Senior Backend Engineer — Node.js/NestJS, Kafka & Data Lake

Bytamic Solutions; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Fully remote work

International engineering environment

Training and education budget

Job summary

Bytamic Solutions is seeking a Senior Backend Engineer to join an international project modernizing and stabilizing a large-scale enterprise platform serving over 1 million users. You will own backend modules built with Node.js, TypeScript, and NestJS in a Kubernetes environment, tackling performance, reliability, and security challenges.

You will design event-driven architectures with Apache Kafka, integrate Data Lake capabilities, optimize PostgreSQL, and implement robust testing.

Qualifications

• Advanced knowledge of Node.js, TypeScript, and NestJS.
• Proven experience developing and modernizing large-scale enterprise applications.
• Strong experience designing REST APIs and system integrations.
• Hands-on experience refactoring and modernizing modular monolithic applications.
• Advanced, hands-on experience with Apache Kafka, including event-driven architecture, producers, consumers, topics, partitions, consumer groups, retry mechanisms, dead-letter queues, idempotency, and error handling.
• Advanced, hands-on experience with Elasticsearch, including index design, mappings, analyzers, query optimization, full-text search, filtering, aggregations, and synchronization with PostgreSQL.
• Proven experience integrating Data Lake solutions and processing large datasets, including CDC, ETL/ELT pipelines, batch and incremental processing, data consistency, data quality, and synchronization latency.
• Advanced knowledge of PostgreSQL and SQL, including query optimization, indexing, execution plans, transactions, locking, and concurrency management.
• Strong understanding of software architecture principles, including modular monoliths, SOA, event-driven architecture, Domain-Driven Design, Separation of Concerns, and ACID principles.
• Experience designing secure multi-tenant applications and implementing data isolation mechanisms.
• Knowledge of authentication and authorization standards, including OAuth2 and JWT.
• Very good English communication skills.

Responsibilities

• Analyze, refactor, and optimize an existing backend built with Node.js, TypeScript, and NestJS.
• Design and implement event-driven architecture using Apache Kafka.
• Integrate backend applications with Data Lake infrastructure and implement data synchronization using Change Data Capture (CDC).
• Design, develop, and optimize advanced search capabilities using Elasticsearch.
• Identify and eliminate PostgreSQL performance bottlenecks, including moving resource-intensive analytical operations outside the transactional database.
• Modernize data processing mechanisms handling hundreds of thousands of records.
• Design reliable business processes while ensuring transactional consistency and data integrity.
• Implement secure data isolation and access control in a multi-tenant environment.
• Refactor business logic and move it from frontend components into appropriate backend services.
• Develop and maintain unit, integration, and performance tests.
• Collaborate closely with Solution Architects, Data Engineers, DevOps Engineers, and QA teams.

Skills

Node.js

TypeScript

NestJS

REST APIs

Event-driven architecture

Kafka

Elasticsearch

PostgreSQL

Data Lake

Security

Tools

Kubernetes

OKD/OpenShift

Keycloak

pg-boss

Job description

Bytamic Solutions is seeking a Senior Backend Engineer to join an international project modernizing and stabilizing a large-scale enterprise platform serving over 1 million users. You will own backend modules built with Node.js, TypeScript, and NestJS in a Kubernetes environment, tackling performance, reliability, and security challenges.

You will design event-driven architectures with Apache Kafka, integrate Data Lake capabilities, optimize PostgreSQL, and implement robust testing.