Senior Full Stack Developer (Short Term Contract)

Job Description This is a remote position. Innosphere is seeking a Senior Full Stack Developer to join our client’s team through the end of 2026. In this role, you’ll help build and modernize cloud-based applications across both frontend and backend systems. The ideal candidate is a senior software engineer with strong experience in TypeScript, React, Node.js, and AWS, along with experience building scalable APIs, cloud-native services, and automated testing solutions. You’ll work closely with development, architecture, and product teams to deliver new features and support ongoing platform modernization. Roles & Responsibilities Design, develop, and maintain high-quality, scalable software solutions using TypeScript, React, Node.js, and C# across frontend and backend architectures. Develop reusable services and shared business logic to support application scalability, maintainability, and long-term platform growth. Design and maintain cloud infrastructure using Terraform across AWS services. Develop and maintain automated testing solutions to support application quality and reliability. Contribute to modern frontend architecture, including microfrontend applications and state management solutions. Work with PostgreSQL to develop and maintain database schemas, migrations, queries, and data access solutions. Develop and maintain GitLab CI/CD pipelines to support automated testing and application deployments. Collaborate with architects, developers, and product teams to translate business requirements into effective technical solutions and deliver new platform capabilities. Participate in code reviews, technical discussions, and continuous improvement initiatives while leveraging AI coding assistants to improve development efficiency and code quality. Qualifications Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). 7+ years of professional software development experience building commercial software applications. Strong experience developing modern full stack applications using React, TypeScript, and Node.js, including frameworks such as NestJS, Fastify, or similar web server frameworks. Strong experience with AWS, including Lambda, API Gateway, ECS, DynamoDB, S3, and CloudFront. Proven experience with PostgreSQL, including database development and migrations. Experience with Terraform for Infrastructure as Code (IaC) and GitLab CI/CD pipelines. Experience with Jest and Playwright for automated testing. Experience working with Docker and modern cloud-native application environments. Working knowledge of C#/.NET is required. Experience using AI coding assistants such as GitHub Copilot, Cursor, Claude Code, or similar tools. Strong analytical, problem-solving, and collaboration skills. Preferred Qualifications Experience with OpenTelemetry and application observability tools. Familiarity with security and dependency scanning tools such as GitGuardian, Veracode, and Sonatype. Experience building or working with AI-powered testing or development agents. Experience with accessibility testing, including pa11y. Familiarity with Amplitude or other product analytics platforms. Innosphere welcomes and encourages applications from people with disabilities. Accommodations are available upon request for candidates participating in all stages of the selection process. Please note that only applicants selected for shortlisting will be contacted. All successful candidates are subject to criminal, educational, and employment background checks. Applicants must currently reside in Canada and be legally authorized to work in Canada. At Innosphere, we value transparency throughout our hiring process. We use Applicant Tracking Systems (ATS) and AI-assisted tools to support application management and recruitment workflows. Every application is reviewed fairly, and all final hiring decisions are made by our hiring team.