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Middle Backend Engineer
About On The Spot
About the team
Finonex is a company that develops innovative and advanced online financial trading platforms. They focus on creating accessible, secure, and user-friendly trading experiences powered by cutting-edge technology, supported by 24/7 service.
Step into the world, where advanced technologies take center stage, transforming the online trading experience. With the cutting-edge approach, we follow edge & new methodologies, constantly pushing boundaries. We offer an excellent work environment where you will be challenged and encouraged to grow professionally.
About the role
We’re looking for a Middle Backend Engineer to turn ideas into clean, reusable code, improve development workflows, and help build smooth user experiences in an Agile environment.
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Responsibilities
- Collaborate with the design team to translate wireframes and mockups into functional components, ensuring seamless user experiences
- Develop and maintain reusable and efficient code libraries to streamline the development process
- Participate in code reviews, providing constructive feedback and ensuring code quality and adherence to best practices
- Contribute to the continuous improvement of our Agile development process, including CI/CD pipelines and automated testing
Requirements
- 3–5 years of professional experience using Node.js and C#
- At least 2 years of hands-on experience with MSSQL, PostgreSQL, Redis, or MongoDB
- Minimum 1 year of practical experience with AWS, Azure, or Google Cloud Platform (GCP)
- Proven experience managing high-scale production environments, including performance tuning and scalability
- Strong background in developing RESTful APIs and web applications using frameworks like Express
- Solid understanding of Agile methodologies, including CI/CD pipelines and automated testing strategies
- Experience with message queues or event streams such as RabbitMQ or Kafka
- Excellent verbal and written communication, with strong interpersonal skills for effective collaboration
- Ability to work independently, take initiative, and own projects from concept to delivery
- Comfortable working in Windows or Linux environments, and with container technologies like Docker
- Familiarity with designing and building event-driven microservices architectures
- Bachelor's degree in Computer Science or related field
Benefits
- Work in a highly professional team. Informal and friendly atmosphere in the team
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable office in Warsaw at Prosta 51
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- Flexible working hours — we care about you (!) and your output
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
To be considered for this position, you must have Polish citizenship, a D-type work visa, or a residence permit. Thank you!
Contribute to our growth
Know someone perfect for this role? Let us know about them. We have a referral program to recognize your support.
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