Intern - Backend Development

Connecting clients to markets – and talent to opportunity

With 4,500 employees and over 400,000 retail and institutional clients from more than 80 offices spread across five continents, we're a Fortune-100, Nasdaq-listed provider, connecting clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

At StoneX, we offer you the opportunity to be part of an institutional-grade financial services network that connects companies, organizations, and investors to the global markets ecosystem. As a team member, you'll benefit from our unique blend of digital platforms, comprehensive clearing and execution services, personalized high-touch support, and deep industry expertise. Elevate your career with us and make a significant impact in the world of global finance.

StoneX Internship

Are you looking to gain real world experience in an entrepreneurial culture? Consider an internship at a thriving global financial services firm and launch your career with StoneX A StoneX Internship will provide development, support, career growth, and an endless array of opportunities. You can expect to make an impact on the business and experience a career defining internship program.

Internship Perks:

In addition to the real-world experience, you'll gain at StoneX, we're excited to offer interns several perks which include the following:

• Compensation: All interns are paid at a competitive rate. 
• Socials: Networking and acclimation to the company, office, and city are important aspects of the internship program. Socials and local favorites are planned at various points, with large events at the beginning and end of your internship. 
• Access to Senior Leaders: Senior leaders are involved in the internship program from day one, delivering trainings, presenting on firm business, weekly leadership calls, and even attending socials.
• Training: Virtual and in-person trainings to get interns onboarded and connected with the company globally.
• Mentorship: Interns have a mentor and buddy to help answer any questions and work alongside during your internship.

Primary duties will include: 

• Execute on the software development life cycle (SDLC) for the team including estimating, analysis, code design, development, testing, debugging, and maintenance
• Work closely with product owners to understand product requirements and translate them into technical stories
• Review and give constructive feedback on code
• Forward thinking on modern technology and the payments industry
• This list of duties and responsibilities is not intended to be all-inclusive and can be expanded to include other duties or responsibilities that management deems necessary

Technical skills:

• Front-End: React
• Backend: C#, Mongo DB, .Net

• Architecture: microservices, data streaming

• Cloud: Azure

StoneX Essential Qualifications

• Ability to maintain confidentiality and appropriately handle sensitive information with tact and discretion
• Sound verbal/written communication abilities
• Effective interpersonal skills
• Sense of urgency
• Honesty, curiosity, and tenacity
• Strong work ethic and emphasis on attention to detail
• The confidence to fail

       Early Careers Requirements

• Pursuing a Bachelor's or Master's degree from an accredited university in a relevant program and graduating between December 2026 and August 2027 (entering penultimate year of university)
• Available for a July 2026 start date for a 13-week program
• Proficiency with Microsoft Office suite (preferably Excel)
• Must be authorized to work in Poland for any employer

Working environment

Hybrid with minimum of 4 days in the office.