Senior Software Engineer at The Trade Desk | Sydney

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

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 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.

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.

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.

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.

Join Cuscal Limited as a Software Engineer specializing in Java and SQL. In this pivotal role, you will contribute to the development of innovative software solutions that enhance our services and support our clients. Collaborate with a talented team of developers to design, implement, and maintain robust applications that meet our users' needs.

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.

We are expanding our engineering team and are seeking talented Full-Stack Software Engineers to elevate our company to new heights.This role is not your typical corporate position. If you're a high achiever with exceptional skills, looking for more than a mundane job, eager to collaborate with the brightest minds, and thrive without constant supervision, this is the opportunity for you.Joining a large tech company as the 10,000th employee may make it difficult to see your impact. Conversely, at a startup, you might work on temporary projects with limited mentorship and minimal chance to effect real change.At Freelancer, you will tackle a diverse array of global, internet-scale challenges that offer you real responsibility and the chance to make a substantial impact while rapidly enhancing your skills. We champion a meritocratic environment, actively promoting from within.Our mission is to create one billion jobs, and we genuinely make a difference in providing opportunities and income to individuals worldwide. Freelancer truly stands out in this regard.You will encounter a wide variety of engineering challenges. You’ll have the chance to work with an extensive range of technologies across our platforms. Freelancer.com is an Alexa top 1000 website, featuring a modern frontend stack that includes Angular, TypeScript, and RxJS. Our backend supports a robust suite of services that power a global marketplace including messaging, payments, translations, file services, and a notification system that sends millions of notifications every hour. We deploy code into production multiple times a day.

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.

Our MissionAt Datacom, we strive to collaborate with organizations and communities throughout Australia and New Zealand to create impactful changes in people's lives. We empower businesses to harness the strength of technology for innovation and growth.About the RoleIn the position of Software Licensing Specialist, you will play a pivotal role in achieving predefined revenue targets by sourcing and securing Software Licensing opportunities from both new and existing clientele. Your focus will be on customer satisfaction and maintaining consistent communication with clients. Collaborating closely with both regional and national teams, you will contribute to the execution of our licensing strategy.Key ResponsibilitiesAssess and identify the current and future Software Licensing requirements of clientsDeliver tailored solutions to address client needs and drive revenue growthFoster a partnership approach with clients, providing valuable insights and guidance rather than merely transactional interactionsMaintain ongoing communication with clients, offering updates on licensing programsCoordinate with the regional team to strategize software renewalsNegotiate pricing and volume discountsOversee the preparation of Software Licensing proposals, bids, contracts, and Account Management plansAnalyze clients' business needs and contribute to strategic planning of information systems and software directionsMeet budgeted revenue targets as aligned with team KPIs and metricsWhat You BringYou possess a track record of collaborating with software vendors (directly or indirectly) and have a knack for developing innovative software solutions tailored to client needs. Your comprehensive understanding of the Cloud Solution Provider program and Microsoft technologies further enhances your capability. You bring strong interpersonal skills and industry connections, with a commitment to client-focused service delivery. Your adept time management and diligence foster timely project completion, while your collaborative spirit helps establish credibility in client management and software sales.

Who We AreAt Heidi, we are revolutionizing healthcare by developing an AI Care Partner that empowers clinicians throughout the entire care process, from documentation to care delivery.Our mission is to enhance healthcare capacity while ensuring that care remains profoundly human. In the past 18 months, Heidi has reclaimed over 18 million hours for clinicians and facilitated more than 73 million patient visits. Currently, over two million patient visits each week are supported by Heidi across 116 countries and in over 110 languages.Founded by healthcare professionals, Heidi unites clinicians, engineers, designers, scientists, and creatives who share a common goal: to fortify the human connection at the core of healthcare.With nearly $100 million in funding, Heidi is expanding its reach across the USA, UK, Canada, and Europe, collaborating with leading health systems including the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health, among others.We act swiftly where it matters while remaining grounded in proven methodologies, shaping the future of healthcare. Are you ready to take on the challenge?The TeamYou will be part of a dynamic team building the collaboration layer that enables clinicians to work together seamlessly for improved patient care, from small clinics to extensive hospital networks. Your contributions will enhance direct sharing, role-based access, and detailed permissions through innovative technology inspired by Project Zanzibar. Every feature you develop ensures patient data security while alleviating the inefficiencies that hinder clinical teams.The RoleAs a Senior Software Engineer, you will be in charge of executing backend features, possessing a profound technical understanding of how these translate into user needs. Your experience in a rapidly growing startup environment and building SaaS products will be invaluable.You will comprehend the critical challenges engineers encounter and possess a solid grasp of design principles to prioritize essential features and capabilities.Your unique ability is bridging the divide between technical specifics and business requirements, transforming high-level designs into tangible solutions.You thrive in high-pressure situations and understand the dynamics of a flexible, flat-structured work environment. Your expertise in navigating the complexities of developing an AI product for healthcare on a global scale is crucial.We believe that exceptional talent can emerge from unexpected places; if you have a proven history of delivering technically challenging products and features across any industry, we would love to hear from you.

Join Mable, a trailblazer in the healthtech sector, where our mission is to foster meaningful and positive transformations in the care and support landscape. We are committed to embracing technology as a catalyst for change and empowering individuals to achieve better outcomes through our innovative platform.As a Principal Engineer, you will be instrumental in defining our technical vision and leading a team of talented Staff Engineers. Reporting directly to the CTO, you will navigate the intersection of technology and business strategy, driving the evolution of our key engineering systems and practices.We are seeking a visionary leader who excels in tackling complex challenges and is passionate about mentoring emerging engineering talent, ensuring we uphold our commitment to excellence.

Join Mable, a key player in the Attain Healthtech Group, where we are committed to transforming the care and support sector for individuals with disabilities and older Australians. Our mission is clear: to foster positive change through technology that empowers our clients to achieve better outcomes.As part of the Mable team, you will work in a vibrant, high-performing environment that prioritizes innovation and reliability, contributing to the enhancement of our healthtech platform.About the RoleWe are looking for a Senior Full-Stack Engineer with a strong emphasis on backend development. You will be integral in delivering reliable functionality and ensuring our platform remains stable through thoughtful problem-solving. Your expertise will help us tackle complex backend challenges and innovate technical solutions, enhancing the efficiency and resilience of our platform.

Join the innovative product team at Squiz as we work to create a cutting-edge cloud-based Digital Experience Platform (DXP) equipped with vital capabilities such as Content Management, Optimization tools, and Platform services.We are on the lookout for talented Mid-Level Fullstack Software Engineers (with a backend focus) to enhance our product engineering team on a permanent basis. You will play a key role in enhancing the DXP's capabilities and have the opportunity to engage with AI technologies while collaborating with some of the brightest engineers in the industry.Location: We embrace flexibility! This position is open to candidates located on the east coast of Australia, including Sydney, Melbourne, and Brisbane. Our hybrid work model allows you to choose your work environment to suit your lifestyle.Key Qualifications:A Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field, or equivalent professional experience.A minimum of 5 years of hands-on experience in software development, particularly in building and maintaining large-scale software products.Proficiency in full-stack development, with strong skills in web-based languages and frameworks such as Node, TypeScript, React, and familiarity with cloud platforms like AWS.Solid understanding of testing principles, with demonstrated experience in implementing testing strategies to ensure software quality and robustness.Comfortable working within Agile or iterative development methodologies, primarily Scrum, with some teams adopting Kanban.Strong grasp of secure coding practices, especially standards set by OWASP.Experience mentoring junior and mid-level software engineers.Daily Responsibilities:Collaborate with a team of 3-5 software engineers to develop our Digital Experience Platform. Each team includes a Team Lead and engineers at various levels—junior, mid, and senior.Write and refine robust application code that fulfills all technical requirements.Work with team members to create User Stories, Acceptance Criteria, and estimates.Guide junior engineers and provide support to senior engineers.Draft and maintain comprehensive software documentation.Assist Team Leads and Engineering Managers in creating and executing technical roadmaps.Champion best practices in software development, code quality, and architecture across our tech stack, including Node, TypeScript, React, AWS, Cloudflare, and GitLab CI/CD.Note: This position is exclusively available for residents of Sydney, Melbourne, or Brisbane, and we do not offer sponsorship for this role.Why choose to work at Squiz?You’ll collaborate with a dynamic team focused on innovation and excellence while enjoying the flexibility to work in a way that suits you.

Join our dynamic team as a Staff Software Engineer at Freelancer in beautiful Sydney. In this role, you will leverage your extensive experience to design, develop, and optimize scalable software solutions that drive our platform's success. You will collaborate with cross-functional teams to deliver high-quality products and enhance user experience.As a Staff Software Engineer, you will be responsible for leading technical initiatives, mentoring junior engineers, and ensuring best practices in software development are followed. You will play a crucial role in shaping the future of our technology stack and influence key architectural decisions.