TypeScript Developer (Nest.js) – Remote

Poland

Overview

Our company is a forward-thinking, innovative startup committed to building the next generation of secure, multi-functional crypto solutions, designed to meet the demands of a rapidly evolving digital landscape. While we embrace the energy and agility of a modern startup, our approach to quality and security is built on a foundation of reliability and industry best practices. Our focus on robust technology, data protection, and seamless user experience ensures that we consistently deliver dependable products that our users and partners can trust.

At our company, we believe that our team is our greatest asset. Here are just a few benefits of joining our team:

  1. Growth Opportunities: We are invested in the personal and professional development of our team members
  2. Innovation at the Forefront: Working with us means being part of pioneering projects in blockchain, crypto security, and decentralized finance. You’ll be part of a team that’s passionate about driving change in the tech space, with the resources and freedom to bring your ideas to life.
  3. Impactful Work: As a key contributor to our team, your work will have a direct impact on the success of our products and the satisfaction of our users. You’ll play a vital role in shaping the future of secure digital finance.

By joining our company, you’ll experience the thrill of a startup environment with the confidence that you’re backed by a team committed to reliability, excellence, and long-term success. Together, we’re building the future — one secure transaction at a time.

Main Responsibilities

As a Backend Developer, you’ll design and maintain secure, scalable APIs using TypeScript (NestJS) and manage PostgreSQL databases with TypeORM. You’ll integrate multiple blockchain networks, handle secure key management, and optimize database performance. You’ll implement microservices architecture, manage third-party API integrations for payments, crypto exchanges, and KYC services, and ensure robust testing, logging, and monitoring

Mandatory Requirements

– TypeScript expertise, especially with NestJS for building RESTful APIs
– Experience with TypeORM
– Proficiency in PostgreSQL for database design, SQL optimization, and performance tuning
– Understanding of API Security (JWT, OAuth) and data encryption

Blockchain Integration
– Familiarity with blockchain basics and concepts
– Experience with Web3.js or Ethers.js for blockchain interaction
– Knowledge of private key management and multi-signature wallets

System Design & Architecture
– Experience with microservices and scalable system design
– Familiarity with event-driven architecture and message brokers
– Understanding of database transactions and query optimization

Third-Party Integrations
– Integrating payment gateways
– Experience with crypto exchanges (Binance, Coinbase Pro)
– Familiarity with market data APIs (CoinGecko, CryptoCompare)
– Knowledge of KYC/AML service

Experience
– 3-5 years in backend development, with 2+ years using TypeScript/NestJS
– Experience in blockchain projects is a plus

– Vacation Days: We offer 20 days of paid vacation per year, allowing our team to recharge and maintain a healthy work-life balance
– Sick Days: Employees have 5 paid sick days annually to take the necessary time off for health and wellness
– Overtime: While we strive to maintain a balanced workload, any overtime is compensated at a premium rate or offered as additional time off, depending on employee preference