Backend Software Engineer (Infrastructure-Focused)

As a Senior Backend Software Engineer at Affirm, you will play a pivotal role in shaping our streaming infrastructure. You will collaborate with cross-functional teams to design, develop, and optimize backend systems that support our innovative financial solutions. Your expertise will help enhance the scalability and reliability of our services, ensuring a seamless experience for our users.

Principal Software Engineer - Backend Infrastructure (Remote)Are you a visionary technical leader eager to shape the future of financial infrastructure? As a Principal Software Engineer at mlabs, you will play an instrumental role in developing cutting-edge backend systems that support secure and resilient financial operations. This remote-first position offers the flexibility of working from anywhere in Canada, with a preference for candidates in Eastern Standard Time (EST).Join a dynamic team of experts specializing in blockchain technology, cryptography, and security, and take the lead in designing and scaling our backend infrastructure. In this pivotal role, you will not only write code but also define technical strategy and oversee critical projects from inception to deployment.Key Responsibilities:Lead the design and implementation of scalable, secure backend services and APIs.Architect and refine databases, microservices, and system integrations.Manage essential projects through their entire lifecycle, ensuring high performance and reliability.Diagnose and solve complex performance issues at scale.Enhance CI/CD processes and observability across teams.Collaborate closely with product and security teams to align technical execution with business objectives.Mentor and guide senior engineers, promoting best practices and high-level technical discussions.Make significant architectural decisions and uphold engineering standards throughout the organization.

About ClickHouseClickHouse, a proud member of the 2025 Forbes Cloud 100 list, stands out as one of the most pioneering and rapidly expanding private cloud enterprises. With over 3,000 clients and an astonishing annual recurring revenue growth of over 250% year-on-year, ClickHouse is at the forefront of real-time analytics, data warehousing, observability, and AI applications.The organization’s remarkable momentum was recently reinforced by a significant $400M Series D funding round. In just the last three months, notable clients such as Capital One, Lovable, Decagon, Polymarket, and Airwallex have either adopted our platform or expanded their existing usage. These additions complement an established base of AI trailblazers and global corporations, including Meta, Cursor, Sony, and Tesla.Join us on our mission to revolutionize how businesses leverage data. Be a part of our exciting journey!About the TeamThe ClickPipes Platform is essential for driving our company's growth and ensuring our clients achieve success by effortlessly onboarding and integrating data from various sources into ClickHouse. This role allows you to work at a petabyte scale in a high-velocity environment, offering an outstanding opportunity to tackle complex technical challenges, operate independently, and make a significant impact.Discover some of our team's recent achievements highlighted in our blog:Flexible Scaling and Monitoring in ClickPipesMySQL CDC Connector for ClickPipesThe Evolution of ClickPipesWe seek outstanding backend engineers proficient in diverse technologies, with substantial expertise in Kubernetes, distributed systems, cloud services, and platform reliability. As a team member, you'll collaborate across functions to construct and maintain the robust infrastructure that supports ClickPipes. This position is perfect for individuals who can work autonomously, take initiative, and propel projects forward with a high degree of independence.What will you do?Enhance and scale our high-performance data onboarding platform to effectively manage increasing data volumes.

Join Databricks, an innovative leader in data and AI, on our mission to simplify access to data and AI technologies. We are dedicated to transforming industries, from revolutionizing transportation to advancing medical breakthroughs, by providing the world's foremost data and AI infrastructure platform. Our engineering-driven culture fuels our relentless pursuit of solving technical challenges, whether it's enhancing the user experience with next-gen UI/UX or expanding our infrastructure to support millions of virtual machines.As we establish our new R&D center in Vancouver, we are on the lookout for exceptional engineers to help us democratize data and AI. This site is poised to become a cornerstone of product innovation at Databricks, with several strategic initiatives underway.The Vancouver team will focus on key areas, including:Log Analytics - Tackling the challenges of real-time petabyte-scale log analysis, encompassing the entire data processing pipeline from ingestion to user experience.AI/BI - Our AI/BI product is revolutionizing business intelligence with unmatched adoption rates, enabling rich dashboarding and advanced visualizations.Unity Catalog Business Semantics - Governing and managing enterprise data context through our innovative Unity Catalog, enhancing data modeling and AI enablement.Databricks Apps - Contributing to one of our fastest-growing products, with opportunities to work on low-level platform components and AI-driven app builder agents.

Join our dynamic team at Pigment as a Senior Backend Software Engineer. In this role, you will be instrumental in designing and implementing robust backend solutions that empower our innovative platform. You will collaborate with cross-functional teams to enhance system performance and scalability while ensuring a seamless user experience.

Bree serves Canadians who live paycheck to paycheck, focusing on those who need short-term credit solutions. With over 800,000 users, Bree has established a strong presence in the FinTech sector. The company maintains profitability, generates eight-figure annual revenue, and continues to see double-digit monthly growth. Bree has experienced zero voluntary employee turnover. After joining Y Combinator in 2021, Bree raised a $2 million seed round. Role overview The Software Engineer, Infrastructure will work to strengthen the reliability, scalability, and maintainability of Bree's data-driven systems. This position focuses on supporting a growing user base by improving system performance and stability. What you will do Design, build, and maintain infrastructure to support Bree's data systems. Refactor code and improve system architecture to reduce technical debt. Optimize PostgreSQL databases through query tuning, indexing, and capacity planning. Implement Infrastructure as Code using tools such as Pulumi, Terraform, or AWS CloudFormation. Set up monitoring and alerting with tools like Grafana or Datadog. Enhance system observability by improving metrics, logging, and tracing. Requirements Bachelor's degree in Computer Science or a related discipline. Experience building scalable, reliable, and maintainable infrastructure. Strong knowledge of PostgreSQL and hands-on database optimization skills. Familiarity with Infrastructure as Code concepts and tools. Experience with monitoring tools and practices. Location This position is based in Toronto.

Senior Backend Software EngineerABOUT USProcurify is a leading AI-driven procurement and accounts payable automation platform designed specifically for mid-market organizations. Our mission is to empower businesses to take control of their spending and achieve significant savings.We are seeking a strategic and insightful engineering leader to join our team and assist in the scaling of our platform, development methodologies, and engineering talent.ABOUT THE ROLEAs a Senior Backend Engineer, you will play a pivotal role on our foundational Platform team. This team is responsible for the essential services, APIs, and integration frameworks that connect Procurify with our clients' vital financial and HR systems.In this hands-on role, you will excel in developing robust and scalable integrations. You will lead the design and implementation of connections to key Accounting and ERP platforms, facilitating seamless data exchange and enabling powerful automated workflows for our clients. Your enthusiasm for API design, problem-solving in complex integration scenarios, and mentoring fellow engineers will be crucial in enhancing the team's capabilities.WHAT YOU’LL BE WORKING ON:Design & Build Core APIs: Take the lead in designing, developing, and maintaining our internal and external APIs, contributing significantly to our API-first strategy by utilizing modern Python frameworks like FastAPI.Build & Maintain Key Integrations: Serve as the go-to expert for our suite of third-party integrations, ensuring reliable connections to critical Accounting/ERP systems (e.g., QuickBooks Online, NetSuite, Microsoft Business Central).Enhance our Platform Architecture: Contribute to the long-term vision of our integration platform, designing and implementing scalable, observable, and resilient systems capable of managing high data volumes from numerous customers.Mentor & Grow Teammates: As a senior engineer, you'll provide technical mentorship to other team members, leading by example during code reviews and sharing your knowledge in technical design discussions.OUR TECH STACK:Backend: Python, Django, FastAPICloud: AWS

Join Mechanical Orchard, a pioneering company dedicated to transforming the most essential and complex business applications—the backbone of today's digital world. We specialize in modernizing these applications, ensuring they can swiftly adapt to market challenges and opportunities.Our innovative approach is born from years of observing the common pitfalls in modernization projects. We aim to mitigate risks and disruptions through our Generative AI platform, Imogen, which leverages cutting-edge data engineering, compiler, and LLM-based techniques to deliver unparalleled solutions in the industry.With a strong foundation in software development and a reputation for influencing the industry, we've contributed significantly to the evolution of Agile practices, including XP. We apply the same level of thoughtfulness and rigor in integrating AI where it brings real value. Our core values focus on doing the right thing, achieving effective outcomes, and fostering kindness within our teams.Together, we are bringing relief to overwhelmed IT teams and witnessing how our expertise and innovative technologies can radically enhance the way organizations operate and innovate. If you share our passion for excellence and collaboration, we welcome your application!

Join us at Mechanical Orchard as an Infrastructure Software Engineer, where you will play a crucial role in designing and implementing robust software solutions that enhance our infrastructure capabilities. You will work closely with cross-functional teams to ensure seamless integration and optimal performance of our systems.In this position, you will leverage your technical skills to troubleshoot and resolve complex software issues, while also contributing to the development of innovative solutions that drive our business forward.

Role overview Veeva Systems is hiring a Senior Software Engineer focused on infrastructure in Toronto, Canada. This role centers on designing and building software that supports and improves our cloud-based platforms. The work directly impacts scalability and performance across our systems. What you will do Design and implement software solutions for infrastructure needs Work closely with teams from different disciplines to strengthen our cloud platforms Contribute to projects that improve system scalability and performance

Join StackAdapt as a Backend Software Engineer, where you'll be at the forefront of technology. We are seeking a talented engineer to design, develop, and maintain our backend systems. Your expertise will play a critical role in helping us innovate and improve our platform.

Afresh Technologies is seeking a Senior Backend Software Engineer to join the team in Ontario, Canada. This role centers on building and maintaining backend systems that support greater efficiency in the food supply chain. The systems developed play a key part in smarter inventory management and ongoing efforts to cut down on food waste. Role overview This position involves designing backend solutions that can handle growing business demands. The work supports the company's mission to make food distribution smarter and more sustainable. What you will do Design and develop backend systems that scale alongside business requirements Collaborate with engineering, product, and data teams to deliver dependable applications Apply data-driven methods to improve inventory management Support projects aimed at reducing food waste across the supply chain

As a Senior Infrastructure Software Engineer at Afresh Technologies, you will play a crucial role in enhancing our infrastructure to support cutting-edge software solutions. You will collaborate with cross-functional teams to design, implement, and maintain scalable systems that improve our operational efficiency and reliability.

Role Overview Veeva Systems Inc. is looking for a Senior Software Engineer focused on Infrastructure in Toronto, Canada. This role centers on designing, building, and improving infrastructure that supports our software products. What You Will Do Create and refine infrastructure solutions to support application development and deployment Work with teams across engineering, operations, and product to strengthen system reliability and performance Address scalability and security needs as our technology evolves Impact Your work will help shape Veeva’s technology foundation and support the growth of our software applications.

About LeagueEstablished in 2014, League stands at the forefront of healthcare consumer experience (CX) platforms, leveraging artificial intelligence (AI) to connect with over 63 million individuals globally. Our innovative platform empowers payers, providers, and consumer health partners to create high-engagement healthcare solutions that lead to improved health outcomes. With over $285 million raised in venture capital, League enhances the digital experiences for renowned healthcare brands such as Highmark Health, Manulife, Medibank, and Shoppers Drug Mart.Position SummaryWe are looking for a talented Backend Software Engineer to join our dynamic Release Engineering team. This role focuses on Continuous Integration/Continuous Deployment (CI/CD) infrastructure, release automation, and developer tooling. You will play an essential role in enhancing the operational efficiency of our engineering organization’s delivery capabilities.Key Responsibilities:Oversee and execute software releases across diverse platforms including Web, Android, iOS, and CLIs.Design and maintain tools for release automation and bot functionalities.Manage release patch/hotfix requests while coordinating release schedules.Diagnose and resolve issues related to release automation, including rollback procedures.Utilize AI technologies to scale solutions and streamline existing processes.

About BreeBree is transforming the consumer finance landscape by providing innovative, efficient, and cost-effective financial services to over half the Canadian population living paycheck to paycheck. Operating within a vast yet underrepresented market, we aim to be the most affordable and reliable provider of short-term credit for the 20 million Canadians facing financial challenges.With over 600,000 Canadians already benefiting from Bree's services, we are just beginning our journey. Our company is experiencing rapid growth, achieving product-market fit, and is positioned to become a leading FinTech player in Canada. With annualized revenues in the eight-figure range, we are on a double-digit growth trajectory, maintaining profitability and an impressive employee retention rate. As a proud participant of Y Combinator in 2021, we successfully secured a $2 million seed funding shortly thereafter.About the RoleWe are seeking a talented Backend Software Engineer to lead the architectural development of our serverless infrastructure, utilizing the latest AI development tools. The ideal candidate will possess extensive backend experience, a dedication to creating clean and maintainable systems, and an innovative mindset towards AI-assisted development.What You'll DoArchitect and advance our serverless backend systems with an emphasis on scalability, maintainability, and enhancing the developer experience.Refactor and modernize our existing Lambda-based microservices architecture to implement patterns that optimize AI tool effectiveness.Create and maintain robust data pipelines and payment processing systems across various providers.Promote best practices in AI-native development, establishing patterns and abstractions that foster rapid iteration with tools such as Cursor and Claude Code.Collaborate with infrastructure engineers to refine our AWS-based architecture using Infrastructure as Code.Drive the consolidation and standardization of our data layer across Supabase, Firebase, and legacy systems.What You'll NeedExpert-level proficiency in TypeScript, Node.js, and AWS services.Demonstrated experience with serverless architectures and microservices.Strong understanding of database systems and data modeling.Familiarity with AI development tools and methodologies.Excellent problem-solving skills and a proactive approach to development challenges.

Join Us at HarveyAt Harvey, we are revolutionizing the landscape of legal and professional services. Our approach is not merely incremental; we are committed to a comprehensive transformation. By leveraging cutting-edge AI technologies, a robust enterprise platform, and profound expertise in the domain, we are redefining how critical knowledge work is executed for generations to come.This is an exceptional opportunity to contribute to a generational company at a pivotal moment in its growth. With over 1,000 clients across 58 countries, a strong product-market fit, and support from world-class investors, we are experiencing rapid growth and creating a new category in real-time. The challenges are ambitious, the standards are high, and the potential for personal, professional, and financial growth is unparalleled.Our team consists of sharp, motivated individuals who are deeply dedicated to our mission. We operate with urgency, take ownership of our challenges, and are committed to delivering impactful solutions — from initial concepts to long-term results. We maintain close relationships with our customers, from leadership to engineers, collaborating to address real problems with urgency and care. If you thrive in dynamic environments, strive for excellence, and wish to influence the future of work alongside high-achieving peers, we invite you to build with us.At Harvey, we are scripting the future of professional services today, and we are only just beginning.Role SummaryAs a Backend Software Engineer at Harvey, you will be instrumental in building the foundational infrastructure of our product platform, while also developing user-facing features for some of the world's leading law firms and enterprise clients. This team is responsible for the platform layer that ensures secure, reliable, and adaptable experiences for our customers, including notifications, permissions, and feature flag infrastructure. Additionally, we create enterprise-grade collaboration tools tailored for law firms.You will design systems that serve as critical infrastructure for the wider company, directly influencing how our users engage with Harvey's AI-driven legal tools. This position is perfect for engineers eager to oscillate between in-depth platform architecture and hands-on product development.This position is based in Toronto, Canada. We operate on a hybrid model, with a requirement of 3+ days in the office per week, and we offer relocation assistance to new hires.

Join Justworks as a Senior Backend Software Engineer and play a pivotal role in shaping our technology landscape. You will work on high-impact projects, designing and implementing scalable backend systems that support our mission of simplifying business operations for our clients. Your expertise in backend technologies will be critical in delivering exceptional digital experiences.

About Palmstreet:Palmstreet is the leading live shopping platform for rare plants, handcrafted items, and distinctive goods. Established in 2020 by veterans from Instagram and Apple, Palmstreet originally began as a plant identification app and has rapidly transformed into a pioneer in live shopping, initially catering to plant sellers. Driven by a vibrant community of plant enthusiasts, we have swiftly diversified into new categories to meet the needs of our expanding audience.Our aspiration is to become the “World’s Online Main Street,” blending the charm of traditional shopping with engaging, social online experiences. Supported by top-tier Silicon Valley venture capitalists and energized by a responsive and empathetic team, we have witnessed our GMV grow by 500 times over the past 18 months.As we continue to redefine the landscape of social commerce, we are on the lookout for talented individuals eager to grow alongside us and contribute to our mission.The Opportunity:We are seeking a Senior Backend Software Engineer to join our dynamic team. In this role, you will spearhead architectural decisions, enhance core user experiences such as instant bidding and live interactions, design scalable architectures capable of supporting millions of users, innovate essential features like live streaming and checkout processes, and ensure the reliability of our deployment pipeline.