freelance English-speaking jobs in Valongo

Freelance Customer Service Representatives needed for a healthcare support project. Provide product and technical support to customers across Europe. Must have full professional proficiency in German (C2 or above) and fluent English. Previous experience in customer service, technical support, and healthcare is required.

Project Manager with 6+ years of experience leading IT infrastructure projects (networking, server deployments, cloud migrations, data center operations). Coordinates global teams, manages schedules, and ensures projects are delivered on time and within budget.

Provide non-voice customer support (chat and/or ticket) in German to clients. Follow SOPs, investigate issues, and improve customer experience.

Senior engineer to design, build, and scale a production-grade IoT/MQTT platform. Experience with AWS, containerization, time-series databases, and MQTT systems required.

GoMining seeks an Account Manager to support and grow its referral and partner ecosystem. This role involves explaining GoMining products, resolving partner issues, and collaborating with internal teams.

Salesforce Developer with 4+ years of experience in Apex development, Lightning Web Components, and Salesforce Field Service. Requires knowledge of integrations, SOQL, CI/CD, and Salesforce security. Fluent English required.

Cyrex seeks a Web Penetration Tester with 5+ years of experience in web and mobile penetration testing. Responsibilities include penetration testing web apps, mobile apps, and APIs, reviewing source code for security issues, and producing clear reports with PoCs and remediation guidance. Strong OWASP Top 10 knowledge, manual testing skills, and Burp Suite expertise are required.

Sustainable Wealth Group seeks experienced leaders to serve as Non Executive Directors for pre-seed to Series A startups. Provide strategic guidance, leverage your expertise, and support fundraising efforts. Compensation includes equity or stipend.

Senior SAP S/4HANA Business Analyst will collaborate with departments across the Lead-to-Cash value chain to gather, analyze, and document business requirements. The role involves embedding requirements in end-to-end process design, evaluating commercial processes, and defining functional needs for S/4HANA Sales and VIS applications. Responsibilities also include working with IT teams to design and implement technology solutions, ensuring integration between various systems, and providing guidance on process changes.

Senior Infrastructure Architect with 6+ years of experience in high-performance financial markets or critical trading environments. Strong Linux system administration, virtualization, and container technologies experience. Proven track record of optimizing mission-critical server infrastructure. Proficient in scripting languages (Python, shell) for automation. Experience collaborating with software development teams and infrastructure groups. Fluent in English. Must be based in Portugal with European citizenship or a valid Work Visa/Residence Card.

Full-Stack Software Developer needed for a global SaaS company. Design, develop, and maintain solutions using .NET, Angular, MS SQL, and PostgreSQL. 4+ years of experience with .NET technologies, HTML, CSS, JavaScript, and relational databases required. Hybrid role with 2 days per week in the Lisbon office.

Develop, maintain, and optimize scalable backend solutions using .NET 6+, C#, and DDD/Microservices Architecture. Design and implement robust .NET WebAPIs, integrating Entity Framework/Dapper, LINQ, and SQL. Write clean, testable code with strong unit test coverage. Collaborate with teams to deliver end-to-end solutions.

Manage medium to large corporate projects and programs connected to DSV strategy. Develop projects from initiation to operations, manage budgets, and oversee project progress. Collaborate with PMO colleagues across multiple countries.

Provide customer support via phone, email, chat, and social media in Dutch and English. Resolve customer issues, offer product and service information, and maintain accurate records.

Provides administrative and operational support for HR functions. Maintains employee records, supports payroll, and assists with recruitment and onboarding. Requires a degree in a related field, at least 1 year of experience, and proficiency in Microsoft Office.

We are seeking a dedicated APP Test Manager with a focus on test automation to join our mobility+ APP development team. You will be responsible for the full testing lifecycle of mobile app components, ensuring high-quality delivery. You will design, implement, and execute functional and operational tests, and develop and maintain the team's test concept.

Leads and manages all Corporate Social Responsibility (CSR) and Environment, Health and Safety (EHS) activities. Ensures compliance with legal requirements, internal procedures, and certification standards. Manages audits, non-conformities, and complaint resolution. Monitors workplace conditions, implements corrective actions, and oversees emergency systems. Maintains CSR and EHS management systems and documentation. Conducts training programs and promotes employee awareness. Collaborates with cross-functional teams to ensure alignment on CSR and EHS matters. Monitors performance indicators, proposes improvements, and supports initiatives related to decarbonization, circular economy, and chemical management. Represents Nilorn in interactions with clients, suppliers, auditors, and regulatory entities.

Senior Startup Leader supports entrepreneurs and the Empowered Startup Platform roadmap. Provides guidance, connects entrepreneurs with service partners, and ensures framework processes operate effectively. Requires proven experience in supporting startups, fluency in English and Portuguese, and multicultural experience. Travel throughout Portugal is required (5-10% of the time).

Experienced Senior Full-Stack Developer with 7+ years of PHP and 5+ years of React experience sought for a 12-month contract. Must be fluent in Portuguese and comfortable working across the full development lifecycle.

As a Senior Engineer on the Observability Team, you will partner with product teams to define and implement observability solutions that align with customer experience. You will design and automate scalable telemetry pipelines, harden platform infrastructure, and contribute to the development of observability-focused tools and services.