Senior Staff Software Developer, Backend Platform

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.

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.

At Hive, we are a dynamic SaaS company revolutionizing marketing solutions for live event promoters across North America. Our engineering team is dedicated to developing and maintaining innovative systems that enable our clients to achieve extraordinary results with ease. We pride ourselves on our agile approach, consistently delivering minimum viable products, deploying multiple times a day, and quickly adapting to customer feedback.We tackle significant technical challenges, processing high volumes of real-time data from over 20 integrations (including Ticketmaster and Eventbrite), managing billions of customer data points, and sending more than 200 million emails and SMS messages monthly on behalf of our clients. Our platform is entirely hosted on AWS, utilizing a robust backend technology stack that includes Python, Django, MySQL, MongoDB, Elasticsearch, Clickhouse, Redis, and various AWS services.We are currently looking for a Senior Backend Software Development Engineer to join our team and address complex challenges while enhancing our customers' experiences at scale.

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.

At TextNow, we believe that communication should be accessible to everyone. We are pioneering a new way for individuals to connect, merging simplicity, intelligence, and affordability. Our team is composed of innovative builders who leverage technology to empower millions of users with cost-effective communication solutions every day.As a Backend Software Developer, your role will extend beyond mere service creation; you will be instrumental in shaping the systems, architecture, and tooling that underpin our services. Our Technical Staff members are expected to blend leadership with hands-on coding to maximize opportunities for impact. The ability to think strategically while also engaging with intricate details is essential. You will take technical ownership of pivotal backend domains and collaborate across mobile, web, and data to develop systems that are faster, smarter, and more reliable.AI and automation are integral to our development processes. You'll utilize these technologies to expedite development, enhance performance, swiftly identify and resolve issues, and continuously elevate the standard for backend development excellence.We are seeking Technical Staff members at various levels (intermediate/senior/staff+). Whether you're a seasoned developer ready to lead complex systems or an early-career developer eager to advance, we will tailor your title and responsibilities according to your experience and impact.This position promises to create significant impact at scale. You will influence how TextNow constructs and manages its backend systems, employing AI and automation to streamline development, enhance decision-making, and provide seamless experiences for millions of users globally.

Role Overview Robinhood Markets, Inc. is seeking a Backend Software Developer in Toronto, Canada. This role focuses on building and improving backend systems that support the trading platform. What You Will Do Design and implement backend systems for the trading platform Work with teams across engineering, product, and design to add and refine features Optimize system performance and support scalability as the platform grows

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 our dynamic team as a Senior .NET Designer/Developer specializing in backend systems. This role offers a 12-month contract based in the vibrant city of Montréal.In this position, you will engage in the complete Software Development Life Cycle (SDLC) for web applications. You will have the opportunity to expand your knowledge in cutting-edge technologies, including Cloud computing, RFID, Bluetooth, and WiFi, as we transition existing systems to next-generation product lines.Your responsibilities will include collaborating with internal and external users to assess design requirements, processing capabilities, user access levels, and the necessary software, firmware, and hardware components. You will conduct detailed analyses of system designs, creating sequential and logic diagrams based on system requirements or user stories.

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 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).

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.

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.

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.

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.

Jobgether is hiring for a partner company, seeking a Senior Node.js Backend Developer based in Canada. This remote-first role focuses on building and maintaining backend systems that power digital financial solutions used around the globe. Key Responsibilities Design and shape the core platform architecture to deliver scalable and secure backend services Optimize API performance and strengthen infrastructure resilience Contribute to new product features and drive technical innovation Work with real-time systems, microservices, and distributed applications Collaborate with engineers across different regions Take ownership of projects and help guide technical decisions Requirements Extensive experience as a backend developer with deep Node.js expertise Proven track record building secure, scalable, and highly available backend services Comfortable navigating evolving environments and tackling complex technical challenges Located in Canada Team and Work Style The engineering team is distributed and remote, bringing together skilled engineers from multiple regions. The culture values autonomy, ownership, and collaboration to deliver meaningful solutions.

About Range Group Range Group supports professional travel advisors with technology and 24/7 support. The company manages $4.5 billion in annual travel sales and believes travel advisors make every trip better. Range Group also dedicates 10% of group profits to social impact through the Range Foundation, funding exploration, education, cultural projects, and crisis support worldwide. Location and Work Arrangement This role is based in Canada. For those near Toronto, the position is hybrid with two days each week at the office (2 Queen St. E). Candidates outside commuting distance may work from home. Role Overview The Senior Software Developer (Backend or Full-stack) joins a team focused on TripArc's ADX platform. This booking tool supports thousands of travel advisors across North America. While another team builds the next-generation platform, this pod keeps existing features evolving, making them faster, more reliable, and better aligned with user needs. This position suits a senior developer who enjoys backend challenges. Work changes from sprint to sprint: one cycle might refine payment flows, another could improve always-on service, and the next might focus on optimizing performance under heavy usage. The scope is broad, and priorities shift as needs arise. What You Will Do Enhance and maintain features on the ADX platform used daily by travel advisors Investigate issues, propose solutions, and scope tasks with Product and QA teams Deliver code that goes directly into production Work without waiting for detailed specifications, take initiative to solve problems See the direct impact of your work in how advisors use the platform How the Team Works Developers at Range Group use AI coding tools such as GitHub Copilot, Claude, or Cursor as a regular part of their workflow. These tools help speed up development and improve code quality, alongside thorough code review and testing. Experience with AI-assisted development is important for success in this role. Who Should Apply Senior developers with strong backend or full-stack experience Those comfortable with changing priorities and varied technical challenges People who work well with minimal direction and enjoy collaborating across teams Developers who have mastered AI-assisted coding tools