freelance English-speaking jobs in Valongo

Commission mechanical and process systems at power plant construction sites globally. Ensure commissioning activities meet budget, time, and quality targets while adhering to EHS requirements. Collaborate with internal and external teams.

Senior Mapping & Localization Engineer will design and implement SLAM pipelines, improve localization robustness, and develop workflows for map alignment and merging. Requires a BS/MS in a related field and 5+ years of experience in robotics, mapping, computer vision, or geospatial systems. Strong skills in SLAM, localization, sensor fusion, geometric optimization, and 3D reconstruction are needed. Experience with GTSAM, Ceres Solver, PCL, OpenCV, ROS, and PROJ is preferred.

Recent graduates with a degree in Computer Science or a related field are sought to support data analysis, AI development, and process automation in real projects.

Leads marketing and GTM strategy across four target markets, including brand development, content creation, and PR. Manages founding-member sales pipeline, from initial contact to closing deals. Requires 7-15 years of experience in luxury hospitality, membership clubs, or similar industries. Must be AI-native and comfortable with Portuguese, Brazilian, UK, and Gulf cultural codes.

Senior Commissioning & Control Systems Engineer will design, integrate, and commission PLC-based control systems for electromechanical environments. Responsibilities include developing control logic, defining system integration requirements, producing documentation, and executing system testing and commissioning. Requires a degree in Systems Engineering or related field, 5+ years' experience in control systems/PLC engineering, and strong expertise in system integration and electromechanical automation.

Senior Full-Stack Developer to design, build, and own full-stack systems using Golang and Vue. Collaborate with teams across the software development lifecycle, ensuring quality standards and resolving production issues.

Develop and execute sales strategies to grow market share in France. Identify and develop new business opportunities across target industries. Manage long sales cycles and build relationships with OEMs, suppliers, and integrators.

Provide customer support via phone and email for a leading international car rental service. Manage bookings, modifications, cancellations, and billing inquiries.

Connectivity & Lead Network Engineer will drive network planning and optimization initiatives across 2G, 3G, 4G, and 5G networks. Responsibilities include leading optimization activities, validating technical performance of telecom solutions, and mentoring engineers.

Design, build, and scale intelligent AI-powered solutions using machine learning and generative AI technologies. Develop robust AI application architectures and contribute to innovation.

Support the design, development, and maintenance of Android applications for enterprise and industrial use cases. Contribute to writing clean, maintainable, and testable code. Collaborate with backend and platform teams to support integration and ensure smooth functionality across devices.

SQL Server Database Administrator needed to ensure performance, availability, and reliability of databases within a complex ecosystem. Responsibilities include query optimization, performance issue resolution, backup/recovery management, and data consistency across platforms. Requires 5+ years of SQL Server experience, T-SQL expertise, and experience with HA/DR strategies.

Black Cat Cinema seeks a Comms & Marketing Manager to lead communication across social media, newsletters, and marketing channels. The role involves creating engaging content, managing community interaction, and collaborating with creative teams. Fluency in Portuguese and English is required.

We are seeking a Project Manager with strong Content Management capabilities to support and coordinate the marketing function. This role is responsible for managing the marketing calendar, campaign planning, asset production timelines, and cross-department coordination. The ideal candidate combines operational rigor with editorial precision and has a strong understanding of trading platforms and digital products.

KCS IT seeks a Mid-Senior Python Developer with a degree in a related field and 3+ years of experience. The ideal candidate will have strong Python skills, experience with web frameworks (Django, Flask, FastAPI), and front-end frameworks (React or Angular). Fluency in English and Portuguese is required.

DevOps Proxy to bridge clients, development, and infrastructure operations. Set up, deploy, and manage environments and microservices. Support customer environments and provide consulting. Research and experiment with technologies to improve processes. Define deployment stack architecture and oversee release management. Experience with Kubernetes, OpenShift, or similar technologies and a public cloud provider required. Fluent English.

Reviews high-risk consumer and transaction monitoring alerts for potential money laundering or terrorism financing. Escalates findings for further investigation. Requires experience in KYC, EDD, AML, Transaction Monitoring, or Compliance within financial services.

Data Specialist dedicated to Customer Service for a telecommunications operator. Analyzes operational data to optimize performance and customer satisfaction. Develops SQL queries, Power BI dashboards, and Python automation scripts. Collaborates with IT, Marketing, and Customer Service teams. Requires 3-5 years of experience and proficiency in SQL, PostgreSQL, Power BI, and Python.

Leads industrialization and manufacturing of aerospace parts, collaborating with cross-functional teams. Develops technical documentation, manages risk, and supports quality assurance. Requires a Bachelor's degree in a relevant field and 5+ years of experience in aerospace manufacturing.

Billing Specialist needed for a fast-paced law firm. Prepare, review, and issue invoices accurately and on time. Work closely with partners and internal stakeholders to ensure billing accuracy and client satisfaction. 2-5+ years of experience in billing, accounts receivable, or finance operations required. Familiarity with AI-assisted billing tools and open to AI-augmented workflows.