freelance English-speaking jobs in Barreiro

At KEENFINITY, we are a globally leading provider of innovative and professional security and communication solutions. With over 4,200 employees in over 50 countries worldwide, our ambition is clear: we offer more than just technology – we secure, connect, and amplify the moments that matter in life. Next to our passion for technology we're very passionate about our work environment.

Cybersecurity Manager to lead and coordinate Blue Team operations, ensuring effective and results-driven cyber defense. Requires deep technical expertise, incident response, threat analysis, and experience with SIEM, SOAR, EDR, and security automation. Proven experience in a 24x7 MSSP environment with strict SLAs is essential.

Requirements: At least 5 years of experience with Citrix. Involved in design and implementation of Citrix & VDI infrastructure projects. System Configuration & tuning of Citrix & VDI environments. 3rd line supporting (troubleshooting, incident and change management). Preparing and executing planned maintenance/upgrades (security patching, operating system and tooling upgrades, . . . ).

Senior Machine Learning Engineer will build and deploy robust ML systems for search, tune LLMs, and improve business KPIs. Responsibilities include improving recall, developing visual solutions, and collaborating with other teams. Requires 3+ years of experience in applied machine learning, excellent NLP knowledge, and experience with production ML systems.

Product Owner for Cybersecurity Application will structure project transitions, manage incident backlogs, and analyze tickets. Requires experience in data and business intelligence projects, Azure Data Factory, Snowflake, Power BI, SQL, and Agile methodologies.

Field Sales Representative will hunt for new business, close deals, and grow their territory. Responsibilities include prospecting, running merchant meetings, and explaining the value of payment solutions. Proven experience in outside sales and a track record of hitting sales targets are required.

Holafly seeks a results-driven B2B Account Executive to drive enterprise sales in Portugal and Spain. You will develop go-to-market strategies, identify new business opportunities, and build relationships with senior stakeholders.

Senior Automation QA Engineer will define and execute the end-to-end QA strategy for a browser-based product. Responsibilities include designing and building automated tests, ensuring browser and device compatibility, and validating performance and stability. The ideal candidate will have experience with various testing approaches, modern testing tools, and programming languages (TypeScript/JavaScript preferred).

Senior consultant with 5+ years of experience in public transport and sustainable mobility sought. Must have experience in transport planning, public transport modeling software (PTV Visum preferred), GIS tools, and data analysis. Strong analytical, communication, and team management skills required.

Lead the implementation, scaling, and growth of platform software solutions for business verticals. Translate business needs into technical tasks, design scalable architectures, and ensure system integration. Manage project timelines, prioritize activities, and deliver features on time. Mentor engineers, promote best practices, and foster a collaborative engineering culture.

Senior Customer Success Manager will lead customer onboarding, build relationships, and drive customer satisfaction and growth. Requires 5 years of experience in a related role, strong communication skills, and the ability to manage multiple accounts. Experience in SaaS, HR, payroll, or global employment solutions is a plus.

St. Julian's School seeks a Data and Systems Manager to architect and manage the school's information ecosystem. Responsibilities include optimizing iSAMS, managing data collection and maintenance, overseeing integrated systems architecture, and ensuring data security and compliance. The ideal candidate will have experience managing School Information Systems, proficiency in SQL and data visualization tools, and strong communication and problem-solving skills.

Salesforce Data Specialist needed with a degree in Computer Engineering or related field. Solid front-end development experience (ES6, HTML5, CSS3) and mastery of JS, jQuery, jQuery UI, and JSON required. Knowledge of React and/or React Native, full-stack architecture, and software engineering practices (Git, unit testing, etc.) is essential. Experience with mobile application development (iOS, Android, MS) is a plus.

DevOps Engineer to ensure technical environment stability and operational condition. Define and implement technical solutions, integrate infrastructure requirements, and drive automation and performance enhancements.

Nezasa seeks an ABM & Demand Generation Manager to orchestrate account-based marketing programs and drive demand generation through paid advertising. This role combines strategic ABM execution across all tiers with hands-on paid media management. Responsibilities include account research, personalized outreach, campaign orchestration, performance optimization, and pipeline acceleration.

JobHire.ai seeks a passionate social media manager to build and grow our organic reach across platforms like Instagram and TikTok. You'll develop content strategies, create engaging content, and foster a vibrant online community. Proven experience scaling channels to 500k-1M+ monthly organic impressions is required.

Freelance annotators review and classify text, images, or videos to train AI. Must have a university degree and be proficient in Portuguese (C2) and advanced in English (B2 or higher). Work is project-based and available when projects are active.

Supports innovative scalable sales programs across diverse customers, focusing on revenue and product adoption. Provides consultative support on agency and advertiser accounts, drives communications, and resolves technical issues.

Full-stack developer focused on building web applications using Node.js, React, and TypeScript. Responsibilities include developing new features, maintaining existing systems, and collaborating with teams to ensure seamless integration. Requires 5+ years of Node.js back-end development experience, experience with React, Docker, and Azure cloud services.

Support HR operations within a fast-growing international company. Assist with on- and off-boarding, HR inquiries, database maintenance, and employee data management.