Principal Software Developer

Senior Software Developer Join to apply for the Senior Software Developer role at OneStop. Why choose OneStop? Established in Sydney in 2002, OneStop has grown to support organisations across the globe, connecting people, goods & technology. Our mission is to deliver seamless, secure, real-time data‑fuelled connections that power the logistics of delivery. We strive to modernise the movement of goods and provide supply chain participants the best on‑the‑go IT solutions and services. At OneStop We Promote a positive work‑life balance, primarily working from home in an ultra‑hybrid model. Provide ongoing training, development & career opportunities. Are a team of customer‑centric, agile innovators. Have regular all‑staff collaboration days. Find out more about why you should become part of team OneStop by visiting At OneStop we want you to bring your true self to work. We are energised by our individuality, unique perspectives, and differing experiences. We believe that all team members should feel valued, respected and safe irrespective of their sex, marital status, race, age, sexual orientation, gender history, religious, political beliefs, impairment, family responsibility or family status. We Champion a “Safe To Fail” Environment In Which We Learn From Each Other, Share Ideas And Are Guided By Our OneStop Values Of We are purposeful - We make things simple - We are inventive - We achieve together Opportunity at OneStop We are seeking an experienced Senior/Principal Software Developer to start in January 2026 on an initial 6‑month contract. You will be responsible for strategising development goals and ensuring that the new and existing products in your portfolio perform effectively. Using a combination of technical know‑how and architectural skills, you are responsible for designing solutions, implementing strategies, monitoring project life cycles, and identifying ways to continuously improve our technology. In This Role of Senior/Principal Software Developer You Will Work closely with the Development Manager and Solutions Architect to support the team with technical processes and decision making. Act as a role model for the Developers within your team, motivating and mentoring them to continuously improve. Design and develop new and existing products in your portfolio. Contribute to and maintain the standards of development for OneStop products. Ensure high quality standards of delivery by analysing industry patterns, practices, reviews, documentation, and usage of unit testing frameworks. Maintain priorities for technical changes relating to reducing technical debt, new technical capabilities, scalability, and general improvements to the product/s. Ensure unit testing and automated testing is maintained and implemented into the CI/CD pipeline for any release into production. Identify opportunities to reduce costs and simplify solutions. Provide third level support for Service Delivery. Research and investigate new technologies and programming languages to advance OneStop systems into the future. Assist in development of an appropriate High Availability / Disaster Recovery / Business Continuity plan for OneStop IT systems. Identify and develop monitoring sensors to allow monitoring of products to alert if any attention is required. Liaise with the key stakeholders to improve OneStop products, ensuring assigned tasks are delivered in an appropriate and timely fashion. Liaise with external consultants, suppliers, and management providers. What we’re looking for? Ideally You Will Have 10+ years working experience using Microsoft technology stacks. 5+ years programming experience, with exposure to Microsoft C#, .Net and .Net framework. 3+ years application design and architecture experience. Experience working with Cloud platforms and on serverless computing using applications such as AWS (Lambda) and Azure functions. Experience building DevOps pipelines using Jenkins or equivalent. PL/SQL development experience with databases. Experience using JavaScript/TypeScript. Messaging systems experience such as Amazon SNS/SQS or equivalent. Experience with Front End technologies such as Angular/React or equivalent. Unit testing and automated testing experience. (Desirable) Experience as a Technical Lead or mentoring a team of developers. (Desirable) Experience deploying application on containers. (Desirable) Infrastructure as Code using Terraform/Ansible or equivalent. What’s next? We look forward to receiving your application if you have the right to live and work in Australia. Please note that while OneStop offers a highly flexible working environment, our employees must be based in Sydney or live within a reasonable commuting distance of our Sydney office. For more detail, follow the link to apply via our careers website: Agencies - Please note that we are recruiting for this position directly and will not be engaging agency partners or accepting resumes. Seniority level Mid‑Senior level Employment type Full‑time Job function Information Technology Industries IT Services and IT Consulting #J-18808-Ljbffr