freelance English-speaking jobs in Valongo

Optical AIT Engineer to support design, Assembly, Integration and Testing (AIT) of optical systems for space and ground applications. Will perform optical alignment and testing activities, contribute to proposal preparation, and provide technical documentation.

Marketing Lead will own revenue and commercial performance for a boutique hotel, wellness center, bakery, and bistro. Responsibilities include managing direct booking revenue, ADR and RevPAR, local audience growth, campaign development, and team leadership. Must have 5+ years of marketing experience, including 2+ years of revenue ownership and team management. Experience with hospitality, multi-channel campaigns, OTAs, CRM, paid media, and product development is required.

Junior Talent Manager to support consultants, contribute to their development, and manage onboarding and offboarding processes.

The Housekeeping Manager oversees guest experience related to cleanliness and visual impressions onboard, ensuring premium service. This role requires strong hospitality, communication, and organizational skills, along with effective decision-making. The manager is responsible for maintaining cleanliness, delivering services to high expectations, and fostering a positive working environment. They provide training, leadership development, and performance management for supervisors and crew members.

The Key Account Manager develops and manages strategic client relationships, identifies client needs, and provides tailored solutions to maximize business opportunities.

Customer Service Representative needed for a leading e-commerce brand. Provide excellent customer service in Polish and English through written and verbal communication. Must be fluent in Polish, have good English skills, and be customer-oriented.

Leads the development and execution of the product delivery roadmap, manages dependencies and risks, and ensures seamless delivery through effective prioritization and stakeholder collaboration. Manages a team of Agile Coaches and Delivery Assurance Leads, bridging product strategy with operational execution.

As a Senior Data Engineer, you will design, build, and maintain scalable data architecture for a portfolio of mobile apps. You will own the end-to-end data lifecycle, from ingestion to modeling, and develop Python pipelines and dbt models. You will also partner with analytics, product, and growth teams to ensure data quality and reliability.

Property Manager to oversee daily operations and administrative activities of residential properties and condominiums. Coordinate service providers, manage resident relations, and ensure compliance with legal and contractual obligations.

Senior Business Intelligence Consultant needed for strategic reporting and analytics solutions in a financial environment. Requires 5+ years of experience in BI, data analytics, or reporting with strong SQL skills and Power BI expertise.

Founding Site Head & Program Director for a new sterile pharmaceutical manufacturing facility in Portugal. Requires 10+ years of experience in pharma, biotech, CDMO, or regulated manufacturing with proven success in greenfield projects, site start-ups, or major capital projects.

ZTE seeks an Account Manager/Specialist to manage customer relationships in the Portuguese market. Responsibilities include market research, client visits, tender preparation, and project scope determination. Requires a bachelor's or master's degree in a relevant field and 3-5 years of telecommunications sales experience.

Software Tester will design and implement test cases for manual and automated testing in complex software environments. Responsibilities include developing and maintaining automated tests, executing functional, regression, UI, and API tests, and collaborating with developers and stakeholders.

Provides operational and coordination support for international assignments, relocations, and transfers. Prepares assignment-related documentation, supports cost estimate preparation, and partners with vendors to ensure smooth employee experience. Maintains mobility data, tracks immigration documents, and assists with visa applications.

As a Principal Software Engineer focused on Quality Engineering, you will design and implement automated testing frameworks, build test infrastructure, and embed quality gates into CI/CD pipelines. You will drive improvements in test coverage and reliability, participate in design discussions, and partner with backend engineers to improve testability.

IEFP internship for a motivated trainee interested in hospitality. Support check-in/check-out, reservations, and administrative tasks. Fluency in English and Portuguese required.

Senior Java AI Engineer to design, develop, and deploy microservices. Experience with Java, Spring Boot, SQL, DevOps tools, and AI tools required.

Senior AI Engineer will design, build, and maintain scalable microservices using Java and Spring Boot. Responsibilities include architecting autonomous AI agents, integrating LLMs, and ensuring system reliability. Requires a Bachelor's degree, 8+ years of experience, and Java development expertise.

This role involves technical CRM campaign execution, data organization using Google Docs and Sheets, and quality assurance across projects. The ideal candidate has strong attention to detail, communication skills, and proficiency in English.

Founding Account Executive to drive full sales cycle, convert inbound demand, and manage mid-market and enterprise opportunities. 3+ years B2B SaaS sales experience with proven quota exceeding track record required.