freelance English-speaking jobs in Castelo Branco

Paid Growth Lead to own paid strategies for B2B SaaS companies across AI, cybersecurity, ML, and other technical categories. Manage LinkedIn Ads, Google Ads, YouTube Ads, and Reddit Ads. Improve campaign messaging, optimize landing pages, and connect paid performance to pipeline.

Provide 1st and 2nd level IT support via ticketing system and phone in English. Advise, handle, and resolve software and hardware issues. Document technical issues and manage user accounts and licenses. Install and configure workstations and software.

Manage existing customer accounts, focusing on cross-selling and upselling through digital channels. Prepare commercial proposals and maintain CRM (Salesforce) and other tools.

Designs, develops, and deploys Boomi integration processes (Atoms) to connect applications and databases. Implements data mappings, builds APIs, and troubleshoots integration issues.

Senior Cyber Security Analyst provides strategic security advisory to Flutter divisions, ensuring industry best practices, regulatory compliance, and risk mitigation. The role involves translating complex cyber security risks into business-relevant language, guiding teams on secure design, and collaborating with stakeholders to improve security controls. Requires deep understanding of security technologies, frameworks (ISO 27001, NIST, ISF, UKGC, GDPR), and experience in a security advisory capacity.

Senior AI Engineer to design, develop, and scale production-grade AI systems. Lead complex AI projects, build secure generative AI solutions, and mentor junior engineers. Strong backend engineering, AI, and cloud experience required.

Senior Full Stack Developer needed to build and maintain features across backend and frontend. Experience with Django, Next.js/TypeScript, Stripe Connect marketplaces, and Linux servers required. Must be comfortable with deployments, server updates, and production support.

Own two strategic directions impacting revenue and business growth. Design and launch onboarding communication flows, build trigger-based sequences, and reduce churn. Build a scalable referral channel and design end-to-end referral flows.

Senior Database Administrator with 5+ years of experience in AWS environments. Expertise in AWS RDS, Aurora (PostgreSQL/MySQL), and Redshift.

Supply Chain Coordinator needed for a medical device manufacturing company. Develop and oversee production planning, material supply schedules, and MRP activities. Manage purchasing activities, negotiate with suppliers, and coordinate import/export logistics.

Energy Systems Engineer (R&D) will participate in international projects focused on Energy Markets and Storage. Responsibilities include project implementation, writing specifications, overseeing demonstrators, and developing solutions for EDP's Energy Management Platform.

Designs and validates analog and mixed-signal circuits, with a focus on high-speed SerDes interfaces. Conducts schematic entry, simulation, and validation of analog blocks. Collaborates with layout engineers to optimize designs and minimize parasitics. Develops and validates custom digital circuits for high-speed applications. Utilizes IC design tools and SPICE simulators for circuit analysis.

Support and review AI/GenAI use cases, define security requirements for AI platforms, and perform security reviews of AI solutions. Identify and mitigate AI security risks such as prompt injection and data leakage. Contribute to AI security governance and secure-by-design patterns.

Data Engineer to design, build, and maintain scalable data pipelines using Snowflake, dbt, and AWS services. Requires strong SQL, Python, and dimensional modeling skills.

Sales Development Representative will qualify leads, conduct discovery calls, and gather prospect information. The role requires strong communication, organizational, and problem-solving skills. Fluency in English and German is preferred.

Leads cross-functional improvement projects for the CBS, including new system implementations and process improvements. Manages the full project lifecycle, from analysis of business requirements to implementation and stabilization. Communicates with stakeholders and manages project scope, schedule, and cost.

Business Development Representative to build and iterate outbound sales strategy, acquire new customers in the Portuguese market. Source and prospect leads, execute outbound calls, emails, and LinkedIn cadences. Build trust with prospects, identify challenges and pain points, and nurture prospects through the sales funnel. Demonstrable experience in outbound business development within a Tech/SaaS environment is required.

Senior Solutions Engineer partners with go-to-market and internal teams to drive customer success. This role involves working with Account Executives to support prospective clients evaluating Deel's platform and product offerings. Responsibilities include consulting with customers, translating requirements into solution designs, and advocating for prospect needs. Minimum of 4 years of experience as a Solutions Engineer or equivalent customer-facing technical role is required.

Lead a team of 5-7 Data Scientists and Machine Learning Engineers building AI solutions for fraud detection, risk assessment, and platform protection. Translate risk management requirements into machine learning problems and oversee the end-to-end modeling process. Ensure models are deployed to production with robust MLOps practices.

Support the HR team in recruitment processes, from job posting to onboarding. Screen resumes, conduct phone screenings, schedule interviews, and maintain recruitment information.