Senior Full Stack Software Engineer

About Us: Established in 2001, Vivid Seats (NASDAQ: SEAT) is a premier online ticket marketplace dedicated to connecting fans with the live events, artists, and teams they cherish. We hold a strong belief in the power of experiences, and we are deeply committed to developing products that foster human connections. Recognized as one of Built In's top workplaces in 2025, we consider our people to be our greatest asset. To nurture our talent, we have cultivated a company culture that empowers employees to tackle challenges, promotes collaboration, and continually evolves by harnessing data and inspiring innovation.We are passionate about leveraging cutting-edge technology to enhance performance and unlock creativity. As part of our innovative culture, we actively incorporate AI tools to improve decision-making, streamline workflows, and deliver superior outcomes for our customers.

Location: US or CanadaType: US Applicants - Full-Time; Canadian Applicants - Independent Contractor About Human Agency At Human Agency, we are on an exciting journey of rapid growth, seeking outstanding talent in various disciplines to join our innovative team. Our mission is to attract exceptional individuals—from creative visionaries to technical specialists—who can help us navigate this pivotal phase of our development. We pride ourselves on being a team of doers. Leadership is hands-on, collaboration is key, and every team member plays a crucial role in our outcomes. We foster an environment where feedback is welcomed, learning is swift, and excellence is the goal. Here, the merit of an idea takes precedence over titles, as we strive to meet our clients' expectations and deliver remarkable results every time. Our clients’ missions and products are of utmost importance to us. We immerse ourselves in their goals, acting as dedicated partners in addressing significant challenges. Each product we develop, strategy we devise, or asset we create is designed to be both aesthetically pleasing and functional—tailored for real-world impact. Humans are our most vital asset, and we are committed to hiring individuals who drive us forward. Across all areas—strategy, engineering, design, data, and operations—we search for teammates who elevate our standards and contribute to our growth. Our hiring philosophy is simple: always hire those who inspire us. We collaborate with organizations of all sizes to explore, design, and implement AI strategies that are secure, scalable, and centered around human needs. Our belief is that AI should enhance human capabilities, not replace them; we build with this conviction at the forefront of every engagement. From advisory services to practical implementation and training, we partner with clients to integrate AI in ways that align with their values and objectives, enabling teams to work smarter and unlock new possibilities through innovative solutions. Throughout our journey, we lead with purpose, passion, and a sense of adventure. We engage in meaningful work alongside people who inspire us, making the process a rewarding experience. At Human Agency, our identity and our work ethic are intricately linked. The Opportunity Join us at Human Agency as we shape the future by merging advanced AI technologies with exceptional software development. We specialize in creating scalable, secure SaaS applications that empower enterprise clients to tackle complex challenges efficiently. In this role as a Senior Full-Stack Engineer, you will spearhead development initiatives on high-impact projects at the intersection of AI, machine learning, and secure software engineering.

At Citylitics, we provide cutting-edge predictive intelligence that informs where, how, and why infrastructure investments will be made across North America. Our focus on infrastructure encompasses essential services such as water, transportation, transit, roads and highways, broadband, and power systems. This multi-trillion-dollar market represents a significant megatrend that will continue for over 20 years in North America.We transform vast amounts of data from over 40,000 cities, utilities, and public agencies into real-time market signals and invaluable sales intelligence. Our platform empowers leading infrastructure vendors, engineering firms, and construction companies to identify and strategically position themselves for major infrastructure opportunities well in advance, enabling them to cultivate relationships, prioritize projects, and influence project scopes before they reach formal procurement stages.Utilizing a sophisticated network of AI agents, finely-tuned models, and our proprietary infrastructure signals graph, combined with daily human-in-the-loop quality assurance processes, we deliver highly nuanced and reliable sales intelligence. Our platform seamlessly integrates with CRMs, ERPs, and data lakes, embedding actionable insights directly into sales workflows so teams can effectively prioritize their pursuits and strengthen their pipelines.Our mission is to enhance the decision-making process surrounding infrastructure investments, ensuring that critical needs are addressed sooner and that communities benefit from more resilient infrastructure. Join Citylitics and contribute to an industry that will have lasting significance while helping to grow a company that stands at the forefront of applied AI. We operate with a results-driven mindset and a commitment to excellence in a collaborative environment where teamwork is key to overcoming challenges and celebrating successes together.This position offers a hybrid work model based out of our Toronto office.

StackAdapt builds technology that helps marketers reach their audiences more effectively. The StackAdapt Marketing Platform uses AI to run hundreds of billions of optimizations every second, connecting brand and performance marketing for measurable results. Marketers rely on StackAdapt to manage campaigns across a range of programmatic advertising and marketing channels. About the Engineering Team Engineers at StackAdapt develop and maintain a modern MarTech platform, writing production-ready code that directly shapes the product. The team works with large data sets and uses technologies such as Ruby on Rails, React, and GraphQL. Collaboration and cross-functional teamwork are central, and StackAdapt supports growth with clear paths for career development. The company offers a flexible, inclusive culture. About the Orchestration Flows Team The Orchestration Flows group is building a new platform to help marketers launch and coordinate campaigns across programmatic channels. As StackAdapt expands from AdTech into broader marketing technology, this team plays a key role in scaling the business. Senior engineers here help shape the future of the platform. This is a Remote First position open to candidates anywhere in Canada, including Calgary, Toronto, and Vancouver. What You Will Do Design, improve, and troubleshoot distributed systems, managing backend dependencies with other teams to deliver new features on schedule. Lead code reviews, draft technical specs, and contribute to architectural planning for fast, high-quality releases. Develop and maintain the React-based frontend for Orchestration Flows, handling complex state and branching logic to support a strong customer experience. Build scalable systems and APIs with Ruby on Rails and GraphQL, laying the groundwork for new product features. Write modular, test-driven code and own projects from design through to production deployment. Spot and resolve bottlenecks that impact user adoption and product efficiency. Mentor teammates and contribute to a collaborative, enjoyable team culture.

At XYZ Storage, we redefine the storage experience. With a legacy spanning 28 years, we've crafted a unique and iconic brand that resonates with our customers, offering them peace of mind during what can often be a stressful time. Our mission is to simplify moving and storage, making it accessible and secure for everyone.We are excited to invite a talented Senior Full Stack Engineer to join our dynamic team. This role will allow you to contribute to impactful systems that support a rapidly expanding platform, serving tens of thousands of customers.Compensation:$120,000 - $150,000 annuallyExtra Perks:Comprehensive Benefits ProgramFunding for Educational CoursesGenerous Paid Personal DaysAnnual Performance BonusMilestone Recognition AwardsRRSP Program with Matching ContributionsMentoring and Career Development OpportunitiesPaid Training ProgramsSpecial Birthday RecognitionOur team at XYZ Storage is comprised of passionate professionals dedicated to providing seamless storage solutions while supporting our customers through critical life transitions. We cultivate a collaborative and innovative atmosphere, encouraging team members to grow, tackle challenges, and share valuable insights. Together, we are committed to: Delivering an unparalleled storage experience for our customers.As a Senior Full Stack Engineer, you will be instrumental in developing and maintaining the systems that drive our digital platform and enhance the customer experience.About You:You are a seasoned engineer who thrives on solving intricate technical problems and building scalable, reliable systems. Your pride in writing clean, production-ready code is matched only by your commitment to maintaining systems that support vital business operations.You excel in backend services, APIs, and infrastructure, and enjoy collaborating with both technical and non-technical teams to transform innovative ideas into actionable solutions.

At ZoomInfo, we are where careers take off. We thrive in a fast-paced environment that encourages bold thinking and empowers you to deliver your best work. Join a team that values deep connections, challenges conventional thinking, and celebrates achievements together. With cutting-edge tools that enhance your impact and a culture that supports your aspirations, you will not only contribute—you will drive results swiftly.As a Senior Full Stack Engineer on the Chorus Engagement team, you will play a pivotal role in Chorus.ai, our renowned Conversation Intelligence platform. Chorus processes and analyzes a vast array of sales calls, providing insights that empower sales professionals to excel and compete at the highest levels. You will oversee customer-facing product areas ranging from AI-enhanced tools to advanced data visualizations, architecting solutions capable of managing millions of customer requests daily.Whether your strengths lie in frontend or backend development, your expertise and willingness to learn will find ample opportunity here. You will collaborate with exceptionally talented engineers who will inspire you to reach new heights, all while pursuing ambitious goals that truly make a difference.

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

Findem is looking for a Senior Staff Full Stack Engineer based in Toronto or working remotely. This role centers on building and improving the company’s platform through hands-on development and close collaboration with colleagues from different disciplines. Role overview This position involves designing, developing, and refining features that support Findem’s products. The Senior Staff Full Stack Engineer will work with cross-functional teams to deliver solutions that drive the platform forward. What you will do Develop and enhance platform features using full stack technologies Collaborate with product, design, and engineering teams to deliver impactful updates Apply deep experience in full stack development to solve technical challenges Requirements Extensive background in full stack engineering Experience working with cross-functional teams Ability to work remotely from Toronto or elsewhere

Hello, Future Homie!At Homebase, our mission is to empower small businesses by providing innovative tools that foster growth and success. We cultivate a dynamic, fast-paced environment where empathy and urgency drive our actions. Every member of our team is dedicated to elevating our collective achievements and supporting one another.We're not merely developing an application; we're creating unstoppable teams. Are you ready to join us?Your Impact Begins Here!We are in search of a Senior Full Stack Software Engineer to become a vital member of our Hiring Assistant team—one of the most pivotal initiatives for Homebase's future.This team is redefining the hiring process through the application of AI technology, enhancing everything from candidate discovery to screening and onboarding. You will play a crucial role in developing intelligent workflows that minimize friction for small business owners and expedite job searching for workers.In this impactful role, you will oversee end-to-end system development, shape architectural design, and drive AI-powered product innovations through the technology stack (React + Ruby on Rails).If you're passionate about creating AI-driven products that operate with speed, independence, and tangible impact, we want to connect with you.Your Contributions Will Include:Leading the design and development of scalable full stack systems utilizing React (frontend) and Ruby on Rails (backend)Taking ownership of complex features from conception through to production, focusing on Hiring Assistant workflowsArchitecting and evolving systems that facilitate AI-powered hiring experiences (screening, matching, automation)Integrating and applying AI/LLM tools, agents, and automation frameworks to enhance product functionality and team efficiencyCollaborating closely with Product, Design, and Data teams to achieve rapid, high-quality resultsDriving technical decision-making regarding system design, performance, and scalabilityEnhancing engineering efficiency through tools, experimentation, and AI-assisted development workflowsMentoring fellow engineers and elevating standards for code quality, testing, and implementation

A Few Notes:Thriving B2B SaaS organization with teams operating across North America.This position offers a predominantly remote work arrangement based in Toronto, with monthly team meetings.Candidates must possess legal authorization to work in Canada; visa sponsorship is not an option.We are expanding our Engineering team and seeking a Full Stack Developer skilled in Python and React to join our applications team.We welcome applicants with experience levels ranging from Upper Intermediate to Staff Engineer.This role encompasses full-stack responsibilities, but we are open to candidates who have a stronger focus on back-end development.About Us:We are recognized as a leading retail analytics platform, empowering marketing teams and brands to gain insights from their retail data and execute targeted media campaigns without needing coding skills. Our mission is to enhance our clients' understanding of their customers while maximizing the return on their marketing investments. Notably, one of our significant clients is Home Depot.Our Technology Stack: Python, Django, React, Typescript, Azure.How We Work:We foster a collaborative environment with an array of exciting and complex projects.We support the exploration of new technologies, reflecting our identity as a modern tech company.Our focus is on sustainable development; we are already profitable and prioritize quality.With a remote work setup, we convene once a month in Toronto and hold biannual company retreats.About You:We are on the lookout for a remarkable Senior/Staff/Lead Full Stack Engineer eager to make a significant impact on our applications team.Key Responsibilities:Full Stack Development: Manage end-to-end client feature development, from initial design to final delivery.Integration Projects: Collaborate with industry leaders like Meta, TikTok, and Snapchat within the ad tech domain.User Interface Enhancements: Optimize the UI experience for our enterprise clients.Qualifications:Over 6 years of full-stack development experience in creating enterprise-level B2B/B2C SaaS applications.

About HTS MediaHTS Media is the advertising and media division of Hopper, dedicated to connecting travel brands, destinations, and suppliers with travelers at scale. Our platform facilitates advertising placements across Hopper’s app and through our extensive B2B partner network, which includes prominent brands such as Capital One Travel and TripAdvisor. Our objective is to establish the travel industry’s premier retail media network, transforming advertising into a significant profitability driver for Hopper and our partners, similar to the successes achieved by Instacart, Uber, and Amazon in their respective markets.Though we are in the early phases of our growth, HTS Media has rapidly emerged as one of Hopper’s fastest-growing and most lucrative business units. The engineering team plays a crucial role in expanding the platform, ensuring our ad tech solutions deliver measurable results for advertisers while providing seamless experiences for travelers.About the RoleAs a Senior Full-Stack Engineer on the HTS Media team, you will be instrumental in driving innovation for our advertising products. Your primary focus will be to design and test new ad experiences, taking ownership of the technologies that deliver these features to travelers across the web. You will leverage Hopper's own website as a testing ground, swiftly implementing and refining new ad formats and features to validate their effectiveness.Your expertise will also extend to packaging these successful innovations for our B2B partners by creating user-facing ad products, contributing to our JavaScript SDK, and developing the robust APIs that support our operations. This position calls for a product-oriented engineer who is enthusiastic about crafting seamless user experiences and is adept at working across the complete technology stack—from client-side rendering to backend API logic.

Join Affinity as a Full-Stack Engineer II and be a key player in developing innovative software solutions that drive our business forward. In this role, you will collaborate with cross-functional teams to design, implement, and maintain robust applications. You will leverage your expertise in both front-end and back-end technologies to enhance user experiences and optimize system performance.

Role overview The Full Stack Engineer, Integrations at StackAdapt focuses on building and enhancing integration solutions that enable smooth data exchange between platforms. This role combines backend and frontend development to connect systems and improve workflows. What you will do Develop and maintain integration solutions to support reliable data flow across multiple platforms. Collaborate with cross-functional teams to design, implement, and improve full-stack applications. Contribute to technical projects that drive business results by delivering new features and refining existing systems. Location This position is open to candidates based in Calgary, Toronto, Vancouver, or elsewhere in Canada.

At Cerebras Systems, we are revolutionizing AI technology with the world's largest AI chip, which is 56 times larger than traditional GPUs. Our innovative wafer-scale architecture equips users with the computational prowess of multiple GPUs on a single chip, simplifying programming tasks. This groundbreaking approach enables unparalleled training and inference speeds, allowing machine learning practitioners to seamlessly operate extensive ML applications without the complexities of managing numerous GPUs or TPUs. Cerebras proudly serves an impressive clientele, ranging from leading model laboratories to major global enterprises and pioneering AI startups. A testament to our capabilities, OpenAI has recently forged a multi-year partnership with Cerebras, aimed at delivering 750 megawatts of scale and transforming critical workloads through ultra-fast inference. Our state-of-the-art wafer-scale architecture empowers Cerebras Inference to provide the fastest Generative AI inference solution globally, boasting speeds over ten times faster than GPU-based hyperscale cloud inference services. This extraordinary increase in speed is redefining user experiences with AI applications, enabling real-time iterations and enhancing intelligence through additional agentic computation.About the RoleWe are on the lookout for a dynamic and seasoned engineer to join our Inference Core Model Bringup team. This team is tasked with the rapid deployment of advanced open-source models (such as LLaMA, Qwen, etc.) or proprietary models provided by customers on our Cerebras CSX systems. Success in this role necessitates a systems-oriented generalist who flourishes in fast-paced environments and is adept at navigating the entire Cerebras software stack. Your contributions will be instrumental in achieving unprecedented performance, efficiency, and scalability for AI applications.

Role overview AltaML is looking for a Senior Full Stack Software Engineer in Toronto to design and deliver software solutions that integrate artificial intelligence. The position focuses on using Claude Code, the Claude Agent SDK, and the Claude API as core tools at every stage: from planning architecture for machine learning applications to hands-on development and deployment. Responsibilities span the entire technical delivery process, including work across cloud platforms, APIs, and modern front-end frameworks. What you will do Take the lead on technical delivery for projects, including architecture, coding, and deployment of AI-powered applications. Integrate Claude and agentic coding technologies as central components of software solutions. Balance direct engineering work with architectural decisions and technical leadership. Collaborate with clients and internal teams to turn complex requirements into actionable, AI-enhanced solutions. Mentor developers on applying Claude in daily workflows and contribute to shared internal frameworks. Help shape how new AI engineering tools are evaluated and adopted within the team. Requirements Experience building prototypes with Claude Code and scaling them for production use. Strong understanding of agentic development patterns, such as writing clear specifications for Claude, organizing repositories for AI agents, and reviewing AI-generated code. Ability to communicate effectively with both technical and business teams, translating requirements into AI-driven solutions. Solid problem-solving skills, with the ability to choose between LLM-in-the-loop and traditional engineering approaches as appropriate. Interest in machine learning-driven product development and connecting software engineering with intelligent automation and agentic workflows. Location This position is based in Toronto.

Join Feathery as a Full Stack EngineerAt Feathery, we revolutionize data intake workflows for insurance and wealth management sectors. Top industry players depend on us to streamline critical operations such as underwriting, client onboarding, and automated account openings.With our rapid revenue growth and increasing enterprise demands, we're expanding our engineering team to tackle more complex, data-intensive workflows across our innovative platform.Your RoleAs we grow, the intricacies of our backend systems and the sophistication of our frontend experiences are evolving. We are seeking a Full Stack Engineer to develop and scale our core product capabilities from end to end. This position is perfect for someone passionate about owning features across the entire stack—from API design and backend development to creating intuitive, high-performance user interfaces.You will partner closely with product management, design, and engineering teams to deliver impactful features and influence the overall architecture of our platform.Key ResponsibilitiesEnd-to-End Product DevelopmentDesign and implement features across both frontend and backend systems.Create APIs and services that drive essential product functionality.Develop intuitive, responsive, and high-performance user interfaces.Manage features from inception to production.Backend Systems & InfrastructureBuild and scale backend services for workflow automation and data processing.Develop asynchronous pipelines and distributed systems for managing large data volumes.Utilize AWS services and messaging systems (e.g., SQS) to ensure scalable infrastructure.Maintain reliability, performance, and observability across systems.Frontend Experience & PerformanceImplement UI/UX designs that enhance user experience.Optimize front-end performance to ensure quick and smooth user interactions.

About Us At Konrad Group, we pride ourselves on being a leading digital consultancy dedicated to delivering innovative and effective solutions for complex business challenges faced by our global clientele. Our dynamic work culture fosters creativity and collaboration, enabling our talented team to create best-in-class digital products that reach hundreds of millions of users worldwide. We are always on the lookout for exceptionally talented, analytical, and driven individuals who are passionate about continuous learning. Role Overview As a Senior Full Stack Developer, you will play a crucial role in our software development team, focusing on developing web applications. Your expertise will contribute to the creation and deployment of both consumer and enterprise applications. This position is perfect for ambitious developers who are confident in their technical skills and eager to join a highly skilled team at Konrad Group. Key Responsibilities Collaborate with our top-tier team to produce maintainable, testable, and high-performance software. Engage in code reviews and conduct thorough testing to ensure the delivery of high-quality software. Explore and evaluate new technologies and tools, sharing insights with the team. Communicate effectively with all team members to facilitate collaboration and knowledge sharing. Required Qualifications Over 5 years of experience in building and deploying modern, production-grade web applications in a team setting. Strong proficiency in JavaScript, with hands-on experience using tools and frameworks such as TypeScript, Node.js, and Next.js. Experience with front-end JavaScript frameworks like React, Angular, or similar. In-depth understanding of the components that constitute a modern web application (APIs, routing, data storage, design patterns, optimization, security). Solid foundational knowledge of core web principles (HTTP, the DOM, SSL, web servers). Excellent interpersonal skills, as teamwork and communication are essential. A proactive mindset with a commitment to delivering exceptional work. A passion for enhancing software development workflows and processes. Preferred Qualifications Experience with custom development using Next.js, Gatsby, Remix.js, or similar technologies. Familiarity with content management systems (e.g., WordPress, AEM, Sitefinity). Experience in cloud environments (e.g., AWS, Google Cloud, Azure). Knowledge of GraphQL, ElasticSearch, Serverless technologies, or Next.js.

Join Veeva Systems, a pioneering force in the cloud technology space, dedicated to accelerating the delivery of life-saving therapies to patients. As one of the fastest-growing SaaS companies, we achieved over $2 billion in revenue last fiscal year, showcasing our immense growth potential.At Veeva, our core values drive us: We prioritize doing the right thing, ensuring customer and employee success, and maintaining a rapid pace of innovation. In 2021, we made history by becoming a public benefit corporation (PBC), committed to balancing the needs of our customers, employees, society, and investors.We embrace flexibility with our Work Anywhere policy, allowing you to choose the environment that helps you perform your best.Be a part of our mission to transform the life sciences industry and make a meaningful impact on customers, employees, and communities.The RoleWe are actively seeking several skilled Full Stack Software Engineers to join our team and develop cutting-edge products in the Life Sciences sector. You will engage with the latest front-end and back-end technologies while addressing some of the most pressing challenges facing the industry today.Ideal candidates will thrive in a dynamic, fast-paced environment, enjoying the stability of a successful and profitable organization. You should have substantial experience in Java and JavaScript applications, along with familiarity with the latest open-source technologies. Experience in enterprise software development or a high-growth tech firm is preferred.

Join our dynamic team at Feathery as a Full Stack Engineer specializing in Artificial Intelligence products. You'll be at the forefront of innovation, collaborating with talented professionals to create cutting-edge applications that shape the future of technology. This role offers a unique opportunity to work on both the front-end and back-end of our AI solutions, ensuring a seamless user experience and robust system performance.