Senior Backend Engineer - Payments & Fintech Platform

Ausenco; Santiago; On-site; CLP 50,000,000 - 75,000,000; Full time

Job summary

Insight Global is partnering with a leading global fintech organization to design, build, and operate a scalable payments platform. The Senior Backend Software Engineer will contribute across the full software lifecycle, from architecture through production deployment, collaborating with product, compliance, and operations to deliver secure, reliable financial services.

You will mentor mid-level engineers, drive modernization, and leverage AI-assisted development tools to improve productivity.

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 development

C#/Java/Go

Distributed systems

Microservices

Cloud experience (AWS)

Product-focused mindset

Mentoring engineers

CI/CD pipelines

AI development tools usage

Tools

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

Copilot / Cursor / Claude Code

Job description

Insight Global is partnering with a leading global fintech organization to design, build, and operate a scalable payments platform. The Senior Backend Software Engineer will contribute across the full software lifecycle, from architecture through production deployment, collaborating with product, compliance, and operations to deliver secure, reliable financial services.

You will mentor mid-level engineers, drive modernization, and leverage AI-assisted development tools to improve productivity.