Senior Software Engineer

Summary

Join AffiniPay, a leading fintech company, as a Fullstack Senior Software Engineer to contribute to the development of an expense management platform. You will design and implement scalable applications using NestJS and NextJS, build and maintain an Atomic Design system, and develop robust backend APIs and microservices. Collaborate with product and UX teams, optimize database schemas, and work with DevOps for deployment and maintenance on AWS. Mentor junior engineers, lead team ceremonies, and drive technology initiatives to enhance application performance. Stay updated on Node.js ecosystem trends and cloud-native technologies.

Requirements

• BS in Computer Science or related field, or equivalent professional experience
• 7+ years of experience designing, implementing, and debugging large-scale, cloud-based solutions
• Strong expertise in TypeScript and the Node.js ecosystem, with production experience in both NestJS and NextJS frameworks
• Extensive experience building production-grade React applications within NextJS, including SSR/SSG implementation, API routes, and performance optimization
• Proven experience working with monorepo architectures, preferably with Nx, including understanding of dependency graphs and build optimization
• Solid understanding of Atomic Design principles and experience building scalable design systems
• Professional experience with PostgreSQL, including query optimization, migrations, and ORM usage (TypeORM/Prisma)
• Experience with containerization, Kubernetes orchestration, and Helm chart development
• Familiarity with infrastructure as code principles and hands-on Terraform experience
• Experience with Lean product development and Agile frameworks (e.g., Scrum, Kanban)
• Strong understanding of SOLID design principles, design patterns, and clean architecture in TypeScript
• Excellent teamwork, documentation, and communication skills

Responsibilities

• Design and implement scalable applications within our Nx monorepo using NestJS for backend services and NextJS for frontend applications
• Build and maintain our Atomic Design system, creating reusable components that ensure consistency across all applications
• Develop robust backend APIs and microservices using NestJS, leveraging TypeScript's type safety and decorators
• Create performant, SEO-friendly frontend applications with NextJS, implementing SSR/SSG strategies where appropriate
• Collaborate with product teams to assess trade-offs, identify risks, and align improvements with business objectives
• Design and optimize PostgreSQL database schemas, write efficient queries, and implement proper data access patterns
• Work with DevOps to deploy and maintain applications on AWS using Kubernetes and Helm charts
• Contribute to infrastructure as code using Terraform, ensuring reproducible and scalable deployments
• Mentor and coach software engineers on monorepo best practices, TypeScript patterns, and our tech stack
• Partner with UX teams to implement our design system, ensuring consistent user experiences across all products
• Support software deployments by debugging containerized applications and troubleshooting Kubernetes deployments
• Lead team ceremonies, including sprint planning, grooming, and retrospectives, ensuring effective communication and coordination
• Drive technology initiatives to enhance application performance, scalability, and maintainability within the monorepo structure
• Stay updated with Node.js ecosystem trends, monorepo tooling advances, and cloud-native technologies

Preferred Qualifications

• Advanced monorepo experience, including custom executors, generators, and build optimization strategies. Preferably experience with Nx
• Experience with AWS services beyond EKS (Lambda, RDS, S3, CloudFront, etc.)
• Proficiency with Kubernetes ecosystem tools (kubectl, k9s, Lens) and GitOps practices
• Experience implementing CI/CD pipelines for monorepo environments
• Knowledge of microservices patterns and inter-service communication in NestJS
• Experience with GraphQL implementation in NestJS/NextJS stack
• Familiarity with observability tools in Kubernetes environments
• Experience building scalable Software as a Service (SaaS) applications
• Understanding of cloud-native security best practices and implementation

Benefits

• All employees receive fully covered medical, dental and vision coverage - Choose from our 2 available health plans based on what fits you and/or your family!
• Have some fur babies? - We offer them insurance too!
• RELAX and enjoy your time away with our flexible paid time off policy!
• We will help you plan for your future - 401K, or RRSP if in Canada, with a company match
• Competitive compensation packages that include mid-year and end-of-year bonuses and equity options for all full-time employees
• Health Wellness Program that includes nutrition consultations, mental health apps, and access to discounted memberships
• Have plans to grow your family? - Parental resources, including 16 weeks of paid time off for primary caregivers
• Professional development opportunities including mentorships, leadership programs and our AffiniPayU courses
• We believe it is important to give back with our Matching Gift Program and organized activities focused on donations, volunteerism and supporting the local communities throughout the country
• D&I initiatives provide educational opportunities regarding multicultural issues, tolerance, and celebrating diversity among our entire staff
• An incredible, in-office experience at our headquarters in Austin and San Diego including free lunch delivery, a fully stocked kitchen, and some “sweet” surprises for those afternoon pick-me-ups