Senior Go Backend Engineer for Real-Time Open Banking

X-Team; Melbourne; Hybrid; AUD 150,000 - 190,000; Full time

Job summary

X-Team in Melbourne is seeking an experienced Senior Backend Engineer to lead design, development, and modernization of scalable backend services using Go or Java, focusing on high-concurrency and production-ready systems.

You will build durable workflows with Temporal or similar frameworks, design PostgreSQL schemas, and expose robust gRPC/Protobuf APIs while migrating batch architectures toward real-time event processing in AWS/Kubernetes environments.

Qualifications

• 5+ years of senior backend engineering experience
• Proficiency in Go or Java for high-concurrency distributed systems
• Production experience with Temporal or equivalent durable workflow orchestration frameworks
• Strong experience with PostgreSQL, including schema design and query optimization
• Experience with gRPC and Protocol Buffers
• Experience modernizing batch architectures toward real-time data processing using AWS, Kubernetes/EKS

Responsibilities

• Lead the design, development, and modernization of highly scalable backend services using Go or Java
• Build and maintain durable workflows using Temporal or equivalent frameworks
• Design and optimize PostgreSQL schemas and queries; build robust gRPC/Protobuf APIs
• Help transition batch architectures toward real-time processing using AWS, Kubernetes/EKS
• Ensure security, reliability, and production readiness of enterprise services
• Collaborate with engineering teams and stakeholders to deliver high-quality solutions

Skills

Go

Java

PostgreSQL

gRPC

Protocol Buffers

AWS

Kubernetes

Temporal

Tools

Temporal

Job description

What does it take to modernize critical backend infrastructure for a leading Australian banking and financial services organization? Join an enterprise engineering squad working on a large-scale Open Banking and mobile platform ecosystem, helping transition traditional batch processing toward real-time data processing and building resilient services that support millions of customers.

You’ll work across Go, Temporal, PostgreSQL, gRPC, Protocol Buffers, AWS, and Kubernetes, helping modernize core backend services while collaborating closely with engineering teams and enterprise stakeholders.

The first 2–4 weeks may require onsite work in Melbourne, Australia for context, knowledge sharing, and stakeholder alignment. Candidates must be open to this initial onsite commitment and have, or be able to explore, the appropriate Australian working visa options. Melbourne-based candidates open to a longer-term hybrid engagement are especially desirable.

The Role

• Backend Engineering & Architecture: Lead the design, development, and modernization of highly scalable backend services using Go or Java, with a focus on high-concurrency, distributed, and production-critical systems.
• Workflow Orchestration: Build and maintain durable workflows using Temporal or equivalent workflow orchestration frameworks, supporting long-running processes, retries, state management, and fault-tolerant execution.
• APIs & Data Platforms: Design and optimize PostgreSQL schemas and queries while building robust gRPC and Protocol Buffers APIs for distributed backend services.
• Real-Time & Cloud Modernization: Help transition traditional batch architectures toward real-time polling, event-driven processing, or streaming, leveraging AWS, Kubernetes, and EKS to deliver resilient cloud-native services.
• Security, Reliability & Operations: Build secure enterprise services with strong practices around vulnerability management, automated security scanning, patching, testing, observability, and production reliability.
• Technical Leadership & Collaboration: Drive architectural decisions, mentor engineers, troubleshoot complex production challenges, and collaborate directly with engineering teams and client stakeholders to deliver high-quality solutions.

The "Must-Haves"

• 5+ years of senior backend engineering experience with strong proficiency in Go or Java, particularly in high-concurrency and distributed systems.
• Production experience with Temporal or equivalent durable workflow orchestration frameworks for long-running, stateful, and fault-tolerant processes.
• Strong experience with PostgreSQL, including schema design and query optimization, plus deep experience with gRPC and Protocol Buffers.
• Experience modernizing batch architectures toward real-time data polling, event-driven processing, or streaming, with production experience in AWS, Kubernetes, or EKS.
• Experience building secure, resilient enterprise backend services and willingness to work onsite in Melbourne for the first 2–4 weeks, with appropriate Australian work authorization or a viable visa pathway.

The "Bonus" Skills

• Experience in financial services, Open Banking, OAuth2 consent management, financial APIs, or secure transaction processing.
• Experience with Terraform, Helm, Snyk, automated vulnerability scanning, security patching, or enterprise DevOps practices.
• Hands-on experience with HashiCorp Vault for secrets management or LaunchDarkly for feature flags and progressive rollouts.
• Familiarity with mobile synchronization, client-side caching, offline-first architectures, SQLite, or highly resilient distributed systems.
• Exposure to AWS and GCP, along with strong shift-left testing, automation, and security practices.
• Technical Leader at Heart: Confident making architectural decisions, guiding engineers, and raising the technical bar across the team.
• Hands-On Problem Solver: Enjoys diving into complex backend, distributed systems, and production challenges to find practical and scalable solutions.
• Reliability-Focused: Prioritizes resilience, scalability, security, observability, and operational excellence when building production systems.
• Security-Conscious: Takes ownership of secure engineering practices, proactive risk reduction, automated testing, and continuous improvement.
• Strong Communicator: Comfortable working directly with engineers, technical leaders, and enterprise stakeholders, translating complex technical decisions clearly.
• Collaborative & Pragmatic: Takes ownership, adapts to changing priorities, and works effectively in a fast-paced enterprise environment while enabling the wider team to succeed.