Senior Backend Engineer

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.

Join our dynamic team at 1pertinentinc as a Senior Backend Engineer. In this pivotal role, you will be responsible for designing, developing, and maintaining our backend systems. You will collaborate closely with cross-functional teams to deliver high-quality software solutions that enhance user experiences.We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to tackle complex challenges. Your expertise in backend technologies will help us to scale our applications and improve system performance.

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.

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 our dynamic team at rockstar-3 as a Senior Backend Engineer specializing in Integrations & Platform. In this fully remote role, you will play a key role in developing robust backend solutions that integrate seamlessly with our platform. We are looking for an innovative engineer who thrives in a collaborative environment and is passionate about building high-quality, scalable services.

Join Our Team as a Senior Backend EngineerAt DualEntry, we're pioneering the future of finance with our innovative AI-driven ERP solutions. As a rapidly growing AI startup, we are revolutionizing the fintech landscape, valued at over $220 billion, by helping businesses transition from outdated on-premise systems.Our AI-native ERP empowers accounting teams to maximize efficiency, reducing manual data entry and streamlining workflows. From startups generating $5M in ARR to publicly traded companies, DualEntry is making the dream of a one-person finance team a reality.We're looking for a Senior Backend Engineer who thrives in a fast-paced environment and is ready to take ownership of projects, crafting features and systems that drive our mission forward.You will play a critical role in our engineering team, shaping our backend infrastructure and ensuring we remain at the forefront of the fintech revolution.

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.

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

NimbleRx is a pioneering healthtech company dedicated to transforming the way individuals access, understand, and manage their healthcare. Our journey begins with the ambition to create the world's most beloved pharmacy business. As a rapidly expanding, tech-centric startup, we are committed to enhancing the experiences of both patients and pharmacists. At Nimble, we cultivate a collaborative culture that encourages open communication and purposeful action, empowering us to tackle today's most exciting challenges and achieve rapid growth.* Please note: Sponsorship options are limited as Nimble does not have an entity established in Canada.As a Senior Backend Engineer, you will play a crucial role in designing the technology and customer experiences that are essential to our various web products serving patients, pharmacies, and other clients of NimbleRx (www.nimblerx.com). You will collaborate with a team of exceptional and driven software engineers who prioritize performance, reliability, and scalability in their work. Your contributions will involve close cooperation with other developers, product management, and design teams to define feature requirements and technical use cases, ensuring timely delivery of high-quality code.Our engineering culture: We embrace a philosophy of shared trust and humility, fostering a sense of unity as we collaboratively navigate the challenges of a fast-growing business. Our daily operations reflect our core values of empathy, simplicity, autonomy, leadership, ownership, curiosity, a bias for action, and mentorship, all within a highly cooperative environment.

About FeatheryFeathery revolutionizes data intake workflows for insurance and wealth management firms. Industry leaders depend on Feathery to streamline crucial operations such as underwriting, client onboarding, and automated account openings.With significant revenue growth and increasing demand from enterprises, we are expanding our engineering team to handle progressively intricate, data-driven workflows across our platform.Why We’re HiringAs Feathery continues to grow, so does the complexity and scale of the systems that support our product—ranging from document processing pipelines to real-time workflow execution.We are seeking a Senior Backend Engineer to assist in constructing and scaling the foundational infrastructure behind our document intelligence and workflow platform. This role is perfect for someone who enjoys designing reliable, high-performance systems and taking charge of backend architecture in a rapidly growing B2B SaaS environment.You will collaborate closely with product, engineering, and customer-facing teams to deliver systems that are swift, resilient, and finely tuned to customer requirements.About the RoleThis is a high-ownership role that encompasses:Backend system design and distributed architectureInfrastructure, scalability, and performance optimizationProduct-focused engineering and problem-solvingCross-functional collaboration across product and customer teamsYou will play a pivotal role in shaping the systems that drive Feathery’s platform—ensuring they are reliable, scalable, and capable of managing complex, real-world applications.What You’ll DoBackend Systems & InfrastructureDesign, build, and scale backend services that facilitate document processing and workflow automationDevelop asynchronous pipelines and distributed systems for managing large data volumesConstruct and maintain infrastructure utilizing AWS services and queuing systems (e.g., SQS)Guarantee high availability, fault tolerance, and observability across systemsOptimize systems for performance, scalability, and cost-efficiencyData Processing & Platform CapabilitiesEstablish systems for processing and transforming both structured and unstructured dataIntegrate data sources and ensure seamless data flow

About Equitable Bank Equitable Bank, recognized as Canada's Challenger Bank™, serves over 800,000 customers nationwide. With more than $142 billion in assets under management and a wholly owned subsidiary (Concentra Bank) supporting credit unions and their six million members, the organization has spent 50 years pushing for change in Canadian banking. The EQ Bank digital platform has earned recognition from Forbes as one of the top banks in Canada since 2021. Role Overview: Senior Backend Engineer Based in Toronto, the Senior Backend Engineer will join the Fraud Engineering team at EQ Bank. This group builds and maintains the infrastructure that protects customer interactions, including onboarding, transactions, account changes, and fund transfers. The focus is on developing transparent, reliable, and responsible systems that keep customers safe without sacrificing agility. What You Will Do Design, build, and maintain backend services that support fraud prevention and detection across the bank's digital platforms. Take full ownership of services, from initial design through deployment and ongoing support. Develop systems that are observable and explainable in runtime, making it easier to monitor and understand behavior. Implement clear service ownership and well-defined, testable contracts between systems. Ensure new protections are introduced in a safe and predictable way, especially as system complexity grows. What We Value Curiosity about system behavior, especially in risk, failure, and edge-case scenarios. Commitment to building reliable and transparent backend solutions. Comfort with taking end-to-end responsibility for services. Desire to work in a team that challenges traditional banking norms and seeks creative solutions. Location This position is based in Toronto.

About the RoleWe are seeking two highly skilled backend engineers to become integral members of our dynamic team in Montreal and Berlin. In this role, you will be instrumental in enhancing our technological capabilities by significantly improving our core backend functionalities, thereby enabling other teams to efficiently utilize this backend.If you are enthusiastic about creating exceptional products, thrive in a fast-paced environment, and are eager to contribute to the growth of an ambitious startup, then this opportunity is tailor-made for you.Our Technology Stack:Python / FastAPIPostgreSQL / MongoDB / ElasticCloud LLM providers + bare metal GPUsGoogle Cloud Platform (GCP)Joining us as an early team member means assuming significant responsibilities from the outset, with the chance to influence our foundational technological stack and infrastructure.As part of one of the most forward-thinking AI companies today, you will collaborate with a talented team of colleagues who are leaders in their respective domains, creating an incredibly stimulating work environment. Your ResponsibilitiesOwn the delivery of complex projects, collaborating with cross-functional teams to ensure the timely completion of mission-critical components.Gain a comprehensive understanding of Reliant's overarching vision and incorporate this into your architectural and process decisions.Provide insightful feedback to refine UI/UX concepts and assist in planning backend and infrastructure enhancements.Take proactive steps to maintain long-term code quality and architectural integrity. QualificationsWe are looking for a candidate with a proven track record in backend or full-stack development, with a focus on rapid innovation and effective systems design to facilitate scalability for both opportunities and team growth.You will excel in this position if you possess the following skills and experiences:5+ years of demonstrable experience in building backend services or distributed systems.Experience in designing, building, testing, and maintaining backend services and APIs that support product features, including the ability to write robust, production-quality code.Engage in system and service design; contribute to architectural discussions and make informed decisions regarding scalability, latency, cost, and reliability.Ability to navigate ambiguity and translate high-level requirements into actionable implementation plans.Collaborate with cross-functional partners including product management, frontend, UX, data, and operations to define requirements, plan implementations, and deliver features.Ensure code quality through writing, reviewing, and enhancing unit/integration tests.

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.

About BetrFounded in 2022 by Joey Levy and Jake Paul, Betr has created the world's first real money gaming super app. In September 2023, we launched Betr Picks, which quickly ascended to become one of the top fantasy sports pick 'em products in the U.S., now available in 34 states. By September 2025, we introduced Betr Social Sportsbook and Betr Arcade, with the former being one of the industry's fastest-growing products, currently operational in 32 states. Betr Arcade has rapidly established itself as a leading skills-based gaming platform and is live in 38 states. Our upcoming Betr Social Casino, soft-launched in February 2026, will soon be available in 28 states, alongside our prediction markets launching in 2026. With a community of one million paying users, Betr is recognized as one of the fastest-growing companies within the industry.We also take pride in being the most followed sports gaming company globally on social media, with 24/7 original content produced by Betr Media, our in-house media division.Betr is supported by prestigious investors including Fuel Venture Capital, Aliya Capital Partners, IA Sports Ventures, FinSight Ventures, Florida Funders, Harmony Partners, 8vc, and others.About the Role:We are in search of a Senior Backend Engineer to join our Integration Team at Betr, a dynamic and rapidly expanding sports betting and daily fantasy sports enterprise. This pivotal team serves as the backbone of our platform—ingesting odds feeds from various providers, managing essential data pipelines, and ensuring flawless integration across all system components.From your first day, you will take ownership of significant technical domains, work with advanced sports betting technologies, and tackle intricate challenges related to distributed systems at scale.This role is fully remote, but candidates must reside in Canada and possess legal authorization to work in the country.

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 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.

ABOUT USAt Xsolla, we are a leading global commerce company dedicated to providing innovative tools and services that empower game developers to tackle the unique challenges of the gaming industry. From indie projects to AAA titles, we partner with developers to support them in funding, distributing, marketing, and monetizing their games. Our commitment to the future of gaming drives us to create new opportunities and resources for creators. Headquartered in Los Angeles, California, we proudly serve over 1,500 game developers worldwide, helping them expand their audience and grow their businesses. With a focus on profitability and success, we equip developers with everything they need to thrive in the gaming landscape.For more details, visit xsolla.com.ABOUT YOUWe are seeking a Senior Backend Engineer who is meticulous, proactive, and collaborative to be a vital part of our Engineering team. The ideal candidate will thrive in a fast-paced and dynamic environment, eager to design and develop scalable backend systems, enhance architectural frameworks, and provide resilient, high-performance services for production.To succeed in this role, you must possess strong technical skills in Go, distributed systems, and microservices architecture, along with experience in developing and managing cloud-native applications in containerized settings using Docker and Kubernetes. Your ability to diagnose complex production issues, optimize system performance, and manage event-driven architectures utilizing Kafka or similar platforms will be crucial.If you are passionate about building dependable, scalable systems that support impactful products and enjoy creating seamless infrastructures that facilitate innovative payment, gaming, or commerce experiences, we would love to connect with you!

About ClickHouseFeatured on the 2025 Forbes Cloud 100 list, ClickHouse stands as a leader in innovation and growth within the private cloud sector. Boasting over 3,000 clients and an impressive annual recurring revenue (ARR) growth exceeding 250% year-on-year, ClickHouse excels in real-time analytics, data warehousing, observability, and AI workloads.The company recently validated its rapid growth trajectory with a $400M Series D funding round. In just the last three months, notable clients such as Capital One, Lovable, Decagon, Polymarket, and Airwallex have adopted or expanded their use of our platform. They join a distinguished roster of AI pioneers and global brands, including Meta, Cursor, Sony, and Tesla.Join us as we redefine the way organizations leverage data!We are seeking a Senior Backend Engineer to contribute to building a petabyte-scale, high-performance observability platform that prioritizes an exceptional developer experience (the DX in HyperDX). HyperDX is an open-source solution that converts telemetry data into actionable insights, creating a seamless integration of logs, metrics, traces, and session replays for faster root cause identification. If you’ve ever faced frustrations with Grafana, Datadog, or Elastic, you'll understand the significance of the challenges we are addressing, and you can play a pivotal role in solving them.Join us in transforming observability for developers!

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).

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.