Mellon Group
Mellon Group
5,001 – 10,000 Employees
ConsultingLogisticsManufacturing
Mellon Group is a multinational technology and services company working across payment processing, consulting, logistics, and manufacturing. Its solutions include EFTPOS payment systems, branch transformation, self-service technologies such as parcel lockers and robots, and customer management and contact center services. Mellon Group also supports organizations with risk management, compliance, IT infrastructure, and business process outsourcing, serving sectors including aviation and logistics. Its work focuses on helping businesses operate secure financial transactions, efficient processes, and stronger customer experiences across multiple markets.

Senior .NET Developer – Hybrid in Athens

Lead C# and .NET backend architecture and development at Mellon Technologies, supporting financial institutions and transaction-intensive organizations. Help mentor engineering teams while delivering scalable and dependable software.

Description

  • Own the design and delivery of backend systems built with C# and .NET.
  • Analyze existing systems, recommend architectural enhancements, and uphold sound engineering practices.
  • Work with product owners, business analysts, and clients to turn business needs into technical implementations.
  • Support junior developers through mentoring, code reviews, and consistent development standards.
  • Contribute to project planning, effort estimation, and technical direction.
  • Design and implement systems for strong performance, scalability, and reliability.

Requirements

  • At least five years of professional backend development experience with Microsoft technologies, including C# and .NET or .NET Core.
  • Solid knowledge of software architecture, design patterns, and clean-code practices.
  • Hands-on experience building RESTful APIs and working with Entity Framework and SQL databases.
  • Able to evaluate complex requirements and convert them into clear technical specifications.
  • Strong communication skills for working with clients and internal stakeholders.
  • Demonstrated experience leading or mentoring software development teams.
  • Full-stack experience with Razor, Blazor, or comparable Microsoft web technologies.
  • Experience with cloud platforms, particularly Azure.
  • Working knowledge of DevOps practices and CI/CD pipelines.
  • Familiarity with JavaScript or TypeScript frontend frameworks is advantageous.
  • A strong problem-solving approach and clear ownership of assigned work.
  • Comfortable working independently as well as collaboratively.
  • Proactive, detail-oriented, and committed to continuous improvement.

Benefits

  • Opportunity to develop within an international, technology-focused environment.
  • Supportive and diverse multicultural workplace.
  • Work with modern, advanced technology.
  • Ongoing professional training.

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