Senior Backend Engineer (.NET Core) | Remote | LATAM

Remote from: Mexico, Peru, Argentina, Guatemala, Honduras, or Colombia 

Native Spanish & B2+ English Required

We are looking for an experienced Senior Backend Engineer to join a high-performing international engineering team. This is a hands-on technical role for a senior individual contributor who is passionate about building scalable backend systems, designing robust APIs, and delivering high-quality software in a modern cloud environment.

This is not a management or architecture role—your primary focus will be designing, developing, and improving mission-critical backend services while collaborating with senior engineers across multiple countries.

• Position: Senior Backend Engineer
• Employment Type: Full-Time Contractor
• Location: Remote (Applicants must be based in Mexico, Peru, Argentina, Guatemala, Honduras, or Colombia)
• Project Duration: Initial 12-month contract with strong potential for long-term extension
• Working Schedule: Monday–Friday, aligned with Spain (Barcelona) business hours, starting at 12:00 PM Spain time
• Team: International engineering team across Spain, Greece, Ukraine, and other European countries

• →Design, develop, and maintain scalable backend services using .NET Core and C#.
• →Build and enhance secure, high-performance REST APIs for internal and external platforms.
• →Own backend components from design through production deployment.
• →Develop integrations with financial institutions, investment brokers, payment providers, and third-party services.
• →Write clean, maintainable, fault-tolerant, and scalable code.
• →Improve platform performance, reliability, and maintainability.
• →Participate in technical discussions, architecture reviews, and code reviews with senior engineers.
• →Support CI/CD initiatives and cloud infrastructure improvements when required.
• →Collaborate within a distributed international engineering team.

• 8+ years of professional Backend Software Engineering experience.
• Strong hands-on experience with .NET Core and C#.
• Extensive experience designing and developing REST APIs.
• Strong experience with relational and NoSQL databases, including:
  • SQL
  • MongoDB
  • Firestore
  • Other NoSQL databases
• Experience working with cloud platforms:
  • AWS
  • Azure
  • GCP
• Strong understanding of scalable backend architecture and distributed systems.
• Ability to work independently with minimal supervision.
• English proficiency (B2+) for technical meetings and collaboration.
• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or a related field (or equivalent experience).

• .NET Core
• C#
• REST APIs
• Microservices

We are specifically looking for candidates with experience building technology for the investment sector, including one or more of the following:

• Investment FinTech platforms
• Robo Advisors
• Neobrokers
• Wealth Management platforms
• Investment trading systems
• Financial market integrations
• Investment brokerage platforms

• SQL
• MongoDB
• Firestore
• NoSQL Databases

• AWS
• Azure
• Google Cloud Platform (GCP)
• CI/CD
• Kubernetes
• RabbitMQ