freelance English-speaking jobs in Valongo

dentsu media At dentsu, we hold data very near to our hearts and believe it is a powerful tool used not only to learn more about your customers, but to also discover new, untapped potential. We create meaningful media experiences for clients across major global platforms, original content production, influencer programs and gaming.

Software Engineer focused on Quality Assurance & Test Automation for a web-based product. Designs, implements, and maintains automated tests for frontend and backend components, including API tests and integration testing. Collaborates with engineers, product management, and UX to ensure testability and quality. Experience with modern test frameworks, CI/CD pipelines, and AI-assisted testing tools is required.

Senior Frontend Developer needed for a project in Porto. Requires 5+ years of software development experience, strong Angular and/or TypeScript proficiency, and fluency in English. Familiarity with Java is a plus.

Leads risk function for multiple funds, ensuring strategic alignment and regulatory compliance. Develops, implements, and maintains risk management frameworks and procedures. Collaborates with investment teams to identify, quantify, and mitigate risks.

Performance Marketing Copywriter needed to create and optimize social and Google ads. Must have 2+ years of B2C marketing experience, fluency in English, and the ability to produce high volumes of copy for multiple markets.

Lead a team of Customer Service Specialists, ensuring exceptional service and high-quality standards. Manage daily customer interactions, foster a positive team environment, and drive continuous improvement in customer service excellence.

AI/ML Engineer will design and improve large-scale recommendation and ranking systems for a global consumer technology company. Responsibilities include developing commercially aware and ad-embedded recommendations, supporting social, location, and destination-based models, and optimizing ML systems.

Software Developer for media projects. Develops software features, participates in requirements analysis, testing, and documentation. Requires C#, .NET, web development, SQL, Python knowledge and 2+ years of experience.

Junior Business Analyst to analyze kiosk, app, and web performance data for Burger King, Popeyes, Firehouse Subs, and Tim Hortons brands. Build dashboards, support A/B testing, and communicate findings through reports and presentations. Requires 1-2 years of experience in business analysis, digital performance, or eCommerce analytics.

Lead AI Engineer (OutSystems) Join to apply for the Lead AI Engineer role at OutSystems 2 days ago Be among the first 25 applicants There are NO limits to your career: come shape the future and be part of a truly unique global culture at OutSystems!

Develop and maintain complex cloud applications for the Altium 365 - Valispace R&D team. Set front-end engineering direction, champion simplicity, performance, and scalability. Collaborate with teams to improve application architecture and user experience. Identify areas for improvement and propose solutions.

Experienced mobile application Product Designer needed for a globally recognized client. Collaborate with cross-functional teams to define product requirements and specifications. Create wireframes, prototypes, and user flows to communicate design ideas. Must have 5+ years of experience and a strong portfolio of app-related projects. Excellent knowledge of Figma and strong communication skills are required.

As a Continuous Improvement Senior Specialist, you will measure and monitor performance across Kantar Business Services, leading diagnostic reviews to identify improvement opportunities. You will partner with senior leaders to define CI priorities and facilitate problem-solving workshops.

Drive continuous improvement of procurement processes, tools, and ways of working. Lead process excellence, digitalization, and system governance initiatives.

Bilingual Copywriter (Portuguese/English) needed to train AI models. Evaluate chatbot performance, solve problems, and write novel conversations to improve AI quality. Fluency in Portuguese and English required.

Lead AI solutions delivery end-to-end for clients, from discovery to production. Build AI agents, automations, and workflows, and drive client relationships. Must be technically fluent in APIs, workflows, and AI agents, comfortable with code, and a problem solver.

Provides administrative support to the operational business. Tasks include updating databases, managing insurance policies, setting up financial flows for new contracts, and handling unallocated funds. Requires advanced Microsoft Office 365 skills, knowledge of insurance contracts is advantageous, and fluency in German and English.

Financial Markets Operations Specialist manages financial product delivery, performs reconciliations, ensures report accuracy, and controls operational risks.

Designs, builds, and fine-tunes AI/ML and GenAI models for agentic automation in telecom environments. Develops AI components (decision agents, RCA agents, recommendation agents, remediation agents) and integrates them into automation frameworks and orchestration engines. Builds and operates MLOps pipelines for model deployment, monitoring, retraining, and lifecycle governance.

Quoting Engineer will support and drive company objectives by working closely with the London team. Responsibilities include addressing client inquiries, collaborating with partners, utilizing data for strategy development, and ensuring supplier adherence to terms and conditions. Must demonstrate understanding of Mechanical Engineering Drawings and have excellent written and verbal English skills.