freelance English-speaking jobs in Valongo

SIGA LATIN AMERICA seeks a Senior Research, Knowledge & Strategic Funding Consultant to support regional and global activities. The role involves identifying and securing research funding, developing research and knowledge outputs, and contributing to the development and implementation of SIGA's Universal Standards.

Fidelidade seeks an ESG Reporting & Investment Analyst to integrate ESG considerations into investment analysis and decision-making. The role involves ESG due diligence, portfolio analysis, regulatory reporting, and collaborating with cross-functional teams.

Clinical Research Associate (CRA I/II) to support early-phase (Phase I) clinical trials in Portugal. Conducts site monitoring, ensures patient and site protection, oversees data quality, and manages operational site activities. Requires a Master's degree in healthcare, 2+ years of CRA experience, and experience in Phase I trials.

The IT Support Officer provides advanced technical support to the organization, managing software and hardware systems, ensuring a secure digital environment. Responsibilities include endpoint and hardware management, Google Workspace administration, RMM and automation, security and compliance, incident resolution, and asset management.

This role supports the sell-in sample process by managing purchase orders, communicating with internal and external stakeholders, and resolving issues. The Specialist will act as a key contact for Marketing and Markets, providing service excellence and supporting sample-related projects.

Provides customer support to hoteliers via various channels, resolving queries and ensuring customer satisfaction. Requires fluency in Portuguese and Spanish, excellent communication skills, and 3+ years of experience in a customer-facing role.

Design, prototype, and optimize multi-armed bandit models with contextual inputs and uncertainty quantification. Implement, scale, and productionize reinforcement learning pipelines for real-time pricing, recommendation, or allocation systems.

Lead the product development lifecycle for AI-driven features, collaborating with engineers, designers, and data scientists to develop and launch AI solutions. Define the AI product roadmap, ensuring alignment with business objectives and user needs.

This 12-month fixed-term contract role focuses on optimizing global payroll operations processes, introducing automation, and improving data accuracy. The successful candidate will design, build, and test robust payroll processes, partner with the Payroll Manager, and support payroll-related transformation initiatives. Experience in process improvement, payroll operations within a multi-entity environment, and working with UK and US payroll is highly beneficial.

This contractor role supports ULI Portugal's mission by growing and retaining membership, organizing events and programs, and communicating activities. The successful candidate will manage budgets, oversee third-party contractors, and collaborate with ULI colleagues across Europe. Strong organizational, communication, and interpersonal skills are required, along with fluency in Portuguese and English.

Provides technical and documental support to ensure production line effectiveness and efficiency. Collaborates on quality documentation, production layout, and testing results. Supports continuous improvement and maintenance management tools.

Maintenance Team Leader will coordinate team activities, assign tasks, and lead development. Provides technical assistance, diagnoses defects, and participates in problem-solving. Requires a background in mechanics, electromechanics, electronics, industrial maintenance, automation, programming, robotics, or similar. Previous experience in a similar role is valued.

Senior .NET developer to maintain and improve existing functionality and develop new application parts. Experience in .NET development, test coverage, OOP principles, and database concurrency required.

Ensures smooth payment flows, handles credit card transactions, reconciles accounts, and supports tax-related processes. Prepares franchisee account statements, creates invoices, and acts as a key contact for accounting inquiries.

Business Development Consultant needed to build relationships and close high-value digital projects with startups and innovative companies globally. Experience in B2B sales, strong communication skills, and an entrepreneurial mindset are required.

As a Social-First Customer Care Specialist, you will provide support to users across social media and email, addressing questions, resolving issues, and maintaining a positive brand presence. Responsibilities include responding to comments and direct messages, using a CRM to track cases, and providing support for account, subscription, and product-related issues.

Provide administrative support, including document scanning, customer service, and communication. Work collaboratively within a team to achieve company objectives.

Bartenders create memorable guest experiences by mixing drinks, anticipating needs, and building relationships. They ensure the bar functions flawlessly and maintain a professional appearance.

FullStack Developer (React + Node.js) to architect, maintain, and develop scalable backend services and React-based frontend applications.

Develop and maintain data-processing scripts using C#, SQL, and Python. Design, build, and maintain Power BI reports and dashboards. Analyze and document existing scripts, including legacy code. Provide support for the Abacus platform and assist users with data flows.