Senior Node.js Developer

Alty Inc; Polska; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Flexible start times

Healthy work-life balance

Mental health support

Speaking Club and English lessons

Volunteer projects

Office in Kyiv

Pets allowed at office

Professional growth

No bureaucracy

Job summary

Alty Inc in Poland is seeking an experienced backend developer to join our team building scalable web and mobile platforms for fintech, crypto, banking and more. You will develop the backend from scratch, integrate third party services, and help shape architecture with Nest.js, Node.js, PostgreSQL/MySQL, and AWS in a high-load environment.

We value hands-on AI tool usage, REST APIs, Git workflows, design patterns and SOLID principles.

Qualifications

• At least 4 years of commercial backend development experience.
• 2+ years Node.js development.
• Experience with AI tools and technologies in software development.
• Experience with enterprise-level products or complex business systems.
• Strong experience with APIs and integrating third-party services and systems.
• Experience with REST.
• Experience using Git.
• Design patterns, OOP, SOLID.

Responsibilities

• Develop the backend part for a new web and mobile platform from scratch.
• Contribute to all phases of the software development lifecycle.

Skills

Backend development

Node.js

API integration

REST API

Git

Design patterns

OOP

SOLID

Tools

Nest.js framework

PostgreSQL

MySQL

AWS

WebSocket

Temporal.io

Postman

Job description

For 17 years, Alty has reached the top lists of mobile and desktop application developers for fintech, crypto, retail, banking, and tourism. Our professional expertise in UI/UX design, mobile, and web development of high-load applications used by millions of users worldwide. You know us for sure if you use Monobank, Privat24 for Business, ZakazUA, EasyPay, Kashable, or Sfera Living System. We also have a partnership with Visa and Mastercard. Our clients are enterprises and corporations that recommend us to partners. We put the customer at the heart of all we do and achieve our best together. Join us!

Requirements

• At least 4 years of commercial experience in backend development.
• 2+ years experience in Node.js development.
• Hands-on experience using AI tools and technologies in software development.
• Experience working on enterprise-level products or complex business systems.
• Strong experience working with APIs and integrating third-party services and systems.
• Experience with REST.
• Experience using Git.
• Design patterns, OOP, SOLID.

Technologies

• Node.js
• Nest.js framework
• RDBMS (PostgreSQL, MySQL, etc.) — (db instruments and stored procedure)
• High load systems and performance
• Workflow management (Temporal.io etc.)
• AWS
• Web socket
• Postman
• AI tools and technologies

Nice to have

• Experience with CI/CD setup (GitlabCI)
• Knowledge of Nest.js, Kafka, and Temporal.io

Responsibilities

• Develop the backend part for a new web and mobile platform from scratch.
• Contribute to all phases of the software development lifecycle.

What we offer for you to succeed

• Warm and friendly working environment with flexible start (from 8:00 to 11:00) based on personal preferences and team meetings.
• We put a healthy work-life balance first.
• Caring for physical and mental health — compensation of a psychologist and sports to choose from.
• Speaking Club and English with a teacher.
• Volunteer projects that help the state get closer to victory.
• Ability to work from one of our offices in Kyiv. And you are more than welcome to bring your pets to the office.
• A space to grow both professionally and personally. A wide variety of exciting projects, the best hardware for your work, performance reviews, educational workshops, and team coaching.
• No tiresome bureaucracy. If you need something — just ask and get it.

Our employees describe working here as a welcoming, collaborative, and impactful experience. If you are a creative and energetic person, we cannot wait to see you on board!