freelance English-speaking jobs in Maia

Data Engineer specializing in Azure Databricks and Delta Lake will develop and maintain data pipelines, optimize Delta Lake tables, and integrate workloads using Azure Data Factory.

Senior Java developer to design, develop, and maintain scalable backend services using Java and modern frameworks. Lead technical decisions, ensuring architecture quality and code standards. Collaborate with cross-functional teams to deliver high-quality features within agile cycles.

Senior Android Developer with 5+ years of experience needed. Must have experience with Kotlin, Android SDK, Eclipse or Android Studio, and C++. Experience with Android development patterns, UI applications, and performance analysis is required.

Data Test Engineer to design, implement, and evolve automated testing frameworks using Python, Robot Framework, and Selenium. Validate frontend behavior, backend services, and SQL-based analytical results.

Mid-to-Senior KDB+ Developer to design, code, and deploy KDB+ systems for global Cash Equities analytics. Experience with ticker plants, HDB management, and Python (Plotly/Streamlit) is required. 3-7+ years of KDB+ development experience and a Master's degree are essential.

Experienced Platform Engineer needed to design, implement, and maintain scalable cloud infrastructure using AWS, OVH, or similar providers. Expertise in Terraform, Ansible, Packer, Kubernetes, and virtualization required.

Senior Cloud Infrastructure Engineer to define and drive cloud architecture standards across core infrastructure domains. Experience with Kubernetes, AWS infrastructure, and cloud networking required.

Software Engineer to design and build AI-powered product features for an early-stage coaching platform. Collaborate with product and AI leads to shape system behavior and product evolution. Contribute to conversation ingestion, analysis, and long-term memory systems.

Fraudio seeks recent graduates with a License degree in a technical or scientific field for a 12-month Junior Engineer role. This position offers a structured path to transition from academic theory to production environments in fintech and fraud prevention.

QA Automation Tester will design, develop, and maintain automated test suites for web applications and distributed systems. Responsibilities include API-level testing, data pipeline validation, and collaborating with software engineers to embed quality into the development lifecycle.

Leads Operations Platform, ensuring high performance, team development, and continuous improvement. Manages SLAs, KPIs, and operational excellence. Drives onboarding, capability building, and performance management. Supports transformation projects and collaborates with cross-functional teams.

Build the growth and marketing engine from the ground up for a connected swim training platform. Own end-to-end growth across content, paid, influencers, lifecycle, and events. Manage agency, own the funnel, and drive performance marketing.

Cloud Engineer to design, automate, and maintain cloud infrastructure using Infrastructure as Code tools. Experience with Azure, Terraform, Packer, Ansible, and CI/CD pipelines required.

Part-time Research Nurse or CRA needed for patient recruitment in Portugal. Support patient qualification and referral to research sites through phone interviews and data assessment. Collaborate with research sites and sponsors. Freelance, home-based position with flexible hours.

Senior Python Developer needed to design, develop, and maintain scalable backend services. Experience with AWS, Kubernetes, Terraform, and streaming technologies required. Strong communication and collaboration skills essential.

Senior Software Engineer to design, develop, and deploy new features in .NET Core/.NET Framework. Optimize performance of distributed cache and SQL databases. Expertise in .NET Core, .NET Framework, and C# is required.

Company Offsites & Group Travel Sales Executive will sell company offsites and bespoke group trips, manage sales administration, and host trips. Must have proven sales experience, be target-driven, and passionate about adventure. Fluent English and Portuguese required.

Lead a development team in delivering high-quality Salesforce solutions for a leading Portuguese retail group. Translate business requirements into technical solutions, guide development using Agile methodologies, and ensure alignment with best practices.

As an Identity and Access Management (IAM) Expert, you will design, configure, and deploy IAM solutions, manage identity governance, and operate the IAM environment. You will also investigate access issues, recommend remediation actions, and contribute to the definition and optimization of JML processes.

Experienced Azure Data Analyst needed to build data products and translate complex data into business insights. Must have strong business acumen, SQL, and Power BI skills, along with experience with Azure technologies (Databricks, Data Factory, Synapse).