Senior Software Engineer - Full Stack (.NET, React, AWS)

Luxoft Australia; Council of the City of Sydney; On-site; AUD 140,000 - 180,000; Full time

Job summary

Luxoft Financial Services UK Limited Australia Branch is seeking a highly experienced Senior Software Engineer to join a delivery team focused on digital transformation, workflow automation, and cloud-native development. You will work on enterprise-grade applications, integrating government schemes and mortgage processing, using .NET, AWS, and React.

You will contribute to solution design, LLD, and implementation, while mentoring engineers and supporting CI/CD, security, and production

Qualifications

• 8+ years of software engineering experience in enterprise environments.

Responsibilities

• Design, develop, and maintain full-stack applications using .NET and React.

Skills

Stakeholder engagement

Communication

Leadership

Problem solving

Tools

C#

React.js

RESTful APIs

AWS

AWS Lambda

API Gateway

Amazon S3

Amazon RDS

Amazon DynamoDB

ECS / EKS

Kafka

EventBridge

SQS

SNS

Job description

Role on behalf of Luxoft Financial Services UK Limited Australia Branch

We are seeking a highly experienced Senior Software Engineer to join a high-performing delivery team focused on digital transformation, workflow automation, enterprise integrations, and cloud-native application development. This is a hands-on engineering role requiring strong expertise in backend development using .NET and AWS, while also contributing to frontend development using React.

The successful candidate will operate between a Senior and Staff Engineer level, contributing to solution design, low-level design (LLD), implementation, deployment, and ongoing enhancement of enterprise-grade applications supporting government schemes, mortgage/home loan processing, and workflow automation initiatives.

Responsibilities

• Design, develop, and maintain scalable, secure, and high-performance full-stack applications using .NET and React.
• Contribute to solution architecture, technical design, and low-level design (LLD) activities.
• Build and maintain RESTful APIs, microservices, and integration services.
• Develop cloud-native solutions leveraging AWS services and industry best practices.
• Design and implement event-driven integration patterns and messaging solutions.
• Collaborate with business, product, and engineering stakeholders to deliver automation and digital transformation initiatives.
• Implement workflow automation, orchestration, and process digitization solutions.
• Ensure solutions meet security, compliance, scalability, reliability, and performance standards.
• Support CI/CD implementation, DevOps practices, testing, release management, and production support activities.
• Provide technical leadership, mentoring, and guidance to engineering team members.
• Participate in architecture reviews and contribute to engineering standards and best practices.

Required Skills

• 8+ years of software engineering experience.
• Strong experience in enterprise Full Stack Development.
• Proven experience working in complex enterprise environments.
• Strong stakeholder engagement, communication, and collaboration skills.

Backend & Full Stack Technologies

• Extensive hands-on experience with:
• C#
• React.js
• RESTful APIs
• Strong understanding of:
• API design and development
• Integration patterns
• Service-oriented architectures
• Distributed systems
• Proven experience building and deploying applications on AWS.
• Hands-on experience with:
• AWS Lambda
• API Gateway
• Amazon S3
• Amazon RDS
• Amazon DynamoDB
• AWS ECS and/or EKS (Mandatory)
• Experience with:
• Cloud-native application architectures
• Event-driven architectures
• Scalable and resilient application design
• Integration & Messaging Technologies

Hands-on experience with at least one of the following:

• Kafka
• Amazon EventBridge
• Amazon SQS
• Amazon SNS
• IBM MQ or equivalent messaging platforms
• Security & API Authentication
• Strong understanding of:
• API authentication and authorization mechanisms
• Secure API exposure to upstream and downstream systems
• Enterprise integration security practices
• Authentication and access management concepts

Mandatory experience in CI/CD and DevOps practices, including:

• Automated build and deployment pipelines
• Release management
• Monitoring and deployment automation
• Database Technologies
• Experience with:
• SQL Server
• Other enterprise relational database platforms

Preferred Skills

• Terraform
• AWS CloudFormation
• Enterprise workflow orchestration platforms