freelance English-speaking jobs in Maia

The Senior Data Engineer will design and build Causeway's next-generation data platform on Databricks. Responsibilities include designing and owning the medallion pipeline, ensuring data quality and governance, and providing technical leadership. The role requires strong experience with Databricks, Delta Lake, Python, PySpark, SQL, and lakehouse architectures.

Java Spring Boot Middle Developer sought for national and international projects. Requires 3-5 years of Java experience, including API development in distributed systems. Experience with Spring Boot, relational and non-relational databases is essential.

Provide B2B travel support via chat, phone, and email to German-speaking customers. Manage bookings, resolve travel issues, and ensure compliance with travel policies.

Manage the end-to-end card dispute process for merchants under Visa and Mastercard schemes. Analyze transactions, prepare representments, and collaborate with banks and merchants to resolve disputes. Monitor chargeback trends, support risk mitigation, and ensure compliance with scheme rules.

HAVI Technology seeks a VMO Specialist to join their Lisbon TechHUB. This fixed-term role supports the Vendor Management Office, governing the full vendor lifecycle and coordinating between Technology, GBS Sourcing, and Legal.

Retail Sales Assistant to provide excellent customer service and support daily shop operations including sales, merchandising, receiving, and inventory.

Database Engineer to manage and optimize database infrastructure across on-premises, AWS, and OCI environments. Responsibilities include database administration, performance tuning, replication, automation, and collaboration with development teams. Requires 3+ years of experience with Oracle, MySQL, PostgreSQL, and automation tools.

Bridge351 seeks a QA Functional Tester to create, execute, and maintain test cases for functional and API-based systems. The role involves validating requirements, executing tests in virtual environments, and ensuring high-quality software delivery.

Data Scientist will design and develop product prototypes based on financial and travel spend analysis, utilizing Python, R, JavaScript, or Tableau. This role translates analytical insights into actionable tools, working with engineering teams to operationalize data science workflows.

Designs, develops, and maintains BI solutions, including reports, dashboards, and data models. Translates business requirements into scalable data models and visualizations. Builds and optimizes ETL/ELT processes.

Content Moderator ensures e-commerce platform standards, policy compliance, and content safety. Reviews content, adapts to policy changes, and escalates issues. Requires Hungarian C2 and English B2, strong moderation skills, and e-commerce understanding.

Security Analyst to protect organizational information and systems. Responsibilities include conducting security assessments, monitoring networks, implementing security measures, and collaborating with IT teams.

Senior Product Manager to drive roadmap and execution for Intermedia's telecom solutions. Requires 5+ years of Product Management experience, with at least 3 years focused on business voice / UCaaS, telecom services. Deep understanding of SIP, RTP, VoIP protocols, SBCs, and telephony infrastructure.

Develops AI software for wildfire restoration and internal business automation. Builds algorithms to process multi-sensor data and designs workflows using n8n. Integrates LLMs like Claude and GPT-4 for tasks such as proposal generation and reporting. Requires proficiency in Python, JavaScript/TypeScript, and AI/LLM integration.

Experienced Fitter Technician needed for assembly, installation, and repair of machinery and equipment. Must have a high school diploma or equivalent and 2+ years of experience.

Execute technical SEO audits, manage SEO initiatives, and evaluate website performance. Contribute to content and technical implementations to improve discoverability across various search platforms. Provide SEO analyses and recommendations to drive organic visibility.

Senior Business Manager to support company expansion in Portugal. Requires a degree in Engineering, 4+ years of experience in engineering and technology consulting, strong commercial and business development skills, and fluency in English and Portuguese.

Sales Intern to support the Commercial team with sales reporting, data analysis, CRM updates, and commercial support activities.

All-rounder for home and garden management. Performs minor repairs, garden care, janitorial duties, and purchases. Plans renovations, supports construction projects, and ensures building maintenance. Requires vocational training or experience in skilled trades, building management, and strong communication skills.

Promote and sell products to potential customers. Achieve sales targets and build positive customer relationships. Proficiency in English is required.