Senior PHP Backend Engineer

Coinspaid Dev is the engineering brand behind the technology, infrastructure, and R&D expertise built within Coinspaid. With more than 120 engineers and over 11 years of industry experience, Coinspaid Dev brings together software engineering, infrastructure, security and R&D teams with experience building distributed systems and blockchain infrastructure operating across more than 20 blockchain networks. Coinspaid Dev emerges as an independent engineering brand with a straightforward mission: to advance blockchain infrastructure engineering and contribute practical expertise back to the industry. The structure is new. The experience behind it is not. Responsibilities:Collaborate with cross-functional and cross-domain teams to gather requirements, design solutions, and deliver featuresDesign, develop, and maintain backend systems using PHP and MySQL(or similar), ensuring they are scalable and maintainableImplement and optimize complex features with a focus on clean, reusable, and efficient codeWrite unit tests to ensure the reliability and scalability of codeParticipate in code reviews, architecture discussions, and ensure adherence to best practices in software developmentMonitor and troubleshoot production systems, ensuring the highest levels of availability, performance, and securityShare on-call duties with the team to ensure smooth operations of the systems in productionStay updated with new technologies and trends, and introduce them where appropriate to enhance system performance and maintainability Requirements:Experience (5+ years) in object-oriented PHP and modern PHP toolsSoftware design principles (SOLID, KISS, DRY) and layered architectureApplied DDD practices: bounded contexts, aggregates, domain eventsGood knowledge of the latest versions of Laravel frameworkStrong understanding of relational databases like MySQL/PostgreSQL including transaction managementExperience in database query optimization, analysing deadlocks and db performanceMessage-driven services in production with Apache Kafka or a comparable brokerHandling money in application code: exact arithmetic, explicit rounding rules, multi-currency precision, idempotent money-moving operationsSecurity best practicesExperience with monitoring tools (Prometheus, Grafana or similar)Working with Docker/Docker Compose/Kubernetes on a daily basisGood level of spoken and written English (B1+) and Russian Nice to have:Experience with GoFintech, payments, or crypto domain experienceHigh-load Why join CryptoProcessing by CoinspaidYou’ll be joining a company that is actively shaping its space – with enough scale to matter and enough room to make an impact.At Coinspaid, people are expected to think, contribute, and take ownership – and are supported in doing so.We focus on flexibility, wellbeing, and long-term growth – without overcomplicating how benefits work. Flexible Benefits Benefit Bar – up to €230/monthA flexible monthly budget you can use for what matters most to you – from sports and mental health to coworking, home office, or medical-related expenses. Work & FlexibilityFully remote work from almost anywhereOptional offices and relocation supportFlexible, async-friendly environment Growth & LearningBudget for courses, certifications, and professional developmentLanguage learning supportCross-team learning and knowledge sharing Wellbeing & SupportMedical insurance or reimbursement depending on locationAccess to mental health supportFinancial support for important life events ExtrasMerch shop with rewards systemTeam offsites and company events Sounds good? Well then, we can’t wait to see your resume!To learn more please visit: https://coinspaid.com/about-us/ & https://coinspaid.com/careers/