freelance English-speaking jobs in Valongo

Senior Distributed Systems & Detection Engineer will design and build a detection engine for financial data using Spark, Iceberg, Trino, and Azure. Requires 5+ years of experience building distributed systems and data-intensive applications with a strong understanding of performance engineering and algorithmic complexity.

Develop and maintain scalable backend microservices using Java Spring Boot or similar frameworks in Azure Cloud. Design and optimize RESTful APIs, implement CI/CD pipelines, and manage SQL and NoSQL databases. Build modern web applications using ReactJS, TypeScript, and state management libraries. Collaborate with cross-functional teams to design and implement software architecture.

Leads operational roadmap from pilot to commercial scale, overseeing supply chain, procurement, and vendor relationships. Implements operational processes and KPIs to ensure on-time delivery. Manages cross-functional operations team and supports market entry execution.

Technical Lead - RAN Engineer will oversee RAN deployments, optimize network performance, and manage team members. Responsibilities include planning and optimization for 2G to 5G networks, drive test analysis, KPI monitoring, and troubleshooting complex network issues.

Design, maintain, and stabilize cloud-based infrastructure for data platforms on AWS and Azure. Modernize infrastructure, migrating from Docker Compose to Kubernetes using GitOps and CI/CD. Troubleshoot issues across infrastructure, Python services, APIs, and databases.

Systems Administrator/OPs Engineer to manage, optimize, and improve core infrastructure systems. Requires strong systems administration expertise, experience with Windows and Linux servers, networking, and security practices.

Site Reliability Engineer will plan, manage, and oversee production environments. Responsibilities include application performance monitoring, incident response, and automation. The role requires expertise in Linux, scripting, ITIL/ITSM, and SQL.

Senior Data Scientist will build data science products, design experiments, and collaborate with stakeholders to optimize features and drive business decisions. Requires experience with predictive modeling, machine learning, and large dataset processing.

Lead the technology vision for large-scale AI programs and client relationships. Design scalable, secure, and high-impact AI architectures. Translate business strategy into AI technology solutions.

Java Developer needed with 3+ years of experience in Java (Spring Boot/Framework), RESTful API design, microservices architecture, and cloud platforms (AWS, Azure, or GCP). Must have experience with Git, containerization tools (Docker, Kubernetes), relational databases, CI/CD pipelines, and excellent problem-solving and communication skills. Fluency in English is required.

Senior Cloud Infrastructure Engineer will define, implement, and maintain IaC for kununu.com applications. Requires 5+ years of experience with AWS infrastructure and Terraform, along with Linux proficiency and CI/CD experience.

The Billing and Time Management Specialist executes day-to-day billing and time management tasks, ensuring timely and accurate invoicing. This role collaborates with internal and external customers to resolve issues and maintain detailed records of customer correspondence.

The ESG Regulatory Coordinator will identify, structure, and monitor sustainability regulations, assess business implications, and translate requirements into actionable insights. This role involves coordinating across functions, supporting compliance activities, and contributing to the development of sustainability structures within the GBS organization.

BrainRocket seeks a Relocation Specialist to manage end-to-end relocation for international employees joining the company in Portugal. This role ensures a smooth, compliant, and people-focused relocation experience while supporting BrainRocket's global mobility operations.

Quality Assurance Engineer needed to participate in the software development lifecycle, define and execute test cases, and collaborate with cross-functional teams to ensure quality.

Cloud Engineer with 3+ years of experience in Microsoft Azure, specializing in building secure and compliant cloud infrastructures. Experience with containers, orchestration platforms (Kubernetes), automation (Terraform, CloudFormation), and scripting languages (Bash, PowerShell, Python) is required. Fluent in English.

Senior Growth & Demand Generation Manager will own the demand generation engine across paid, organic, and Account Based Marketing. Responsibilities include managing the media mix, building high-intent campaigns, and executing personalized ABM programs. The role requires experience with Google Ads, LinkedIn Campaign Manager, GA4, HubSpot, and AI-powered tools.

Support the Product Owner of the Cornerstone On Demand (YES Learning) LMS module across the full product lifecycle. Coordinate BAU activities, manage complex tickets, and support the rollout of a new governance model.

Leads a team of 20 developers, overseeing the full software development lifecycle and ensuring efficient delivery. Manages agile workflows, release cycles, and quality assurance processes. Provides technical guidance and mentorship to the team. Requires 10+ years of software development experience, 3+ years as an Engineering Manager, and proficiency in Java, Spring Boot, Angular, PostgreSQL, Docker, Kubernetes, and Agile methodologies.

Support Extia's growth as a Sales Administration team member. Manage client accounts, create and track project missions, and handle invoicing and accounts receivable.