Senior Full Stack Software Developer with React.js Expertise

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

Veeva Systems is a forward-thinking, mission-driven organization that is at the forefront of industry cloud solutions, dedicated to accelerating the delivery of therapies to patients in the life sciences sector. As one of the fastest-growing SaaS companies in history, we achieved over $2 billion in revenue last fiscal year and are poised for further significant growth.Our core values at Veeva—Do the Right Thing, Customer Success, Employee Success, and Speed—define our approach to business. We made history in 2021 by becoming a public benefit corporation (PBC), which means we are legally committed to balancing the interests of our customers, employees, community, and investors.As a Work Anywhere company, we offer the flexibility to work from home or in our office, allowing you to excel in an environment that suits you best.Join us in transforming the life sciences industry, as we strive to make a meaningful impact on our customers, employees, and communities.

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.

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.

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.

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.

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.

Range Group supports professional travel advisors throughout North America, handling over $4.5 billion in travel sales annually. The company provides advisors with advanced technology and 24/7 support. Through the Range Foundation, 10% of group profits go toward scholarships, education programs, cultural infrastructure, and crisis relief projects. Location and Work Arrangement This Senior Full Stack Software Developer position is open to candidates across Canada. Those within commuting distance of the Toronto office (2 Queen St. E) follow a hybrid schedule, working onsite two days each week. Fully remote work is available for candidates living farther away. Role Overview The role joins TripArc's ADX platform team, focusing on the core booking tool used daily by thousands of travel advisors. While other teams develop the next generation of the platform, this position is dedicated to ongoing improvements of the current system, enhancing speed, reliability, and user experience. This is a full-stack role with a strong emphasis on backend development. Project focus shifts with each sprint: one cycle may streamline payment workflows, while another might enhance 24/7 service features or boost performance during busy periods. The position offers ongoing technical challenges and opportunities to make a direct impact. Key Responsibilities Lead investigations into technical issues and recommend practical solutions Work with Product and QA teams to clarify project scope and deliverables Implement improvements that affect thousands of travel advisors in real time Balance backend development with occasional frontend tasks as needed How We Build Developers at Range Group are encouraged to use AI coding tools (such as GitHub Copilot, Claude, or Cursor) in their workflow. This approach is standard practice, intended to speed up development while maintaining quality through code review and testing. Success in this environment depends on using AI assistance thoughtfully, without compromising code quality.

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.

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.

About Us:Centah, a proud member of Financeit, is a leading SaaS provider dedicated to empowering home improvement businesses. Our innovative platform streamlines lead management, routing, and conversion, acting as the backbone of our clients' operations.Our Journey: We are transitioning from creating tailored solutions for a select group of large clients to launching a scalable SaaS platform for the broader market. This strategic shift is not only intentional but also fully funded, with a robust roadmap extending to 2028. This is a unique opportunity to influence the future of our product, rather than just maintaining an existing one.The environment at Centah is hands-on and impactful, offering significant ownership and visibility throughout the organization. You will collaborate closely with various teams, contribute to vital business decisions, and witness the tangible results of your efforts.We seek passionate individuals eager to contribute to our growth and shape the next chapter of Centah.Role Overview:In this position, you will navigate a complex ecosystem, managing the ingestion, transformation, and routing of data among partners, internal workflows, and downstream systems. Your work will focus heavily on integrations, including APIs and third-party systems, ensuring they operate seamlessly even in unpredictable environments.Our technology stack includes Ruby on Rails, Ember.js, and PostgreSQL—mature tools that must maintain stability, security, and performance as we expand.As we invest in scaling our system and supporting new go-to-market strategies, you will have the opportunity to shape the product's evolution rather than simply maintaining it.We are looking for a seasoned engineer excited to take ownership of challenges from start to finish. You should care about data consistency, understand potential failure points, and write code that remains clear and maintainable over time.You will collaborate with product-focused engineers, raise the quality bar, and help evolve our platform in line with our growing domain. If you thrive in an environment where ownership, clear thinking, and building resilient systems are paramount, we want to hear from you.Your Responsibilities:Manage features from initial design through to production and iterative improvements (API, domain logic, background jobs, and UI).Create clean, testable, and maintainable code with well-defined separation of concerns.Make architectural choices to enhance reliability, scalability, and clarity of the system.Deliver new features, resolve defects, and enhance existing systems rather than just addressing superficial issues.Collaborate closely with Developers, Product, Design, and stakeholders to develop comprehensive solutions.Proactively identify risks, edge cases, and trade-offs, driving decisions forward.Mentor junior engineers on architecture, ownership, and code excellence.Contribute to team processes to improve our delivery capabilities and overall efficiency.

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.

Job Title: Full-Stack Software Engineer (Multiple Positions Available)Salary: $100,000 - $220,000 + equity options.Location: Remote with occasional in-person work at our co-working space in downtown Toronto.About UsFiscal.ai, formerly known as FinChat, is a pioneering research and data platform specifically designed for capital markets. By integrating a robust research Terminal with modern APIs, we are redefining the financial data landscape. With $13 million in venture capital backing and a strong presence in Toronto, we serve thousands of customers and millions of end-users through our API offerings, positioning ourselves as the premier financial data company in the AI era.Role Overview:As a member of our dynamic engineering team, you will play a vital role in developing innovative solutions at the intersection of AI and finance.Key Responsibilities:Design and develop the Fiscal.ai Terminal product.Construct and enhance Fiscal.ai's financial data infrastructure and API services.These roles demand a comprehensive understanding of full-stack development, LLMs, and finance. If you believe you're a perfect fit, we look forward to hearing from you!

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.

Join the Revolution at HarveyAt Harvey, we are at the forefront of transforming the legal and professional services landscape, implementing not just incremental changes, but a comprehensive overhaul. By leveraging cutting-edge AI technology, a robust enterprise platform, and our extensive domain expertise, we are redefining how essential knowledge work will be conducted for generations.This is a unique opportunity to contribute to the creation of a groundbreaking company poised for significant growth. With over 1000 clients across 58 countries, a strong product-market fit, and esteemed investor backing, we are rapidly expanding and establishing a new category in real-time. Our work is ambitious, our standards are high, and the potential for personal, professional, and financial growth is unparalleled.Our team is comprised of talented, driven individuals who are deeply dedicated to our mission. We operate with urgency and intensity, taking ownership of the challenges we face — from initial ideation to long-term results. We maintain close relationships with our clients, collaborating across all levels to address real-world issues with dedication and care. If you excel in dynamic environments, strive for excellence, and wish to help mold the future of work alongside a team that continually raises the bar, we invite you to join us in this journey.At Harvey, we are writing the future of professional services today — and we are just getting started.Position OverviewAs a Staff Full Stack Software Engineer at Harvey, you will be instrumental in establishing the core of our product platform while developing user-facing features for some of the leading law firms and enterprise clients globally. You will lead the development and maintenance of the platform layer that delivers secure, reliable, and adaptable experiences for our customers, including components like notifications, permissions, and feature flag infrastructure. Our mission also includes creating top-tier collaboration product experiences tailored for law firms.You will be responsible for designing and overseeing systems that serve as foundational infrastructure for the entire organization, directly influencing how our users interact with Harvey’s AI-driven legal tools. This role is well-suited for engineers who are eager to navigate between in-depth platform architecture and hands-on product development.This position is based in Toronto, Canada, and follows a hybrid work model requiring in-person attendance for 3+ days per week, with relocation assistance available for new hires.

As a result of our continued expansion and internal advancements, we are excited to announce multiple openings for Senior Software Engineers across various domains within our organization. You will have the opportunity to work under the guidance of seasoned Engineering Managers who are committed to providing mentorship, fostering autonomy, promoting ownership, and investing in your professional development. If you are ready to elevate your career to the next level, we invite you to connect with us!This position is available in a hybrid format (2 days per week at our Toronto office) or fully remote for candidates located anywhere in Canada.

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 Veeva Systems, we are dedicated to revolutionizing the life sciences industry by accelerating the process of bringing therapies to patients. As a trailblazer in the industry cloud sector, we proudly stand as one of the fastest-growing SaaS companies, achieving over $2 billion in revenue last year and poised for remarkable growth in the years ahead.Our core values drive us forward: Do the Right Thing, Customer Success, Employee Success, and Speed. In 2021, we made history by becoming a public benefit corporation (PBC), emphasizing our commitment to balance the interests of our customers, employees, society, and investors.As a Work Anywhere organization, we prioritize your flexibility to thrive, whether you choose to work from home or in our office.Join us in transforming the life sciences sector, where our commitment to positive impact resonates through our customer relationships, employee satisfaction, and community involvement.The RoleWe are actively seeking multiple skilled Full Stack Software Engineers to develop innovative solutions in the life sciences realm. You will leverage cutting-edge front-end and back-end technologies to tackle some of the most significant challenges of our time.The ideal candidates will thrive in a dynamic startup atmosphere while enjoying the stability of a successful, profitable company. You should possess extensive expertise in Java and JavaScript applications and be well-versed in the latest open-source technologies. Experience in enterprise software development or with high-growth tech firms is highly desirable.