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Posted 14 June, 2026

Lead Software Engineer

Xpansiv
Sydney, AU Full Time
Reference: 113_529894_caadda83-21b2-4d5e-9cc2-5e0c83d69c45
Xpansiv is the leading infrastructure provider for the energy transition markets.
Our comprehensive platform includes registries, online marketplaces, market execution services, wholesale power solutions, and market data for energy and environmental commodity markets. Trusted worldwide, Xpansiv enables stakeholders to deliver transparent, credible, and auditable environmental claims to address the growing global demand for assurance and accountability on climate action and sustainability performance.
From our founding in 2009 through more than 10 acquisitions, Xpansiv has become a global leader in environmental commodity markets. We are backed by Blackstone and other leading investors.

Overview

We are seeking a highly motivated Lead Software Engineer to join our Markets Engineering team. We are looking for an engineer with a strong history determining the strategic direction of core software products in the financial markets/exchange trading space, and a willingness to be a hands-on contributor to the ongoing development of the platform. Our existing platform is a C++ central transaction processing engine using custom in memory database and surrounded by TypeScript applications connected via low-latency inter-process messaging (e.g. ZeroMQ IPC/TCP) between the C++ engine and surrounding services. The platform includes REST API clients and browser-based GUIs built around TypeScript frameworks. The ideal candidate will have more than 8 years of professional experience, and comprehensive knowledge of CI and automated deployment to a Kubernetes infrastructure in cloud environments. The successful candidate will show a passion for problem-solving and the ability to leverage their extensive experience to help their team continue the development and growth of the systems with which they will work.

Key Responsibilities

  • Design, develop, and maintain scalable applications using C++/TypeScript.

  • Develop and integrate REST APIs to support business functions.

  • Create and optimize browser-based GUIs for enhanced user experience.

  • Support and develop the monorepo build for the platform.

  • Collaborate with cross-functional teams to define, design, and ship new features.

  • Troubleshoot and resolve software defects and issues.

  • Maintain code quality through code reviews and automated tests.

  • Stay updated with the latest industry trends and technologies.

  • Provide strategic direction with new technologies to keep the systems up to date and industry leading.

  • Work with the existing senior engineers / team to, amongst other things:

  • Evolve the code generation/model pipeline safely

  • Maintain and improve engine replication and recovery design

  • API versioning and vendor OpenAPI integration

  • Find innovative solutions to the business opportunities present from your commercial colleagues, customers and partners

Qualifications

  • 8 years of professional experience in software development.

  • 3 years of technical leadership of small to medium teams.

  • Expert in C++ (C++26) and TypeScript using modern JavaScript frameworks.

  • Experience with deployment of containerized systems to Kubernetes on Google Cloud Platform

  • Experience with REST API development.

  • Experience in developing browser-based GUIs.

  • Several years' experience in financial markets.

  • Interest or skills in other programming languages such as Rust is an advantage.

  • Excellent teamwork and communication skills.

  • Strong problem-solving skills and attention to detail.

  • Ability to work in an agile development environment.

What can you expect throughout the interview process:
Step 1- Shortlisting of resume + recruiter screening
Step 2- Interview with the hiring manager
Step 3- Technical Interview with the team
Step 3- Interview with the VP
Base Salary
Compensation for this role will vary among specific regions due to geographic differentials in the labor market, actual pay will be determined considering factors such as relevant skills and experience, knowledge, education and training. However, compensation in the following regions is expected to be as follows:
Sydney: Compensation is expected to be between
$230,000-$250,000

Here at Xpansiv, we cultivate diversity, celebrate individuality, and believe unique perspectives are key to our collective success in building trust and transparency in global efforts toward net-zero future. Xpansiv is committed to equal employment opportunity regardless of race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, protected veteran status, or any status protected by applicable federal, state, or local law.
Note to Recruiters: Xpansiv does not accept unsolicited resumes or referrals from placement agencies, staffing vendors or other external parties seeking recruiting fees without a signed formal agreement.
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