Senior Backend Software Engineer - Streaming Infrastructure

Role overview This Senior Backend Software Engineer position at Affirm focuses on continuous delivery for financial technology products. The role centers on building and maintaining backend systems that directly impact the user experience. The work involves designing scalable solutions that support Affirm's offerings. What you will do Develop and improve backend systems with a focus on reliability and scalability Collaborate with engineering, product, and design teams to deliver new features Use continuous delivery practices to streamline deployment and strengthen system stability Offer ideas and solutions that align with business objectives Location This is a remote role open to candidates based in Canada.

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

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

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.

Role Overview Venn is hiring a Senior Backend Engineer in Toronto. This role focuses on designing and improving backend architecture to support reliable, scalable applications. The position involves close collaboration with colleagues from various teams to deliver solid software that supports business goals.

About UsCommon Room is the leading AI Go-To-Market (GTM) Platform that equips your teams with intelligent AI agents powered by comprehensive buyer insights. We consolidate every signal throughout the buyer journey into a continuously-updated, person-level perspective. This empowers your team to identify the right targets, craft personalized messages, and time their outreach effectively.In a world where GTM teams are overwhelmed by tool sprawl, fragmented data, and ineffective AI, Common Room simplifies the landscape with a unified platform designed for scalability and complexity. Our solution integrates data, orchestration, and execution into a single system, perfectly suited for organizations of 75 to over 1000 employees.Having secured over $50 million in funding from prestigious investors like Greylock, Index, and Madrona, we are also supported by more than 25 industry operators from leading companies such as Figma, Stripe, Airtable, Slack, Notion, Loom, and others.Your Impact at Common RoomWe seek individuals who are quick learners and possess a strong grasp of our product, business, and technology. You will thrive on growth and independence while owning and executing significant features. Your expertise in building APIs will help fellow engineers address customer challenges effectively, all while ensuring our systems remain efficient, scalable, and reliable. You will play a key role in advancing Common Room’s core internal capabilities, infrastructure, and systems, often staying a step ahead to meet customer needs.Additionally, you will engage in vital company-building initiatives that are essential for our fast-growing startup.Ideal Team Member6+ years of experience in software engineering.You are self-sufficient yet value collaboration and support from colleagues.Passionate about your craft and eager to manage substantial backend projects.Ability to work effectively with a diverse team of experienced engineers, including front-end developers.Sound judgment regarding trade-offs and tools necessary for problem-solving, preferring stable, well-supported technologies over trendy options.Design systems that address customer issues and find satisfaction in creating simple, elegant solutions.

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 complex documents into actionable insights, equipping global deal teams with the knowledge needed to negotiate effectively.We foster a diverse team of attorneys, financial experts, and engineers within a hybrid, cross-cultural environment. Our mission is supported by esteemed enterprise AI investors, including GTMfund and industry veterans such as Jeremy Kranz and Andy Appelbaum.We thrive on complexity as it breeds innovation. If you're a proactive builder who excels in ambiguous situations and embraces radical ownership, we want to connect with you!For more details, visit centari.com or follow us on LinkedIn.

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 Affirm as a Senior Backend Software Engineer specializing in Merchant Advocacy. You will be responsible for designing, developing, and maintaining robust backend systems that support our merchant partners. Collaborate with cross-functional teams to implement solutions that enhance merchant experiences and ensure seamless integration of our payment solutions.

Join Affirm's dynamic Consumer Engineering team as a Senior Backend Software Engineer. In this remote role, you will play a pivotal part in designing and implementing scalable backend services that enhance user experience and drive business growth. Collaborate with cross-functional teams to deliver high-quality solutions and take ownership of significant projects that impact our customers.

Join Flagler Health, an innovative healthtech company dedicated to revolutionizing healthcare delivery through cutting-edge AI-driven workflow automation, enhanced remote patient engagement, and comprehensive chronic care programs. Our platform, already trusted by more than 1.5 million patients, is reshaping the efficiency and cost-effectiveness of care in the $4.5 trillion U.S. healthcare market, and with our unique freemium model, we're set to expand significantly.Key ResponsibilitiesArchitect, develop, and sustain robust backend services and web applications.Engage in the development of real-time web applications for audio and SMS communications with patients.Create and manage fault-tolerant, scalable workflows for asynchronous background processing.Collaborate effectively with frontend, product management, and infrastructure teams to ensure the delivery of reliable, compliant systems.Required QualificationsDemonstrated experience in building high-availability backend applications within regulated sectors (e.g., healthcare, finance).Strong proficiency in TypeScript and/or Python for backend service development.Experience with backend APIs utilizing Node.js, Express, Mongoose, Twilio or similar technologies.Familiarity with distributed workflow orchestration systems such as Temporal, Cadence, AWS Step Functions, or Conductor.Solid grasp of distributed systems principles, including retries, idempotency, and robust failure handling.Preferred QualificationsExperience within the healthcare technology or SaaS sectors at a mid-sized startup.Understanding of HL7, FHIR, or EHR integration processes.Familiarity with cloud services such as AWS, Azure, or GCP.Hands-on experience with CI/CD pipelines, infrastructure automation, and version control systems (e.g., Git).Experience in a monorepo environment (e.g., Turborepo, Nx).

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.

About Us:At Atolio, we pride ourselves on being a fully remote and well-funded startup, founded by industry veterans from Splunk and PagerDuty. Our mission is to revolutionize access to organizational knowledge, making it instantly available across various applications, services, and platforms. As an early-series startup, we leverage advanced machine learning and AI to tackle some of the most intricate challenges in enterprise search, including indexing, retrieval, and multi-cloud scaling (AWS, GCP, Azure). Our collaborative culture, state-of-the-art tools, and extensive benefits create an environment where innovation and creativity flourish.About the Role:In the capacity of a Senior Backend Engineer, you will be instrumental in developing distributed backend services deployed in Kubernetes across AWS, GCP, or Azure, facilitating enterprise-grade applications integrated with services like Okta. You will also be responsible for constructing scalable, cloud-native systems using Golang. This role is perfect for those who excel in dynamic, uncertain environments, enjoy tackling intricate infrastructure and systems challenges, and possess excellent communication skills in a fully remote setting.Your Responsibilities Will Include:Designing, building, and maintaining high-performance, cloud-native backend services using Golang within a modern microservices architecture.Utilizing a profound understanding of computer science principles, including algorithms, data structures, operating systems, and distributed systems to address complex, real-world challenges.Deploying and managing services in Kubernetes across AWS, GCP, or Azure, with an emphasis on reliability, observability, and performance.Integrating with enterprise systems and security protocols, including SSO/IdP providers like Okta, to facilitate large-scale deployments.Leading projects from inception to execution.Overseeing the architecture and design of new product features and services.Collaborating across teams to define technical requirements, design architecture, and deliver impactful solutions in a fast-paced startup environment.Working across the stack as needed, particularly at the intersection of backend services and other infrastructure layers.What We Seek:A solid grasp of core computer science principles, including algorithms, data structures, operating systems, distributed systems, networking, and concurrent programming.5+ years of experience in designing, implementing, and maintaining highly scalable cloud-native applications.

Join Kepler as a Senior Backend Software Developer and contribute to innovative software solutions that drive our mission forward. In this role, you will collaborate with cross-functional teams to design and implement robust backend systems. Your expertise will be crucial in optimizing performance, enhancing scalability, and ensuring security in our applications.

At Affirm, we are transforming the credit landscape to make it transparent and consumer-friendly, allowing individuals to buy now and pay later without any hidden fees or compound interest.The Partner Merchant Interface (PMI) team is responsible for developing the APIs and solutions that drive Affirm’s partnerships with enterprise merchants. Our team designs and manages the APIs and tools that facilitate seamless checkout experiences and merchant onboarding, working closely with stakeholders to craft tailored end-to-end integrated solutions.

Cresta is dedicated to transforming customer interactions into a strategic advantage by harnessing the full potential of contact centers. Our innovative platform integrates advanced AI technologies with human intelligence to reveal customer insights, streamline conversations, and enhance operational efficiency, allowing teams to work more effectively. Founded by Sebastian Thrun, a visionary from the Stanford AI lab and the mind behind Google X and Waymo, our leadership team also features CEO Ping Wu, a co-founder of Google Contact Center AI, and Tim Shi, an early member of OpenAI. Join us on an exciting journey to redefine the future of work through AI innovation. The revolution begins at Cresta. About the Role: The AI Agent team at Cresta is committed to developing leading-edge AI Agents that tackle real-world challenges for our clients. We focus on utilizing the latest advancements in Large Language Models (LLMs) and AI Agent systems while ensuring our solutions are secure, cost-effective, and dependable. This role offers hands-on involvement with pioneering projects, requiring innovative software engineers who can translate research into scalable, practical applications. As a Senior Software Engineer, your mission will be to ensure our AI Agents are powered by dependable and scalable server solutions. This encompasses designing and maintaining server architecture capable of managing high-volume interactions while guaranteeing optimal performance and availability. While our emphasis is on server optimization and data management rather than pure research, you will engage with cutting-edge technologies in the cloud and server domains. This is a rare opportunity to influence the AI landscape at Cresta by addressing complex challenges and implementing groundbreaking advancements in production settings.

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.

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.

Remote builds tools that help organizations manage global employment compliance, hiring, and payments. The company operates with a fully remote team spanning nearly every continent, emphasizing asynchronous collaboration and valuing a mix of backgrounds and experiences. Automation and AI are part of every role, supporting the mission to create a leading HR platform for international work. Role overview The Senior Backend Engineer joins a cross-functional squad, working alongside frontend, backend, SRE, and QA engineers. Each squad focuses on a specific product area, with team assignments determined during the interview process to align with both business needs and individual interests. This position centers on developing tools, APIs, and integrations for one of Remote’s products. The backend stack uses Elixir and Phoenix, with data in Postgres. The frontend stack includes React and Next.js. GitLab manages version control and CI/CD, and applications run on AWS. Continuous integration supports multiple daily deployments. For more insight into engineering practices, see the Engineering Rulebook. What this job offers Challenging work supporting global operations for individuals and businesses A chance to make a significant impact early in the company’s growth Benefits designed for career development and well-being Location This is a fully remote position open to candidates based in Canada.

About MegaportAt Megaport, we redefine the technology landscape. As the global frontrunner in Network as a Service (NaaS), we have revolutionized how businesses connect with cloud services, data centers, and each other. Proudly listed on the Australian Stock Exchange, we partner with renowned tech giants such as Amazon, Microsoft, Google, Oracle, and IBM. With our headquarters in Brisbane and a diverse team of over 400 professionals across Asia-Pacific, Europe, and the Americas, we foster a collaborative, supportive, and genuinely enjoyable work environment.Our Team CultureOur team consists of innovative problem solvers, creative thinkers, and dedicated engineers who are passionate about technology. Here, culture is not merely a decorative poster; it is an ethos where collaboration supersedes hierarchy, curiosity drives our progress, and every voice is valued. While we take our goals seriously, we manage to keep a light-hearted spirit. Our global vision requires seamless teamwork across time zones, and we trust our colleagues to deliver outstanding results without compromising our core values. Most importantly, our customers are at the heart of everything we do.We are dedicated to enhancing diversity in the tech industry and encourage applicants from all walks of life. If you’re enthusiastic about this opportunity, we urge you to apply, even if you don't meet every requirement.Your RoleAs a Senior Backend Software Engineer, you will be a respected leader within our engineering team. Your passion lies in creating products that delight customers. You will take full ownership of your work, adeptly managing technical debt while enhancing user experience and adding innovative features. You will thrive in an environment that embraces cutting-edge technology and offers a platform to share your expertise among like-minded individuals in a no-ego team. Join us at Megaport, where technology is at our core and where we work in an exciting domain.