freelance English-speaking jobs in Valongo

Senior Android Developer will design, develop, and deliver high-quality, scalable Android applications. Responsibilities include writing clean, maintainable code, providing technical leadership, and contributing to the entire development cycle. Requires experience with native Android languages, Android development, and Restful APIs.

Experienced Luxury Real Estate Agent to manage a portfolio of buyers and sellers in the mid-market and luxury residential space. Develop sales strategies, guide clients through complex transactions, and provide exceptional service. Minimum 3 years of success in the luxury residential sector required. Fluency in English required, Portuguese a plus.

Cost Manager to deliver cost management services for construction projects, from initial estimates to final account settlement. Responsibilities include cost planning, tender management, and advising on procurement strategies. Requires experience in construction projects, strong communication and problem-solving skills, and fluency in English and Portuguese.

Senior Infrastructure Engineer to architect and implement scalable infrastructure solutions for high-growth crypto and FinTech applications. Experience with data stores, cloud infrastructure, DevOps tooling, and IaC is required. Proven consulting experience and strong communication skills are essential. FinTech experience is preferred, crypto/web3 experience is a plus.

Ryanair Group is hosting a Cabin Crew Assessment Day in Porto on February 27, 2026. Successful applicants will participate in a 6-week training course to become qualified cabin crew members. The role requires the ability to swim 25 meters, be between 5'2" and 6'2" tall, and have the unrestricted right to live and work in the EU. Applicants must be comfortable working a shift roster, enjoy dealing with the public, and have excellent customer service skills. Fluency in English is required.

Lead the development and integration of hub components and features into hub and nacelle products. Deliver mature, validated technology components to support ongoing and future hub projects. Drive project execution using Vestas’ Modular Way to Market, ensuring high-quality models, documentation, and manufacturing readiness.

Electronics and Electrical Testing Project Coordinator will coordinate projects, design testing hardware, and support project management and software development teams. Requires a Bachelor's or Master's degree in Electrical Engineering (Electronics), 2+ years of experience, and fluency in English.

Ethiack seeks a Security Researcher to conduct vulnerability research, find CVEs, and improve automated hacking. Responsibilities include researching 0-day vulnerabilities, developing exploitation vectors, and contributing to cutting-edge cybersecurity research. Requirements include advanced Python skills, knowledge of cloud infrastructure, penetration testing methodologies, and a proven track record in CTF competitions or bug bounty programs.

The Assistant Front Office Manager oversees daily Guest Service operations, ensuring exceptional service and guest satisfaction. This role manages guest requests, coordinates with other departments, and leads the Guest Service team. Requires previous hospitality experience, supervisory skills, and fluency in English and Portuguese.

Delivery Operations Team Lead will guide a team in analyzing, resolving issues, and driving operational excellence. The role requires experience in Transaction Monitoring, Suspicious Activity Reports (SARs), and team management.

Arabic-speaking Customer Service Specialist to support advertisers of a leading global Social Media platform. Experience in paid campaign management, troubleshooting, and digital marketing required.

IT Project Manager fluent in French required for national and international projects. Proven experience in Agile/Scrum environments with Scrum Master certification. Strong communication, facilitation, and analytical skills. Manage project scope, risks, and dependencies while leading Scrum ceremonies and collaborating with cross-functional teams.

Risk Manager will conduct financial crime investigations, extract insights, and support the design of financial crime frameworks. You will identify gaps in processes and controls, and collaborate with various teams. Requires 6+ years of experience in financial crime investigations and a solid understanding of AML/CTF regulations.

The Laboratory of Polymer Chemistry (PCL) is offering a 12-month research grant, renewable up to 36 months, for a First Stage Researcher (R1) in Materials Science and Engineering. The grant supports work on the MINEPIPE project, developing PE100-based formulations for high-performance pipes.

Financial Systems Analyst needed with a degree in IT or Finance and experience in business/IT relationships. Must have knowledge of finance & budget, financial performance analysis, and Business Intelligence tools (SAP Business Objects preferred). Proficiency in Microsoft Excel, PowerPoint, and Power BI is required. Fluency in English is essential.

Scrum Master / PMO needed for IT or software development projects. Requires experience with agile methodologies, project management, and strong communication skills. Fluent English is essential.

Administers and maintains MS SQL Server databases, including complex architectures and backups/restores. Provides support to internal teams and clients, analyzes incidents, and troubleshoots issues. Requires strong SQL Server administration experience, knowledge of AlwaysOn, clusters, and replication, and proficiency in T-SQL.

Junior Credit Operations Analyst to monitor financing operations, liaise with Front Office, review agreements, and ensure compliance.

Junior QA Analyst to perform manual tests on web and internal applications. Create, update, and maintain test cases and plans. Collaborate with IT and business teams to ensure application quality.

Java Developer needed for full stack web application development, including REST APIs, microservices, and cloud migrations. Experience with legacy application analysis, Vue JS, Java, JSF, Spring Boot, Docker, Kubernetes, and cloud technologies is required.