freelance English-speaking jobs in Castelo Branco

Provide technical support via phone and email to Nox Medical customers using diagnostic hardware and software. Resolve technical issues, communicate product performance information, and collaborate with teams to elevate complex support cases.

Leads the strategic adoption of AI across Trinetix, optimizing the corporate ecosystem and delivery lifecycle. Manages the integration of AI-native workflows into core operations and drives the standardization of AI across the firm.

Mid-Level Backend Developer to build and evolve the core system powering health insurance for long-term travelers. You'll work with Kotlin, a custom event-sourced framework, and AI-agentic development tools. Experience with complex backend systems, event sourcing, and AI-agentic development is required.

Leads the Gaming, Platform, and Publishing Analytics function, partnering with cross-functional teams to drive data-informed decision-making and operational excellence. Accountable for leading a team of product analysts, business analysts, and analytics engineers. Oversees the design and delivery of key gaming and publishing dashboards and reports. Champion best practices in experimentation, measurement, and performance analytics.

Lead technical offensive and defensive security strategies, focusing on application security, penetration testing, and cloud infrastructure. Specialize in securing the lifecycle of Large Language Models (LLMs) and AI integrations. Conduct deep-dive penetration tests, develop exploits, and perform secure code reviews. Design and implement defenses against AI attacks, establish audit frameworks, and build custom security tooling. Act as the "Security Architect of Record" for projects and mentor senior engineers.

MASSLAB seeks a Senior Architect with a Master's degree and 7+ years of experience to design and deliver complex projects. Must possess exceptional conceptual and design skills, proficiency in 2D/3D tools, and fluency in English. Revit experience is a plus.

Accountant will manage financial records, ensure regulatory compliance, and report to the Regional Finance Manager for Germany and Austria.

DevOps Engineer to manage, evolve, and optimize cloud and SaaS environments, including Azure, GCP, CloudAMQP, MongoDB Atlas, Kubernetes, and on-premises services. Design, implement, and maintain CI/CD pipelines and GitOps practices. Administer and enhance the GitLab platform. Ensure system high availability, scalability, and performance. Collaborate with development teams to improve deployment, testing, and observability. Implement and maintain security best practices. Monitor systems, applications, and pipelines. Document architectures, processes, and operational procedures. Support the definition and evolution of the platform's technical architecture.

Senior Account Executive drives new business acquisition and revenue expansion across EMEA. Manages full sales cycle for strategic accounts, leveraging consultative selling and structured pipeline management. Collaborates with cross-functional teams to align customer needs with product and service delivery. Requires 4+ years of B2B sales experience, proven quota attainment, and experience managing complex, global sales cycles. Fluency in English is required.

Product Owner will translate business goals into actionable requirements, guide development teams through sprints, and maintain communication between stakeholders and engineers.

Principal Data Scientist will work across functions to solve business needs. Translate client requirements into solutions, ideate and develop product innovations, and define and own the roadmap for R&D and prototyping. Build statistical and analytical models, including ML/AI approaches, and document solutions and experimentation.

AI Specialist needed for a hybrid project in Lisbon. Requires 3+ years of experience with Python, AI Modeling, Machine Learning, Deep Learning, and AWS. Familiarity with DevOps/MLOps tools and French (B2) is also required.

Provides turnkey support to Hoist Network customers on multiple platforms and services. Resolves technical issues via phone, email, tickets, and remote troubleshooting. Analyzes data to identify root causes and implements solutions. Must have excellent customer service and communication skills, as well as a basic technical background in TCP/IP and networks. Fluency in English and French is required.

As a 1st Cook, you will prepare, cook, and present high-quality dishes to deliver an excellent guest experience. You will ensure the presentation, quantity, and quality of each dish, maintain a clean work area, and follow health and safety regulations. At least 1-2 years of experience as a Kitchen Assistant in a similar environment is required, along with vocational training in hospitality/F&B/kitchen. Fluency in the local language and knowledge of English are essential.

Data Administrator needed to support vehicle pick-up process for cross-border buyers and ensure data accuracy on online marketplace. Fluent English required, other European languages a plus.

Senior HTML/Markup Developer to join a development team in Lisbon. Develop efficient, fast, and adaptive layouts of interfaces. Collaborate with developers and web designers. Requires 5+ years of experience as an HTML coder with excellent knowledge of HTML and CSS.

Fullstack Developer (Angular + Java) to develop and maintain front-end and back-end applications for an Energy project. Requires 5+ years of Angular (v8+) experience and 3+ years of Java and Spring Boot experience.

Software Test Engineer will ensure functional verification of changes, including regression testing, for the 360T platform. Responsibilities include developing test suites, test cases, and contributing to quality assurance initiatives. Requires 5+ years of QA experience, proficiency in test management tools, and knowledge of APIs, version control, and CI/CD tools.

Provides support and information to students on application processes and various aspects of their academic experience. Resolves practical issues, responds to inquiries, and assists with administrative, financial, and social action processes.

HR Data & Operations Specialist supporting employees and managers across countries. Provides HR support, manages HR systems, and assists with onboarding, mobility, and day-to-day processes. Fluency in French is required.