SFox GmbH

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

4-6 years of experience is ok

Responsibilities

— Modernize legacy systems( C#) via redesign and refactoring.

— Build APIs with proper security and lifecycle governance.

— Collaborate with UX, product, and architecture teams.

— Optimize backend performance.

— Support public API documentation and governance.

Skills

— Strong ( C#) Jbackend capability.

— Experience with modernization and migration projects.

— Understanding of microservice and API design.

— Familiarity with CI/CD, linting, testing frameworks.

— Knowledge of security and performance patterns.

— Good collaboration across UX and backend teams.

In addition to this, if you have commercial experience with Java backend or React frontend — it will be a strong plus.

Recruitment steps:

• HR interview (30-45 min)
• Tehnical interview with live coding (40-45 min)
• Final client interview (30-45 min)
• Backround check
• Job Offer

The assignment is for between 26 to 32 months. You will work in a team of 9 engineers. The assignment is to migrate from monolith to microservices.

Important: the candidate must have worked/lived in Poland for the last 2+ years

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

For background check — you must be a taxpayer in Poland for 2+ years.

About us

RAW is a new studio with a conviction to create something that stands out in the sea of sameness. We develop innovative, easy-to-understand and highly entertaining slot games for the gaming industry. We were founded in March 2021, by well-known industry experts with strong investment backing.

 
At RAW iGaming, we believe in the fundamental principles of equality and diversity. We are committed to fostering an inclusive environment where everyone, regardless of gender, race, age, sexual orientation or beliefs, is respected and valued. This commitment is integral to our culture and drives our efforts to ensure equal opportunities and create a diverse and dynamic workforce.

Role Purpose

• Design and develop new backend features on a highly scalable and self-healing platform

• Help on the implementation of a state-of-the-art microservices architecture

• Research new technologies and take part of architectural decisions

• Work in a test-driven development environment

• Write code with performance, reliability, and maintainability in mind

• Perform functional requirements analysis

• Write high-quality code and documentation

• Work closely with other developers, QA, and product team members

• Apply analytical skills and be committed to quality

• Help track requests, issues, work progress, and any other changes using our project management tools

• Manage individual project priorities, deadlines, and deliverables

• Manage code changes and perform code reviews

Accountabilities include, but not limited to

• Design and Development

• Software Development

• Platform Development

Knowledge, Skills & Experience

• 4+ years of experience as a backend software engineer, and master Python or Go as a programming language

• You are familiar with DevOps practices and containerization technologies on cloud-based environments

• You have experience in distributed systems and micro service architectures

• You have a proven track record from working with heavy transactional systems

• You care about software quality; you care about software engineering, and you want to make a difference

• You have good attention to detail

• You can work with minimal supervision

• You have a good command of both verbal and written English

• Having a degree in Information Technology or another related field would be

considered an advantage

The budget for this role is 3000 - 3500 eur gross.

Benefits:

• 25 days paid vacation days
• paid public holidays
• Private health insurance (for candidates residing in Ukraine) 
• Additional marriage leave
• Additional paternity leave
• 5 days of paid sick leave
• Professional development support
• Department team building activities
• HR support

About us

RAW is a new studio with a conviction to create something that stands out in the sea of sameness. We develop innovative, easy-to-understand and highly entertaining slot games for the gaming industry. We were founded in March 2021, by well-known industry experts with strong investment backing.

 
At RAW iGaming, we believe in the fundamental principles of equality and diversity. We are committed to fostering an inclusive environment where everyone, regardless of gender, race, age, sexual orientation or beliefs, is respected and valued. This commitment is integral to our culture and drives our efforts to ensure equal opportunities and create a diverse and dynamic workforce.

Role Purpose

• Design and implement scalable, robust and reliable backend systems to support the live casino platform, ensuring they are secure and performant.

• Work closely with cross-functional teams including product owners, software developers, and QA engineers to deliver new features and functionality to the platform.

• Ensure that all backend systems are well-documented and well-tested, and that appropriate monitoring and alerting is in place to detect and resolve issues as they arise.

• Mentor and coach junior developers, helping them to grow their skills and knowledge in backend development, software engineering best practices and casino domain knowledge.

• Stay up-to-date with the latest trends, technologies and best practices in backend development, and actively apply them to improve the platform.

Accountabilities include, but not limited to

• Computer Science

• Software Development

• Programming

Knowledge, Skills & Experience

• At least 5 years of professional experience in backend development with a focus on high-availability, high-performance, scalable and secure systems.

• Knowledge and experience of the Live Casino Game Shows, or from a similar broadcasting application (dealing with streaming, camera switching, tally lights and similar) is highly considered.

• Proficiency in at least one backend programming language such as Java, Python or Go.

• Experience with databases such as PostgreSQL or MySQL, and caching systems such as Redis or Memcached.

• Experience with cloud infrastructure such as AWS or GCP, and containerization technologies such as Docker or Kubernetes.

• Strong understanding of software engineering principles, including design patterns, algorithms, and data structures.

• Excellent written and verbal communication skills, with the ability to collaborate effectively with cross-functional teams.

• A passion for software development and a desire to continuously learn and improve.

The budget for this role is 3000 - 3500 eur gross.

Benefits:

• 25 days paid vacation days
• paid public holidays
• Private health insurance (for candidates residing in Ukraine) 
• Additional marriage leave
• Additional paternity leave
• 5 days of paid sick leave
• Professional development support
• Department team building activities
• HR support

About us

RAW is a new studio with a conviction to create something that stands out in the sea of sameness. We develop innovative, easy-to-understand and highly entertaining slot games for the gaming industry. We were founded in March 2021, by well-known industry experts with strong investment backing.

 
At RAW iGaming, we believe in the fundamental principles of equality and diversity. We are committed to fostering an inclusive environment where everyone, regardless of gender, race, age, sexual orientation or beliefs, is respected and valued. This commitment is integral to our culture and drives our efforts to ensure equal opportunities and create a diverse and dynamic workforce.

Role Purpose

• Design and implement scalable, robust and reliable backend systems to support the live casino platform, ensuring they are secure and performant.

• Work closely with cross-functional teams including product owners, software developers, and QA engineers to deliver new features and functionality to the platform.

• Ensure that all backend systems are well-documented and well-tested, and that appropriate monitoring and alerting is in place to detect and resolve issues as they arise.

• Mentor and coach junior developers, helping them to grow their skills and knowledge in backend development, software engineering best practices and casino domain knowledge.

• Stay up-to-date with the latest trends, technologies and best practices in backend development, and actively apply them to improve the platform.

Accountabilities include, but not limited to

• Computer Science

• Software Development

• Programming

Knowledge, Skills & Experience

• At least 5 years of professional experience in backend development with a focus on high-availability, high-performance, scalable and secure systems.

• Knowledge and experience of the Live Casino Game Shows, or from a similar broadcasting application (dealing with streaming, camera switching, tally lights and similar) is highly considered.

• Proficiency in at least one backend programming language such as Java, Python or Go.

• Experience with databases such as PostgreSQL or MySQL, and caching systems such as Redis or Memcached.

• Experience with cloud infrastructure such as AWS or GCP, and containerization technologies such as Docker or Kubernetes.

• Strong understanding of software engineering principles, including design patterns, algorithms, and data structures.

• Excellent written and verbal communication skills, with the ability to collaborate effectively with cross-functional teams.

• A passion for software development and a desire to continuously learn and improve.

The budget for this role is 3000 - 3500 eur gross.

Benefits:

• 25 days paid vacation days
• paid public holidays
• Private health insurance (for candidates residing in Ukraine) 
• Additional marriage leave
• Additional paternity leave
• 5 days of paid sick leave
• Professional development support
• Department team building activities
• HR support

About us

RAW is a new studio with a conviction to create something that stands out in the sea of sameness. We develop innovative, easy-to-understand and highly entertaining slot games for the gaming industry. We were founded in March 2021, by well-known industry experts with strong investment backing.

 
At RAW iGaming, we believe in the fundamental principles of equality and diversity. We are committed to fostering an inclusive environment where everyone, regardless of gender, race, age, sexual orientation or beliefs, is respected and valued. This commitment is integral to our culture and drives our efforts to ensure equal opportunities and create a diverse and dynamic workforce.

Role Purpose

• Design and develop new backend features on a highly scalable and self-healing platform

• Help on the implementation of a state-of-the-art microservices architecture

• Research new technologies and take part of architectural decisions

• Work in a test-driven development environment

• Write code with performance, reliability, and maintainability in mind

• Perform functional requirements analysis

• Write high-quality code and documentation

• Work closely with other developers, QA, and product team members

• Apply analytical skills and be committed to quality

• Help track requests, issues, work progress, and any other changes using our project management tools

• Manage individual project priorities, deadlines, and deliverables

• Manage code changes and perform code reviews

Accountabilities include, but not limited to

• Design and Development

• Software Development

• Platform Development

Knowledge, Skills & Experience

• 4+ years of experience as a backend software engineer, and master Python or Go as a programming language

• You are familiar with DevOps practices and containerization technologies on cloud-based environments

• You have experience in distributed systems and micro service architectures

• You have a proven track record from working with heavy transactional systems

• You care about software quality; you care about software engineering, and you want to make a difference

• You have good attention to detail

• You can work with minimal supervision

• You have a good command of both verbal and written English

• Having a degree in Information Technology or another related field would be

considered an advantage

The budget for this role is 3000 - 3500 eur gross.

Benefits:

• 25 days paid vacation days
• paid public holidays
• Private health insurance (for candidates residing in Ukraine) 
• Additional marriage leave
• Additional paternity leave
• 5 days of paid sick leave
• Professional development support
• Department team building activities
• HR support

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Develop and execute automated UI & API test suites.
- Lead regression testing strategy and quality governance.
- Validate UI/UX behavior and accessibility.
- Collaborate with engineering teams on defect resolution.
- Maintain test documentation and test metrics.
- Support UAT, release readiness, and quality gates.
- Test cloud-native deployments and integrations.
Skills
- Strong automation testing experience (Playwright/WebDriver). - Understanding of regression and integration testing design.
- Knowledge of accessibility and UI validation.
- Familiarity with API testing tools (Postman, REST Assured).
- CI/CD test execution knowledge.
- Basic debugging & log analysis skills.
- Experience creating reusable test assets.

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

Why Poland?

The client has teams in the USA, Ireland, and Poland.

For background check — you must be a taxpayer in Poland for 2+ years.

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Develop high-quality Java microservices using Spring Boot.
- Build Kafka producers, consumers, and stream-processing apps.
- Design event-driven architectures with reliability and performance.
- Implement service resiliency patterns such as retries and circuit breakers. - Collaborate on distributed system design and integration.

• Ensure logging, tracing, and monitoring of backend services.

• Support performance tuning and root cause analysis.

   

• Skills
  - Strong in Java, Spring Boot, microservices patterns.
  - Hands-on Kafka development—streams, partitions, consumer groups. - Knowledge of distributed systems architecture.
  - Familiarity with Docker, cloud-native packaging.
  - Experience in REST APIs, schema evolution, and contracts.
  - Understanding of observability (logs, metrics, traces).
  - Good debugging and performance optimization skills.