freelance English-speaking jobs in Barreiro

Lead the design, development, and delivery of high-quality Android applications. Act as a technical authority, mentor engineers, and collaborate with cross-functional teams.

Support businesses in managing and optimizing their online advertising campaigns. Assist clients with Google Ads products and advertising strategies. Provide recommendations to improve campaign performance. Maintain strong relationships with business clients.

Software Engineer with 5+ years of experience in Python and/or Java, advanced SQL and Grafana skills, and fluency in English (B2 level) sought. Hybrid role, 3 days per week in Porto, Portugal. Must be based in Portugal with Portuguese or EU citizenship or a valid Portuguese work permit.

Software Engineer needed for a legacy banking UI modernization project. Requires expertise in JavaScript, TypeScript, React.js, Node.js, and related technologies. Experience with automated testing, cloud deployments, and financial services is a plus.

Senior Backend Engineer to design, develop, and maintain data systems using Python, FastAPI, and AWS services. Requires expertise in RESTful API design, NoSQL databases (MongoDB), and cloud automation.

Senior SAP P2P (Accounts Payable) Consultant to lead design and optimization of P2P processes in SAP S/4HANA Retail. Drive fit-to-standard approach ensuring compliance, efficiency, and user adoption.

Dutch-speaking Order to Cash Specialist to manage end-to-end O2C processes, including invoicing, accounts receivable, and payment follow-ups. Requires fluency in Dutch and English, a bachelor's degree in a relevant field, and minimum 6 months of experience in accounts receivable or finance operations.

Lead payment and fraud analytics strategy, driving data-driven decisions to optimize financial performance and protect the gaming ecosystem. Define and execute payment analytics vision, analyze payment data using SQL, and create dashboards to inform strategic decisions. Implement strategies to reduce payment declines and identify conversion bottlenecks. Develop detection logic to identify bonus abuse and multi-accounting patterns. Collaborate with cross-functional teams to build risk-scoring models.

Senior Product Analyst will partner with Product, Risk, and Commercial teams to design data structures, ensure data quality, and create dashboards for decision-making. Responsibilities include building activation metrics, developing data structures and dashboards, translating business questions into analytical frameworks, and partnering with teams on strategic initiatives. Requires 4+ years of experience as a Data or Product Analyst, ideally in fintech or consumer digital products, with proven expertise in A/B testing, SQL, Tableau, and Python.

The Security Operations Manager leads the team responsible for protecting the global IT estate. This role oversees day-to-day security operations, guides incident response activities, and drives continuous improvements to the security posture.

Experienced Data Center Technician needed for on-site work in Lisbon, Portugal. Perform hardware installations, cabling, server racking, and troubleshooting. Must have 2+ years of data center experience, strong cabling skills, and ability to lift 50+ lbs.

Senior Data Analyst needed for a 3-month project supporting a product migration. Responsibilities include mapping legacy data structures into a new product model, identifying data gaps and inconsistencies, and collaborating with multiple teams to ensure data accuracy and completeness. Requires advanced SQL skills, experience with relational databases, and strong communication and problem-solving abilities.

Data Engineer to design and deliver cloud-based data solutions. Will work with customers to understand their needs and translate them into actionable architectures and data platforms. Requires experience with cloud platforms, data services, SQL, Python, and ETL/ELT processes.

Provide French-speaking customer support via phone, email, and chat. Assist with telecom service and product inquiries, resolve issues, and maintain customer records. Must be fluent in French and have strong communication and problem-solving skills.

KCS IT seeks a Full Stack Developer with +4 years experience in Java 8+, Spring Boot, Angular 8+, and relational/NoSQL databases. Must have experience with version control, automated testing, and CI/CD tools. Knowledge of Docker, Kubernetes, and web application security is a plus.

TAGETIK Senior Business Analyst supports financial project portfolio management and reporting tool evolution. Responsibilities include analyzing user needs, providing expertise for projects, and administering reporting tools. Requires 5+ years of experience in IT or financial project management, relational database administration, and proficiency with Business Objects.

Link is seeking a Mid-Level Java Developer to develop and maintain backend solutions. Requires experience with Java programming, object-oriented design, SQL, TDD/BDD, Continuous Delivery, microservices architecture, and API design. Knowledge of Kafka is a plus.

Purchasing Specialist supports the achievement of strategic purchasing and procurement objectives. Manages assigned categories, sources and negotiates with suppliers, and monitors performance.

Freelance Graphic/Web Designer to shape brand identity across marketing materials and website. Must have website building experience, Framer (or similar) and Figma/Adobe Creative Cloud proficiency. English fluency required.

Provide customer support for Website Solutions clients via phone, email, and chat. Troubleshoot technical issues and guide users. Must have at least 6 months of customer service experience, native or C1 German, and B2 English.