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Remote Senior Quantitative Developer

Back to job offers
  • Remote or Hybrid at Cracow | Poland-based candidates
  • Very good English
  • Banking and Finance
  • Min 7 years of experience minimum
  • 22 000 zł to 30 000 zł per month in B2B

Your Mission 

For one of the largest North American banks to enhance and maintain its production libraries and applications. The bank serves 17 million clients worldwide and provides personal and commercial banking, wealth management, insurance, investor services, and capital markets products and services globally. The mission will be to work mainly with their capital markets teams, focusing on derivatives and fixed income systems.

Project description: We work on maintaining and enhancing a Risk management system for a big bank. The system is a core internal instrument for the data analyst and economist to make risk calculations. It is split into 3 layers:

  • Front end – Microsoft Excel with a fully custom set of function and menus; standalone Python app
  • Business Logic Library – C++ and Python modules on the network
  • Calculation grid – 50k computing grid running the simulations in house, AWS and Azure

Qualifications:

  • 5+ years of experience in software development, ideally in the quantitative finance area
  • Good knowledge of C++ and basic knowledge of Python
  • In-depth knowledge of various (vanilla and exotic) derivative products
  • Familiarity with mathematical models for the dynamics of the financial market
  • FpML knowledge is a plus
  • Numeracy to be able to understand quantitative finance
  • Commercial experience in financial or capital markets
  • Ability to use a version control system, ideally Git
  • Finding yourself in a large codebase
  • Good communication skills
  • Being open to code in other programming languages
  • Fluent in spoken and written English

Please note that the interview process is divided into four parts:

  1. Technical phone screening~30 minutes
  2. Technical interview~2 hours
  3. Non-technical call with hiring manager~45 minutes
  4. Optional: call with client for which you will be working 

They offer: 

  • Necessary equipment to work
  • Flexible working hours
  • Remote work possibility
  • Interesting, challenging and exciting work with international teams
  • English lessons with native speaker
  • Training Budget 
  •  Multisport card

Food, Health, Well-being, Additional:

  • Lunches from Kraków’s restaurants that are delivered both to the office and homes( or a refund of the budget allocated for it) 
  • Kitchen full of food, drinks, fruit, and snacks
  • Private medical insurance
  • Air-conditioning 
  • No dress code
  • The chillout area incudes comfortable bean bags, therapy balls, PlayStation 4 or Nintendo Switch + games stretching area and pull-up bar
  • Team events
  • Indoor parking place for bicycles
Contact us
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Julien Revillot

Associate Partner

For more than ten years, I’ve been driven by one idea — the future of Space and Defense depends on the people behind it. My career began in technical recruitment, where I had the privilege to hire engineers designing cutting-edge systems for aerospace and advanced manufacturing.

Co-founding Demexios was a natural next step: a way to transform my industry knowledge and relationships into a dedicated structure that helps clients recruit faster, smarter, and with strategic alignment.
Over time, I built long-term partnerships with companies leading technological sovereignty — from NewSpace startups developing electric propulsion to defense integrators modernizing tactical and surveillance systems. These collaborations allowed me to form a powerful network of decision-makers, project leaders, and experts who now trust Demexios to deliver when precision truly matters.
Today, my role is not just to connect candidates and companies — it’s to ensure that every hire strengthens our clients projects.

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Matthieu Konarzewski

Associate Partner

I’ve built my career in sales and recruitment across several industries space, tech, healthcare, and defense. I’ve always been drawn to innovation and the talented people who turn ideas into reality. Over the years, I’ve learned how much a motivated and skilled team can define a company’s success and how the right people will shape the future of the New Space and defense industries.

My international background has allowed me to work with both startups and global organizations, helping them identify individuals who truly fit their culture and business goals. This combination of experience in technology and talent acquisition naturally led to the creation of Demexios.

At Demexios, our mission is simple: to connect experts with the companies that need their skills particularly in the defense and space sectors. I firmly believe that no ambitious project can succeed without a skilled and cohesive team driving it forward.

My commitment is to be a trusted partner for our clients, supporting them step by step in building strong, high-performing teams that deliver tangible results whether their ambitions lie on Earth or beyond.