Hybrid Senior Full Stack Integrations Developer

at Octopus HR

• Job title: Senior Full Stack Integrations Developer
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Cloud, EC2, ERP, JavaScript, Next.js, Node.js, Postgres, React, SQL, TypeScript
• Location requirements: Hybrid, Ottawa, Canada

About the role

• Senior Full Stack Developer at Octopus HR responsible for integrations and data platforms for a finance-focused SaaS. Involves building scalable systems and mentoring junior developers.

Responsibilities

• Build and maintain integrations with accounting systems such as QuickBooks, Xero, and NetSuite
• Design robust data pipelines connecting CRM, HR, and financial platforms
• Work with data warehousing solutions (Snowflake or similar) to manage and analyze multi-source data
• Ensure data integrity, security, and reliability across all integration points
• Optimize SQL queries and database performance for large-scale data operations
• Design and build scalable APIs capable of handling high volumes of financial and enterprise data
• Diagnose and resolve memory issues and performance bottlenecks causing system instability
• Architect backend services and APIs that support growing data volumes and user traffic
• Optimize database queries and implement caching strategies to improve response times
• Design systems with horizontal scalability and long-term growth in mind
• Lead database design and optimization, ensuring data is stored, accessed, and scaled securely and efficiently
• Implement secure, scalable storage solutions using PostgreSQL or similar technologies
• Champion data integrity, encryption best practices, and compliance standards
• Build and maintain high-performance frontends using Next.js and TypeScript
• Own backend development in Node.js, creating clean, well-documented APIs
• Implement and maintain CI/CD pipelines to streamline deployments and reduce manual overhead
• Ship new features from concept to production with end-to-end ownership
• Coach and mentor junior developers by sharing knowledge, setting standards, and providing thoughtful code reviews
• Foster a high-quality engineering culture grounded in collaboration and continuous improvement
• Help establish and reinforce best practices around performance, security, and code quality
• Work closely with Leadership, Product, Design, and QA to deliver high-quality features
• Participate in sprint planning and lead technical discussions that shape product outcomes
• Communicate complex technical concepts clearly to non-technical stakeholders

Requirements

• 5+ years of full-stack development experience building and operating production systems at scale
• Strong experience building third-party integrations, particularly with accounting or enterprise SaaS platforms
• Experience across the full data stack, including SQL, data warehousing (Snowflake or similar), and CRM/HR/ERP integrations
• Demonstrated ability to manage complex, multi-source data while maintaining data quality and integrity
• Strong cloud infrastructure experience, especially with AWS (EC2, RDS, Lambda, S3, CloudWatch)
• Proven track record of performance optimization and solving scalability challenges
• Deep expertise in TypeScript/JavaScript and modern full-stack development
• Expert-level experience with Next.js or React frameworks
• Extensive experience with database design, optimization, and scaling (PostgreSQL strongly preferred)
• Strong understanding of system architecture and designing for reliability and scalability
• Passion for clean code, security best practices, and modern software architecture
• Proven ability to solve problems creatively and effectively
• Excellent verbal and written communication skills
• Experience with Git-based workflows (GitHub preferred)
• Demonstrated experience mentoring and coaching junior developers
• Experience working in agile environments using tools such as Jira

Benefits

• Impact: Your work will directly support the scalability, reliability, and data integrity of a mission-critical product
• Technical Challenges: Tackle real-world problems across integrations, data pipelines, and system performance
• Team: Join a collaborative, experienced engineering team that values ownership and quality
• Growth: Influence technical direction and grow into broader technical leadership responsibilities