Senior Backend Software Engineer - Authentication & User Management

About UsAt Heidi, we're on a mission to revolutionize healthcare by creating an AI Care Partner that assists clinicians throughout the entire care process, from documentation to delivery.Our goal is to double the capacity of healthcare while ensuring that care remains deeply human. In just 18 months, Heidi has successfully reclaimed over 18 million hours for…

About UsAt Heidi, we are pioneering an AI Care Partner that empowers clinicians throughout the entire patient care journey, from documentation to the delivery of care. Our mission is to enhance healthcare capacity while ensuring that care remains profoundly human-centered. In just 18 months, Heidi has reclaimed over 18 million hours for clinicians and facilitated more than 73 million patient visits. Presently, Heidi supports over two million patient visits weekly across 116 countries and in more than 110 languages.Founded by healthcare professionals, our team combines the expertise of clinicians, engineers, designers, scientists, and mathematicians, all united by a common goal: to reinforce the human connection that is fundamental to healthcare.With nearly $100 million in funding, we are expanding our reach across the USA, UK, Canada, and Europe, collaborating with major health systems such as the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health, among others.At Heidi, we prioritize agility and effectiveness, leveraging proven methods to shape the future of healthcare. Are you ready to take on this exciting challenge?The TeamJoin the team that drives Heidi's growth. Your contributions will shape the architecture of our billing, payments, and entitlements platform, creating seamless access to essential products for our customers. As we expand into new markets and launch innovative products, every feature you develop will eliminate friction for customers and propel Heidi's revenue forward.The RoleWe are seeking a Senior Software Engineer to lead the development of backend features, possessing a robust technical acumen that translates user needs into effective solutions. Ideal candidates will have experience in a hyper-growth startup environment, particularly in building SaaS products.You will understand the key challenges faced by engineers and apply sound design principles to prioritize essential features and capabilities. Your unique ability to harmonize technical details with business requirements will enable you to transform high-level designs into practical solutions.Thriving in dynamic and flexible work environments, you will quickly navigate the complexities of developing an AI product for the healthcare sector on a global scale. We recognize that exceptional talent can emerge from diverse backgrounds; if you have a proven history of delivering technically challenging products and features, we would love to connect with you.

Join Riot Games in Sydney as a Senior Software Engineer with our VALORANT Player Dynamics Team. As a pivotal member of our team, you will engage in designing and developing crucial systems that ensure a safe and fair gaming environment. Your work will directly contribute to enhancing player experiences by leveraging community feedback and analytics.In this role, you will collaborate with cross-functional teams, leading projects that focus on delivering gameplay features and backend services. Your expertise in C++ and software development will drive the creation of innovative solutions that bring joy to our players.As a mentor to junior engineers, your influence will help shape the future of our engineering practices. You will also participate in an on-call rotation to address live service issues, ensuring the game remains enjoyable for everyone.

We are seeking a highly skilled Senior Software Engineer with expertise in AWS and Terraform to join our dynamic team at Cuscal Limited. In this role, you will be responsible for designing, developing, and maintaining cloud-based applications while ensuring the highest standards of performance and security.If you are passionate about technology and innovation, and you thrive in a collaborative environment, we would love to hear from you!

About UsAt Heidi, we are revolutionizing the healthcare landscape with our cutting-edge AI Care Partner, designed to assist clinicians from documentation to the delivery of care.Our mission is to enhance healthcare capacity while preserving the human touch in care. In just 18 months, Heidi has reclaimed over 18 million hours for clinicians and has facilitated over 73 million patient visits. Currently, our platform supports more than two million patient visits per week across 116 countries and in over 110 languages.Founded by healthcare professionals, Heidi unites a diverse team of clinicians, engineers, designers, scientists, and mathematicians, all committed to enriching the human connection at the core of healthcare.With nearly $100 million in funding, we are expanding our reach across the USA, UK, Canada, and Europe, collaborating with leading health systems such as the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health.We move swiftly in areas that matter and adhere to proven methodologies, paving the way for the next era of healthcare innovation. Are you ready to take on this challenge?Your RoleAs a Senior Software Engineer, you will play a critical role in developing backend features with a profound understanding of how technology aligns with user needs. You should have experience in a high-growth startup environment and a background in building SaaS products.Your expertise will help you navigate the challenges faced by engineers and prioritize essential features and capabilities based on design principles. You excel in connecting technical details with business requirements and transforming high-level designs into actionable solutions.You thrive in dynamic situations and appreciate the flexibility of a flat organizational structure. Your ability to navigate the complexities of developing AI healthcare products on an international scale is crucial.We believe that talent can emerge from unexpected sources; if you have a proven record of delivering technically challenging products and features, we want to hear from you.Key Responsibilities:Deliver high-quality, scalable code autonomously while considering code structure and design.Implement and refine data storage solutions.Collaborate effectively with team members to enhance product features.

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 Databricks as a Forward Deployed Engineer (FDE), where you will work closely with our most strategic clients to architect and implement customized full-stack applications and solutions on the Databricks Data Intelligence Platform, as well as other prevalent software frameworks. You will take charge of the architecture, guide design choices, and execute comprehensive systems that integrate data engineering, AI, and application development. This role is hands-on and customer-facing, ideal for software engineers, developers, and innovators who excel at the intersection of technology and business impact. The perfect candidate will possess a blend of engineering skills, flexibility, curiosity, and a fervor for addressing intricate challenges that yield quantifiable results. Your Impact: Architecture Ownership: Lead the architectural and design phases, ensuring that solutions are secure, scalable, and meet both customer requirements and Databricks best practices. Application Engineering: Create and develop applications that encompass backend, frontend, and integrations, bringing data and AI to life for enterprise users utilizing the Databricks platform. Solution Delivery: Deliver high-quality production systems, from data ingestion and transformation to ML/AI model integration and user-facing applications. Customer Engagement: Embed within customer teams, collaborating with stakeholders from technical professionals to executives to deeply understand their challenges and provide impactful solutions. Cross-Functional Collaboration: Work alongside Sales, Product, and Field Engineering to ensure a smooth customer journey from pre-sales to post-deployment. Reusable Assets & Scale: Contribute to accelerators, frameworks, and best practices that enhance impact across accounts and shape the Databricks product roadmap.

Imagine having the capability to stress-test an entire power grid against a hurricane before the clouds even gather. This is the innovative reality we are forging at Neara.By harnessing cutting-edge machine learning technology, we create engineering-grade, physics-enabled digital twins of electricity grids across four continents, empowering asset owners to identify their most pressing challenges and implement viable solutions across millions of kilometers of infrastructure.Through simulating extreme weather conditions and structural stress at a network-wide scale, we enable the world's largest utilities to identify risks, optimize investments, and contribute to a more resilient global energy future.Our team comprises brilliant minds dedicated to making a tangible difference in the real world, leveraging AI and machine learning to enhance everything from data classification to complex scenario analysis. We have cultivated a unique culture where innovation flourishes because each team member takes ownership of our mission. We seek intelligent, creative individuals to help us amplify this impact worldwide.Integrating practical security measures into our systems is crucial, and we are looking for our first in-house Senior Security Engineer to champion and elevate security as a deeply practical, engineering-focused discipline.This role transcends mere compliance; you will engage directly with code, shaping the design and operation of secure systems in practice while ensuring that security becomes the path of least resistance for everyone at Neara.Key Responsibilities:Engineering & Product SecurityConduct hands-on security reviews of code, architecture, and infrastructure.Serve as a security reviewer on pull requests and design documents.Identify and remediate vulnerabilities across back-end systems, APIs, cloud infrastructures, CI/CD pipelines, authentication mechanisms, and data flows.Utilize and fine-tune static, dynamic, dependency, and runtime analysis tools (both commercial and open-source, including AI-assisted options).Perform white-box and black-box testing, along with targeted penetration tests.Contribute to designing and enhancing defense-in-depth strategies across systems and processes.Engage early in product design, helping to prevent security issues rather than merely reacting to them.Fostering a Security Culture & Practical ImplementationPromote security best practices and awareness throughout the organization.

At Riot Games, we harness the expertise of our engineers not only in their specific technical domains but also in a variety of broader areas. As a Senior Software Engineer with the Unreal Ecosystem team, you will collaborate with a dedicated group of engineers focused on supporting plugins, tools, and systems that empower our developers and collaborators to create exceptional gaming experiences for our players. The Unreal Ecosystem (UnEco) team partners with various collaborators across Riot, working together to enhance and streamline the Unreal development environment. You will face diverse technical challenges, quickly acclimating to new subjects and tackling intricate problems in ways that not only benefit developers but also enhance the player experience. This position is based in Sydney and is a 12-month contract.

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.

Join Canva as a Senior Software Engineer specializing in Cloud Access. You will play a pivotal role in enhancing our cloud solutions using your expertise in Python, Golang, AWS, and GCP. Collaborate with a dynamic team to design, develop, and maintain scalable cloud infrastructure that supports millions of users worldwide. This is an exciting opportunity to innovate and lead within a fast-paced, growth-oriented environment.

Join our dynamic team at Cuscal Limited as a Senior Platform Engineer. In this pivotal role, you will leverage your expertise in platform engineering to drive the development and optimization of our cutting-edge payment solutions. You will collaborate with cross-functional teams to design scalable architectures and enhance system performance.As a Senior Platform Engineer, you will be responsible for implementing best practices in software development, ensuring high availability and security of our platforms. You will also mentor junior engineers and contribute to our culture of innovation and excellence.

Cuscal Limited seeks a Senior QA Engineer based in Sydney to help maintain high standards across its software products. This role centers on identifying, analyzing, and resolving defects, working closely with teams throughout the company. Role overview The Senior QA Engineer takes responsibility for software quality by collaborating with colleagues to detect issues early and ensure thorough testing. Improving and refining testing processes forms a significant part of this position. What you will do Work with cross-functional teams to locate and analyze software defects Drive the resolution of issues to maintain product quality Suggest and implement improvements to existing testing processes Location This position is based in Sydney.

Location: Sydney, Australia (Hybrid, 3 days per week in office) Relevance AI develops technology that helps teams delegate complex work to AI agents. The platform allows organizations to build and manage intelligent agents, streamlining workflows and supporting collaboration and decision-making in a single environment. Clients include well-known companies such as Canva, Databricks, Confluent, Autodesk, Lightspeed, Rakuten, Aveva, Qualified, and Activision Blizzard. Relevance AI is backed by Bessemer Venture Partners, Insight Partners, Peak XV, and King River Capital. The company completed its Series B funding in April 2025 to accelerate growth in agentic automation. With headquarters in San Francisco and Sydney, the team values curiosity, collaboration, and execution. In 2025, LinkedIn recognized Relevance AI as Australia’s #1 Startup. Role overview The Senior Staff Software Engineer will join the Chat team in Sydney. This team manages the conversational interface of the Relevance AI platform, connecting users with AI agents, productivity tools, and research workflows. The Chat system relies on a scalable back-end to support real-time, intelligent user interactions. What you will do Set technical direction and lead execution for the Chat team Collaborate with product, engineering, and go-to-market teams to deliver enterprise-grade features and back-end systems Design complex systems and influence architectural decisions across teams Create solutions that shape customer experiences directly Why this role matters Engineering at Relevance AI pushes the boundaries of the AI workforce, supporting everything from individual creators to large-scale deployments. This role helps make AI more accessible, reliable, and production-ready for organizations worldwide.

We are seeking a dynamic and experienced Software Engineering Manager to lead our talented team of software engineers at KPMG Australia. In this pivotal role, you will be responsible for driving innovation and delivering high-quality software solutions that align with our strategic objectives. You will oversee the development process, mentor team members, and collaborate with cross-functional departments to ensure project success.

Join our innovative team at Speechify as a Software Engineer focused on platform development. In this role, you will collaborate with cross-functional teams to design, develop, and implement high-quality software solutions that enhance our platform's capabilities and user experience.

Join Lendi Group as a Mid-Level Software Engineer and be a key player in our dynamic tech team. You will be responsible for developing innovative software solutions that enhance our platform and improve user experience. Collaborate with cross-functional teams to design, implement, and maintain high-quality software applications.

Join Canva as a Senior Software Engineer on our Cloud Compute Team, where you will play a pivotal role in designing, developing, and maintaining our cloud infrastructure. You will leverage your expertise in Golang and Kubernetes to build scalable and efficient solutions that empower millions of users worldwide.As part of a dynamic and innovative team, you will collaborate with cross-functional teams to enhance our cloud services, ensuring reliability and performance. This is a fantastic opportunity for passionate engineers who thrive in a fast-paced environment and are eager to contribute to a product that is revolutionizing design.

About Ticketek Entertainment GroupAt Ticketek Entertainment Group, we are dedicated to creating unforgettable fan experiences. As a premier global entity, we specialize in ticketing, promoting, and delivering live events that resonate with audiences worldwide. In a fast-paced, distraction-filled world, we believe nothing surpasses the thrill of real-life interactions. Our mission? To enrich lives through live experiences!Our portfolio encompasses our Fan Experience Platform, Ticketek, which not only sells tickets but also offers a suite of value-added services. Additionally, we engage in event promotion across various sectors including Sports (TEG Sport), Touring (TEG Touring), and Family Experiences (TEG Experiences). Our digital enterprise, Ovation, is dedicated to providing seamless, data-driven solutions for our fans and partners.About the Role:As a Senior Android Engineer on our Agile Scrum team, you will spearhead technical design and ensure code quality, while also mentoring junior developers. Collaborating closely with architects and leadership, you will guide the team’s technical strategy and guarantee the delivery of superior software solutions.Your Daily Responsibilities:Lead and mentor a high-performing development team within an Agile/Scrum framework, working with business stakeholders to align technical delivery with commercial objectives.Architect and optimize high-speed, scalable applications in a serverless AWS environment (Lambda, Kinesis), ensuring optimal performance and swift resolution of technical issues.Oversee the entire SDLC—from requirements gathering to deployment—by collaborating with cross-platform teams and investigating the latest AI technologies to enhance the Android ecosystem.Maintain rigorous quality standards through thorough peer reviews, proactive bug-fixing, and ongoing maintenance of existing client applications to ensure stability and adherence to best practices.Work with stakeholders and cross-functional engineering teams to define, develop, and sustain robust client applications that adapt to evolving business requirements.

Join us at Freelancer as a Software Engineering Manager, where you will lead dynamic teams of engineers in driving our mission forward.This role is not for the faint-hearted or those seeking a mundane corporate job. If you are a high achiever looking to make a difference, eager to collaborate with top talent and thrive without constant supervision, this position is tailored for you.Unlike being just another number at a mega-cap technology firm, or getting lost in the shuffle of a startup, at Freelancer, you have the opportunity to tackle a diverse range of global challenges that genuinely matter. Here, your contributions will have a significant impact, and you will rapidly enhance your skills in a meritocratic environment that promotes from within.Our mission is to create one billion jobs, making a real difference in people's lives around the globe. At Freelancer, you will engage with a wide array of engineering challenges across our platform. We are an Alexa top 1000 site with a modern frontend stack utilizing Angular, TypeScript, and RxJS, and our backend supports a vast global marketplace encompassing messaging, payments, translations, file services, and a notification system that delivers millions of notifications each hour. We deploy code to production multiple times daily.