis, decision-making
โข Financial & trading logic (execution engines, risk management automation)
โข Dashboard systems for clarity (React, Tailwind, shadcn)
What I Actually Build
โข Real-time execution engines (trading, financial, operational)
โข Automation systems that replace full teams
โข AI agents that deliver insights and decisions weekly
โข Data pipelines + workflow orchestration
โข Intelligent dashboards for business clarity
โข End-to-end custom platforms (FastAPI + React)
Why Clients Hire Me
Because I donโt just โbuild tasks.โ
I design the system behind the system.
You get:
โข architecture
โข reliability
โข long-term design
โข clarity
โข communication
โข no bullshit execution
Technical Stack
Python, FastAPI, PostgreSQL, Supabase, SQLAlchemy
n8n, Zapier, Make
React, Next.js, Tailwind, shadcn/ui
OpenAI, local LLMs, agent frameworks
CCXT, Binance API, execution pipelines
Docker, Linux servers, CI/CD
If you need:
โข a system that makes money
โข a system that saves money
โข a system that gives clarity
โข or a system that runs without humans
Iโm the person you build it with.
Send me a message with your objective and Iโll tell you whatโs possible.
Python
Web Design
Bot Development
Trading Automation
Database Development
Coding Lesson
API Integration
Business Consulting
Data Science
Data Scraping
Arthur S.
Guimaraes, Portugal
$50/hr
5.0
23 jobs
I build complete products end to end, solo: PostgreSQL schema, typed API (tRPC), React or React Native frontend, AWS infrastructure as code, keyless CI/CD, custom domain, and TLS. 6+ live products run on a serverless platform I designed and reuse, and my recurring infra bill trends toward $0 by deliberate cost engineering: a documented S3-outbox relay pattern that replaces NAT gateways, free-tier tuning, and Durable Object hibernation.
I am also an AI/LLM engineer in the strong sense: multimodal apps (vision + voice + RAG with pgvector), multi-provider orchestration (Anthropic, OpenAI, Gemini), LangGraph agents, LLM-as-judge evals, and an open-source agent framework I built on the Claude Agent SDK + Model Context Protocol: 20 agents, 47 skills, and 10 MCP tools that autonomously design, implement, and verify code behind human gates.
Donโt trust the portfolio. Test me. Two ways:
1. AI briefing pack. Ask me for it, paste it into your own ChatGPT or Claude, and let YOUR AI evaluate my credentials. It is distilled from an automated audit of 26 of my real repositories and includes what I am still improving, because an honest document is more useful to you than a polished one.
2. Prompt challenge, free, one round. Send me a realistic prompt from your project: feature spec, bug report, or architecture question. I return the output of my AI-assisted workflow plus my human review: what I kept, what I corrected, and why. You judge the result and the judgment.
Stack keywords: TypeScript, React 18/19, Next.js, Expo/React Native, tRPC, Drizzle, PostgreSQL, Supabase, AWS (Lambda, SAM, API Gateway, RDS, DynamoDB, CloudFront, Cognito), Cloudflare (Workers, Durable Objects, Pages), GitHub Actions OIDC, Clerk, LangGraph, Claude Agent SDK, MCP, RAG, Godot 4, n8n, Make, Zapier.
Portfolio item blurbs
Xenodot Forge (open source, MIT) = AI game-dev framework on the Claude Agent SDK + MCP: a human-gated design โ implement โ verify agent pipeline (20 agents / 47 skills / 10 MCP tools, ~14.7k LOC) driven from a WebSocket UI, with a verification-first quality gate (headless engine checks, zero-warning lint, CI-enforced validators). Used it to build a playable cross-platform 3D FPS in Godot 4.6. Available on my GitHub.
Probius.app (live EdTech) = Study platform for the Brazilian OAB bar exam. React + Vite SPA on S3/CloudFront, Lambda + tRPC + Drizzle + PostgreSQL, NAT-less VPC posture with all outbound AI/email traffic via an S3-outbox relay, deployed exclusively through keyless GitHub Actions OIDC.
Multimodal AI mobile app (~28k LOC) (3itch ai) = Fashion-critic app: Expo client, tRPC-on-Lambda backend, Cloudflare Durable Objects realtime engine. Vision (Gemini), persona brain (GPT-4o), voice in/out (Whisper + TTS), wardrobe RAG (pgvector), per-user AI spend caps, offline RS256 JWT verification on both backends, and gitleaks in CI.
Production e-commerce (~31k LOC) = Luxury-furniture platform: Next.js 16 SSG storefront, React admin SPA, serverless API, and one PostgreSQL backend. Infra cost cut to ~$0 with the S3-outbox relay pattern, plus a single-query JSONB product search function that eliminates N+1 fetches.
Multi-tenant PMS + OTA sync = Vacation-rental management system with Channex integration to Airbnb and Booking: idempotent booking sync, SQS worker queue, EventBridge polling, and a 12-scenario automated certification suite.
Prompt Challenge
I will run your prompt through my AI engineering workflow and hand you the reviewed output.
Description: Send me one realistic prompt from your project: a feature spec, bug report, refactor, or architecture question. I run it through my AI-assisted workflow, using the same agent tooling I open-sourced, and deliver: (1) the raw output, (2) my line-by-line human review marking what I kept, what I corrected, and why, and (3) a short note on how I would productionize it. This shows you what you are actually hiring in 2026: not โcan he prompt an AI,โ but โcan he judge, correct, and ship what the AI produces.โ First round free on invite.
Python
Management Skills
Product Development
Salesforce
Agile Project Management
Software Development
Jenkins
Zapier
Make.com
Airtable
AWS Development
DevOps
AI Consulting
Node.js
XML
SOAP
Apex
Salesforce CRM
Agile Software Development
Viktor S.
Funchal, Portugal
$59/hr
5.0
37 jobs
I'm Penetration Tester & Cybersecurity Consultant with 8 Years of Experience. I have been recognized as a Top Rated Plus freelancer on this platform๐ฅTake a look at my full profile to discover how I've helped clients secure their products and meet compliance goals.
If you're looking to identify vulnerabilities before attackers do, strengthen your security posture, or meet compliance requirements, you're in the right place.
Here's how I help businesses stay secure:
๐ก๏ธ Penetration Testing. End-to-end security testing for Web applications, APIs, Mobile apps, and Infrastructure. You'll receive a comprehensive report with not just a list of findings, but clear remediation guidance your team can actually use.
๐ก๏ธ Cloud Security & Compliance Readiness. I review and harden your cloud infrastructure to help you confidently meet industry standards including ISO 27001, SOC 2, PCI DSS, HIPAA, and more, without the guesswork.
๐ก๏ธ Microsoft 365 / Google Workspace Security. A holistic assessment and hardening of your Microsoft 365 or Google Workspace environment, covering identity, access controls, email security, and data sharing settings, so your team can collaborate confidently without exposing common misconfigurations that put your data at risk.
Penetration Testing
Cloud Security
Cybersecurity Management
Website Security
Network Security
Application Security
Information Security
Vulnerability Assessment
Ethical Hacking
Security Assessment & Testing
Network Penetration Testing
Software Testing
Web App Penetration Testing
Static Testing
API Testing
Mobile App Testing
Beta Testing
Alpha Testing
Test Results & Analysis
Kali Linux
Luiz Alberto S.
Faro, Portugal
$20/hr
5.0
19 jobs
Full Stack Developer & BI Specialist | 5+ Years Building Data-Driven Solutions
I transform complex business challenges into scalable technical solutions, specializing in inventory management systems, ETL pipelines, and business intelligence dashboards.
Recent Impact:
- Built end-to-end inventory management system for CANNPRISMA using React, Node.js, Python, and SQL Server
- Designed ETL pipelines processing 1M+ records with Power BI dashboards driving business decisions
- Migrated banking infrastructure from GCP to AWS, improving system reliability
Core Expertise: Full-Stack Development | ETL & Data Engineering | BI Reporting | Cloud Architecture (AWS/GCP) | ERP Integration
Tech Stack: JavaScript, TypeScript, React, NextJS, Node.js, Python, SQL Server, Power BI, Docker, AWS
Python
JavaScript
React
Next.js
Gatsby.js
Cloudflare
Azure DevOps
Google Cloud Platform
Java
HTML
NodeJS Framework
AWS CloudFront
Unix Shell
C
Rui S.
Lisbon, Portugal
$80/hr
5.0
1 jobs
I'm a senior AI engineer with a decade of experience across applied AI, software engineering, and tech consulting. I work with private equity firms, venture capital funds, family offices, and asset managers โ both on the AI systems that automate their internal operations and as a forward-deployed engineer inside their portfolio companies.
I spent four years inside a โฌ600M B2B software fund, where I was the lead AI engineer responsible for shipping production AI systems that automated core fund workflows. Before that, I led digital transformation projects for large commercial banks at Deloitte Digital and KPMG.
๐๐๐๐ ๐ ๐๐๐๐๐
๐๐ง๐ญ๐๐ซ๐ง๐๐ฅ ๐๐ ๐๐จ๐ซ ๐๐ฎ๐ง๐๐ฌ ๐๐ง๐ ๐๐ฌ๐ฌ๐๐ญ ๐ฆ๐๐ง๐๐ ๐๐ซ๐ฌ. Unified deal intelligence over fragmented sources (decks, websites, CRM, email, transcripts), automated deal sourcing with thesis-aligned filtering, CRM action layers via MCP, and standardized investment memos generated from the corpus. These are the systems I developed and ran for 4 years inside an active investment team.
๐๐ฉ๐๐ซ๐๐ญ๐ข๐จ๐ง๐๐ฅ ๐๐ ๐๐จ๐ซ ๐ฉ๐จ๐ซ๐ญ๐๐จ๐ฅ๐ข๐จ ๐๐จ๐ฆ๐ฉ๐๐ง๐ข๐๐ฌ. The bottlenecks I worked on inside funds show up almost identically inside portfolio companies โ most often in logistics, manufacturing, procurement, and adjacent industries. The operational drag is the same: document-heavy processes where structured outputs turn unstructured text into useful data, and fragmented internal knowledge that needs RAG and function calling to be usable from inside chat or ERP-style interfaces.
I've delivered this work for regulated clients in financial services, so role-based access control, PII redaction, audit trails, and tenant isolation are baked into how I build.
๐๐๐๐๐๐๐๐
I deliver AI projects end-to-end, without hand-offs between strategy and implementation.
โข ๐๐ญ๐ซ๐๐ญ๐๐ ๐ฒ. Identify the AI opportunities that actually move a business metric. The job is to find the 20% that drives 80% of the outcomes.
โข ๐๐ฆ๐ฉ๐ฅ๐๐ฆ๐๐ง๐ญ๐๐ญ๐ข๐จ๐ง. Architect and ship the system. Production-grade, instrumented, evaluated, and integrated with existing infrastructure. Open-source-first to avoid vendor lock-in. Deployable on-prem or in the cloud depending on security and infrastructure constraints.
โข ๐๐ง๐๐๐ฅ๐๐ฆ๐๐ง๐ญ. Transfer capability to the in-house team so they can operate, extend, and own what we built.
๐๐ ๐๐๐๐ ๐๐ ๐๐
โข ๐๐ซ๐จ๐๐๐ฌ๐ฌ ๐จ๐ฏ๐๐ซ ๐ญ๐จ๐จ๐ฅ๐ฌ. AI engineering is still 80% systems engineering. The model is one of many moving pieces and rarely the right one to change first.
โข ๐๐ซ๐จ๐ฆ๐ฉ๐ญ ๐๐ง๐ ๐ฉ๐ข๐ฉ๐๐ฅ๐ข๐ง๐ ๐๐๐๐จ๐ซ๐ ๐๐ข๐ง๐-๐ญ๐ฎ๐ง๐ข๐ง๐ . Most teams reach for fine-tuning too early. The leverage almost always sits earlier.
โข ๐๐ซ๐๐ก๐ข๐ญ๐๐๐ญ๐ฎ๐ซ๐ ๐จ๐ฏ๐๐ซ ๐๐จ๐ฆ๐ฉ๐จ๐ง๐๐ง๐ญ๐ฌ. When the system is failing, the fix is usually in the architecture, not in the components. Better pipeline architecture beats swapping models or databases.
โข ๐๐ฏ๐๐ฅ๐ฎ๐๐ญ๐ข๐จ๐ง-๐๐๐ง๐ญ๐ซ๐ข๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ. Evals are how you turn a non-deterministic system into a reliable one. Without them, every prompt change is a coin flip and every regression goes undetected.
โข ๐๐ค๐๐ฉ๐ญ๐ข๐๐๐ฅ ๐จ๐ ๐๐ฎ๐ฅ๐ฅ๐ฒ ๐๐ ๐๐ง๐ญ๐ข๐ ๐ฌ๐ฒ๐ฌ๐ญ๐๐ฆ๐ฌ. A deterministic pipeline with LLM calls at specific steps beats a fully agentic system for most production problems. Map the process before adopting agentic flows.
๐๐๐๐ ๐๐๐๐๐
โข ๐๐๐ ๐จ๐ซ๐๐ก๐๐ฌ๐ญ๐ซ๐๐ญ๐ข๐จ๐ง: LangChain, LangGraph, CrewAI, Pydantic AI, LangFuse, LiteLLM, OpenAI and Anthropic SDKs.
โข ๐๐ญ๐ซ๐ฎ๐๐ญ๐ฎ๐ซ๐๐ ๐จ๐ฎ๐ญ๐ฉ๐ฎ๐ญ๐ฌ ๐๐ง๐ ๐ฏ๐๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง: Pydantic schemas as the contract between every LLM call and the rest of the system.
โข ๐๐๐ญ๐ซ๐ข๐๐ฏ๐๐ฅ ๐๐ง๐ ๐ฏ๐๐๐ญ๐จ๐ซ ๐ฌ๐ญ๐จ๐ซ๐๐ฌ: PostgreSQL with pgvector by default. Qdrant, Weaviate, Pinecone when the engagement warrants a dedicated store.
โข ๐๐๐ญ๐๐๐๐ฌ๐: PostgreSQL, MySQL, Supabase. Alembic for migrations, SQLAlchemy when an ORM is needed.
โข ๐๐๐ ๐๐ง๐ ๐๐ฌ๐ฒ๐ง๐: FastAPI, Flask, Celery.
โข ๐๐ / ๐๐ / ๐๐: Pandas, NumPy, scikit-learn, XGBoost, TensorFlow, MLflow, Matplotlib.
โข ๐๐ฉ๐ฌ ๐๐ง๐ ๐๐ฅ๐จ๐ฎ๐: Git, GitHub, Docker, uv for Python packaging, Streamlit for internal UIs. GCP, AWS, Azure, DigitalOcean, Heroku โ I follow client preference.
โข ๐๐ง๐ญ๐๐ ๐ซ๐๐ญ๐ข๐จ๐ง๐ฌ: Slack, WhatsApp, Telegram, Facebook Messenger, Instagram for conversational front-ends. MCP for tool-use and CRM action layers.
AI Consulting
AI Development
AI Agent Development
AI App Development
AI Chatbot
AI Classifier
AI Implementation
Artificial Intelligence
API Integration
Software Development
Web Scraping
AI Model Integration
Application Performance Monitoring Software
Git
GitHub
Docker
API Development
Machine Learning
Data Analysis
Data Extraction
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