Your role and impact:

In your role at WhiteTech, you'll be at the heart of our mission to revolutionize payments worldwide. Your expertise will be critical in analysing data, processes, and code to identify, resolve or prevent issues and drive product improvements. You will contribute to developing a secure, well-tested and high-performing product, setting new standards in the fintech industry.

Your key responsibilities will include:

• Designing, developing, testing, documenting, releasing and supporting software from scratch.
• Enhancing and refining our existing API and backend systems.
• Integrating third-party solutions to broaden our payment ecosystem (acquirer, gateway, alternative payment methods, token platforms, systems for verification/scoring/monitoring of customer operations, reporting, etc.).
• Running tests to make sure everything works as it should and setting up a testing environment for checking new features.
• Fixing existing bugs and debugging the developed software.
• Preparing necessary technical documentation.
• Provide support for the implemented software in production
• Collaborating with the front-end developers and other team members to complete all of the above tasks in the most efficient way.
• This role is about improving our products and solving problems, so we're looking for someone with excellent troubleshooting skills, curiosity for innovations and unconventional solutions.

What makes you stand out:

• Understanding of best practices for optimizing code and web products in PHP, working with caching, asynchrony. Knowledge of best practices for developing and supporting large-scale projects.
• Deep understanding of OOP
• Deep understanding of Symfony. Proficient in designing and implementing RESTful APIs using Symfony. Proficient in Doctrine ORM.
• Relational Database Management (PostgreSQL). Proficiency in optimizing complex SQL queries for performance using techniques such as query rewriting, indexing strategies, and query execution plans. 
• Proficient in designing database schemas, including normalization techniques, entity-relationship modeling, and schema design best practices.
• Understanding the inner workings of Kubernetes, Docker and its components such as Docker Engine, Docker Hub, Docker Swarm.
• Deep SOLID, GRASP understanding. Deep understanding of a broad range of design patterns, including their motivations, structures, and implementations.
• Knowledge of advanced DDD concepts such as Domain Events, Domain Services, Bounded Contexts. Ability to design a domain model for complex business problems and use it to solve real problems. Understanding the importance of application context and developing Bounded Contexts to separate domain models.
• Advanced understanding of CQRS principles and benefits, including asynchronous command processing, data synchronization between read and write models. Experience using design patterns and architectural patterns to implement an effective CQRS-based architecture.
• Advanced knowledge of professional architecture design practices. Experience designing and developing complex, large systems using architectural templates and patterns. Ability to define and document architectural solutions and solve problems related to system complexity and scalability.
• Advanced knowledge of PHP integration test automation tools and libraries such as PHPUnit, Codeception, Behat. Ability to design and structure integration tests for large and complex systems with a large number of interacting components. Knowledge of the process of setting up test environments and managing dependencies for effective integration tests.
• Advanced knowledge of the process of development and deployment of systems built on the basis of Event Sourcing. Ability to design the architecture of the application using Event Sourcing, taking into account the requirements for the required capacity and scalability.
• Advanced knowledge of microservices design and deployment processes, including configuration management, monitoring, and logging.
• Advanced knowledge of Jenkins functionality, including advanced configuration capabilities such as parameterization, plugins, additional tools.

Our recruitment process typically follows these stages:

1. Application screening
2. Interview Stages (2-3 weeks):
   • Prescreening call (40 min)
   • Technical Interview (60 min)
   • Soft Skills Interview (40 min)
3. Job Offer

Your role and impact:

We are looking for PHP Developer with hands-on experience in anti-fraud systems and SEON integration. We expect a high level of ownership and deep technical involvement in building fraud prevention solutions.

Your key responsibilities will include:

• Work with SEON as a product, not just at the API level
• Design and implement fraud detection and prevention flows
• Work with risk signals, rules, scoring, and decision-making logic
• Build and maintain anti-fraud orchestration within complex systems
• Make independent technical decisions on how and where to integrate SEON checks
• Understand the difference between simple provider integration and building a full fraud-control layer

Requirements

• 4+ years of commercial experience with PHP
• Solid hands-on experience integrating SEON into production systems
• Experience building antifraud / risk / security-related flows
  
  

Strong understanding of:

• REST APIs and webhooks
• Asynchronous processing
• Queues and event-driven architecture
• Transactional consistency
• Retry / timeout / fallback patterns
• Idempotency
• Observability (logging, tracing, monitoring)
• Experience with Symfony or another modern PHP framework
• Good knowledge of SQL and transactional systems
• Ability to work with external provider documentation and turn it into production-ready solutions
• Ability to work independently in environments with incomplete requirements and complex domain logic
  
  

SEON-Specific Experience (Required)

• Integration of SEON API into critical business flows
• Experience with transaction screening, device intelligence, and email/phone/IP enrichment
• Building logic based on SEON rules, scoring, and signals
• Working with manual review and case management flows
• Experience integrating SEON in fintech / payments / high-risk environments
• Ability to adapt SEON to different use cases beyond basic integration
• Understanding how to reduce false positives / false negatives through proper system design
  
  

Nice to Have

• Experience in fintech, payments, acquiring, wallets, or payouts
• Experience integrating KYC / AML providers
• Experience building risk engines or orchestration layers
• Experience with microservices architecture
• Knowledge of DDD, CQRS, and event-driven architecture
• Experience with RabbitMQ, Kafka, or SQS
• Understanding of authentication, identity, trusted devices, and SCA / step-up verification

Our recruitment process typically follows these stages:

1. Application screening
2. Interview Stages (2-3 weeks):
   • Prescreening call (40 min)
   • Technical Interview (60 min)
   • Soft Skills Interview (40 min)
3. Job Offer

Your role and impact:

In your role at WhiteTech, you'll be at the heart of our mission to revolutionize payments worldwide. Your expertise will be critical in analysing data, processes, and code to identify, resolve or prevent issues and drive product improvements. You will contribute to developing a secure, well-tested and high-performing product, setting new standards in the fintech industry.

Your key responsibilities will include:

• Designing, developing, testing, documenting, releasing and supporting software from scratch.
• Enhancing and refining our existing API and backend systems.
• Integrating third-party solutions to broaden our payment ecosystem (acquirer, gateway, alternative payment methods, token platforms, systems for verification/scoring/monitoring of customer operations, reporting, etc.).
• Running tests to make sure everything works as it should and setting up a testing environment for checking new features.
• Fixing existing bugs and debugging the developed software.
• Preparing necessary technical documentation.
• Provide support for the implemented software in production
• Collaborating with the front-end developers and other team members to complete all of the above tasks in the most efficient way.
• This role is about improving our products and solving problems, so we're looking for someone with excellent troubleshooting skills, curiosity for innovations and unconventional solutions.

What makes you stand out:

• Understanding of best practices for optimizing code and web products in PHP, working with caching, asynchrony. Knowledge of best practices for developing and supporting large-scale projects.
• Deep understanding of OOP
• Deep understanding of Symfony. Proficient in designing and implementing RESTful APIs using Symfony. Proficient in Doctrine ORM.
• Relational Database Management (PostgreSQL). Proficiency in optimizing complex SQL queries for performance using techniques such as query rewriting, indexing strategies, and query execution plans. 
• Proficient in designing database schemas, including normalization techniques, entity-relationship modeling, and schema design best practices.
• Understanding the inner workings of Kubernetes, Docker and its components such as Docker Engine, Docker Hub, Docker Swarm.
• Deep SOLID, GRASP understanding. Deep understanding of a broad range of design patterns, including their motivations, structures, and implementations.
• Knowledge of advanced DDD concepts such as Domain Events, Domain Services, Bounded Contexts. Ability to design a domain model for complex business problems and use it to solve real problems. Understanding the importance of application context and developing Bounded Contexts to separate domain models.
• Advanced understanding of CQRS principles and benefits, including asynchronous command processing, data synchronization between read and write models. Experience using design patterns and architectural patterns to implement an effective CQRS-based architecture.
• Advanced knowledge of professional architecture design practices. Experience designing and developing complex, large systems using architectural templates and patterns. Ability to define and document architectural solutions and solve problems related to system complexity and scalability.
• Advanced knowledge of PHP integration test automation tools and libraries such as PHPUnit, Codeception, Behat. Ability to design and structure integration tests for large and complex systems with a large number of interacting components. Knowledge of the process of setting up test environments and managing dependencies for effective integration tests.
• Advanced knowledge of the process of development and deployment of systems built on the basis of Event Sourcing. Ability to design the architecture of the application using Event Sourcing, taking into account the requirements for the required capacity and scalability.
• Advanced knowledge of microservices design and deployment processes, including configuration management, monitoring, and logging.
• Advanced knowledge of Jenkins functionality, including advanced configuration capabilities such as parameterization, plugins, additional tools.

Our recruitment process typically follows these stages:

1. Application screening
2. Interview Stages (2-3 weeks):
   • Prescreening call (40 min)
   • Technical Interview (60 min)
   • Soft Skills Interview (40 min)
3. Job Offer

Your role and impact:

In your role at WhiteTech, you'll be at the heart of our mission to revolutionize payments worldwide. Your expertise will be critical in analysing data, processes, and code to identify, resolve or prevent issues and drive product improvements. You will contribute to developing a secure, well-tested and high-performing product, setting new standards in the fintech industry.

Your key responsibilities will include:

• Designing, developing, testing, documenting, releasing and supporting software from scratch.
• Enhancing and refining our existing API and backend systems.
• Integrating third-party solutions to broaden our payment ecosystem (acquirer, gateway, alternative payment methods, token platforms, systems for verification/scoring/monitoring of customer operations, reporting, etc.).
• Running tests to make sure everything works as it should and setting up a testing environment for checking new features.
• Fixing existing bugs and debugging the developed software.
• Preparing necessary technical documentation.
• Provide support for the implemented software in production
• Collaborating with the front-end developers and other team members to complete all of the above tasks in the most efficient way.
• This role is about improving our products and solving problems, so we're looking for someone with excellent troubleshooting skills, curiosity for innovations and unconventional solutions.

What makes you stand out:

• Understanding of best practices for optimizing code and web products in PHP, working with caching, asynchrony. Knowledge of best practices for developing and supporting large-scale projects.
• Understanding of OOP
• Deep understanding of Symfony. Proficient in designing and implementing RESTful APIs using Symfony. Proficient in Doctrine ORM.
• Relational Database Management (PostgreSQL). Proficiency in optimizing complex SQL queries for performance using techniques such as query rewriting, indexing strategies, and query execution plans. 
• Proficient in designing database schemas, including normalization techniques, entity-relationship modeling, and schema design best practices.
• Understanding the inner workings of Kubernetes, Docker and its components such as Docker Engine, Docker Hub, Docker Swarm.
• SOLID, GRASP understanding. Deep understanding of a broad range of design patterns, including their motivations, structures, and implementations.
• Knowledge of advanced DDD concepts such as Domain Events, Domain Services, Bounded Contexts. Ability to design a domain model for complex business problems and use it to solve real problems. Understanding the importance of application context and developing Bounded Contexts to separate domain models.
• Understanding of CQRS principles and benefits, including asynchronous command processing, data synchronization between read and write models. Experience using design patterns and architectural patterns to implement an effective CQRS-based architecture.
• Knowledge of professional architecture design practices. Experience designing and developing complex, large systems using architectural templates and patterns. Ability to define and document architectural solutions and solve problems related to system complexity and scalability.
• Advanced knowledge of PHP integration test automation tools and libraries such as PHPUnit, Codeception, Behat. Ability to design and structure integration tests for large and complex systems with a large number of interacting components. Knowledge of the process of setting up test environments and managing dependencies for effective integration tests.
• Advanced knowledge of the process of development and deployment of systems built on the basis of Event Sourcing. Ability to design the architecture of the application using Event Sourcing, taking into account the requirements for the required capacity and scalability.
• Advanced knowledge of microservices design and deployment processes, including configuration management, monitoring, and logging.
• Advanced knowledge of Jenkins functionality, including advanced configuration capabilities such as parameterization, plugins, additional tools.

Our recruitment process typically follows these stages:

1. Application screening
2. Interview Stages (2-3 weeks):
   • Prescreening call (40 min)
   • Technical Interview (60 min)
   • Final Interview (40 min)
3. Job Offer