freelance English-speaking jobs in Guimarães

Who we are With over 25 years of experience, Sysmatch is a well-established name in IT Consultancy and Outsourcing, involved in both national and international projects that promote excellence in technology and services. Our secret? A team that blends talent, creativity, and experience to deliver robust, scalable, and tailored solutions.

Senior User Acquisition Manager to lead Meta Ads efforts across Latam. Manage high-budget campaigns, optimize funnels, and collaborate with creative teams. 3+ years of UA experience, analytical rigor, and creative intuition required.

Provide Polish-speaking customer support via phone, email, and chat. Troubleshoot technical and product issues, collaborate with internal teams, and document customer interactions.

Senior Embedded Software Engineer to extend a mature application (C++, C, embedded domain) for data acquisition and participate in extending OpenDAQ SDK. Will work on software designs, implementation, and testing in collaboration with hardware and testing teams. Requires 5+ years' experience in software development, preferably on Linux platform, with object-oriented programming (modern C++ and C) and multi-threading experience.

We are looking for a Machine Learning Engineer to join a small team designing experimental solutions to optimize vehicle logistics using automated driving vehicles. You’ll work closely with engineering and product stakeholders to understand operational constraints, explore the available data, design and train ML models, and evaluate how well they perform.

Leads a team of Data Scientists focused on revenue optimization, pricing intelligence, personalization, and experimentation. Designs and scales experimentation frameworks and drives the adoption of adaptive optimization approaches. Requires proven experience leading Data Science teams and hands-on machine learning expertise.

Senior Test Engineer Automation will contribute to a US/UAE blockchain-based fintech project. Responsibilities include setting up automated testing environments, creating test documentation, and performing functional, non-functional, regression, and acceptance testing.

The Delivery Manager ensures projects are delivered on time, within scope and to a high quality across multiple internal business units. This role involves coordinating teams, removing blockers, and driving alignment to achieve project goals.

Full Stack Developer (Node.js+ React) with 4-5+ years of experience. Strong Node.js, React.js, JavaScript, TypeScript, HTML, and CSS skills. Experience with relational and non-relational databases, REST APIs, and Git. Fluent English required.

Lead a team of Product Owners, define product roadmaps, and drive digital product strategy for a leading Portuguese retail and services group.

Provide Dutch and English language customer support via phone, chat, and email. Assist with account and technical inquiries, ensuring a high-quality customer experience.

Sales Development Representative to qualify leads, reduce no-shows, and ensure high-quality candidates reach the sales team. Responsibilities include lead qualification, follow-up, and CRM management. Native or impeccable English required.

Senior DevOps/SRE Engineer will design, implement, and maintain highly available and scalable infrastructure on AWS. Responsibilities include building and managing CI/CD pipelines, implementing SRE best practices, and collaborating with development teams. Requires 5+ years of experience in DevOps/SRE/Cloud Infrastructure, strong Linux skills, Kubernetes expertise, and proficiency in Terraform and CI/CD tools. French proficiency is required.

Senior Environmental Engineer to join Business Development team. Conduct Life Cycle Assessments (LCA), coordinate projects, and monitor policies related to climate neutrality and sustainability.

Iterable seeks a Marketing Web Developer to build and maintain its marketing website. Responsibilities include developing and maintaining the new Block Theme-based site, managing lead generation forms built on a React stack, and implementing custom analytics events. The ideal candidate has deep experience with modern WordPress, React.js, and API integrations.

Senior SAP FICO Consultant needed for a 12-month freelance contract. Lead configuration and functional delivery across SAP FI and CO modules within an S/4HANA environment. Support end-to-end financial processes, design financial reporting, and collaborate with cross-functional teams. 7+ years of SAP FICO consulting experience and proven S/4HANA finance implementation experience required.

Own the full sales cycle for AV hardware and cloud solutions, from qualified opportunity to close. Collaborate with BDRs and internal teams to hit revenue targets and grow accounts.

Attune seeks a hands-on AI Researcher to design and implement the core intelligence architecture of its AI-powered coaching product. This role involves translating behavioral theory into computational models, improving longitudinal signal tracking, and building evaluation frameworks for AI reliability. The ideal candidate has experience in applied AI, NLP, and ML systems, with a bias towards building and shipping.

Provides daily support to program and project teams, managing project assets, documentation, and communication. Develops project plans, manages critical paths, and drafts progress reports. Supports financial reporting and builds relationships with stakeholders to ensure project success.

SAP S4HANA Internal Consultants will design and implement the core model for the global S/4HANA project. Responsibilities include process optimization, system integration, user training, and technical feasibility assessments.