freelance English-speaking jobs in Valongo

Lead Data Scientist to own end-to-end machine learning projects, translating business challenges into production-ready solutions. Lead technical design, collaborate with cross-functional teams, and mentor junior Data Scientists. Requires 5+ years of experience in Data Science/Machine Learning, proven track record of delivering production-grade ML systems, and strong Python and ML framework experience.

Fullstack Developer with strong Java, Spring Boot, and Angular experience sought. Must have hands-on experience with Github Copilot Agents, including design, configuration, and integration into development pipelines. SQL, CI/CD, and Agile methodologies knowledge required. Fluent English essential.

The Business Development Manager – Europe will drive market adoption and revenue growth of FORTA's asphalt fiber reinforcement technologies across European markets. This role focuses on market development strategy, specification influence, partner engagement, and direct sales.

Leads product development and architectural specification for Yellow, the architectural lighting brand of Aron Light. Defines product roadmap, collaborates with design and engineering, and engages with architects and lighting designers.

Cloud Engineer to support configuration, deployment, and management of Azure environments. Responsibilities include implementing cloud solutions, monitoring cloud environments, and participating in Infrastructure-as-Code tasks. Requires knowledge of Azure services, scripting, and version control. Microsoft Certified: Azure Fundamentals required.

Designs, tests, and optimizes temperature and humidity control systems. Develops refrigeration circuits, builds prototypes, and analyzes test data. Collaborates with various teams on co-development and special builds. Provides technical support to Sales and After-Sales.

Neotalent Conclusion seeks a Strategic Communication Specialist to create executive-level PowerPoint presentations for a key energy sector client. The ideal candidate will translate data into clear insights and narratives, structure content with strong storytelling, and collaborate with teams to synthesize information.

BloodFlow seeks a Medical Data Engineer to structure medical knowledge from sources like drug leaflets and clinical guidelines. Responsibilities include building and maintaining a clinical knowledge graph and validating AI pipelines.

Experienced Software Engineer (Expert/Lead) to modernize a global private bank's eBanking and mobile banking channels. Develop and enhance applications, contribute to architectural improvements, and support frontend and backend redesign. Strong Angular expertise and Spring Boot/Java/Kotlin experience required.

Citrix Specialist needed with 3-4 years of experience in enterprise Citrix environments. Expertise required in Citrix CVAD, NetScaler/ADC, ADM, and WEM. Strong PowerShell scripting and Agile experience are also needed. Fluent English required.

Papayya seeks a visionary AI Software Engineer to develop AI pilots and core projects. Responsibilities include identifying AI integration opportunities, designing and deploying AI-powered software, and integrating AI solutions with existing systems. The ideal candidate has experience with AI, particularly LLMs, and demonstrates proactivity, responsibility, and autonomy.

Carries out performance testing using manual and automated tools to validate software applications and infrastructure. Designs, develops, and executes performance test cases and scripts, analyzes product specifications, and tracks test progress and metrics. Provides support and mentoring to distributed project teams on performance activities.

Provide technical support in colorimetry and color solutions for internal and external customers. Manage color development, delivery, and the color database. Identify business opportunities and collaborate with Sales. Conduct technical demonstrations and trainings.

Implement and maintain backend for web applications, migrating from legacy frameworks. Build and maintain efficient, reusable, and reliable code. Ensure application performance, quality, and responsiveness.

Network Administrator needed for client in Porto. Requires strong technical knowledge of Spanning Tree, OSPF, BGP, MP-BGP, EVPN, Multicast, Cisco ACI, and Cisco/Arista CLI. Experience with large-scale network architectures, NSX, automation/programming (Ansible, Python), and high-constraint environments is essential. Responsibilities include network supervision, incident handling, configuration, support, and automation.

The Data Management Analyst supports the Data Management Lead in operating the Data Domain Management framework. Responsibilities include data quality remediation, data definition and documentation, data lineage support, and KPI monitoring and analysis.

Data Engineer with 4+ years experience in cloud environments, specializing in Snowflake, DBT, and SQL. Designs, builds, and optimizes scalable data solutions, collaborating with stakeholders to translate business needs into technical architectures.

DevOps/CloudOps Engineer will manage Windows and Linux systems in cloud environments, automate tasks, design and maintain cloud infrastructure, and build and manage CI/CD pipelines.

Senior Backend Engineer to design and scale high-performance cloud-native services. Build APIs, integrate with machine learning workflows, and optimize data models. Requires 5+ years experience in backend systems, proficiency in a modern programming language, and database design expertise.

Automation Engineer will implement BMS (Building Management Systems) projects in Portugal. Responsibilities include technical preparation, planning, and on-site support. Requires 3+ years experience in building energy systems, HVAC, and BMS, a Bachelor's degree, and proficiency in programming (SQL, LUA, etc.). Native Portuguese speaker with good English is required.