Senior Backend Engineer — Payments Platform (Hybrid)

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

Benefits offered by this job

Annual salary reviews

Birthday leave

Additional leave based on service (up

Employer retirement contribution

Healthcare coverage

Employee stock purchase program

Volunteer day

Refreshments in office

Mental health support

Global fintech collaboration

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 to platform modernization.

You will mentor engineers, design scalable payment infrastructure, and collaborate with product, compliance, and operations while advancing cloud-native architectures and AI-assisted development practices.

Qualifications

• 6 to 10+ years of production backend experience.
• Proficient in C#/.NET; knowledge of Java/Kotlin/Go is a plus.
• Strong SQL and relational DB skills.
• Experience with automated tests as part of SDLC.
• Hands-on with AI-assisted development tools.
• Experience with AWS, CI/CD and modern deployment.
• Expertise in payments/fintech or regulated domains.
• Strong written and verbal communication skills.

Responsibilities

• Design, develop, and own backend services for payments and related financial services.
• Lead the delivery of new platform capabilities from problem definition through production launch.
• Build partner integrations and settlement infrastructure critical to business operations.
• Own production health within your domain, including observability, reliability, incident response, and on-call support.
• Collaborate with Product, Compliance, Operations, Architecture, and Engineering teams to deliver scalable and secure solutions.
• Lead technical design reviews, define architecture decisions, and establish engineering best practices.
• Mentor and support the growth of mid-level engineers through technical leadership and knowledge sharing.
• Drive modernization initiatives, including migration from legacy systems to modern cloud-native architectures.
• Champion the adoption of AI-assisted software development tools and practices throughout the software development lifecycle.

Skills

Backend development

C#/.NET

Architectural design

Mentoring

Communication

AI-assisted development

Payments/fintech domain

SQL relational databases

Tools

AWS

CI/CD

SQS

DynamoDB

S3

ECS

Lambda

GitHub Copilot

Cursor

Claude Code

Postman

Bruno

Redis

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 to platform modernization.

You will mentor engineers, design scalable payment infrastructure, and collaborate with product, compliance, and operations while advancing cloud-native architectures and AI-assisted development practices.