freelance English-speaking jobs in Castelo Branco

Develop full-stack applications incorporating Generative AI, integrate Large Language Models (LLMs) via APIs, and contribute to GenAI pipeline creation and optimization.

Senior Data Scientist will design, develop, and deploy data science models to solve complex business challenges. Responsibilities include leading technical development projects, collaborating with cross-functional teams, and mentoring junior Data Scientists. Requires a degree in a relevant field, 4+ years of experience, and expertise in machine learning, AI, and cloud/big data platforms.

The Content Specialist develops and delivers marketing content across EU markets, adapting strategy into compelling messaging and high-quality assets. This role ensures strong structure, clarity, and consistency within brand guidelines.

The Junior Inside Sales role manages a portfolio of B2B clients, processes recurring orders, and ensures a smooth customer experience. This role requires strong communication, organization, and problem-solving skills.

Senior Data Engineer needed for large-scale data transformation and processing in Big Data environments. Requires experience with Spark, Hadoop, Hive, Kafka, SQL, Scala or Java, and CI/CD tools.

SAP MM/SD Consultant analyzes business processes, defines needs, and leads ERP implementation projects. Develops and implements SAP solutions, provides user support, and manages licenses and authorizations.

PACO is seeking proactive assistants to help clients with life logistics, including admin tasks, coordination, and life management. Assistants utilize AI tools to research, organize, and solve problems. Fluency in English and Portuguese is required.

Reviews AI-generated C code and technical explanations for correctness, safety, performance, and reliability. Analyzes C implementations for adherence to coding standards and production-grade engineering practices. Evaluates build systems, debugging tools, and CI/CD workflows used in C development.

Intern to support the Mooring System team in achieving objectives by contributing to projects, tasks, and daily operations. Assist with research, documentation, and process improvements.

Administrative & Office Assistant to support daily operations and financial processes. Will coordinate tasks, manage documentation, assist with invoice processing, and support financial closing activities. Previous experience in administrative support, finance administration, or related fields is valued.

Senior UI/UX Designer to create intuitive, user-centered experiences for AI-driven platforms, mobile apps, and web applications. Lead the design process from concept to developer-ready handoff, working within an existing component system. Collaborate with product managers, engineers, and stakeholders to translate complex requirements into usable designs.

Account Executive to manage the French market, acquiring B2B customers through outbound and inbound sales. Requires 1+ year of SaaS sales experience, fluency in French and English, and a strong understanding of real estate technology.

Conduct surveillance of electronic and voice communications to ensure compliance with regulations and firm policies. Investigate potential violations, document findings, and escalate issues. Collaborate with various departments to resolve issues and participate in ad-hoc surveillance projects. Provide training and mentorship to junior staff.

Ukrainian speaking content moderator needed to ensure a safe and positive online environment for a global social platform. Assess user-generated content for policy adherence, identify harmful material, and manage user complaints. Must be fluent in Ukrainian and have solid English skills.

Leads global sourcing strategy for electronic components and assemblies, driving cost optimization and supplier management. Manages global supplier relationships, develops sourcing strategies, and negotiates agreements. Collaborates cross-functionally to ensure a resilient supply chain.

Account Receivable Clerk required for Siemens Global Business Services. Responsibilities include cash allocation, payment clarification, accounting transactions in SAP, bank statement reconciliation, and customer communication. Fluent Italian and basic English/Portuguese required. Bachelor's degree in finance preferred.

The Customer Success Specialist will drive product availability through data-driven insights, cross-functional collaboration, and proactive supply chain management. Responsibilities include monitoring back-order and planning reports, analyzing supply chain data, and collaborating with stakeholders to ensure accurate forecasting and optimal stock levels. The role requires a Bachelor's degree, 1-2 years of experience in a similar role, and proficiency in SAP and Microsoft Excel.

Customer Success Manager to own a portfolio of airline customers, driving long-term success, retention, and growth. Build strong relationships, align LimeFlight capabilities with customer objectives, and monitor customer health and satisfaction. Minimum 3-5 years experience in the Airline Industry or Airline Catering Industry required. Fluent in English, French a plus. Up to 20% travel expected.

Lead a backend engineering team building JVM-based microservices. Design and evolve Java & Kotlin systems, ensuring high code quality and promoting engineering best practices. Mentor engineers, own the full software lifecycle, and collaborate with cross-functional teams.

Senior Software Engineer will build modern applications using .NET C#, Kafka, Postgres, and ElasticSearch. Responsibilities include writing clean code, delivering high-quality software, mentoring engineers, and driving technical decision-making.