Senior Backend Nest.js Engineer

Newfire Global Partners is a leading technology firm that specializes in building transformative software solutions for some of the world’s most innovative companies. With a presence across four continents, Newfire Global brings deep expertise in digital healthcare, AI-driven analytics, and enterprise technology. The firm’s track record of delivering scalable, high-impact solutions has made it a trusted partner for organizations seeking to drive meaningful change through technology. We are passionate about the purpose-driven mission to help improve the quality of care for patients and are building a collaborative, innovative, and inclusive culture. We are a fully funded company founded by serial entrepreneurs with a stable client base. Opportunity for impact We are seeking a Senior Nest.js Developer to join our backend development team. In this role, you will design and build scalable backend services using Nest.js, help drive architecture and system improvements, and collaborate closely with frontend, product teams. You will also play a mentoring role for more junior engineers, and contribute to defining best practices around testing, code quality, and deployment. Your day-to-day activities: Design, build, and maintain backend services/APIs using Nest.js, MongoDB, and TypeScript. Architect scalable, maintainable, and secure microservices / modular applications. Collaborate with frontend teams, product managers, and UX to translate requirements into robust endpoints. Ensure high test coverage: unit, integration, end-to-end tests. Optimize performance, reliability, and scalability of existing systems. Participate in code reviews, provide technical feedback and mentor junior engineers. Work on CI/CD, observability (metrics/logging), deployment, and rollback plans. Maintain good API documentation and versioning. Stay up-to-date with backend innovations, security best practices, and apply improvements. As a Senior team member, you will be expected to actively participate in our hiring processes by serving on interview panels for future roles across the company. You’re a perfect match if you have: Must have 5+ years of professional experience building backend services / APIs, with at least 2+ years working with Nest.js in production. Deep proficiency in TypeScript; solid understanding of JavaScript core. Strong design skills in API architecture: REST. Experience with NoSQL document databases (particularly MongoDB); schema design, query optimization, migrations. Experience with containerization (Docker) and orchestration. Experience with Lucene-based search (MongoDB Atlas, Elasticsearch, OpenSearch, or similar). Experience using vector embeddings and AI API features. Experience building modular systems / microservices. Thorough experience with testing (unit, integration, mocks, error paths). Strong skills in version control (Git), code reviews, and CI/CD pipelines. Good understanding of cloud deployments (e.g., AWS, Azure, or comparable) and shipping services to production with monitoring, logging, alerting. Excellent problem-solving skills, ability to debug complex issues in production. Strong verbal and written communication skills; ability to articulate trade-offs, document work. Nice to Have Experience with domain-specific complexities: high-traffic load, data-intensive operations, health or content-heavy applications. Exposure to streaming, event-driven architecture; experience with related tools like Redis, BullMQ, RabbitMQ, etc. Experience with GraphQL, WebSocket, or real-time features. Familiarity with Drupal and PHP. Experience with SQL databases (MSSQL, MySQL, or similar). Familiarity with .NET. Familiarity with multitenant systems. Familiarity with infrastructure as code (Terraform, CloudFormation, etc.). Experience with performance tuning, caching strategies, rate limiting, etc. Previous experience with mentoring / leading small teams Please note that employment will be contingent upon providing documentation verifying your legal work authorization in the country of residence, in accordance with applicable law.