Senior fullstack Developer

Who are we ?

Quanteam, founding entity of RAINBOW PARTNERS, is a consulting firm specialized in Banking and Financial Services. With more than 1200 consultants across 10 countries, we combine business and IT expertise to support leading institutions in transformation projects.

Our core areas:

➡ Quantitative Finance

➡ Risk & Compliance

➡ Operations & Finance

➡ Transformation & Organization

➡ Information Systems.

🔎 We are looking for a Senior Fullstack Developer (.NET & Angular)

Join a retail technology project focused on the core software behind point-of-sale (POS) systems. This role is approximately 80% backend, combining development in established .NET technologies with architectural decisions and technical guidance.

📝 MAIN TASKS

• Develop, maintain, and enhance core POS applications using C#, .NET Framework, and Windows Forms.
• Contribute to architectural decisions and the evolution of existing applications.
• Provide technical guidance, support colleagues, and contribute to code reviews and development best practices.
• Design and optimize SQL Server queries and database structures to improve performance and reliability.
• Develop and maintain backend services and microservices.
• Contribute to frontend development using Angular when required.
• Investigate and resolve technical issues affecting business-critical retail applications.
• Collaborate with technical and business teams within an Agile environment, using Azure DevOps to manage development activities.

🧩 YOUR PROFILE AND SKILLS

• More than 5 years of professional experience in .NET development.
• Strong knowledge of C#, .NET Framework, and Windows Forms.
• Proven experience maintaining and evolving legacy applications built with older .NET technologies.
• Advanced SQL Server skills, including query optimization and database performance tuning.
• Experience contributing to software architecture or technical design decisions.
• Previous experience leading or mentoring developers, including informal technical leadership.
• Experience developing and integrating microservices.
• Familiarity with Angular and willingness to contribute to frontend tasks.
• Experience using Azure DevOps for development and project management.
• Familiarity with Agile methodologies.
• Strong communication, collaboration, and problem-solving skills.
• A degree in Computer Science, Software Engineering, or a related field.
• Experience with retail or POS systems would be an advantage.
• Fluency in Portuguese and a minimum B2 level of English.
• Availability for a hybrid position in Lisbon, with two days per week at the office in the Colombo area.

🎁 WHAT WE OFFER

• A salary package depending on experience and competencies.
• Permanent contract (CTI).
• Meal allowance.
• Health Insurance.
• Extra holiday: Christmas Eve or New Year’s Eve.
• Access to Quanteam Academy for continuous learning and certifications.
• Elevate Program to support professional development and career growth.
• Career progression plan.
• Ongoing follow-up and technical support provided by a Consultant Expert.