Senior Software Engineer

✨ About the Company Halcyon Labs empowers influencers, creators, and brands of all sizes to develop and launch limited-edition products that matter to their fans. Leveraging our design, manufacturing, and marketing expertise, we work with our partners to bring their products to life through our community-powered crowdfunding platform. Each product is given a window of 21 days to be funded by the community before we produce and ship to fans worldwide. We put our brand behind every product and guarantee quality and ethical sourcing. We're profitable, we have a three-year revenue growth of over 200%, ranking us 97th in 2024 and 86th on The Globe and Mail’s Canada’s Top Growing Companies of 2025 list. We are also excited to announce that Halcyon Labs has officially been Halcyon Labs ,employees%20at%20a%20typical%20company." rel="nofollow ugc noopener noreferrer" target="_blank">Great Place to Work-Certified™ for 3 years in a row! Learn more about us at Halcyon Labs .com. 🧑‍💻 About the Role As an early team member, you’ll play a huge role in shaping our culture, our process, and the future of Halcyon Labs . Every day, you’ll collaborate, learn more about the content creation space, and watch your work impact the company and the community! We want this to be the best work experience of your life, so we’ll pay you well, offer great benefits, invest deeply in your growth, and welcome you with our branded swag. You will also be joining one of Canada's fastest-growing start-ups! 🌟 What We Are Looking For We’re looking for a Senior Software Engineer to play a key part in building, scaling, and shaping Halcyon Labs ’s platform as a part of one of the fastest-moving industries in the world. Working on a cross-functional team, this position delivers high-impact solutions that serve both creators and their fans. This role combines deep technical expertise with leadership. As a Senior Software Engineer, you will lead complex technical initiatives, make architectural decisions that balance short and long-term needs, and raise the bar for code quality and best practices across the team. Beyond writing code, you will improve platform reliability and resiliency, and drive investments in tooling, observability, and processes. In this role, you also act as a mentor and role model — supporting the growth of peers and junior engineers, and fostering a culture of technical excellence, collaboration, and continuous improvement. 🚀 Your Key Responsibilities Lead the technical design, development, and delivery of complex features and projects, ensuring high quality and scalability. Define and contribute to technical roadmaps in collaboration with engineering managers and product leaders. Write clean, maintainable, and efficient code while raising the bar for code reviews, testing, and overall engineering practices. Mentor and support other developers through coaching, knowledge sharing, pairing and delegating where appropriate. Contribute to architectural discussions and make pragmatic choices that balance technical needs with business priorities. Collaborate closely with the product manager, designer, and data analyst, on your team to ensure solutions align with user and business needs. Proactively identify and address technical debt, risks, and opportunities for platform improvement. Implement and refine best practices within the engineering team Support system reliability by troubleshooting, debugging, and improving monitoring and observability practices. 🧠 What You Bring 5+ years of professional software development experience, with at least 2 years in a senior/lead capacity. Full-stack development experience with modern frontend frameworks (React, NextJS) and backend service design (Go or similar languages) Technical leadership, having guided and delivered complex projects from conception to production, making key architectural decisions and raising engineering standards System architecture ownership with experience designing scalable, resilient systems while proactively managing technical debt and platform improvements Strong mentorship and coaching skills and a passion for helping others grow in technical excellence and supporting continuous improvement Ability to communicate technical ideas effectively across technical and non-technical stakeholders while listening actively and fostering a culture of trust and collaboration Demonstrated skills in debugging and resolving production issues under pressure while implementing monitoring and operational best practices 👀 Bonus Ecommerce industry knowledge: experience with platforms like Shopify, understanding of payment processing, order management, and retail business workflows Third-party integration ownership: experience managing and optimizing vendor relationships and technical integrations for both product features and engineering tooling (analytics, monitoring, etc.) Observability practices: hands-on experience with monitoring tools like Datadog, implementing alerting strategies, and building das