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Senior Software Engineer | Typescript at AffiniPay. Location Information: USA. We are looking for a Fullstack Senior Software Engineer to help build out our expense management team. This team will focus on driving more value to our ever growing customer base through developing a better customer workflow for expense tracking and management.. What You’ll Do. 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.. About You. 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.. Nice to Haves. 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..