Senior Backend Software Engineer - Canada

Join Centari as a Senior Backend Software Engineer!At Centari, we revolutionize high-stakes dealmaking by unlocking the power of private deal data. Our innovative deal intelligence platform is paving the way for a new era in law and finance, transcending mere automation to embrace data-driven decision-making. Our proprietary Deal Reasoning Engine converts co…

About MagicalMagical is an innovative automation platform that integrates cutting-edge AI technology into the healthcare sector, providing AI agents capable of functioning effectively in real-world settings.Our mission is to create 'AI employees' that streamline tedious and time-consuming processes, specifically in healthcare—a massive $4 trillion industry laden with administrative burdens. We focus on automating critical tasks such as claims processing, prior authorizations, and eligibility checks, allowing healthcare professionals to dedicate more time to patient care.Our AchievementsAs pioneers in the transition to agentic automation in healthcare, we have achieved significant traction:Dramatic revenue growth with clients expanding into new workflows ahead of contract renewals.Rapid proof-of-concepts completed in just 7 days, delivering tangible value in an industry where similar timelines typically span months.Self-repairing automations with production-level reliability at scale, outperforming competitors who struggle to launch functional solutions.Unlike many AI firms that make grand promises, we provide dependable solutions that yield measurable outcomes. Our backing includes notable investors such as Greylock, Coatue, and Lightspeed, with a total funding of $41M. Our founder, Harpaul Sambhi, is a seasoned entrepreneur who previously sold his first company to LinkedIn.Role OverviewIn your role as a Senior Backend Engineer on the Agent Platform team, you will develop the core systems that drive our AI agents—covering aspects from orchestration and state management to model integration and evaluation pipelines. This position is centered around platform engineering, focusing on building the infrastructure that empowers our team to deliver reliable, production-grade agentic automation.You will work at the forefront of multi-agent systems, designing collaborative strategies for agents to tackle complex healthcare workflows. You will take ownership of essential backend services, overseeing them from architecture to deployment while developing verification systems that ensure our agents perform accurately every time.This hybrid position requires you to be onsite in our Toronto office two days each week.

Marqeta is seeking skilled Senior Backend Software Engineers to become part of our dynamic Engineering team. In this role, you will develop high-performance software that supports Marqeta's backend services. Your responsibilities will include creating and reviewing engineering design documentation, enhancing our systems, infrastructure, and processes, developing new features, conducting code reviews, and collaborating with a diverse group of stakeholders across the organization. As a Backend Engineer, you will deliver meaningful products that contribute to Marqeta's position as a leader in modern card issuing. You'll have the opportunity to innovate on system architecture, produce impactful software, and mentor junior engineers. Participation in a rotational on-call pager duty is a required aspect of this role, with specifics varying by team. This will be discussed further during the interview process. We embrace a Flexible First approach, allowing this role to be performed remotely from anywhere within Ontario or British Columbia, Canada. We would love for you to join our team! This posting is for multiple Senior Software Engineering positions across Marqeta.

Join Waabi, an innovative leader in Physical AI, founded by AI pioneer Raquel Urtasun. We are pioneering the future of autonomous transportation, developing cutting-edge technology for commercial autonomous trucks and robotaxis. Our esteemed team collaborates with top-tier partners across AI, automotive, logistics, and deep technology sectors.With offices located in Toronto, San Francisco, Dallas, and Pittsburgh, Waabi is rapidly expanding and is in search of diverse, innovative, and collaborative individuals eager to make a positive impact on the world. For more information, please visit: www.waabi.aiAt the heart of Waabi’s mission is our groundbreaking simulation technology. Our state-of-the-art closed-loop simulation engine, Waabi World, employs the latest generative AI technologies to create a highly realistic environment for training and evaluating self-driving systems. The Simulation Platform team is tasked with delivering a modular, scalable platform that seamlessly integrates the onboard autonomy system, intelligent actor models, and sensor simulation.Key Responsibilities:- Enhance and contribute to Waabi World, our advanced self-driving simulator, to expedite the development of autonomous vehicles.- Optimize the scalability and performance of the simulation platform to facilitate efficient simulations at a massive scale.- Design and develop orchestration software that interconnects simulation subcomponents, including the autonomy system, data-driven actor models, and sensor simulations powered by generative AI.- Engage in technical and architectural discussions, collaborating with researchers and engineers to share insights and innovative ideas.- Collaborate closely with internal users to grasp their needs and workflows, proposing new features to enhance their experience with the simulator.- Promote best practices and set standards for software development.- Lead complex cross-functional technical projects that have a significant impact across Waabi's systems and the organization as a whole.

ZoomInfo Technologies Inc. seeks a Senior Software Engineer based in Toronto, Ontario. This position centers on building and enhancing software that drives a data-focused platform. Collaboration is key, as the role involves working with colleagues from various teams to design, develop, and refine new features. Strong attention to performance and scalability is expected throughout the development process. Responsibilities Lead the development of new software solutions for the platform Collaborate with cross-functional teams to design and deliver features Implement and optimize code to ensure high performance Support the platform’s scalability as usage and data volume increase What Success Looks Like Success in this role means delivering reliable, high-performing features that scale with the platform’s growth. The Senior Software Engineer will play a key part in shaping the technical direction of the product while partnering closely with peers across the company.

Join Our TeamAt Air-tek, we are revolutionizing airline operations through the power of intelligent automation and cutting-edge, scalable systems. Based in Toronto, our Canadian software company is making significant strides in a vast global market, and we’re just getting started.Operating in a stealth mode, we focus on innovation and global expansion, even as our name becomes synonymous with industry excellence.We are a collective of builders, problem-solvers, and innovators dedicated to streamlining airline operations to be more seamless, data-driven, and focused on the passenger experience. Our culture is built on trust, collaboration, accountability, and continuous improvement, allowing every engineer the opportunity to experiment, take ownership, and make a meaningful impact.

We are seeking a talented and experienced Senior Software Engineer to join our dynamic team at Speechify. In this role, you will play a crucial part in enhancing our core experiences, developing innovative software solutions, and ensuring optimal performance across our platforms. You will collaborate closely with cross-functional teams to deliver high-quality products that meet the needs of our users.

Elevate Your Career with Loopio! At Loopio, we are searching for a visionary Senior Engineering Leader to spearhead our Site Reliability Engineering (SRE), Infrastructure, and MLOps teams. In this pivotal role, you will architect the foundation of reliability, scalability, and cost efficiency for our platform's systems.You will guide teams responsible for designing, building, and operating our production infrastructure, ensuring our services remain resilient, observable, and primed for expansion as we incorporate cutting-edge AI and automated workflows. Collaborating closely with Product Engineering, Security, and Data teams, you will facilitate rapid, secure delivery while upholding operational excellence.Note: This position is an existing vacancy within our team. Key ResponsibilitiesLeadership & Team DevelopmentLead and nurture multiple teams across SRE, Cloud Infrastructure, and MLOps.Mentor engineering managers and senior contributors, cultivating a culture of ownership and high standards.Foster a 'Platform-as-a-Product' mindset, ensuring infrastructure and ML tools empower the wider engineering organization.Collaborate with Recruiting to attract and retain top-tier talent in the areas of cloud, reliability, and machine learning infrastructure.Reliability & Operational ExcellenceOversee the operational health of production systems, focusing on availability, latency, and durability.Define and refine SLIs, SLOs, and error budgets to promote data-driven reliability decisions.Lead incident response efforts, championing blameless postmortems and systemic improvements to minimize

About the Opportunity:Join our dynamic team at Tubi TV as a Senior Software Engineer with a focus on Rust. In this pivotal role, you will spearhead the advancement of our backend platform and its associated tooling. Your expertise will be crucial in developing and maintaining key Rust-based infrastructures that will propel Tubi into its next growth phase.You will design and implement high-performance, secure, and scalable systems while collaborating extensively with teams dedicated to compliance, privacy, experimentation, and infrastructure. This position demands a self-motivated individual who can work independently across system domains and mentor fellow engineers while shaping our technical strategy.We are particularly keen on candidates who are eager to integrate AI-driven coding tools (such as Claude Code, Cursor) into their workflow to enhance productivity and code quality. Previous experience with these tools is advantageous.

At Veeva Systems, we are at the forefront of revolutionizing the life sciences industry. As a mission-driven organization and a leader in industry cloud solutions, we empower life sciences companies to accelerate the delivery of therapies to patients. Our impressive growth trajectory has propelled us to surpass $2 billion in revenue last year, and we are excited about the extensive opportunities ahead.Our core values—Do the Right Thing, Customer Success, Employee Success, and Speed—define who we are. Notably, we made history in 2021 by becoming a public benefit corporation (PBC), committed to balancing the needs of our customers, employees, society, and investors.As a Work Anywhere organization, we offer you the flexibility to work from home or in our office, allowing you to thrive in your preferred environment.Join us in transforming the life sciences sector and making a positive impact on our customers, employees, and communities.The RoleWe are looking for a talented engineer to join our dynamic team in creating innovative full-stack products within a startup-like environment supported by a profitable enterprise. Ideal candidates will have substantial experience with Java, JavaScript, and contemporary open-source technologies.

About the Role MongoDB is looking for a Senior Software Engineer to join the Server Security team in Toronto. This group sits at the heart of MongoDB’s engineering organization, building security features that help users protect their data worldwide. The work spans core elements of the MongoDB database, with a focus on security, reliability, and performance. What You Will Work On Cryptography: Develop and maintain cryptographic features such as Queryable Encryption, at-rest encryption, and other foundational crypto components. Identity & Access: Design and improve authentication and authorization systems, manage TLS, and handle X.509 certificate processes. Network Security: Build high-performance networking protocols using PKI, hashing, and certificate revocation lists (CRLs). System Integrity: Strengthen resilience, observability, and compliance across MongoDB’s distributed database infrastructure. Team Culture The Server Security team values inclusivity, diversity, and close collaboration. Engineers here apply distributed systems concepts to advance the security of a widely used database platform. The work supports application developers, system architects, and database administrators around the globe.

Veeva Systems is a purpose-driven organization at the forefront of industry cloud solutions, dedicated to helping life sciences companies accelerate the delivery of therapies to patients. As one of the most rapidly expanding SaaS companies ever, we achieved over $2 billion in revenue in our latest fiscal year, with significant growth opportunities on the horizon.Our core values at Veeva—Doing the Right Thing, Customer Success, Employee Success, and Speed—guide our journey. We are not just another public company; we made history in 2021 by becoming a public benefit corporation (PBC), committed to balancing the interests of our customers, employees, society, and investors.As a Work Anywhere company, we empower you to choose your ideal work environment, whether at home or in the office, enabling you to thrive.Join us in transforming the life sciences industry and making a meaningful impact on our customers, employees, and communities.

Are you prepared to drive global connections?If you feel you may not meet every requirement listed below but are still interested in this opportunity, we encourage you to apply. No one fits every criterion – we are looking for candidates who excel in certain areas while also showing interest and capability in others.Role Overview:As a member of the Developer Experience (DevX) team at Kong, you will be instrumental in designing, developing, and sustaining microservices and APIs that empower the Konnect Developer Portal. This portal serves as the primary gateway for our customers' users to discover, experiment, and integrate with APIs hosted on the Konnect platform. Collaborating closely with both Engineering and Product teams, your contributions will significantly influence the business trajectories of Kong and its clientele.Your Responsibilities:Develop and sustain microservices and APIs that drive the Konnect Developer Portal, including configuration management, API catalogs, documentation solutions, authentication setups, metering, and subscription services.Craft and execute solutions for moderately complex technical challenges.Provide operational support for services in production, including participation in an on-call rotation.Create automated tests to ensure code behavior and prevent regressions.Perform any additional tasks assigned by your manager.What You'll Bring:At least 5 years of experience working collaboratively to develop, deliver, and maintain intricate software solutions.Proficient in Typescript, Javascript, and modern NodeJS frameworks such as NestJS.Experience with relational databases like PostgreSQL.Background in developing and maintaining SaaS platforms.Familiarity with version control using git and GitHub workflows.Experience in test-driven development and automated testing methodologies.Exceptional verbal and written communication abilities.Preferred Qualifications:Familiarity with Golang, Kubernetes, Docker, Kafka, CDC, and Flink.Full-stack capability.A genuine passion for API development and integrations.

Okta is looking for a Senior Software Engineer to join the End User Protection team in Toronto, Ontario. This group strengthens security for Auth0, Okta’s widely used authentication and authorization platform. Auth0 handles more than 100 million logins each day, supporting organizations that need both ease of use and strong safeguards for their users. Focus of the End User Protection Team This team develops and enhances Attack Protection features within Auth0. Their work targets threats such as credential stuffing and password spraying, which can compromise accounts and expose sensitive data. By monitoring login activity, the team identifies and blocks malicious behavior, always aiming to protect users while keeping the login process smooth and simple. Collaboration is key here. Engineers work closely with Machine Learning and AI experts to design and deploy detection models that adapt to new cyber threats. The shared goal is a secure, seamless login experience for everyone who relies on Auth0. What Motivates This Work Identity sits at the heart of Okta’s mission. The company builds trusted, neutral infrastructure to protect both human and AI identities, enabling organizations to adopt new technology with confidence. The problems tackled in this role are complex and have direct, real-world impact, requiring initiative, speed, and precision.

Join our innovative team at Zip as a Senior Software Engineer in Online Storage. In this pivotal role, you will design, develop, and optimize our online storage solutions, ensuring a seamless user experience. Your expertise will directly influence the performance and scalability of our storage systems, making a significant impact on our customers' satisfaction.As a key member of our engineering team, you will collaborate with cross-functional teams to deliver high-quality software solutions that meet the evolving needs of our users. If you are passionate about cutting-edge technology and thrive in a fast-paced environment, we want to hear from you!

Empower Every Identity, from AI to HumanAt Okta, we believe that identity is the cornerstone of unlocking AI's full potential. Our mission is to provide a secure, neutral infrastructure that allows organizations to thrive in this new era. This role requires a deep commitment to tackling complex challenges that have real-world implications. We are seeking innovative builders and owners who act swiftly and execute with precision.This is your chance to engage in work that defines your career. We are fully dedicated to this mission, and if you share our enthusiasm, we want to hear from you.At Okta, exceptional technology is the product of exceptional individuals, and we continually seek team members who bring energy, passion, commitment, and collaboration. These traits have been pivotal in shaping Okta into the outstanding company it is today.What do we create? Auth0 is an authentication and authorization platform crafted by developers, for developers. Our goal is to ensure user logins are safe, secure, and seamless. We aim to protect the world's identities, enabling innovators to innovate—a significant endeavor that relies heavily on teamwork.We are currently in search of a Senior Software Engineer to join our elite Extensibility Engineering team. You'll play a critical role in enhancing our ultra-low latency, secure, and scalable platform for executing untrusted code. This position offers the opportunity to make a substantial impact on the foundation of Auth0's ecosystem, benefiting our customers and partners immensely.

Join Block, Inc. as a Senior Software Engineer within the Cash App Banking team. In this pivotal role, you will leverage your extensive programming skills to develop and maintain high-quality banking applications that provide seamless financial services to our users. You will collaborate closely with cross-functional teams to design innovative solutions that enhance user experience and drive business objectives.

Achievers is looking for a Senior Backend Software Engineer to join the Data Intelligence team in Toronto. This role centers on building and maintaining backend services that transform data from our SaaS platform into actionable insights for clients. Role overview As part of the team, you will design and develop backend systems using Python and Go. Our services run on a microservices architecture, deployed with Google Cloud Platform and Kubernetes. The focus is on delivering intelligent, high-impact solutions that help organizations use their data more effectively. What you will do Develop and maintain backend services that process and analyze platform data Work with Python and Go in a microservices environment Deploy and manage services on GCP and Kubernetes Help create seamless and valuable user experiences by solving engineering challenges at scale Requirements Experience with backend development using Python and/or Go Familiarity with microservices architecture Experience deploying services on Google Cloud Platform and Kubernetes Strong problem-solving skills and ability to work on large-scale systems Note: This position is focused on backend engineering, not data engineering.

Join BitGo, a leading provider of digital asset infrastructure solutions, where we empower clients to securely navigate the evolving landscape of digital assets. Since our inception in 2013, we have established a trusted global presence, providing custody, wallets, staking, trading, financing, and settlement services. Serving thousands of institutions, including top brands and millions of retail investors, BitGo is recognized as the largest independent digital asset custodian and staking provider globally. For further details, visit www.bitgo.com.This position requires full-time onsite work at our Toronto office to foster collaborative team dynamics and innovative problem-solving.We are looking for a Senior Software Engineer to architect and build the next generation of trade settlement infrastructure tailored for institutional cryptocurrency trading. You will create robust state machines and event-driven microservices that underpin our order management and double-entry accounting systems.

At Tenstorrent, we are at the forefront of pioneering AI technology, setting new standards for performance, usability, and cost-effectiveness. As AI reshapes the technological landscape, our solutions are evolving to integrate advancements in software models, compilers, platforms, networking, and semiconductors. Our talented team has designed a high-performance RISC-V CPU from the ground up, driven by a passion for AI and a commitment to building the leading AI platform. We prioritize collaboration, curiosity, and tackling challenging problems, and we are expanding our team to include contributors of all experience levels.Become a vital part of the team transforming AI computing at Tenstorrent. You will engage with TT-Forge, our MLIR-based compiler that allows developers to optimize AI workloads across all configurations of Tenstorrent hardware using an open-source, efficient, and versatile compiler. You will be at the cutting edge of the AI hardware revolution, contributing to compiler technologies that expand the horizons of what’s achievable.This position offers a hybrid work environment based in Toronto, ON.We encourage applications from candidates with varying levels of experience. During the interview process, we will assess candidates to determine the appropriate level, and offers will align accordingly.