freelance English-speaking jobs in Valongo

Design, develop, and maintain cloud-based EMS/NMS and Inventory Management solutions. Implement OSS functionalities across NMS, Inventory, Assurance, and Fulfilment domains. Develop and customize inventory and topology data models.

Lead SAP FI data migration activities including extraction, mapping, cleansing, and validation. Analyze and interpret financial data across GL, AP, AR, Asset Accounting, Cost Centers, P&L, and Balance Sheet. Collaborate with business users and functional consultants.

Mid Frontend Developer to design and develop UI/UX features for web platforms, online games, and mobile applications. Requires 3+ years of experience in frontend development with strong skills in HTML, CSS, JavaScript, and Vue.js.

Full-Stack Engineer will develop and deploy AI-powered learning products, focusing on scalable, maintainable solutions. Responsibilities include writing code, identifying and resolving bugs, and ensuring code quality. Requires 4+ years of experience, strong ownership, and experience using generative AI.

Designs, builds, and operates AI capabilities for real-world delivery, including LLM-enabled workflows, RAG, and agent-based systems. Engineers AI solutions end-to-end, from data preparation to deployment and monitoring. Collaborates with architects, platform engineers, and stakeholders to translate business needs into working AI designs. Contributes reusable assets and builds with production discipline, ensuring testing, version control, and performance/scalability considerations.

Provides HR administration and transactional support, including employee inquiries, policy information, and data management. Collaborates with HR departments and ensures compliance with local labor laws and company policies. Requires a degree in Human Resources Management, Business Administration, or a related field and at least 2 years of experience in a similar role. Fluency in English and German is preferred.

Controller to prepare and analyze financial and operational reports, coordinate month-end closing, and support budgeting and forecasting. Experience in audit, controlling, or financial consulting with a strong understanding of accounting principles and group consolidation processes required. Advanced Excel and Power BI skills are essential. Fluency in English is mandatory.

Experienced UX/UI Designer needed to own design initiatives end to end for Checkmarx's security platform. Must have 3+ years of experience, strong UX/UI skills, and proficiency in Figma.

R&D Project Engineer to support European funding program projects (Horizon Europe / H2020). Execute research activities, contribute to proposal drafting, and support cross-functional team activities. Master's degree in electrical engineering or related field required. Previous experience with European Commission funded projects is highly valued. Proficiency in English (minimum B2 level) is mandatory.

Experienced cost manager needed for construction projects. Responsibilities include cost planning, preparing estimates, managing tenders, and settling final accounts. Must have sound cost management experience, knowledge of construction procurement, and excellent communication and problem-solving skills. Fluent in English and Portuguese required.

The Corporate Coverage Trainee will support Coverage Portugal and Local Business in developing the franchise and increasing Business Line Revenues. Responsibilities include preparing reports, assisting with client portfolio management, preparing KYC procedures, and organizing meetings.

Software Engineer to develop and integrate software components for Cloud RAN applications. Will work with global teams to design, implement, and test software while ensuring high-quality standards.

Junior Trading Operations Engineer will monitor and manage automated trading systems, automate workflows, and collaborate with teams to resolve issues. Requires strong Python skills, Linux knowledge, and a detail-oriented approach.

Junior analyst to support investment advice for Defined Benefit, Local Governance pension schemes, Endowments, and Foundations. Collaborate with UK and Portugal consultants and investment specialist teams. Support in drafting client presentations, meeting materials, and liaising with external and internal parties. Bachelor's/Master's degree in a relevant field required. Fluent English (C1 level) and strong analytical skills necessary.

Handles incoming formal complaints within regulatory deadlines. Identifies, analyzes, and resolves issues. Sets up and improves internal procedures. Collaborates with internal teams to ensure efficient complaint resolution.

Senior Rust Developer to build a production-ready AI/API Management Platform. Full-stack ownership from design to deployment, including CI/CD pipelines and infrastructure. Strong Rust experience, backend systems knowledge, and DevOps expertise required. Opportunity to lead a future product team.

Senior Controller to support closing activities, monthly cost analysis, and preparation of management reports. Requires 4-5 years of experience in controlling, auditing, or finance, SAP knowledge (preferred), and advanced Excel skills.

This role establishes and leads global AML and compliance advisory services for Mastercard customers. The Global Product Director will develop service offerings, provide expert guidance on managing AML and compliance risks, and drive the go-to-market strategy. The ideal candidate has a strong background in AML, PEP & Sanctions, and other regulations & compliance topics.

Frontend Developer to lead the development and UI/UX maintenance of web portals, ensuring they are visually appealing, intuitive, and user-friendly.

Head Housekeeper will implement and uphold brand standards and SOPs for the Housekeeping department. Responsibilities include maintaining property hygiene standards, managing the department's budget, and collaborating with the Maintenance team. Previous experience in a similar role and people management experience are preferred.