freelance English-speaking jobs in Valongo

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.

An experienced Internal Control Manager is needed to develop, maintain, and improve the company's internal controls over financial reporting, operational efficiency, compliance, and risk management.

Experienced accountant needed for accurate and compliant accounting data, closings, and reports for European Allianz entities. Responsibilities include running accounting calculations, reviewing month-end and quarter-end closings, supporting regulatory reporting, and administering accounting systems. Requires 4-5+ years of accounting experience, strong technical accounting skills, SAP FI/CO experience, and fluency in Greek and English.

Outbound Sales Development Representative for Datacenter Services in DACH/Benelux markets. Execute 50+ personalized daily touches (email, LinkedIn, phone) to qualify leads and book meetings for the Head of Sales.

Senior Java Backend Engineer to build scalable, highly available core platform services. 7+ years of server-side development experience required, with 4+ years in backend Java and Spring Framework.

Develops sales plans, establishes overseas sales platforms, and manages customer relationships. Leads international exhibition participation. Requires a bachelor's degree, 5+ years of international surgical instrument sales experience, and proficiency in English.

Lead and coordinate production operations to meet targets and drive continuous improvement. Manage production KPIs, quality control, and maintenance schedules. Collaborate with cross-functional teams and train a high-performance production team.

Dynamics 365 Developer to design and develop functionalities, integrations, and solutions. Requires 3+ years of Dynamics 365 CRM experience, Power Platform knowledge, and proficiency in C#, .NET, HTML, CSS, and JavaScript.

Full-Stack Product Engineer will build AI-powered features for Hosto.ai, a vacation rental AI agent. Responsibilities include developing core features using React Next.js & PHP Laravel, integrating Figma designs, and deploying features at high speed. Requires 5+ years of experience with React Next.js & PHP Laravel, proficiency in AI tools (Cursor IDE, Claude Code, Figma MCP), and a demonstrable track record of using AI to accelerate development.

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 Software Engineer to join a client team building innovative products. Requires proven experience with React and Node, JavaScript, GraphQL, and distributed version control systems. Experience with databases, continuous integration, and TDD is also needed.

Produces investments monitoring reports for pension funds, including asset allocation, performance, risk analysis, and strategy updates. Collaborates with other Mercer teams and external entities. Requires fluency in English, a degree in a relevant field, and 3+ years of experience in the investments industry.

Provides high-level administrative and operational support ensuring smooth daily activities. Manages calendars, schedules, correspondence, and travel arrangements. Coordinates internal and external communications and supports budget tracking.

Senior Environmental Engineer needed for Business Development team. Conduct Life Cycle Assessments (LCA), manage projects, and contribute to proposal writing. Requires PhD in Environmental Engineering or MSc with 3+ years experience, proficiency in SimaPro, and experience in carbon neutrality and sustainability.

Lead quality assurance efforts for mobile app projects, overseeing the entire QA lifecycle. Design and implement quality processes, execute functional, usability, performance, and security testing for iOS and Android platforms. Collaborate with development, design, and product teams to ensure app quality and resolve issues.

Account Executive to drive new business growth in the Malta market. Responsibilities include prospecting, lead generation, pipeline management, and customer relationship management. Requires fluency in English and Italian, 1+ year of sales experience, and strong communication and organizational skills.

Leads the South West, East Europe, and Spain HR Services team, ensuring efficient and effective delivery through an ecosystem of providers. Drives HR transformation initiatives, implements standardized processes, and manages a team of HR experts.

Jobbex is seeking a Full Stack Developer with 5+ years of experience in Java development, including React.js. Responsibilities include designing, developing, and maintaining full stack applications, building RESTful APIs, and optimizing backend services.

JoomPulse, an AI analytics tool for Mercado Livre sellers, seeks an experienced Legal Counsel to provide legal support. Responsibilities include implementing privacy risk strategy, assessing risks, and serving as the primary point of contact for legal matters related to JoomPulse.

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.