freelance English-speaking jobs in Valongo

Sales Representative needed for a global customer relations leader based in Lisbon. Manage a portfolio of SMEs, identify sales opportunities, and develop revenue. Provide pre-sales and after-sales support, product support, and identify trends. Must be native in German, French, or Dutch (C1 level), have 1+ year sales/marketing experience, and excellent English communication skills.

Fullstack Java & (React or Angular) Developer will design, develop, and maintain scalable web applications using Spring Boot and React (TypeScript). Experience with legacy applications (FBTI) and reverse engineering is required.

Recruit top tech talent for IT roles using innovative sourcing strategies. Partner with hiring managers to define needs and create tailored recruitment plans. Assess technical skills and cultural fit through interviews.

Product Analyst will shape product decisions through data-driven insights and experimentation. Collaborate with product managers, engineers, and designers to inform strategy, evaluate feature impact, and enhance user experience.

Digital Marketing Analyst to analyze and evaluate digital campaign performance, providing actionable insights and supporting internal teams. Requires 3+ years of experience in digital data analysis and visualization, advanced expertise in Adobe Analytics and Power BI, and fluency in French and English.

Commissioning and navigation engineer for robotics company. Requires degree in relevant field and experience with Linux, ROS, control algorithms, and Git. Problem-solving, teamwork, and travel required.

Review and moderate user-generated content to ensure compliance with platform policies and quality standards. Identify policy or legal issues and escalate cases. Maintain high quality standards across the platform.

Junior Operations Officer needed to perform and validate payment executions, execute correspondent banking operations, and process settlement documents. Must have a degree in a related field and 2-3 years of experience in banking operations, financial back-office, middle-office, payments, or securities processing.

Fullstack Tech Lead to guide development initiatives, maintain applications and APIs, and mentor team members. Requires strong Java, React, and DevOps experience.

Senior Software Engineer to contribute across the full development lifecycle, collaborating with architects and stakeholders. Drive quality and continuous improvement while modernizing technology and building new products.

Develop and maintain mobile applications using React Native. Collaborate with backend and product teams to deliver integrated features. Ensure high code quality and adherence to development best practices.

Leads the design, architecture, and implementation of SAP S/4HANA solutions. Translates business requirements into scalable SAP solutions and defines integration architecture. Provides governance on best practices, data models, security, and performance optimization.

Freelance AI trainer needed to design physics problems, evaluate AI solutions, and validate calculations using Python. Must have a physics degree, 3+ years of experience, strong Python skills, and excellent written English.

Design, develop, and optimize mission-critical applications using .NET Core and .NET Framework. Contribute to the migration from .NET Framework to .NET Core. Ensure secure, high-quality code through peer reviews and automated testing. Provide third-line technical support for production incidents.

Lead the design, development, and delivery of high-quality Android applications. Act as a technical authority, mentor engineers, and collaborate with cross-functional teams.

The Field Engineer will manage the integration of buildings into the Bandora platform, configuring HVAC systems and BMS, implementing communication protocols, and troubleshooting integration issues.

Support businesses in managing and optimizing their online advertising campaigns. Assist clients with Google Ads products and advertising strategies. Provide recommendations to improve campaign performance. Maintain strong relationships with business clients.

Mobidea seeks an AI Manager to lead the development and implementation of AI systems across its affiliate marketing businesses. This hands-on role involves building AI bots, autonomous agents, and MCP-native tooling, as well as scaling AI-generated creatives and automating compliance and fraud detection.

As a System Integration Analyst, you will create and deliver solutions addressing business needs through technology integration and automation. You will be involved in all stages of the delivery process, from ideation to deployment, ensuring solutions are effective and meet business objectives. You will work with business stakeholders, technical colleagues, and vendors to develop and review solutions, document technical requirements, and support testing activities.

Senior Jira Administrator & Integrator needed for a large-scale project. Experience with Jira Data Center/Server, workflows, automation, and integrations with ServiceNow, SILVA, GitHub, and BI tools required. Agile (Scrum, Kanban, SAFe) and ITIL knowledge, reporting/dashboards, and basic SQL skills are essential.