freelance English-speaking jobs in Valongo

Senior Backend Software Engineer will design, build, and run internal data platforms. Responsibilities include contributing to complex technical projects, mentoring junior engineers, and driving innovation.

Develop and deploy machine learning models to solve business problems. Perform Exploratory Data Analysis (EDA) and feature engineering. Build data pipelines and analytical workflows.

Software Engineer intern to develop mobile and web applications using Java, Angular, and other relevant technologies. Collaborate with teams to design, implement, and maintain solutions. Must have 2 years of experience with Angular as a full stack developer and experience with iOS and Android mobile app development.

DesignRush seeks a Senior Marketing Journalist to create original stories in AdTech, MarTech, and branding. Responsibilities include publishing daily news, features, and explainers, identifying story leads, and partnering with executives for co-branded content.

Data Analyst to analyze marketing and product data, build visualizations, and support decision-making with insights. Requires 2+ years of experience in data analytics, strong SQL and Python skills, and proficiency with BI tools.

Java Developer will collaborate on software used by international travel brands. Responsibilities include optimizing asynchronous requests, improving development pipelines, and refactoring code. Familiarity with generative AI tools is desirable.

Sales Engineer to drive sales growth within the vehicle and automation industry. Identifies new business opportunities, builds customer relationships, and provides technical support. Requires a Master's degree in Engineering and experience in technical sales.

Senior UX/UI Designer to lead end-to-end design initiatives, from discovery to delivery. Design flows, wireframes, prototypes, and high-fidelity mockups using Figma. Collaborate with product and engineering teams. 5+ years of experience in UX/UI design, ideally in B2B or SaaS products. Fluency in English required.

Lead a team of analytics engineers rebuilding a data warehouse. Design, modernize, and manage data products supporting business analytics. Collaborate with stakeholders and embedded analytics teams. Drive AI enablement and automation.

We are seeking a .NET Developer to design, develop, test, and deploy applications using C#, ASP.NET Core, and .NET 6/8+. Responsibilities include building RESTful APIs, managing SQL Server databases, and modernizing legacy applications. The ideal candidate has 3+ years of experience in .NET development and strong proficiency in C#, ASP.NET Core, and Entity Framework Core.

UI/UX Designer will craft intuitive digital experiences for web and mobile platforms. Collaborate with product and engineering teams to translate business needs into impactful designs. Must have 4+ years of experience in UI/UX design and proficiency with Figma.

Detects and investigates financial crime risks, liaising with law enforcement and responding to court orders. Conducts fraud investigations, prepares documentation for third-party requests, and generates reports on suspicious activity. Requires fluency in English and Polish, 2+ years of FinCrime experience, and familiarity with investigative methodologies.

Senior SAP S/4 Hana ABAP Developer with 3-5 years of experience in ABAP Programming (Enhancement, Workflows, Interfaces, Forms, and Reports). Must know Clean Core Strategy and modern SAP ABAP Development tools (RAP, SOA, CDS Views, oData API's, Clean Code, AIF, etc.). Experience with Side-by-Side, Key User, and Classic Extensibilities, ABAP on Cloud, and SAP Business Technology Platform is required.

Leads and optimizes delivery and returns operations for Portugal, Spain, and Italy. Manages logistics partner performance, resolves operational issues, and defines KPIs. Collaborates with cross-functional teams to improve logistics processes.

Application Security Analyst will identify vulnerabilities, assess risks, and collaborate with teams to mitigate them. Responsibilities include executing scans, monitoring threat intelligence, and generating reports on vulnerability status. Requires experience with vulnerability management tools, application security testing, and ticketing systems. Fluency in English is required.

Business Development Representative will execute multichannel outreach to European enterprise decisionmakers, source BANT-aligned opportunities, and manage inbound leads.

Principal Software Engineer to join the Rancher software engineering team, focusing on building innovative open source software in the container space. This role is key to enriching the user experience of cloud‐native platforms like Kubernetes and simplifying containerized workload management.

Senior Software Engineer to design, build, and maintain high-availability, high-complexity systems using .NET Core and Azure. Experience with microservices, serverless functions, and regulated environments required.

The Chief of Staff will work directly with the CEO, managing financial planning, OKRs, investor communications, legal coordination, process design, and special projects. This role requires strong analytical and financial skills, experience with strategy consulting, and the ability to build systems and dashboards.

Manager for EY's Government and Public Sector team, contributing to the growth strategy and implementation of transformation programs for public institutions. Responsibilities include understanding client needs, developing business plans, managing client relationships, and leading commercial proposals. Requires consulting experience, public sector knowledge, and strong communication skills.