freelance English-speaking jobs in Valongo

Jobbex is seeking a Java Fullstack Developer to design, develop, and maintain fullstack applications. Responsibilities include building RESTful APIs, collaborating with teams, and ensuring code quality. Ideal candidates have 5+ years of experience with Java 17/21, Spring Boot, Angular, and microservices architecture. Fluency in English and French is required.

Develop and maintain Android applications using Java and/or Kotlin. Design user interfaces, integrate APIs, and debug/optimize applications. Collaborate with teams to translate requirements into technical solutions.

Contract Management Specialist to manage land lease agreements for renewable energy projects in Portugal. Responsibilities include maintaining agreements, building landowner relationships, monitoring contractual obligations, and coordinating with Legal.

Supervise daily housekeeping operations to ensure cleanliness and luxury standards. Lead and motivate a team, manage guest requests, and ensure compliance with regulations.

Senior Backend Developer with 8+ years of IT experience and 3+ years in leadership roles. Expertise in Node.js, web development, REST, WebSockets, and databases (MySQL). Experience with RabbitMQ, Redis, and Git. Must be fluent in English (B2 level).

Accountant needed for multinational pharmaceutical company. Responsibilities include journal entries, month-end accruals, account reconciliations, fixed asset management, and tax reporting. ERP knowledge, fiscal experience, and strong Microsoft Office skills required.

Junior Key Account Manager for rare diseases project in healthcare. Promote disease awareness, support early diagnosis initiatives, and deliver scientific presentations to medical audiences. Previous experience as a Medical Representative and hospital visits required.

Helpdesk professional to provide customer service, diagnose and resolve incidents, and assist with equipment and software installation. Requires 5 years of experience in similar roles, experience in the financial sector, and proficiency with Jira and various banking software.

AI Data Engineer needed for Lisbon-based company. Develop and deploy AI models, process data pipelines, and collaborate on innovative AI solutions. Requires Python, SQL, ML frameworks, and cloud platforms experience.

Waiter/Waitress responsible for taking orders, delivering food and beverages, and providing excellent customer service. Must have previous experience in a similar role, hospitality/F&B training, and fluency in the local language and English.

Native-level Spanish (LATAM) Computational Linguist needed for a 12-month project. Assess speech quality, categorize audio, and collaborate with scientists. Requires Python, command-line proficiency, and strong analytical skills.

IT Business Analyst to provide operational IT support for systems and applications, ensuring high availability and reliability. Responsibilities include troubleshooting technical issues, monitoring systems, and collaborating with stakeholders to understand business needs. Requires understanding of IT infrastructure, scripting, and relational databases.

Staff AI Agent Engineer will design, build, deploy, and iterate AI agent products end-to-end, ensuring measurable value across Siemens Energy. Responsibilities include building production agents and tools in Python/TypeScript, staying at the frontier of agentic AI research, and collaborating cross-functionally to translate workflows into reliable agent behaviors.

Automation Tester needed for a national project. Responsibilities include developing and executing automated test scripts, collaborating with teams, and contributing to the training of colleagues. Requires a degree in Informatics or related field, minimum 4 years of experience in test automation, and fluency in English and French. Expertise in Selenium, WebdriverIO, Gherkin, Cucumber, Maven, Jenkins, Docker, and Kubernetes is necessary.

Head Private Trips brand, driving growth and shaping its future. Build, launch, and optimize private trips leveraging AI. Collaborate with IT, marketing, and customer success teams. Ensure product meets customer needs and remains competitive. Source and negotiate with suppliers.

Platform Engineer needed for contract role. Review and assess domain-specific documents for quality and accuracy. Collaborate with teams to improve document analysis methodologies. Must have a Bachelor's degree, 2+ years of relevant experience, and proficiency in Excel, PowerPoint, and Word.

System Administrator will manage and support Windows Server environments, including Active Directory, Exchange, and Office 365. Responsibilities include troubleshooting, system updates, and collaborating with teams. Requires proven experience with Active Directory, Exchange, and PowerShell scripting.

The Senior Solar Project Manager delivers utility-scale solar PV projects in Portugal, managing projects from development through construction, commissioning, and handover. The role leads project execution, construction activities, and stakeholder management, ensuring projects are delivered safely, on time, and within budget.

Project Manager with +5 years of experience in IT environments required. Must have a Bachelor's degree in a related field, strong understanding of SDLC, CI/CD, and DevOps. Proven ability to work with engineering teams and stakeholders. Fluency in French and good English skills are mandatory.

Manage a portfolio of existing and new customers, building relationships and driving revenue growth. Identify upsell and cross-sell opportunities, introduce new features, and support customer expansion.