Senior Fullstack Software Engineer (NodeJS)

• Position: Senior Fullstack Software Engineer (NodeJS)

• Employment: B2B

• Working model: Remote

We’re looking for an experienced and proactive Senior Fullstack Software Engineer to take ownership of developing and maintaining Visual Studio Code extensions for our proprietary programming language used in high-frequency trading (HFT) algorithm development.

Your job will be to create a seamless development experience for our quant and trading teams, integrating editor tools with internal build and test infrastructure. Future work may include real-time market data analysis tooling, strategy diagnostics, and custom visualizations. You’ll be working at the intersection of performance, finance, and developer experience.

Responsibilities:

• Design, develop, and maintain VS Code extensions for an internal programming language

• Integrate the language tooling with internal build/test systems

• Potentially develop tools for real-time data analysis, strategy diagnostics, and visualization

• Collaborate with quant researchers, traders, and infrastructure engineers

• Solve complex engineering problems in a high-performance environment

Requirements:

• 5+ years of professional experience in software engineering (full stack/frontend/backend)

• Strong knowledge of TypeScript and Node.js

• Ability to write clean, maintainable, and efficient code

• Bonus points for experience with:

  • Visual Studio Code Extension API

  • Language Server Protocol (LSP)

• Solid understanding of JavaScript fundamentals, including:

  • Prototypal inheritance

  • Event loop, call stack, and task queue

  • Promises vs callbacks

• Bonus: experience with algorithmic trading or HFT systems

• Independent, structured, and delivery-oriented mindset

The offer:

• Salary up to 25 000 PLN/ month

• Attractive salary

• Bonuses – 2 times a year, based on the financial result of the company and the performance of a given person. Depending on the level in the classification system and seniority, bonuses can range from 35%-75% of the annual salary. They are not guaranteed, but in the company’s 15-year history, there have only been 2 half-years without bonuses

• Ok System and LuxMed – both packages offered by the company for both employees and consultants on b2b contracts

• Paid break in the provision of services – for consultants, 20 days of break in a year, fully paid.