Full Stack Engineering Intern at Cresta | Toronto

Who We Are: Founded 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 understand that experiences matter and are committed to creating products that foster genuine human connections. Recognized as one of Built In's top workplaces of 2025, we believe our people are our strongest asset. Our company culture promotes empowerment, encourages collaboration, and embraces innovation by leveraging data to continuously evolve.At Vivid Seats, we harness cutting-edge technology to enhance performance and ignite creativity. We are committed to utilizing AI tools to improve decision-making, streamline workflows, and produce superior outcomes for our customers.

About Us: Established in 2001, Vivid Seats (NASDAQ: SEAT) stands as a premier online ticket marketplace, dedicated to seamlessly connecting fans with the live events, artists, and teams they cherish. We firmly believe in the transformative power of experiences and are unwaveringly committed to crafting products that foster human connections. Recognized as one of Built In's top workplaces in 2025, we understand that our people represent our most significant competitive advantage. Our culture is designed to empower employees to embrace challenges, promote collaboration, and continuously innovate through data-driven insights.We harness cutting-edge technology to enhance performance and unleash creativity. In our culture of innovation, we embrace AI tools to facilitate improved decision-making, streamline workflows, and deliver superior outcomes for our customers.

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.

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.

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.

We are seeking a talented Senior Full-Stack Developer who is passionate about creating scalable applications and tools that empower our internal teams. This position emphasizes the integration of AI capabilities into production systems, ensuring that our solutions are not only innovative but also reliable. You will play a key role throughout the development lifecycle—from architecture and implementation to deployment and optimization—while collaborating with cross-functional partners to deliver exceptional solutions.Take the lead on full-stack development initiatives, focusing on AI-enhanced functionality from the design phase to deployment.Work collaboratively across teams to discover opportunities for embedding AI-driven solutions within existing systems and workflows.Design, develop, and maintain both front-end and back-end components, ensuring high standards of code quality, scalability, and performance for new builds and existing applications.Participate in code reviews, contribute to architectural discussions, and uphold shared engineering standards.Enhance and develop data integrations, APIs, and tools to streamline and automate processes.

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.

Position Overview As a Senior Web Developer, you will serve as a pivotal individual contributor and the primary technical guide for our marketing web properties. This role entails taking ownership of architectural direction, ensuring adherence to coding standards, driving performance optimization, and expediting the delivery of high-quality features. You will also mentor contractors, enhance engineering practices, and maintain the efficiency and experimentation readiness of our WordPress and modern JavaScript stack. Why Join Tipalti? Tipalti is an innovative, AI-driven platform revolutionizing finance automation for businesses globally. Our mission is to empower finance teams to scale efficiently and effectively by simplifying global business operations and enhancing financial efficiency. Our comprehensive suite of finance automation solutions caters to mid-market companies across various domains including accounts payable, global payouts, procurement, employee expenses, corporate cards, supplier management, tax compliance, and treasury. We collaborate with esteemed financial institutions such as Citi, Wells Fargo, J.P. Morgan, and Visa, facilitating secure and efficient payments for over 5,000 global companies to millions of suppliers across more than 200 countries and territories, in 120 currencies. At Tipalti, we cultivate a collaborative culture that values product quality and the capabilities of our people. Our team members are dedicated and driven, striving for success together. We offer competitive benefits, a flexible work environment, career coaching, and a space where diverse individuals can thrive and create a meaningful impact. Our culture emphasizes teamwork and shared success. Founded in Israel in 2010, Tipalti is headquartered in the San Francisco Bay Area (Foster City) and has offices in Tel Aviv, Plano, Toronto, Vancouver, London, Amsterdam, Tbilisi, and Medellin. Key Responsibilities: Architecture Ownership: Assess, refactor, and enhance the WordPress/PHP and frontend JavaScript architecture to ensure scalability, maintainability, and performance across all our marketing web assets. Coding Standards & Governance: Develop and document front-end and back-end standards (PHP, JS, HTML, CSS, performance, security fundamentals); promote adoption through code reviews and mentorship. Performance Optimization: Collaborate with the WebOps team to boost site performance. Feature Delivery: Strategize and roll out new site features, embedding best practices for performance, accessibility, and usability.

Join Ideogram as a Full Stack Product EngineerAt Ideogram, we are on a mission to democratize world-class design, enhancing human creativity through innovative solutions. Our proprietary generative media models and AI-driven creative workflows address significant challenges in graphic design. Our talented team comprises industry pioneers who have contributed to breakthroughs in technologies like Diffusion Models and Google’s Imagen and Imagen Video. We are passionate about combining design, taste, and craftsmanship with cutting-edge research and engineering, delivering experiences that creatives adore.With nearly $100M in funding from top investors like Andreessen Horowitz and Index Ventures, and a headquarters in Toronto alongside a growing presence in NYC, we are expanding rapidly, with goals to triple our team within the next year. We foster a flat organizational structure that encourages ownership, collaboration, and mentorship.About The RoleAs a Full Stack Product Engineer, you will play a crucial role in developing products that empower creators by seamlessly integrating generative AI into their workflows. You will engage with all facets of product development, from designing engaging user experiences to optimizing backend systems that cater to millions. We seek a candidate who possesses a strong product instinct, user empathy, and the ability to thrive in the fast-evolving AI landscape.

Join Stripe as a Full Stack Engineer specializing in billing solutions. In this role, you will be pivotal in designing, developing, and enhancing our billing systems. You will collaborate with cross-functional teams to create user-friendly interfaces and robust backend services. Your contributions will directly impact our mission to simplify payments and empower businesses globally.

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 Our Team as a Full Stack EngineerAt Vantage Analytics, we are seeking a passionate Full Stack Engineer to become an integral part of our Product Development Team. In this role, you will leverage your expertise across the technology stack to develop and maintain high-performance, scalable systems that enhance our platform's core functionalities. Collaborating closely with fellow engineers and product managers, you will be responsible for delivering features that are not only technically sound but also centered on user experience. If you share our enthusiasm for the transformative power of exceptional software, we want to hear from you!This is a newly created position, providing a unique opportunity to influence our product direction.

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.

Join Rockstar, an innovative early-stage startup, as we revolutionize the month-end closing process for enterprise accounting teams. Our founding team combines extensive experience in finance and engineering, having led finance organizations at top tech companies and developed robust month-end close systems in major enterprises. Backed by prestigious investors and finance leaders, we are poised to make a significant impact in the industry.About the CompanyAt Rockstar, we are on a mission to simplify the often complex and tedious month-end closing process for enterprise accounting teams. Our founders possess a unique blend of expertise, having managed finance departments in leading tech firms and engineered month-end close solutions for large corporations. With a record-setting seed investment from top venture capital firms and support from finance executives at renowned technology companies, we are well-equipped to drive change in the accounting landscape.Role OverviewAs we establish our new engineering office in Toronto, we are seeking a founding engineer to play a pivotal role in product development. In this position, you will have the opportunity to influence both the front-end and back-end architecture while collaborating closely with founding members and early adopters to address intricate financial challenges.Key ResponsibilitiesLead full-stack development for essential product features, including reconciliations, flux analysis, and accruals automation.Develop and sustain robust integrations with financial systems such as ERPs, HRIS, procurement software, and CRMs.Design and implement critical backend components, including job frameworks, flexible data ingestion, and complex financial modeling.Adhere to software development best practices by ensuring high code quality, automated testing, and CI/CD processes.Collaborate with the founding team on product strategy, feature prioritization, and user feedback.Establish and maintain planning and agentic workflows utilizing cutting-edge large language models.Engage in technical discussions regarding scalability and security.Contribute to building a dynamic engineering team and fostering a collaborative culture.Required SkillsBachelor’s or Master’s degree in Computer Science or a related discipline.1-3 years of experience in full-stack development, preferably within early-stage startups.Strong background in developing financial systems is highly desirable.Proficiency in front-end technologies, particularly React and NextJS.Extensive back-end development experience with Go or similar programming languages.Solid understanding of relational databases and data modeling.Familiarity with cloud infrastructure, such as AWS or GCP.A willingness to learn and adapt to machine learning concepts.

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 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.

Feathery is looking for an entry-level Full Stack Engineer to join the team in Toronto. This role offers a chance to work on products that make a real impact for insurance and wealth management clients. About Feathery Feathery helps insurance and wealth management companies manage data intake more efficiently. Many leading firms rely on Feathery to handle critical processes like underwriting, client onboarding, and automated account openings. With revenue climbing and more enterprise customers coming on board, Feathery is growing its engineering team to support ambitious product and market goals. Why This Role As Feathery expands, both the backend systems and the frontend experience are becoming more advanced. The team is searching for a Full Stack Engineer who wants to take ownership of features throughout the stack. This includes everything from designing APIs and backend logic to building user-friendly, high-performance interfaces. Working closely with product, design, and engineering colleagues, this engineer will help deliver features that shape the future of the platform. Role Overview Work on both frontend and backend product development Design systems and develop APIs Implement user interfaces with a focus on performance and usability Collaborate across teams, especially with product and design This position offers the chance to understand the bigger picture of system architecture while also focusing on delivering polished product experiences. What You’ll Do Full Stack Product Development Design and build features on both the frontend and backend Create APIs and backend services that power core product features Develop responsive, efficient user interfaces Take features from concept through to production launch Backend Systems & Infrastructure Develop and scale backend services for automating workflows and processing data This role is based in Toronto and is ideal for someone early in their engineering career who wants to grow by taking on meaningful product work.

Join Benevity - Pioneering Social ImpactBenevity is transforming the way organizations contribute to social good by providing cutting-edge technology that empowers companies and their employees to take meaningful action on the causes they care about. We support Fortune 100 companies in enhancing their cultures and leveraging their influence for positive change through charitable giving, volunteering, and more. As one of Canada's first certified B Corporations, we're dedicated to blending purpose and profit. Our team spans across countries including Canada, Spain, Switzerland, the UK, and the US, working collaboratively for a better world.Position Overview:We are seeking a Senior Software Developer with expertise in full stack development to become a vital part of our Product & Engineering team. In this role, you will play an essential part in enhancing our innovative platform, working alongside Product Managers and Key Partners to ensure our Financial Platform delivers an exceptional user experience that drives social impact. Your efforts will help refine the Financial Engine that empowers leading companies to engage their employees and customers in purposeful actions.

Join our dynamic team as a Senior Full-Stack Developer, where you will be instrumental in crafting scalable applications and tools that bolster our internal teams. This role emphasizes the integration of AI capabilities into our production systems, guiding projects through all phases of the development lifecycle—architecture, implementation, deployment, and optimization. As a vital member of our multifaceted team, you'll collaborate closely with various departments to deliver high-quality, reliable solutions. This position is perfect for a technology enthusiast who thrives on navigating the evolving landscape of AI technologies in a practical and innovative manner.Lead full-stack development initiatives from conception to deployment, with a strong focus on AI-enhanced functionalities.Work collaboratively with cross-functional teams to identify and integrate AI-driven solutions into existing systems and processes.Design, develop, and maintain both front-end and back-end components, ensuring code quality, scalability, and performance for new developments and existing applications.Participate in code reviews, contribute to architectural decisions, and uphold shared engineering standards.Enhance data integrations, APIs, and tools to streamline and automate workflows.