freelance English-speaking jobs in Valongo

Develops, manages, and executes the global sourcing strategy for energy and utilities, including electricity, gas, water, renewable energy, and energy services. Leads strategic sourcing initiatives, analyzes market trends, and manages supplier relationships. Collaborates with stakeholders to understand consumption needs and drive cost savings and sustainability initiatives.

Senior AI Research Scientist to conduct and lead novel research in Machine Translation, Quality Estimation, and Multilingual Large Language Models. Implement code for training, fine-tuning, and evaluating models. Coordinate with TransPerfect teams to develop technology-based solutions.

Manages customer complaints, monitors corrective actions, and analyzes quality indicators. Requires a Bachelor's degree, preferably in Engineering, and experience in customer quality and audits (IATF 16949, VDA 6.3).

Service Engineer to perform maintenance, troubleshooting, and repairs on electrical and automation systems. Experience with industrial automation systems and PLCs required. Strong troubleshooting skills in electrical and control systems needed.

Drive control implementation across TUI's CISA-aligned Zero Trust program, translating strategy into deployed, verifiable controls. Measure Zero Trust maturity progression using Microsoft Security Exposure Management, Maester assessments, and Microsoft Secure Score. Provide technical depth across pillar-specific control areas including Conditional Access policy design, Entra ID Governance, PIM, phishing-resistant MFA deployment, trusted device strategy, Intune policy enforcement, network segmentation, secure remote access patterns, application ownership models, Entra SSO integration, API security governance, and data loss prevention.

SAP Consultant needed for projects across Portugal. Experience with FI, CO, MM, SD, PP modules required. SAP HANA experience is a plus. Must have knowledge of program documentation, systems analysis, design, and testing principles. Proficiency in English communication is required.

As a Presales Solutions Engineer, you will support the commercial business by bridging technical expertise with customer-facing communication. You will deliver product demonstrations, collaborate with sales teams, and assist with solution designs and Proof-of-Concept activities.

React Frontend Developer with 5+ years of experience building Web SPAs using React. Solid knowledge of JavaScript, HTML, CSS, and experience with the Ágora design system.

Cloud Security Engineer will design, implement, and improve security frameworks for cloud development and deployment. Experience with cloud providers (AWS, Alibaba Cloud, or GCP), DevSecOps, and security in the software development lifecycle is required.

Data Scientist specializing in Computer Vision, NLP, and Deep Learning to build smart ML models using image, text, audio, and tabular data.

Provide French-language customer support via phone, email, and chat for meal card services. Resolve inquiries, complaints, and technical issues. Must be native or C2-level French speaker.

The Principal Network Service Engineer ensures the reliability, performance, and continuous improvement of enterprise network services. This role owns the operational integrity of network platforms, acts as a technical escalation point, and drives service improvements.

Build and scale developer adoption for a new Developer & Agent Interface capability at Payward. Own developer activation across APIs, SDKs, CLIs, MCP servers, wallets, and emerging agent interfaces. Drive adoption metrics and create technical narratives, launch content, and demos. Represent developers internally and help define how developers and AI agents interact with Payward infrastructure.

Leads deployment, support, and automation activities for application operations, ensuring reliability and customer experience excellence. Oversees the full application lifecycle, including compliance, performance, and operational resilience. Designs and implements automation for deployment, change, and release processes. Collaborates with global teams and stakeholders to ensure security standards and resolve incidents.

Develop and support suppliers of heavy steel and fastening elements. Qualify new suppliers and components, conduct evaluations, and perform audits. Manage supplier quality issues.

As a Factoring Specialist, you will manage end-to-end factoring submissions and refunds across multiple markets. You will identify invoices suitable for factoring, coordinate submissions, and ensure accurate reconciliation. This role requires experience in accounts receivable or factoring, strong analytical skills, and the ability to communicate effectively across teams.

Project Delivery Engineer will configure cloud communications services, manage customer telephony, and execute provisioning projects. Requires a Bachelor's Degree in a STEM field or equivalent experience, strong analytical and customer service skills, and excellent communication abilities.

Build, train, and optimize Machine Learning and AI models for use cases such as regulatory forecasting, text analysis, and predictive intelligence. Prepare, clean, and validate data, performing feature engineering. Collaborate with engineering teams to deploy models into production. Monitor model performance and implement automated retraining.

Experienced AI Engineer (Python Backend) to design and develop backend systems for GenAI applications. Responsibilities include building microservices, integrating with LLM APIs, and developing AI workflows. Requires 3-4+ years of Python backend experience and 1-2+ years with GenAI, LLMs, or vector databases.

Product Owner will lead and own product development from ideation to launch, ensuring alignment with business goals. Responsibilities include setting product roadmaps, collaborating with cross-functional teams, and driving data-informed product decisions. Requires 2+ years of experience leading consumer-facing products and managing cross-functional teams.