Senior Software Engineer

Senior Software Engineer (Full Stack)

Fabletics is currently looking for a Senior Software Engineer (full stack) to design, develop, and maintain scalable, high‑performance web applications using modern frameworks such as React and Node.js within a cloud‑native AWS environment. Leverage modern development tools, including AI‑assisted tooling where appropriate, to improve productivity, code quality, and team efficiency.

• Prototype and evaluate new technologies—including AI capabilities—through rapid experimentation, and help determine when they are ready for production use.
• Build and enhance features that support customer service workflows, including tools for automation, agent assistance, and improved customer interactions.
• Contribute to the integration of AI‑powered capabilities—such as response suggestions, summarization, classification, or workflow automation—where they provide clear, measurable value.
• Own the end‑to‑end lifecycle of features—from technical design and architecture through implementation, deployment, and post‑launch support—with a strong emphasis on scalability, performance, security, and reliability.
• Design and evolve distributed system architectures, making thoughtful tradeoffs between performance, cost, reliability, and developer experience.
• Collaborate cross‑functionally with product, design, data, architecture, QA, and Dev Ops to deliver high‑impact features aligned with customer and business needs.
• Partner with product and design to shape intuitive, efficient user experiences for customer service agents, including those augmented by automation or intelligent assistance.
• Lead and participate in code reviews, ensuring high‑quality, maintainable code and adherence to engineering best practices.
• Troubleshoot and resolve complex technical issues across environments, including issues related to system behavior, integrations, or AI‑assisted features.
• Implement and improve observability practices, including logging, monitoring, tracing, and alerting, and contribute to approaches for validating system behavior—including AI‑assisted or non‑deterministic components where applicable.
• Design and maintain robust APIs and data models, ensuring scalability, consistency, and backward compatibility.
• Drive continuous improvements in engineering standards, tooling, and development processes.
• Mentor junior engineers and contribute to a collaborative, high‑performing team culture.
• Influence technical direction and contribute to architectural decisions and best practices across teams.
• Support and enhance CI/CD pipelines, automated testing strategies, and Dev Ops practices to enable reliable, efficient releases.

• 5+ years of professional software development experience, with strong full‑stack expertise in JavaScript/Type Script, React, Node.js, and RESTful APIs.
• Experience using AI‑assisted development tools (e.g., Claude, Git Hub Copilot, ChatGPT) to improve workflows, with an understanding of their strengths, limitations, and tradeoffs.
• Experience building or integrating systems that include AI/ML components (e.g., LLMs), especially in areas such as text processing, classification, or automation, with awareness of considerations such as latency, cost, reliability, and data privacy.
• Proven experience designing and building scalable, distributed systems in cloud environments, particularly AWS (e.g., EC2, S3, Lambda, RDS, Cloud Formation).
• Experience building or supporting customer‑facing or operational tools (e.g., customer support platforms, internal tools, workflow systems) is a plus.
• Hands‑on experience with containerization and orchestration technologies such as Docker and Kubernetes.
• Strong understanding of application security principles, including authentication and authorization (OAuth2, JWT), and secure coding practices.
• Experience identifying and resolving performance bottlenecks in high‑traffic systems.
• Solid understanding of observability practices, including monitoring, logging, and alerting.
• Experience designing API contracts and data models with a focus on scalability and maintainability.
• Familiarity with modern CI/CD pipelines and deployment tooling.
• Experience working in…