react English-speaking jobs in Espinho

Leads the development and implementation of Mastercard's pricing and interchange strategies for products and services, focusing on core fees. Designs, assesses, and implements initiatives to strengthen Mastercard's competitive position globally, regionally, and at the country level. Collaborates with commercial teams, product management, and functional partners to drive revenue growth and market competitiveness.

Founding Marketing Lead to build growth from beta to 10k users. Develop marketing strategy, community building, brand storytelling, and experimentation. Lead PR, user-generated content, and early marketing budget management.

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.

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 financial partnerships for card payments and services globally. Identifies, closes, and scales partnerships to drive customer acquisition, product adoption, and revenue. Manages card payment initiatives and collaborates with teams to execute projects. Requires 9+ years of experience in financial services with a focus on card payments and expertise in card scheme economics and the payments ecosystem.

Lead the affiliate channel strategy, team, deals, traffic quality, and results for a digital entertainment company. Experience with Tier-1 markets, deal-making, affiliate acquisition, traffic & profitability analysis, and team management required.

Data Analyst will produce statistical reports analyzing internet performance for Government customers. Responsibilities include leading analytical projects, collaborating with data scientists, developing data pipelines and dashboards, and identifying growth opportunities. Requires strong R skills, SQL, and experience with data wrangling and visualization.

Backend QA Engineer will design and execute tests for APIs, databases, and backend services. Collaborate with engineers to ensure high-quality standards. Requires 2-3 years of experience with Node.js, TypeScript, PostgreSQL, and API testing tools.

An Internal Account Director develops and implements recruitment and retention (R&R) strategies to meet customer goals within assigned therapeutic areas. They work with sales, project teams, and customers to understand needs, develop solutions, and identify growth opportunities.

Lead go-to-market strategy for a robotics startup, building the sales and marketing function from the ground up. Drive pipeline and revenue across sectors including hospitality, healthcare, defense, energy, and sports.

AI Research Engineer will own challenging problems in Granter, an AI grant consultant. Responsibilities include testing hypotheses, building prototypes, and collaborating with engineering and product to bring promising work to production. Requires 5+ years of software development, machine learning, or related experience, 1+ year with AI agents, and a Bachelor's and Master's degree in computer engineering or a related field. Strong Python skills, familiarity with frameworks like LangChain/LangGraph, and good engineering hygiene are essential. Must be fluent in English and Portuguese and have a strong sense of ownership and structured thinking.

Designs and governs global Payroll and Time & Attendance processes, ensuring consistency and compliance across regions. Owns and evolves end-to-end processes, defining standards, documentation, and control frameworks. Acts as primary process owner interface for the BPO partner, ensuring adherence to SLAs and compliance requirements.

Prepare and cook food according to recipes and quality standards. Wash, peel, and portion ingredients. Operate kitchen equipment and maintain a clean work station.

Senior Java Software Engineer to drive technical work, provide guidance, and deliver complex projects. Requires deep understanding of software engineering concepts, experience with the full software development lifecycle, and strong communication skills.

Senior SAP FI/CO Analyst to support a global manufacturing company's SAP S/4HANA Finance transformation. Experience with SAP FI/CO modules, implementations, and S/4HANA environments required.

Manage electronics obsolescence for legacy wind turbine control units and modules, ensuring long-term producibility and compliance. Coordinate obsolescence work packages, mitigate risks, and assess alternative components. Support redesign activities and act as a technical focal point for legacy electronics.

Workplace Engineer to design, manage, and optimize hybrid and cloud-based device management solutions in enterprise environments with a focus on Microsoft technologies.

Sales Engineer - BESS will build and maintain relationships with key ESS clients, develop sales strategies, and analyze market trends. Requires 2+ years of experience in BESS systems, utility-scale solar, or industrial solar panels, a relevant engineering degree, and proficiency in English.

Account Manager to drive sustainable business growth in targeted operating room accounts. Develop and execute account plans, secure sales opportunities, and act as a clinical consultant for customers. Requires 5+ years of commercial experience in the Medical Devices sector and experience as an OR instrument nurse (preferred).

Solution Architect for Dynamics 365 Finance & Operations implementations. Leads design, coordinates teams, and provides expert advisory support to customers on business system design and implementation best practices. Requires 7-10+ years of ERP consulting experience, strong Dynamics 365 F&O expertise, and proven project delivery track record.