Senior Backend Engineer - FinTech Payments (C#/Java)

Smart Solutions & Services Sa; Santiago; On-site; CLP 116,959,000 - 155,945,000; Full time

Job summary

Insight Global is partnering with a leading global financial technology organization to deliver a Senior Backend Software Engineer role focused on building scalable payment platform services. The role involves end-to-end development, collaboration with product and compliance teams, and mentoring mid-level engineers in a fast-paced environment.

The position emphasizes modernization initiatives, cloud-based architectures, and AI-assisted coding tools to improve productivity and code quality as

Qualifications

• 6+ years of backend software engineering experience.
• Strong experience with C#/.NET or another OOP language (Java, Go, etc.) and willingness to work in a .NET environment.
• Experience building and supporting production-scale backend systems.
• Payments, fintech, FX, or money movement experience.
• Microservices, event-driven architecture, and system design experience.
• Cloud experience required; AWS preferred.
• Daily use of AI development tools such as Copilot, Cursor, Claude Code, or similar.
• Product-focused mindset with strong communication skills.
• Ability to thrive in a fast-paced, ambiguous environment.
• Experience with AWS services such as SQS, Lambda, ECS, DynamoDB, and S3.
• Experience with distributed systems and high-volume transaction processing.
• Experience leading technical design discussions and mentoring engineers.
• Experience with CI/CD pipelines and modern deployment practices.

Responsibilities

• Design, develop, and maintain scalable backend services supporting financial transactions and payment platform functionality.
• Build and enhance systems related to onboarding, payments, settlement, foreign exchange, and business-critical financial operations.
• Collaborate with product, compliance, and operational teams to deliver new capabilities from concept through deployment.
• Develop and maintain integrations with external partners and third-party platforms.
• Drive service reliability, monitoring, observability, incident response, and production readiness within assigned domains.
• Participate in architecture discussions, technical planning, and design reviews.
• Provide mentorship and technical guidance to mid-level engineers.
• Contribute to modernization initiatives involving cloud infrastructure, service-oriented architecture, and platform transformation efforts.
• Leverage AI-assisted development tools throughout the software development lifecycle to improve productivity and code quality.

Skills

Backend engineering

C#/.NET

Microservices

Cloud (AWS)

CI/CD

AI-assisted coding tools

Tools

AWS

AWS ecosystem (SQS, Lambda, ECS, DynamoDB, S3)

Job description

Insight Global is partnering with a leading global financial technology organization to deliver a Senior Backend Software Engineer role focused on building scalable payment platform services. The role involves end-to-end development, collaboration with product and compliance teams, and mentoring mid-level engineers in a fast-paced environment.

The position emphasizes modernization initiatives, cloud-based architectures, and AI-assisted coding tools to improve productivity and code quality as