freelance English-speaking jobs in Maia

BlackBox Strategies seeks a Marketing Automation Specialist to own outbound and lifecycle messaging for B2B and B2C audiences. This role requires hands-on experience executing email and CRM campaigns, understanding deliverability, segmentation, and channel tradeoffs. The ideal candidate will collaborate with leadership and the Social Media Manager to align messaging and timing.

Experienced SEO Link Builder to secure white-hat backlinks for casino clients. Responsibilities include link delivery, outreach campaigns, competitor analysis, and performance tracking. Requires proven experience building links in the casino niche and proficiency with SEO tools.

Design, develop, and maintain cloud-based EMS/NMS and Inventory Management solutions. Implement OSS functionalities across NMS, Inventory, Assurance, and Fulfilment domains. Develop and customize inventory and topology data models.

Key Account Manager to build commercial relationships, drive sales performance, and deliver excellent customer experience for a portfolio of retail accounts. Requires proven experience in key account management or retail sales management, strong commercial and negotiation skills, and excellent communication and stakeholder management skills.

Research Initiation Grant for a Research Assistant to study and develop technologies for H2 production within the framework of Agenda “H2Driven Green Agenda”. The grant is for 3 months, with the possibility of renewal, and is open to students enrolled in a higher technical professional course, bachelor's degree, integrated master's degree, or master's degree in Chemical Engineering or related areas. The successful candidate will monitor the state of the art regarding hydrogen production technologies, prototype, test, and validate a hydrogen production unit, and disseminate and communicate the results.

QA Consultant to execute functional, regression, and exploratory tests. Identify and report defects throughout the development lifecycle. Validate data using relational databases and collaborate with development, product, and business teams in Agile environments.

Analyst will define and implement quality control techniques to verify the quality of raw materials, intermediate and end products. Responsibilities include managing quality control activities, performing sample analysis, maintaining laboratory records, and ensuring compliance with GMP requirements.

Salesforce Application Specialist needed to provide support, resolve issues, and perform administrative tasks for the Salesforce platform. Must have foundational Salesforce experience, strong problem-solving skills, and excellent communication abilities.

Frontend Developer to lead the development and UI/UX maintenance of web portals, ensuring they are visually appealing, intuitive, and user-friendly.

As a Vulnerability Operations Consultant, you will deliver key projects around penetration testing and automated penetration testing. Responsibilities include assisting with penetration test planning, organizing meetings, and coordinating logistics. You will also support automated penetration testing platforms, onboard new applications, and document processes.

Research Initiation Grant for a Research Assistant to study and develop technologies for H2 production within the framework of Agenda “H2Driven Green Agenda”. The grant is for 3 months, with the possibility of renewal, and is open to students enrolled in a higher technical professional course, bachelor's degree, integrated master's degree, or master's degree in Chemical Engineering or related areas. The successful candidate will monitor the state of the art regarding hydrogen production technologies, prototype, test, and validate a hydrogen production unit, and disseminate and communicate the results.

Product Designer will design and evolve B2B internal platforms and backoffice tools. Responsibilities include participating in problem definition, solution design, and product evolution. Collaborate with Product Managers, Developers, and other Designers. Apply UX and UI principles with attention to detail and high-quality execution. Utilize and contribute to design systems and reusable components. Communicate design decisions based on research, data, and business objectives. Work autonomously while aligning with product roadmaps and team goals.

Software Engineer to develop and integrate software components for Cloud RAN applications. Will work with global teams to design, implement, and test software while ensuring high-quality standards.

Scrum Master to join a center of excellence for a leading multinational Fintech company. Minimum 5 years experience as a Scrum Master, Agile Coach, or Agile Delivery Lead required. Scrum Master certification and understanding of Agile principles and frameworks (Scrum, XP, Kanban) are essential. Experience with Agile Estimating & Planning, Scrum ceremonies and artifacts, and Agile Practices related to Software Engineering is needed.

Lead the design and implementation of application security measures, including encryption, secure APIs, and identity management. Conduct threat modeling, risk assessments, and code reviews. Act as a Subject Matter Expert for security breaches, developing corrective actions. Mentor junior engineers and collaborate with engineering and product teams to integrate security into software development lifecycles.

Trainee Civil Engineer to participate in the design and development of industrial roads and platforms for energy projects. Responsibilities include contributing to earthworks, drainage systems, and road layouts, preparing technical drawings, and collaborating with multidisciplinary teams. Bachelor's degree in Civil Engineering required. Fluency in English and experience in the energy sector is a plus.

Senior .NET Software Engineer to design, implement, and lead scalable distributed systems using .NET, Azure, and microservices. Experience with event-driven architectures, container orchestration, and infrastructure as code is required. Fluency in English is mandatory.

Retention Advisor for a leading online travel agency. Responsible for customer service, retention campaigns, and identifying solutions to customer issues. Requires native or fluent Portuguese and advanced English, proven sales experience, and excellent communication skills. Must be a local candidate with EU citizenship or a valid work permit.

Project Planning Lead will oversee project baselines from initiation to completion, acting as the owner's representative. Responsibilities include schedule baseline establishment, delay acceleration efforts, and monthly progress reporting. The role requires experience with P6, strong communication skills, and proficiency in MS Office Suite.

Regional Payroll Specialist will oversee future payroll processes in Europe, ensuring accurate and compliant payroll delivery across multiple countries. Responsibilities include managing end-to-end payroll processes, collaborating with external payroll partners and internal stakeholders, and driving process harmonization and automation. Requires a degree in a related field, 3+ years of multi-country payroll experience, and proficiency in SAP-based payroll, SuccessFactors HCM, and advanced Excel.