freelance English-speaking jobs in Valongo

Integrate BMS architecture and HVAC control logic within a cloud/software platform. Design smart building deployments and contribute to AI-powered HVAC control strategies.

Build and ship LLM-powered AI features and microservices in Python. Implement retrieval workflows, prompt orchestration, and agentic capabilities. Integrate multi-provider LLMs and work with platform, data, and ontology specialists.

Lead technical engagement with Tier-1 Service Providers throughout the pre-sales lifecycle. Design end-to-end service architectures, translate customer requirements into solution designs, and own technical responses to RFPs and RFIs. Advise customers on service design, platform integration, and migration strategies. Collaborate with bid teams, product management, and delivery teams.

Leads corporate-level project management and PMO activities, ensuring structured planning, execution, and delivery of high-impact initiatives. Drives execution excellence across projects, ensuring alignment with project management standards and best practices. Translates strategic priorities into actionable project roadmaps, ensuring initiatives are directly linked to business goals.

Build, operate, and shape the foundational infrastructure powering n8n Cloud. Responsibilities include designing, building, and operating infrastructure, driving observability and automation, contributing to on-call rotation, and collaborating with cross-functional teams. Must-haves include solid infrastructure/cloud/DevOps experience, application development with Node.js, CI/CD pipelines, observability and performance tuning, and proficiency with Kubernetes, Terraform, and one or more major cloud providers.

Category Manager will oversee and manage a specific product or service category, maximizing performance and profitability. Responsibilities include end-to-end product lifecycle management, vendor pricing strategy support, and collaboration with purchasing and sales teams.

Designs, builds, and implements SDN core network fabrics across multiple data center environments. Delivers greenfield Arista SDM fabrics ensuring high availability, resilience, and automation readiness. Supports strategic data center transformation programs.

Citrix Expert required with expertise in Citrix CVAD, NetScaler, and Citrix ADM. Must have strong scripting and automation skills with PowerShell and experience designing, implementing, and maintaining secure Citrix environments.

Principal Software Engineer to lead technical strategy for a high-revenue web platform and mobile app. Responsibilities include architecture design, server-side rendering, data layer management, and performance optimization. Must have experience with Node.js, React, MySQL, BigQuery, and GCP.

Own demand generation strategy and systems for a B2B AI company. Design, launch, and optimize campaigns across email, LinkedIn, and multi-touch sequences. Collaborate with sales to align on target audiences, messaging, and lead handoff. Build automated workflows using tools like Make, n8n, and HubSpot.

Project Controls Senior Engineer will manage commercial and scheduling aspects of data center construction projects. Responsibilities include preparing estimates, reviewing cost planning, monitoring schedules, and identifying risks. Requires estimating/quantity surveying qualification, 5-8 years' experience, Primavera P6 proficiency, and strong communication skills.

Leads end-to-end delivery of mobile apps, acting as Scrum Master and translating business requirements into user stories. Manages product backlog, ensures app quality and compliance, and collaborates with stakeholders. Requires 5+ years of experience in delivery, Scrum Master, or Business Analyst roles with proven mobile app delivery experience.

Data Analyst Alteryx needed for a hybrid project in Lisbon, Portugal. Requires 5+ years of experience as a Data Analyst, strong Alteryx Designer skills, and proficiency in Power BI and SQL. Responsibilities include designing, developing, and maintaining Alteryx workflows, optimizing existing workflows, and collaborating with stakeholders.

Application & Systems Integration Engineer will develop flexible thin film solar cells, conduct mechanical testing, and integrate solar cells into power systems.

Senior Full-Stack Data Engineer to design, develop, and deploy software and data pipelines for a global fashion company. Requires 5+ years of software development experience using Python, Spark, SQL, Scala, or Rust, and strong knowledge of cloud technology (Azure preferred).

AI Engineer needed to collaborate on AI opportunities, develop and evaluate proof-of-concepts, and build LLM-based applications. Requires experience in AI/ML engineering, strong understanding of machine learning, deep learning, and LLMs, and proficiency in Python.

Granter is seeking an AI Automation Specialist to build and implement AI-powered automations across departments. The ideal candidate is "AI-pilled," technically proficient, and possesses strong product and business acumen.

Senior Unity Developer needed to contribute to a successful free-to-play fishing simulator. Develop gameplay logic, support existing features, and optimize performance. Requires 5+ years programming experience, 3+ years in Unity, strong .NET Framework and C# skills, and understanding of design patterns.

Drive new business development and pipeline growth for Paynest's expansion in the Spanish market. Own sales activities, from lead generation to closing deals, and partner with leadership to execute strategic initiatives.

Senior Project Manager and/or Ivalua Technical Consultant with minimum 3 years Ivalua experience. Advanced SQL skills, ETL process expertise, API integration experience, and inter-system interface management experience required. Proficiency in French (C1 level) is necessary.