Software Engineer, AI Agent at Sierra | Sydney

About UsAt Sierra, we are revolutionizing the way businesses engage with their customers by creating a platform that enhances human interactions through AI technology. With headquarters in San Francisco and offices rapidly expanding in cities like Atlanta, New York, London, Paris, Madrid, Munich, Singapore, Japan, and Sydney, we are committed to fostering a …

WHO WE AREThe Trade Desk is a leading global technology company dedicated to enhancing the Internet through principled and intelligent advertising strategies. Our robust platform handles over 1 trillion queries daily, operating at an unparalleled scale.We pride ourselves on fostering an award-winning culture built on trust, empathy, collaboration, and ownership. By transcending traditional boundaries, we work better together, maximizing our collective potential.If you are passionate about tackling complex challenges at scale and want to join a globally-connected team where your efforts will have a significant impact, we want to hear from you!Discover why The Trade Desk has been recognized as one of the Best Workplaces in Technology.WHO WE ARE LOOKING FORWe are on the lookout for a Senior Database Engineer to collaborate closely with our engineering teams, ensuring seamless execution of database-related activities. You will relish the opportunity to investigate database issues, enhance performance, and evaluate best practices to ensure optimal functionality across our platform.WHAT YOU WILL BE DOINGProviding daily support and maintenance for Microsoft SQL Server 2019/2022 databases within our platform.Managing administration, design, performance analysis, support, proactive monitoring, troubleshooting, recoverability, failover, security, and installation.Resolving complex performance issues and developing proactive measures and trend analyses.Investigating user-reported problems and issues.Monitoring database events and continuously enhancing system performance through troubleshooting and tuning.Collaborating with engineering teams to automate reactive procedures and ensure rapid responses to database challenges.Conducting database code reviews and enforcing best practices.Designing and developing proactive tools and strategies to optimize performance and support platform scalability.Maintaining database configurations in line with established best practices.Designing and implementing systems, policies, and procedures for backup and disaster recovery.Monitoring ongoing capacity and implementing design and architectural improvements to boost global availability.Installing upgrades and patches to existing systems.

Join The Trade Desk as a Senior Software Engineer, where you will play a crucial role in developing cutting-edge technology that powers the advertising ecosystem. Collaborate with a talented team to design, build, and maintain high-performance software solutions that drive the success of our clients.

Join Canva as a Senior Software Engineer specializing in networking! In this pivotal role, you will contribute to the design, development, and maintenance of cutting-edge networking solutions that enhance connectivity and performance for our users worldwide. This is an exciting opportunity to work in a dynamic environment that fosters innovation and collaboration.

Are you a passionate and experienced leader in software engineering ready to elevate your career? Escrow.com is on the lookout for an exceptional Software Engineering Team Lead to join our vibrant and fast-paced environment!This position offers more than just a standard role; it’s an opportunity to truly make an impact. If you are a high performer with the skills and drive to thrive in a dynamic setting, and you prefer not to be micromanaged, this could be the perfect fit for you.Joining a mega-cap tech corporation may leave you feeling like just another number, while a startup might not provide the mentorship you seek. At Escrow.com, part of the Freelancer group, we are the world’s largest online escrow service, executing on a global scale with a select number of high-impact teams. This role presents an exciting opportunity to grow your team, lead technical design initiatives, and influence a global product, with tremendous potential to fast-track your engineering leadership journey.You will encounter a diverse array of engineering challenges, gaining exposure to a broad spectrum of technologies across our operations. Our cutting-edge frontend stack includes React, TypeScript, and RxJS, with code deployed to production multiple times daily.

Location: Sydney, Australia (Hybrid: 3 days per week in office) Relevance AI develops a platform for building and managing intelligent agents that help teams automate workflows and improve collaboration. The company’s technology supports major clients such as Canva, Databricks, Confluent, Autodesk, Lightspeed, Rakuten, Aveva, Qualified, and Activision Blizzard, helping them strengthen operations, marketing, and sales. Backed by Bessemer Venture Partners, Insight Partners, Peak XV, and King River Capital, Relevance AI completed its Series B funding round in April 2025. With headquarters in San Francisco and Sydney, the team values curiosity, collaboration, and decisive execution. In 2025, LinkedIn recognized Relevance AI as Australia’s #1 Startup. Role overview The Enterprise team at Relevance AI seeks a Staff Software Engineer based in Sydney. This group focuses on building and scaling platform features for the company’s largest and most demanding customers. Projects emphasize security, reliability, compliance, and adaptability at enterprise scale, with particular attention to identity and access management, auditability, and regulatory requirements. What you will do Offer technical leadership and hands-on execution within the Enterprise team Work closely with product, engineering, and go-to-market teams to deliver enterprise-grade capabilities and backend systems Design complex systems and influence architecture across teams Ensure the platform upholds high standards for security, reliability, and compliance See the direct impact of your work on customer outcomes Impact and growth Each engineering team at Relevance AI addresses a distinct aspect of the AI workforce. The Enterprise team specializes in scaling AI systems for global organizations. This role plays a key part in making AI solutions functional, dependable, and production-ready for enterprise use.

Role overview Speechify is hiring an iOS Core Product Software Engineer in Sydney, Australia. This role focuses on building and improving iOS applications that help users interact with content in new ways. The team values collaboration and creative problem solving. What you will do Design and develop features for Speechify’s iOS apps Work closely with teammates to deliver a smooth user experience Apply modern technologies to solve real user problems What we look for Experience developing iOS applications Interest in working on core product features Comfort working in a collaborative, creative environment

Cuscal Limited is seeking a Quality Assurance Engineer with strong skills in SQL, Python, and Pyspark. This position is based in Sydney and sits within the Engineering Practice, focusing on maintaining and improving the quality of software products. Role overview This role centers on collaborating with cross-functional teams to identify, document, and track software defects. The Quality Assurance Engineer will also help shape and maintain automated testing frameworks, ensuring that products meet high quality standards. What you will do Work closely with engineers and other teams to find and report defects Contribute to the development and upkeep of automated testing frameworks using SQL, Python, and Pyspark Develop and execute test plans Offer insights to improve quality assurance processes Requirements Proficiency in SQL, Python, and Pyspark Strong analytical and problem-solving skills Experience creating and running test plans Interest in technology and quality assurance Ability to collaborate with diverse teams

At The Trade Desk, we are pioneers in developing technology that is transforming the landscape of digital advertising. Our mission is to enhance the open internet ecosystem through ethical and intelligent advertising practices.Our platform manages over 1 trillion queries daily, functioning around the clock across various continents and data centers. We process vast amounts of data, delivering actionable insights and measurable results.As a Software Engineer II, you will take ownership of the entire development process, designing, building, and implementing impactful, data-driven systems that influence decisions for advertisers worldwide. We foster a culture of trust, empathy, collaboration, and shared ownership, empowering every team member to make a significant impact.We believe that exceptional systems arise from teams that trust each other, value quality craftsmanship, and take responsibility for their creations.ABOUT THE ROLE:The Measurement Upper Funnel engineering team operates out of the APAC region, with members located in Hong Kong, Shanghai, and Sydney. Our Product Manager is based on the West Coast, and we engage in a brief daily virtual standup to maintain sync. Our team is intentionally distributed, leveraging asynchronous communication and video conferencing to stay connected.Our technology team is highly productive, enjoying a collaborative work environment that engages in the end-to-end delivery of scalable tech solutions. We embrace a 'build it, ship it, own it' mentality. Our teams are encouraged to select the best tools and technologies for their projects. We operate in a multi-cloud setting and are transitioning towards a microservices architecture.We utilize technologies such as .Net/.Net Core, JavaScript (React), gRPC, REST APIs, Docker containers, and Kubernetes for our client-facing products. Our backend big data processing is powered by Apache Spark and Flink.Our engineers are end-to-end owners, involved in every phase of product development — from design and implementation to deployment and monitoring — delivering genuine value to our clients. We navigate a broad and evolving tech landscape, including Docker, Kubernetes, Terraform, GitLab, Bamboo, SonarQube, AWS, Azure, Aliyun, Databricks, and databases like SQL Server, Vertica, and ClickHouse.We actively seek out new technologies and AI-driven tools that enhance our efficiency, embracing pragmatic innovation as our projects evolve.Quality is fundamental to all we create. We prioritize code reviews, automated testing, robust deployment pipelines, metrics, and continuous monitoring to ensure scalability and reliability.Our engineers make an impact beyond code through mentorship, teaching, and leadership, contributing to a vibrant and dynamic team culture.

Join Canva as a Senior Backend Engineer and play a crucial role in shaping the future of Teams and Education. In this position, you will develop scalable backend systems using Java, collaborating with cross-functional teams to deliver high-quality software solutions. Your expertise will help enhance the learning experience for millions of users globally.

Join d-Matrix, where we are dedicated to harnessing the transformative power of generative AI to revolutionize technology. We are pioneers in both software and hardware innovation, constantly pushing the limits of what is achievable. Our culture is rooted in respect and collaboration.We embrace humility and prioritize direct communication. Our inclusive team thrives on diverse viewpoints, leading to enhanced solutions. We are on the lookout for passionate individuals eager to confront challenges and committed to execution. Are you ready to explore your playground? Together, we can unlock the infinite possibilities of AI.Location:This is a hybrid position, requiring onsite work at our Sydney, Australia office three days a week.About the Role: Senior Runtime Software EngineerYour Responsibilities:At d-Matrix, we are developing an AI inference processor aimed at accelerating inference for NLP, vision, and recommendation workloads within a data center environment. Our architecture incorporates an in-memory compute processor subsystem, utilizing both fixed and floating-point data types in dense and sparse matrix processing modes. During our seed round, we successfully developed a CMOS test chip and validated our architecture using genuine inference workloads compiled from PyTorch.As a Senior Runtime Software Engineer, you will play a vital role in the architecture, development, and validation of firmware/software that operates on the system-on-chip’s multiple processors, low-level drivers, and system programs. You will take charge of optimizing runtime performance for the silicon product, documenting and developing firmware that runs across various on-chip multi-core CPU subsystems.Your efforts will maximize hardware utilization while minimizing communication bottlenecks and enhancing on-chip memory usage. You will be responsible for bringing the software up on FPGA platforms that replicate the embedded CPU subsystems, debugging through JTAG-connected IDEs, and developing firmware solutions ahead of the AI subsystem hardware availability.Additionally, you will manage the delivery timeline and ensure compliance with d-Matrix coding and methodology guidelines while collaborating closely with hardware teams to interpret specifications and propose enhancements.

Join Escrow.com, the largest and most trusted online escrow service globally, where buyers and sellers depend on us to securely handle their funds during high-stakes transactions. Whether it's domain names, vehicles, or entire businesses, we facilitate seamless buying and selling experiences.We are currently seeking a Senior Full Stack Software Engineer to become part of our team in Sydney.Unlike mega-cap technology firms where your contributions may feel insignificant among thousands, and unlike startups where you may grapple with ephemeral projects devoid of mentorship, Escrow.com is the ideal middle ground. We are a right-sized organization where you can forge genuine connections with your colleagues while still having the resources to innovate without fear.Here, you won't be just another cog in the machine. Our work revolves around engaging and complex real-world challenges that have tangible impacts. You will tackle a diverse array of global internet-scale problems, allowing you to grow your skills in a cross-functional environment.As a member of our team, you will not only design, build, and deploy scalable features but also make a direct impact on millions of users worldwide. You'll engage in architecting web applications, writing optimized SQL for extensive data sets, structuring extensible data and application logic, and crafting high-quality APIs using a combination of open-source tools and premium commercial software.Our technology stack includes Python-based Flask (alongside some Golang) microservices, React.js for front-end development, and traditional SQL RDBMS systems, all powered by Amazon Web Services. You have the flexibility to choose your operating system for your company laptop—most of our developers prefer Ubuntu Linux, but all options are welcome!To thrive in this role, you should possess:Proficiency in several web development languages, including Python, Golang, PHP, Node.js, or Ruby.Experience with relational databases and SQL, preferably MySQL.A background or interest in scalable web engineering.The ability to collaborate within an agile team environment, consistently delivering value to customers.Familiarity with Linux.Experience in developing SaaS products.Cloud computing experience, preferably with AWS.Strong written and verbal communication skills.A keen sense of ownership with the ability to self-manage.Excellent troubleshooting and creative problem-solving skills.Experience in designing and implementing complex software systems.Previous experience in mentoring or training junior developers.

Location: Sydney, Australia (hybrid, three days per week in the office) Relevance AI develops tools for teams to delegate meaningful work to AI agents that think, act, and collaborate like seasoned professionals. The platform allows organizations to create and manage intelligent agents for workflow automation, decision-making, and collaboration. Clients include Canva, Databricks, Confluent, Autodesk, Lightspeed, Rakuten, Aveva, Qualified, and Activision Blizzard, who use these solutions to improve operations, marketing, and sales. The company is backed by Bessemer Venture Partners, Insight Partners, Peak XV, and King River Capital. In April 2025, Relevance AI completed its Series B funding round to accelerate growth and expand agentic automation. With headquarters in San Francisco and Sydney, the team works in a hybrid model that emphasizes curiosity, teamwork, and strong execution. LinkedIn named Relevance AI Australia’s #1 Startup in 2025. Role overview The Senior Software Engineer (Chat) will join the Chat team in Sydney. This group builds the conversational interface for Relevance AI’s platform, enabling users to interact with pre-built AI agents, productivity tools, and research workflows. The Chat product relies on a scalable back-end to support real-time, agent-driven conversations. Engineering teams at Relevance AI address a range of challenges, from supporting individual creators to building systems for enterprise clients. This role helps shape systems that make AI accessible, reliable, and production-ready. What you will do Develop and enhance the back-end for Chat, enabling real-time, agentic interactions Work with a modern technology stack, refined for speed and rapid iteration Lead major projects and provide mentorship to teammates See your contributions reach customers quickly, often within hours Work in an environment that values independence and minimizes unnecessary process Work environment Relevance AI provides a supportive, fast-moving setting focused on innovation and collective achievement. Engineers are encouraged to take initiative and can see the direct results of their work.

Discover Your Potential with LEAP DevLEAP Dev operates as the innovative 'Software House' behind LEAP Legal Software, the foremost provider of comprehensive Legal Practice Management Solutions globally. Being a proud member of ATI Global, one of the largest international LegalTech firms, we have spent over three decades fostering a culture of curiosity and dedication to continuous improvement. Our mission remains clear: to 'Help lawyers who help people.' Our cutting-edge software is trusted by over 70,000 legal professionals and their teams in small to medium-sized law firms.Joining our team of passionate and high-achieving professionals at LEAP means becoming part of a rapidly growing technological enterprise where change is the only constant. With a diverse workforce of over 1,000 skilled and ambitious 'LEAPsters' spanning Australia, Canada, the United States, the United Kingdom, Ireland, Poland, and New Zealand, you will find yourself among like-minded individuals striving for excellence.Join the LEAP Web TeamThe LEAP Web team is tasked with creating the foundational platform that will support all LEAP services in the future. Transitioning from a powerful desktop application that has optimized workflows for legal firms, we are now migrating these essential features to the web. Our team of Frontend Developers consists of proactive and creative thinkers who take pride in their adaptability, troubleshooting skills, and commitment to delivering exceptional user experiences.Your Role and ResponsibilitiesIn this pivotal role, you will be instrumental in evolving LEAP Web to match and ultimately surpass the functionality of the LEAP Desktop application. This initiative is paramount within LEAP Dev, and your contributions will significantly shape the future of our core platform as we guide customers through their transition to web-based solutions.You will collaborate closely with a team of seasoned Frontend Engineers who will mentor you in understanding our product and the legal landscape. Your daily tasks will involve a combination of fixing bugs, enhancing performance and stability, and developing new features and improvements. In addition to maintaining and strengthening our existing product, you will have the opportunity to share your ideas, explore innovative approaches, and drive progress in a product that is rapidly becoming the centerpiece of our ecosystem.Key Responsibilities Include:Designing and developing high-quality, responsive user interfaces using Angular and other web frameworks to ensure a seamless and engaging user experience.Enhancing the architecture of front-end components, optimizing code for performance, scalability, and maintainability.Collaborating closely with UX designers and backend developers.Taking ownership of front-end components, influencing technical direction, and establishing coding standards.Participating in agile ceremonies such as stand-ups and sprint planning.

At Mathspace, we are revolutionizing mathematics education by providing innovative, interactive learning software for students and teachers. Our agile, product-focused environment thrives on continuous customer feedback, ensuring a delightful learning experience for everyone involved.As a Senior UI Software Engineer on a collaborative product team, your contributions will significantly enhance our web and mobile applications, which support hundreds of thousands of students worldwide each month. Your role will involve:Enhancing and refining Mathspace applications to maximize educational impact.Collaborating closely with product owners and designers during product discovery phases.Working alongside fellow engineers to deliver meaningful solutions for students and teachers.Creatively solving complex problems and committing to ongoing learning and development.Taking initiative and actively contributing to project success.Expanding your knowledge of our technology stack.

At Prospa, we are dedicated to unlocking the potential of small businesses. Our mission is to build the future of small business and streamline cash flow through an innovative platform that enables customers to make payments, secure funding, and minimize administrative burden. Join us on this exciting journey! The Role As a Senior Full Stack Engineer, you will play a crucial role in developing the technology that empowers small businesses to thrive with confidence. You will engage with the entire technology stack to design, develop, and scale user-friendly, secure, and reliable systems that facilitate access to essential tools and funding for our clients' success. Within a modern, cloud-native, microservices architecture, you will collaborate closely with Product, Design, and Engineering teams to translate ideas into high-quality customer experiences. You will take full ownership of your projects, adopt a customer-first mindset, and contribute to a culture that embraces learning, experimentation, and continuous enhancement. We leverage AI-driven developer tools to elevate code quality, accelerate delivery, and decrease cognitive load, allowing you to concentrate on solving impactful challenges.

Join AECOM, a global leader in engineering and infrastructure, as we expand our Ground Engineering and Tunnelling team in Sydney. This is an exceptional opportunity to work on high-profile projects that shape the future of urban infrastructure.As a part of our dynamic team, you will engage in innovative engineering solutions, collaborate with industry experts, and contribute to groundbreaking projects that have a lasting impact on communities.

Anduril Industries is a pioneering defense technology firm dedicated to enhancing U.S. and allied military capabilities through innovative technology. By integrating the expertise, technology, and business models of the 21st century's most forward-thinking companies into the defense sector, Anduril is revolutionizing the design, construction, and sales of military systems. Our advanced suite of systems is powered by Lattice OS, an AI-driven operating system that transforms vast data streams into a real-time, 3D command and control center. As we navigate a new era of strategic competition, Anduril is committed to delivering state-of-the-art autonomy, AI, computer vision, sensor fusion, and networking technology to the military in record time.At Anduril Australia, we are at the forefront of developing unmanned systems for subsurface and other domains, leveraging unsupervised autonomy to provide long-endurance, multi-mission capabilities to our clients. Our projects, including the Extra Large Autonomous Undersea Vehicle (XL-AUV) Program, require seasoned Senior Site Reliability Engineers with extensive experience in modern software development, delivery, and sustainment toolchains. The Senior Site Reliability Engineer will utilize their expertise to swiftly architect, design, deliver, support, and evolve the toolchains necessary for the next generation of autonomous systems.

Join Canva as a Senior Software Engineer specializing in Product and Features, where you will play a pivotal role in enhancing our platform. Collaborate with a dynamic team dedicated to delivering innovative solutions and improving user experience. Your expertise in Java will be essential in developing high-quality software that meets our users' needs.

Join Our Esteemed Private Practice as a Psychiatrist in Sydney Established Referral Base | Flexible Consulting Hours | Competitive CompensationMediix Recruitment is proudly collaborating with a leading private mental health clinic in Sydney, seeking a passionate and skilled Psychiatrist to become an integral part of their expanding specialist team. This is a tremendous opportunity to either establish or enhance your private practice within a nurturing and efficiently managed environment that boasts a steady flow of patient demand.Your Role:Collaborate with a multidisciplinary team providing integrated care in a modern, purpose-designed clinic.Enjoy flexible consulting options – part-time and full-time sessions are available.Experience the freedom to work at your own pace with complete autonomy over your schedule.Receive comprehensive administrative and reception support, allowing you to concentrate on delivering exceptional clinical care.Benefit from an immediate patient load with a continual stream of referrals from GPs, psychologists, and other specialists.Earn a competitive percentage-based billing structure that offers substantial earning potential.Who You Are:Possess FRANZCP and Specialist Registration with AHPRA.Demonstrate strong clinical skills and a compassionate, patient-centered approach.Exhibit excellent communication abilities and a collaborative mindset.Welcome experience in private practice or interest in shifting from public psychiatry.Location:This clinic is conveniently situated within Sydney's metropolitan area, with easy access to public transportation and nearby amenities. Whether you aim to supplement your public work, relocate to Sydney, or fully transition into private practice, this environment provides an ideal setting to advance your career.To apply, please submit your CV using the button below. For any inquiries related to this role, feel free to contact Anna at ania@mediix.com.au. All applications will be treated with the utmost confidentiality and we encourage candidates from diverse backgrounds to apply.Mediix is an Australian-based medical recruitment agency dedicated to connecting qualified healthcare professionals with hospitals and private clinics throughout Australia. We offer personalized, complimentary services to assist healthcare professionals in securing both permanent and temporary positions, including access to unadvertised opportunities.