freelance English-speaking jobs in Valongo

Hardware Product Manager to design and scale electronics products for off-grid communities. 5+ years experience in hardware product management, ideally in power electronics, energy systems, or embedded hardware. Experience with volume manufacturing and product fundamentals required.

BlackBox Strategies seeks a Lifecycle Marketing Specialist to execute outbound and lifecycle messaging for B2B and B2C audiences. This role requires experience building and managing email and CRM campaigns, understanding deliverability, segmentation, and channel tradeoffs. The ideal candidate will collaborate with leadership and the Social Media Manager to align messaging and timing.

Kotlin Mobile Developer needed for a Technology company project. Build, deliver, and maintain privacy products (SDKs) for mobile applications, games, and TV applications. Develop mobile and TV interfaces and collaborate with product teams. 5+ years of Kotlin development experience required. Strong interest in mobile technologies and automated testing. Excellent communication skills. English proficiency at C1 level.

As a Localization QA Game Tester, you will collaborate with a global team to ensure the accuracy and quality of localized games. Responsibilities include identifying and correcting language errors, ensuring adherence to console guidelines, and reporting on found issues. Fluency in Arabic and conversational English are required.

Front End Engineer specializing in React to develop user interfaces for Neuron and Cerebrum products. Analyze user stories, build technical designs, develop software components, and participate in the full software development lifecycle.

Fullstack Developer with 5+ years of experience in e-commerce environments. Develops and implements responsive user interfaces, integrates third-party applications, and optimizes for SEO. Requires expertise in Angular, JavaScript, NodeJS, and cloud platforms.

Order to Cash (O2C) Specialists needed for finance operations in Porto. Junior roles require 6+ months experience and fluency in Dutch, French, or German. Senior roles require 5-7 years experience, fluency in German, and advanced English.

Senior Identity and Access Management Specialist will configure, install, and maintain IAM systems, ensuring secure access governance. Responsibilities include automating processes, integrating IAM platforms, managing databases, and troubleshooting issues. Requires 2+ years of experience in IAM, strong knowledge of Usercube/Netwrix platforms, and proficiency in PowerShell, CLI, and REST APIs.

Portuguese-speaking Sales Development Representative to support a vacation rental client. Focus on outbound calling, lead qualification, and transferring qualified leads to Sales Managers. Requires fluency in Portuguese and English, 3+ years of cold calling experience, and comfort with CRM systems.

Lead and grow the Developer Experience (DevEx) function, shaping its mission, scope, and operating model. Build a strong team culture and enable engineering teams to ship faster and more reliably. Translate company strategy into a DevEx roadmap and drive adoption of a unified design.

Java Software Engineer with 5+ years of experience developing applications, including backend and frontend layers. Strong knowledge of HTML, CSS, JavaScript, and modern frameworks. Experience with relational and NoSQL databases, microservices, and cloud environments. Fluent English required. Hybrid work model (3 days onsite).

Review and moderate content to ensure compliance with community guidelines and policies. Evaluate and remove inappropriate material, flag violations, and promote a safe online environment.

Freelance Project Manager needed to manage end-to-end delivery of e-commerce creative toolkits, including banners and product imagery.

Provide customer support via multiple channels for subscriptions, billing, and technical issues. Must be native or C2-level French speaker with strong communication skills. No experience required, full training provided.

HR Trainee supporting talent acquisition, customer service, process optimization, and team operations. Requires fluency in English and at least B1 level German. Degree in Human Resources, Psychology, Management, or a related field.

This role focuses on centralized management and evolution of Windows-based physical endpoints. Responsibilities include defining, managing, and evolving workstation configurations, policies, and software deployment frameworks. The ideal candidate will have proven experience in desktop management and configuration activities, strong knowledge of Windows 11, and experience with Microsoft 365, Active Directory, and Microsoft Intune.

Freelance peer reviewers with a doctorate in clinical cardiology are needed to evaluate manuscripts for originality, study design, literature review, results, and provide constructive feedback. Prior peer review experience and familiarity with online review systems are preferred.

Cyber Security Professional for Territories will participate in updating and establishing Cyber Security & IT Risk SLAs, monitor cyber security levels, and deploy the Cyber/IT Risk dashboard. The role requires ISO 27001 and ISO 27005 certifications, Microsoft Office proficiency, and fluency in English.

Develop and deliver complex machine learning and NLP solutions. Analyze large datasets to uncover insights and guide modeling decisions. Build, test, and deploy ML models into production systems. Collaborate cross-functionally to translate prototypes into production-grade models and services.

Senior System Engineer needed for Manufacturing IT team. Responsibilities include infrastructure operations, Level 2 support, patching, and automation. Requires Bachelor's degree, 3+ years experience, and scripting (PowerShell, Python) skills. Strong communication and problem-solving abilities are essential.