Tech Lead & Senior Backend Engineer — Node.js/TS

EasySoftGroup; Polska; Hybrid; PLN 300,000 - 460,000; Full time

Job summary

EasySoftGroup is seeking a Tech Lead/Senior Backend Engineer for a client at the intersection of fintech, AI, and digital asset infrastructure. You will join a highly skilled team building backend systems where scalability and reliability are critical.

Responsibilities include designing and maintaining Node.js/TypeScript services, APIs, and data models; working with MongoDB, Redis, and AWS; and shaping architecture for high-load, scalable platforms.

Qualifications

• Degree in Computer Science, Mathematics, or a related technical field.
• 7+ years of commercial backend development experience.
• Strong expertise in Node.js and TypeScript.
• Hands-on experience with MongoDB and Redis.
• Proven track record of building and supporting high-load production systems.
• Solid understanding of backend architecture, API design, and scalable system design principles.
• Hands-on experience with infrastructure setup, configuration, and support in cloud environments.
• Experience contributing to architectural decisions for scalable and reliable backend systems.

Responsibilities

• Design, develop, and maintain backend services using Node.js and TypeScript.
• Build and enhance APIs, data models, and core platform components.
• Work with MongoDB, Redis, and AWS cloud services.
• Design, build, and maintain high-load backend systems capable of handling large-scale traffic and ensuring high availability.
• Participate in the setup, configuration, and ongoing support of cloud infrastructure to ensure reliability, scalability, and operational efficiency.
• Contribute to improving deployment processes, monitoring, logging, and alerting for backend services and production environments.
• Troubleshoot and resolve production issues while ensuring system stability and performance.
• Optimize applications for scalability, reliability, and maintainability.
• Participate in technical discussions and contribute to architectural decisions around backend services, infrastructure, and platform scalability.

Skills

Node.js

TypeScript

Backend architecture

Cloud infrastructure

Debugging

Independence

Ownership

Education

Bachelor's degree in CS or related

Tools

MongoDB

Redis

AWS

Job description

EasySoftGroup is seeking a Tech Lead/Senior Backend Engineer for a client at the intersection of fintech, AI, and digital asset infrastructure. You will join a highly skilled team building backend systems where scalability and reliability are critical.

Responsibilities include designing and maintaining Node.js/TypeScript services, APIs, and data models; working with MongoDB, Redis, and AWS; and shaping architecture for high-load, scalable platforms.