freelance English-speaking jobs in Maia

Perform IT audit engagements (ISO27001) and readiness assessments. Evaluate technology controls, identify findings, and communicate with clients and management.

External Sales Representative to identify new sales prospects, manage existing clients, and grow the company's presence in the South African engineering, welding, and mining industries.

Provide phone, email, and online support to healthcare professionals using a health platform. Train users on platform features and answer product questions.

Atlean World seeks Danish native speakers with B2+ English proficiency for a Customer Support Specialist role. This opportunity provides growth potential and a chance to join an international team.

HR Administrator to support employee life cycle processes including recruitment, onboarding, and benefits administration. Responsible for data accuracy in Workday, responding to employee inquiries, and managing HR documentation. Requires 2+ years of HR experience and proficiency with Microsoft Suite and HRIS systems.

Senior Data Scientist will design, develop, and deploy data science models to solve complex business challenges. Responsibilities include leading technical development projects, collaborating with cross-functional teams, and mentoring junior Data Scientists. Requires a degree in a related field, 4+ years of experience, and expertise in machine learning, AI, and cloud/big data platforms.

The QEHS Technician supports the implementation and monitoring of health, safety, environmental, and quality programs at the Porto site. Ensures compliance with regulations and standards, promotes safety culture, and contributes to environmental sustainability.

Senior QA Analyst to lead testing and validation of REST APIs powering financial, payment, and investment operations. Validate business logic, edge cases, error handling, and complex flows. Collaborate with backend engineers on design and release.

Growth Marketing Specialist to own marketing strategy and execution across multiple channels for a B2B SaaS company. Requires 2+ years of B2B SaaS marketing experience, content creation, data analysis, and excellent English communication skills.

Business Analyst Expert to design and implement insurance solutions. Analyze business processes, translate requirements into technical specifications, and provide analytical support for strategic decision-making.

Head of Human Relations will drive HR strategy, foster a high-performance culture, and align people practices with organizational goals.

Designs, builds, and deploys applications on Azure using Kubernetes. Develops and maintains CI/CD pipelines using Azure DevOps. Collaborates with development and operations teams to create and improve infrastructure.

Senior .NET Developer to join a skilled IT team in an Agile/SCRUM environment. Analyze, design, and implement software solutions using C#, .NET, SQL Server, and Angular. Collaborate with multicultural teams to modernize legacy financial systems.

Backend Node.JS Developer will build and deploy high quality software. Responsibilities include developing programs consistent with coding standards, collaborating with teams to refine requirements and designs, and participating in all stages of the software development lifecycle. Requires 3+ years of software development experience, experience working in scrum teams, and proficiency in Node.js and MySQL. Front end knowledge in React and Node.js is also required.

GoMining seeks a Referral & Ambassador Manager to grow its referral ecosystem. This role involves identifying and attracting ambassadors, managing partnerships, and collaborating with marketing and product teams to scale referral-driven revenue.

Designs, maintains, and optimizes database systems to ensure high availability, performance, and data quality. Develops and optimizes SQL queries, stored procedures, functions, and triggers. Monitors and supports critical business processes relying on database systems.

The Brand Manager develops and executes brand communication strategies, ensuring alignment with business goals. Responsibilities include multi-channel campaign management, brand consistency across all channels, and collaboration with external partners and agencies.

Compliance Professional to drive implementation and continuous improvement of the local Compliance framework in Portugal. Provides Compliance advice, ensures effective controls, and represents Compliance in local governance forums.

Senior Java Backend Developer sought for 100% remote role in Portugal. Requires 5+ years experience, expertise in Spring Boot, microservices, CI/CD, Kubernetes, Terraform, Kafka, GraphQL Federation, and Azure Cloud.

Design and evaluate structured test scenarios for LLM-based agents. Define gold-standard behavior and scoring logic to assess agent performance. Analyze agent logs and decision paths to identify areas for improvement.