Backend Engineer

Arvion Services; Christchurch; On-site; 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

Job Overview:

We are seeking an experienced Senior Backend Engineer to join a global fintech organization specializing in cross-border payments technology. This role is ideal for a hands‑on engineer who enjoys owning complex backend challenges end-to-end, from API design and data modeling to service architecture, production reliability, and platform modernization. The successful candidate will play a key role in building scalable payment infrastructure while providing technical leadership and mentorship across engineering teams.

What Will You Do:

• Design, develop, and own backend services that support payments, multi-currency balances, onboarding, compliance, settlement, and related financial services.
• Lead the delivery of new platform capabilities from problem definition through production launch.
• Build and maintain 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 closely 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.

What Makes You a Good Fit:

• 6 to 10+ years of experience building and operating production‑grade backend services end-to-end.
• Strong backend development experience, preferably with C#/.NET; candidates with Java, Kotlin, Go, or other object‑oriented programming experience are also encouraged to apply.
• Solid understanding of SQL and relational database technologies.
• Experience developing, maintaining, and executing automated tests as part of the software delivery lifecycle.
• Hands‑on experience using AI‑assisted development tools such as GitHub Copilot, Cursor, Claude Code, or equivalent platforms.
• Strong experience with AWS cloud services, CI/CD pipelines, and modern deployment practices, including services such as SQS, DynamoDB, S3, ECS, and Lambda.
• Deep understanding of software architecture, system design, microservices, service‑oriented architectures, and event‑driven systems.
• Experience working within payments, foreign exchange, fintech, or regulated industries.
• Demonstrated technical leadership experience, including mentoring engineers, conducting design reviews, and making architecture decisions.
• Strong written and verbal communication skills.

Nice to Have:

• Experience with financial systems, including ledgers, double‑entry accounting, or financial transaction platforms.
• Experience participating in hiring, interviewing, or onboarding technical talent.
• Experience leading platform modernization or migration initiatives.
• Experience with caching technologies such as Redis or Memcached.
• Familiarity with project management and documentation tools such as Jira and Confluence.
• Experience with API testing tools such as Postman or Bruno.
• Experience leveraging AI tools for automated testing and software quality engineering.

What We Offer:

• Competitive remuneration package with annual salary reviews.
• Paid birthday leave.
• Additional annual leave entitlement based on years of service (up to 5 extra days).
• Employer retirement contribution benefits.
• Comprehensive healthcare coverage.
• Employee stock purchase program.
• Paid volunteering day to support a charity of your choice.
• Complimentary office refreshments, including fruit, snacks, beverages, and coffee.
• Access to mental health and wellbeing support resources.
• Opportunity to work with a global fintech organization on innovative payment technologies.

Working Arrangement:

• Hybrid working arrangement.
• Out stationed candidates must be willing to travel to the Christchurch office as required for company meetings, collaboration sessions, and events.
• Opportunity to collaborate with global engineering teams across multiple regions.