Senior Backend JavaScript Developer

Description

We’re looking for exceptional and experienced Senior Backend JavaScript Developers to join our DCA team, with deep expertise in Node.js and building production-grade backend services. In this role, you will take end-to-end ownership of product and feature development, building SaaS applications and services in a microservices architecture, using modern technologies in a fast-paced and professional environment.

Tech Stack

Node.js, JavaScript, MongoDB, Kubernetes, Redis (including Redis Streams), Snowflake (plus additional relational/NoSQL data stores as needed)

Responsibilities

• End-to-end feature development, from design and implementation to production rollout and ongoing improvements
• Build and operate backend services with a strong focus on scalability, reliability, and performance in a microservices environment
• Participate in system design and architecture planning, and contribute to technical decisions across the team
• Work with asynchronous, message-driven components using Redis Streams, including debugging, tuning, and ensuring resilient processing
• Write high-quality, maintainable code with appropriate test coverage; participate actively in code reviews
• Collaborate effectively with teammates and cross-functional stakeholders to deliver high-impact outcomes
• Continuously learn, adapt, and stay up-to-date with best practices and evolving technologies

Requirements

• 5+ years of hands-on software engineering experience, including 3+ years focused on backend JavaScript / Node.js development
• Proven experience building and maintaining SaaS applications and/or production backend services
• Experience working in a microservices architecture (service boundaries, APIs, reliability patterns)
• Experience with LangChain and LangGraph, including building and orchestrating LLM-powered workflows
• Hands-on experience with MongoDB and Redis (including practical experience with Redis Streams or similar pub/sub/stream processing)
• Familiarity with Kubernetes and containerized deployments
• Good understanding of system design fundamentals: APIs, data modeling, performance, scalability, and reliability
• Fast learner, able to work both independently and as a team player
• Proficiency in English, with strong written and verbal communication skills

Nice to Have

• Experience with Snowflake and data pipelines/analytics
• Experience with AWS and cloud-based production environments
• Experience with relational databases (e.g., PostgreSQL/MySQL) and additional NoSQL technologies
• Experience with observability tooling (logging/metrics/tracing) and incident response