Senior Backend Engineer, Nest.js

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🕒 April 27

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Newfire Global Partners

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2016

🤝 B2B

🤖 Artificial Intelligence

💳 Fintech

B2B • Artificial Intelligence • Fintech

Newfire Global Partners is an American IT services and advisory firm (founded in 2016 in Boston) that provides talent augmentation, software engineering, data & analytics, and AI/ML advisory to enterprise and investor clients. The company offers multidisciplinary engineering, product, and marketing teams, technical due diligence for VC/PE, data platform optimization, and an internal ML tool (Novel Heat) to improve code quality and Scrum velocity. Newfire operates across the Americas, Europe, and APAC with a 24x5 follow-the-sun delivery model and focuses on sectors such as digital healthcare, fintech, cybersecurity, and education technology.

📋 Description

• 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.

🎯 Requirements

• 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. • 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