freelance English-speaking jobs in Valongo

Senior ReactJS Developer sought for complex, enterprise-level projects. Requires 4-6 years of experience with JavaScript, TypeScript, React, HTML, and CSS. Strong communication skills in Portuguese and English are essential.

Analyze browser extension code for security vulnerabilities using static and dynamic analysis techniques. Perform code review, reverse engineering, and debugging to identify malicious behavior and security risks. Document and report vulnerabilities, support takedown efforts, and audit internal review tools.

Experienced AS400 Developer needed to support and enhance critical business applications on the IBM i platform. Develop, maintain, and enhance applications using COBOL, RPG/RPGLE, SYNON, CL, and DB2 for i. Provide production support, incident resolution, and batch processing.

Customer Support Advisor fluent in French and English needed for international customer experience operation. Handle a variety of customer requests via phone, email, live chat, and online platforms. Resolve inquiries, provide accurate information, and ensure customer satisfaction.

Senior Business Travel Consultant provides customer support via chat, calls, and emails, managing complex travel arrangements and ensuring compliance with travel policies.

Edit and proofread Portuguese-language content for grammar, spelling, punctuation, syntax, and clarity. Ensure consistency in tone, style, formatting, and terminology. Improve structure, readability, and logical flow.

System Engineer needed for R&D team to deliver grid-compliant electrical architecture for BESS plants. Responsibilities include power conversion, grid compliance, and electrical system design.

Experienced Data Engineer sought to build scalable solutions on AWS. Requires proficiency in AWS services for Big Data and analytics, distributed data processing frameworks (e.g., Apache Spark), and programming languages like Python, Scala, or Java.

Leads market growth by translating business objectives into actionable plans, managing demand forecasting, and tracking performance. Establishes and governs campaign, pricing, and promotional ROI frameworks. Plans, executes, and evaluates product launches, promotions, and commercial campaigns. Identifies growth initiatives through data analysis and partners cross-functionally to ensure aligned execution.

Global Rewards Senior Analyst will manage end-to-end administration of global Long-Term Incentive (LTI) plans and act as the operational lead for annual salary review and bonus cycles. Responsibilities include ensuring rewards processes are delivered in line with global policies, overseeing data validation and payroll interfaces, and driving continuous improvement initiatives. The role requires 3-5 years of experience in compensation or reward operations within a global organization.

Junior Frontend Engineer will build and maintain UI components for a SaaS-based anti-money laundering platform. Collaborate with backend engineers and participate in design discussions and code reviews. Must have experience with TypeScript and React.

Executes operational sub-processes, manages vendor master data and invoices, and ensures timely payment processing. Requires 2+ years of accounting experience, a bachelor's degree in accounting or finance, and strong understanding of accounting and accounts payable processes. Must be able to work independently, escalate issues, and possess strong communication and organizational skills. SAP knowledge is desirable.

Evaluates health-related prompts, making judgments based on guidelines to support machine learning. Provides feedback on AI model output, focusing on areas like helpfulness, factuality, and cultural appropriateness. Documents issues and collaborates with team members. Requires native German fluency and strong analytical skills.

The Platform Engineering Compute team builds and maintains Kubernetes Operators, automates cloud infrastructure, and contributes to the self-healing capabilities of applications. Responsibilities include developing playbooks, maintaining the product deployment pipeline, and participating in incident response.

SAP SuccessFactors Preferred Success seeks a Functional Specialist to deliver adoption and consumption focused services and workshops across the SAP SuccessFactors Suite. The role requires Associate Certification in Compensation and Variable Pay and one other SAP SuccessFactors Talent Suite module, plus 3-5 years' experience in Compensation and Variable Pay implementation and/or optimization.

Data Scientist to develop and implement data science solutions, including generative AI and machine learning models. Collaborate with teams to identify opportunities for data-driven decision-making and automate tasks. Utilize Python, statistical analysis, and cloud services to generate insights.

Research Studentship for Master or Integrated Master students within the HELIPORT project. The scholarship will evaluate reliable calculation models for axial resistance of helical screw piles. Duration: six months.

Data Engineer to design, build, and maintain batch and real-time data pipelines for analytics, machine learning, and business intelligence. Will support Data Scientists in deploying and monitoring models. Requires experience with distributed data processing, containerization, and Python.

Billing Specialist will review, issue, and track invoices for U.S. healthcare companies, ensuring accuracy and efficiency. Responsibilities include resolving billing discrepancies, maintaining financial records, and collaborating with clients and internal teams. Strong English communication and problem-solving skills are required.

InnoWave seeks a Senior .Net Developer in Lisbon to build scalable solutions using .NET Core, .NET/C#, and AWS.