Senior Backend Engineer - Fintech Payments Platform

Arvionservices; Christchurch; Hybrid; NZD 120,000 - 180,000; Full time

Benefits offered by this job

Birthday leave

Annual leave

Retirement plan

Healthcare

Stock purchase

Volunteer day

Office refreshments

Wellbeing resources

Global exposure

Job summary

Arvionservices is seeking a Senior Backend Engineer to join a global fintech organization focused on cross-border payments. You will own backend challenges end-to-end, from API design and data modeling to service architecture, production reliability, and platform modernization.

You will mentor mid-level engineers, drive platform improvements, and collaborate with Product, Compliance, Operations, Architecture, and Engineering to deliver secure, scalable solutions.

Qualifications

• 6 to 10+ years of experience building and operating production-grade backend services.
• Backend development with C#/.NET preferred; Java/Kotlin/Go also welcome.
• Strong SQL and relational database knowledge.
• Experience with AI-assisted development tools and modern cloud practices.
• Excellent written and verbal communication; technical leadership experience.

Responsibilities

• Design, develop, and own backend services supporting payments, multi-currency balances, onboarding, compliance, settlement.
• Lead delivery of platform capabilities from problem definition through production launch.
• Build and maintain partner integrations and settlement infrastructure.
• Own production health, observability, reliability, incident response, and on-call support.
• Collaborate with Product, Compliance, Operations, Architecture, and Engineering teams to deliver scalable solutions.
• Lead technical design reviews and establish engineering best practices.
• Mentor mid-level engineers and promote knowledge sharing.
• Drive modernization including migrations to cloud-native architectures.
• Champion AI-assisted development tools across the SDLC.

Skills

Backend development

AWS cloud services

CI/CD pipelines

Microservices

Event-driven architecture

AI-assisted development tools

Mentoring

Communication skills

Tools

GitHub Copilot

Cursor

Claude Code

Postman

Redis

Memcached

Job description

Arvionservices is seeking a Senior Backend Engineer to join a global fintech organization focused on cross-border payments. You will own backend challenges end-to-end, from API design and data modeling to service architecture, production reliability, and platform modernization.

You will mentor mid-level engineers, drive platform improvements, and collaborate with Product, Compliance, Operations, Architecture, and Engineering to deliver secure, scalable solutions.