About infraone infraone’s purpose is to protect the critical infrastructure modern life depends on—from factories that produce essential goods to utilities and water supply—by providing world-class cybersecurity and network services to manufacturing environments.

We deliver network and cybersecurity projects and maintain 24×7 support for leading manufacturers across Europe. Guided by the values of Ownership, Customers First, Trust, Ambition, and Excellence, we are building Europe’s leading OT-cybersecurity services firm.

The Sales

Assistant & Back Office is responsible for supporting the company's commercial activities by ensuring the accurate administrative management of sales processes, purchasing, invoicing, and contract renewals, as well as maintaining commercial information in the CRM. The role contributes to the efficiency of business operations and facilitates coordination between the Sales, Finance, and Projects departments Responsibilities:

Sales Support

Collaborate with the Sales team by providing coordination and administrative support throughout the sales process.

Maintain and update the CRM, ensuring data accuracy, quality, and traceability.

Support the Technical Business Units in preparing and submitting proposals and commercial quotations through the CRM system.

Ensure accurate documentation and proper record maintenance. Administration & Finance

Assist the Finance department with invoice preparation, management, and issue resolution.

Handle the validation of expenses, allowances, and monthly variable compensation. Purchasing & Renewals Management

Process purchase orders and provide administrative follow-up with suppliers.





Coordinate hardware and software contract renewals.

Maintain an up-to-date inventory of contracts and software licenses. Compliance & Administrative Support

Support the management of Occupational Health and Safety (OHS) platforms.

Assist with compliance documentation and the coordination of business activities.

Monitor and manage the documentation required for customers and suppliers. Requirements

Bachelor's degree or vocational qualification in Business Administration, Finance, Sales Management, or a related field.

Previous experience in sales administration, commercial support, or back-office roles.

Proficiency in Microsoft Office, particularly Excel.

Experience with CRM platforms such as Microsoft Dynamics 365, Salesforce, HubSpot, or similar.

Intermediate English level (B2) and fluency in Spanish are required. Skills

Strong organizational and planning skills.

Customer-oriented mindset, both internally and externally.

Excellent attention to detail.

Strong analytical skills and follow-up capabilities.

Proactive attitude and initiative.

Effective communication skills.

Team player with the ability to coordinate across different departments.

Strong prioritization and time management skills, with the ability to meet deadlines.

What We

Offer

Permanent contract.

Hybrid working model (2 days per week at our office in Passeig de Gràcia).

Adaptable benefits package, including meal vouchers, childcare vouchers, transportation allowance, and Wellhub (formerly Gympass).

Opportunity to join a dynamic team in a collaborative work environment.

Professional growth and development opportunities.

📌 Sales Assistant & Back-office (Barcelona)
🏢 infraone
📍 Barcelona