> Markdown version of [/jobs/ext/2522514-senior-software-engineer-nestjs-backend-architecture](https://www.wearedevelopers.com/jobs/ext/2522514-senior-software-engineer-nestjs-backend-architecture). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - NestJS & Backend Architecture - **Company:** Metispro Corp. - **Location:** New York, NY, United States - **Experience:** Expert - **Salary:** $121,083.0 - $137,864.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Query Performance, JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Automation of Tests, Microsoft Azure, Cloud Computing, Databases, Continuous Integration, Couchbase Servers, Data Synchronization, Relational Databases, Dependency Injection, DevOps, Distributed Systems, Fault Tolerance, Github, PostgreSQL, Message Broker, Microsoft SQL Server, MongoDB, MySQL, Node.Js, NoSQL, OAuth, Object-Oriented Software Development, Payment Gateway, PCI Data Security Standards, Performance Tuning, Process Driven Development, Scrum Methodology, Software Architecture, RabbitMQ, Redis, JSON Web Token, Software Engineering, Systems Integration, TypeScript, WebSocket, Workflow Management Systems, System Availability, Caching, Core Api, Backend, Rate Limiting, Git, Event Driven Architecture, Containerization, Gitlab-ci, Integration Tests, Kubernetes, Real Time Data, Apache Kafka, Graphql, Data Management, NestJS, Restful APIs, Domain Driven Design, Webhooks, Docker, Microservices - **Published:** August 10, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=2960b1e2ceb9f1d9 ## About the Role We are seeking a highly motivated Senior Software Engineer specializing in NestJS and TypeScript to join the Quantic POS Platform team. In this role, you will lead the design, development, and scaling of core backend microservices and APIs that power our next-generation Point of Sale (POS) ecosystem. You will architect low-latency transaction processing systems, payment gateway integrations, and real-time data sync modules for retail and restaurant environments. If you are passionate about building resilient distributed systems using modern Node.js/NestJS frameworks in a fast-paced fintech/POS domain, this role is for you. ** Requirement: Must be a U.S. Citizen or U.S. Permanent Resident **, * Backend Expertise: 5+ years of software engineering experience with deep specialization in NestJS, Node.js, and TypeScript. * POS & Fintech Domain Knowledge: Prior experience with Point of Sale (POS), payment processing/PCI compliance, order management, or high-concurrency transaction platforms is strongly preferred. * Data Management: Advanced knowledge of relational databases (PostgreSQL, MySQL, SQL Server), NoSQL solutions (MongoDB), and in-memory stores (Redis) for real-time state management. * Messaging & Microservices: Hands-on experience with microservices architecture, event-driven systems, and message brokers (RabbitMQ, Kafka, or NestJS Microservices). * Cloud & Infrastructure: Familiarity with AWS or Azure services, Docker containerization, and modern CI/CD tools (GitHub Actions, GitLab CI). * Testing & Security: Proficiency with unit/integration testing frameworks (Jest) and secure API design practices (OAuth2, JWT, rate limiting). * Development Methodology: Proven experience operating in Agile/Scrum environments using Git workflow tools (GitHub). Pay: $121,083.25 - $137,863.70 per year Application Question(s): * Requirement: Must be a U.S. Citizen or U.S. Permanent Resident. Other applications will be rejected. ## Description * NestJS & Node.js Core Development: Design, build, and maintain high-throughput, modular backend services using NestJS and TypeScript across the Quantic POS platform. * API & System Integration: Develop secure RESTful and GraphQL APIs, WebSockets, and webhooks to power hardware terminals, mobile POS applications, online ordering systems, and third-party payment gateways. * Distributed Architecture: Design and optimize distributed systems for fault tolerance, offline-online data synchronization, and high availability during peak transaction volumes. * Database & Performance Optimization: Architect and optimize query performance across relational (PostgreSQL) and NoSQL/Caching layers (Couchbase, Redis) for sub-second POS checkout pipelines. * Code Quality & Testing: Maintain clean code standards using NestJS dependency injection, object-oriented design (OOP), domain-driven design (DDD), and automated testing suites (Jest, Supertest). * Cloud & DevOps Alignment: Collaborate with DevOps teams to deploy microservices on cloud infrastructure (AWS/Azure) utilizing Docker, Kubernetes, and automated CI/CD pipelines. * Agile Collaboration: Participate actively in Agile ceremonies, translating complex POS product requirements into scalable technical architecture and actionable technical specs. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Branch your database like your code: How schema changes and pull requests go hand in hand](https://www.wearedevelopers.com/videos/350-branch-your-database-like-your-code-how-schema-changes-and-pull-requests-go-hand-in-hand) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) ## Related Articles - [Highest Paying Tech Companies in Europe](https://www.wearedevelopers.com/magazine/162-highest-paying-tech-companies-in-europe) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [Backend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/196-backend-developer-salary-in-germany-2023) - [Frontend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/195-frontend-developer-salary-in-germany-2023)