freelance English-speaking jobs in Valongo

Unity Developer needed to design, implement, and optimize game features using the Unity engine. Collaborate with artists and designers to integrate assets and troubleshoot technical issues. Requires a Bachelor's degree, 2+ years of experience, proficiency in C#, and knowledge of Unity's animation, physics, and UI/UX.

Python Developer needed for railway ticketing integration and supplier onboarding application development. Requires 4+ years of commercial experience, including Senior Developer experience, with Python, Django, FastAPI, PostgreSQL, Redis, and strong AsyncIO skills.

Senior Account Manager will focus on commercial activities such as identifying upsell and cross-sell opportunities, negotiating contracts, and meeting booking quotas. The role requires strong communication and relationship-building skills and a minimum of 5 years of experience in sales or business development within the retail or hospitality payment industry.

IT Operations Engineer will ensure production, infrastructure, monitoring, and security requirements are met throughout the project lifecycle. Collaborate with Agile teams, developers, and infrastructure specialists to improve operational efficiency and service reliability.

Develop and maintain user-friendly web applications using HTML, CSS, and JavaScript. Collaborate with designers to implement website designs and optimize for speed and scalability.

Warehouse Coordinator to manage and support warehouse and customer service teams, ensuring efficient order handling and dispatch of medical products.

Lead and develop software engineering, architecture, and QA teams across three groups. Drive performance management, growth, and technical excellence. Own engineering hiring, onboarding, and organizational scaling. Ensure high-quality software delivery and continuous improvement of engineering processes. Collaborate with product leadership and architects on technical direction and roadmap execution.

Senior Data Scientist will design and deliver real-time machine learning models to protect GoCardless' global payment network. Responsibilities include contributing to the full model lifecycle, designing real-time ML systems, and collaborating with engineers, fraud analysts, and product managers.

Provide German and English customer support via phone and written communication. Build customer relationships and resolve inquiries. Must be a German native or fluent with advanced English skills.

Sound Technician needed to interpret audiovisual plans and set up/operate sound systems, lighting, and image playback platforms for indoor/outdoor productions.

The SAP SD Consultant will provide support for Airbus's S/4 HANA SAP solutions, covering accounts receivable, payables processes, and travel expenses. Responsibilities include incident and functional support, system evolution requests, and process improvement. The ideal candidate will have experience in finance/IT, understanding of business processes, and strong analytical and communication skills.

Support Manager will define support concepts and processes, oversee support transitions, and ensure support case resolution. Requires 3+ years of experience managing IT support processes, coordinating knowledge transfer, and defining support operating models.

Communication & Marketing Intern to support digital and institutional content creation. Responsibilities include managing social media, producing content, and assisting with marketing campaigns.

The Engineer Specialist leads the development and execution of engineering projects, ensuring compliance with industry standards and business requirements. This role involves risk assessment, project monitoring, and technical support for utilities, support systems, and equipment.

Develop and enhance SAP EWM solutions for warehouse and logistics operations. Build customizations, troubleshoot issues, and collaborate with teams to deliver reliable solutions.

As the Employee Central Core/Time Management Specialist, you will be a technical owner of SuccessFactors solutions, translating business requirements into system configurations and driving maintenance, troubleshooting, and deployment of changes. You will collaborate with stakeholders, design solutions aligned with SAP best practices, and ensure updated documentation and process governance.

Experienced Operations Director to lead and evolve operations across Portugal, ensuring consistent, high-quality care and driving financial performance.

Junior Trading Operations Specialist will monitor and manage automated trading systems, optimize workflows using Python and Bash scripting, and collaborate with teams to resolve issues.

Senior Site Reliability Engineer to design, operate, and improve large-scale developer infrastructure and internal tooling platforms. Responsibilities include building reliable systems, analyzing user feedback, optimizing performance, and collaborating with engineering teams. Requires experience in Site Reliability Engineering, Software Engineering, and programming languages such as Java, Kotlin, Go, Python, or Ruby.

Data Engineer to design, develop, and optimize scalable data solutions using Python, PySpark, and Databricks. Build data pipelines, collaborate with cross-functional teams, and manage data workloads in Azure Cloud environments.