Senior Fullstack Developer

ABOUT US
Live Payments is one of Australia's leading payment service providers, servicing thousands of businesses across Australia. We continue to innovate our payment solutions and expand our product offering alongside our industry leading strategic partners including Qantas Loyalty and Prospa.
ROLE AND RESPONSIBILITIES
Live Payments is seeking a talented and experienced Full-stack Developer to join our growing/ multi-national team. Reporting directly to our Vietnam based Team Leader, the Full-stack Developer will work on developing and maintain our existing and future products.
Core duties include:
Frontend Development
Develop and implement user interfaces using [protected info], [protected info], and modern front-end technologies
Build responsive, accessible UIs with CSS and Material-UI
Troubleshoot and resolve end-user issues and optimise automated processes
Backend Development
Design, develop, and maintain robust backend APIs using [protected info] (NestJS)/Golang
Build and maintain high-performance, high-throughput services with strict reliability requirements
Design and maintain scalable microservices capable of handling high transaction volumes
Ensure idempotency, consistency, and fault tolerance across processing flows
Implement robust error handling, retry strategies, and reconciliation processes
AI-Augmented Development & Collaboration
Use agentic AI tools (e.g. Claude Code, Cursor, GitHub Copilot) daily to accelerate development, automate code reviews, and improve code quality
Design effective prompts, workflows, and context strategies to maximise output from AI coding agents
Identify and implement opportunities to integrate AI agents into development workflows, CI/CD pipelines, and operational processes
Collaborate with stakeholders to clarify project requirements and recommend improvements
Conduct code reviews with a strong focus on performance, security, and reliability
Prepare and maintain comprehensive technical documentation, including SRS and design documents
Work closely with DevOps teams to improve observability, monitoring, and alerting
Required skills:
At least 5 years of proven experience in full-stack development. Advanced proficiency in JavaScript/TypeScript (ES6+), [protected info], [protected info], [protected info], NestJS, or Golang.
Strong expertise designing and integrating RESTful APIs and socket protocols, with sound backend architecture and applied security practices (authentication, authorisation, input validation, secrets handling).
Solid experience with relational databases (PostgreSQL, MySQL, SQL Server) and transactional data modelling, plus working experience with NoSQL databases such as MongoDB or DynamoDB.
Practical understanding of timeouts, retries, circuit breakers, and idempotency; deep understanding of concurrency, asynchronous programming, and multithreading.
Hands-on experience building and running services on AWS (Lambda and similar), GCP, or Azure, provisioned through Infrastructure-as-Code (Terraform, CloudFormation, or equivalent).
Proven hands-on use of agentic AI coding tools (Claude Code, Cursor Agent, GitHub Copilot, or equivalent), not limited to chat-based AI use; able to design prompts, workflows, and context strategies that get reliable output from coding agents.
Excellent communication with a strong command of English; demonstrated problem-solving, self-motivation, and effectiveness both independently and in a team.
Desirable skills:
Experience with payment gateways, fintech, or financial systems; knowledge of AS2805, ISO 8583, ISO 20022, or equivalent message formats; knowledge of PCI DSS or payment security standards. Not required; we will train the right engineer on the domain.
Strong understanding of Service-Oriented Architecture (SOA) and microservices.
Handling peak traffic, failover, and disaster recovery; rate limiting, throttling, and traffic shaping; performance profiling and optimisation.
Benefits
Social insurance contributions based on full salary, in accordance with Vietnam Labor Law.
Full salary during probation period
13th month salary & performance bonus
Generous leave: 14 annual leave days, 5 sick leave days, 3 conference leave days, and 1 birthday leave day per year
Biannual performance reviews to support your career growth
Annual health check-ups & vaccinations
Premium health insurance (covering spouse & children)
Personal learning & career development allowance (15.6 million VND/year)
Comprehensive health scheme (6.2 million VND/year)
Company laptop provided
Free parking, coffee, snacks, and more
Clear and attractive career path opportunities
Regular team dinners & team building activities
International, dynamic & friendly working environment