PHP Developer (SEON / Anti-Fraud)

At WhiteTech, we empower businesses in the financial ecosystem with cutting-edge white-label and SAAS solutions. Our comprehensive suite of tools is tailored for EMI, PSP, e-commerce, and open banking platforms. With WhiteTech, clients gain access to a platform designed for flexibility, scalability, and seamless integration. Our mission is to help businesses unlock their full potential in a rapidly evolving financial landscape. Whether scaling your PSP, enhancing your EMI services, or diving into open banking, WhiteTech is your partner for innovation and growth. We are a remote-first technology company and welcome applications from candidates across Europe, including the EEA, the UK, Switzerland, and other non-EEA European countries such as Ukraine, Moldova, Georgia, Armenia, Montenegro, Turkey, and the Western Balkans. We also consider applicants from different locations who can work within Central European Time (CET). 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: Application screening Interview Stages (2-3 weeks): Prescreening call (40 min) Technical Interview (60 min) Soft Skills Interview (40 min) Job Offer We offer: Competitive compensation package (commensurate with your experience) 19 business days of flexible Paid Time Off (PTO) Fully remote work with flexible hours (within the CET time zone) from any location of your choice Values-driven culture with a friendly and supportive work environment Opportunity to regularly participate in conferences and community events as both a participant and contributor Matrix organizational structure designed to streamline communication, remove barriers, and promote efficiency E…