JustJoin.IT Hybrydowo Senior

Senior Fullstack Engineer (.NET / Node.js + React)

Yard Corporate

⚲ Warszawa

35 000 - 40 000 PLN brutto (UoP)

Wymagania

  • .NET C#
  • Node.js
  • React
  • MS SQL Server
  • T-SQL

Opis stanowiska

About the Role & Project
We are recruiting for a leading global alternative investment firm (Hedge Fund) that is modernizing capital markets.
We are not looking for a traditional, single-stack developer. We need a Senior Fullstack Engineer who comfortably bridges the gap between robust enterprise systems and cutting-edge cloud/AI solutions. You will join an agile tech team building high-performance platforms where your code directly impacts complex, global financial systems.

Tech Stack


Backend: C# / .NET, Node.js
• Frontend: ReactJS (with occasional legacy AngularJS maintenance)
• Data: SQL Server, T-SQL
• Architecture: Cloud, Containers, Data Streaming

Key Responsibilities


End-to-End Dev: Design and scale server-side apps (Node.js/.NET) and build responsive UIs (React).

• Data & Perf: Optimize high-throughput SQL Server stored procedures for financial data.
• Modernization: Leverage streaming and cloud technologies to build resilient, distributed platforms.
• Architecture: Take an active role in tech design reviews, architecture discussions, and mentoring.

Requirements


7+ years of professional full-stack development experience.

• Hands-on mastery of C#/.NET, Node.js, React, and T-SQL.
• Engineering standards: Strong analytical skills, clean code mindset, and solid application design focus.
• Communication: Excellent English skills to collaborate smoothly with international teams.

Bonus Points:
• Experience or interest in integrating AI/ML models into enterprise apps.
• Prior background in FinTech, banking, or trading environments.

What We Offer
• Financial & Future: Private pension scheme, life & travel insurance, educational assistance reimbursement.
• Health & Wellness: Premium medical & dental package (with vision allowance) + MultiSport card.
• Culture & Perks: Pre-funded lunch card, Employee Assistance Program, volunteer opportunities, and active DEI affinity groups.

If interested, please click apply! :)

🔍 Dekoder Ogłoszenia

🔴
modernizing capital markets
Może oznaczać zarówno innowacyjne projekty, jak i konieczność pracy z przestarzałymi systemami, które są w trakcie modernizacji.
🔴
comfortably bridges the gap between robust enterprise systems and cutting-edge cloud/AI solutions
Może oznaczać konieczność pracy zarówno z bardzo starymi, jak i nowymi technologiami, co wymaga dużej elastyczności i adaptacji.
🔴
occasional legacy AngularJS maintenance
Choć główny nacisk jest na React, będziesz musiał zajmować się starszym kodem, co może być czasochłonne i frustrujące.
🟡
Optimize high-throughput SQL Server stored procedures for financial data
Oznacza pracę z bardzo dużymi ilościami danych i potencjalnie skomplikowanymi zapytaniami, które wymagają głębokiej optymalizacji.
🟢
Take an active role in tech design reviews, architecture discussions, and mentoring
Oczekuje się od Ciebie nie tylko kodowania, ale także aktywnego udziału w procesach decyzyjnych i wspierania młodszych kolegów.