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 features Design, develop, and maintain backend systems using PHP and MySQL(or similar), ensuring they are scalable and maintainable Implement and optimize complex features with a focus on clean, reusable, and efficient code Write unit tests to ensure the reliability and scalability of code Participate in code reviews, architecture discussions, and ensure adherence to best practices in software development Monitor and troubleshoot production systems, ensuring the highest levels of availability, performance, and security Share on-call duties with the team to ensure smooth operations of the systems in production Stay updated with new technologies and trends, and introduce them where appropriate to enhance system performance and maintainability Experience (5+ years) in object-oriented PHP and modern PHP tools Software design principles (SOLID, KISS, DRY) and layered architecture Applied DDD practices: bounded contexts, aggregates, domain events Good knowledge of the latest versions of Laravel framework Strong understanding of relational databases like MySQL/PostgreSQL including transaction management Experience in database query optimization, analysing deadlocks and db performance Message-driven services in production with Apache Kafka or a comparable broker Handling money in application code: exact arithmetic, explicit rounding rules, multi-currency precision, idempotent money-moving operations Security best practices Experience with monitoring tools (Prometheus, Grafana or similar) Working with Docker/Docker Compose/Kubernetes on a daily basis Good level of spoken and written English (B1+) and Russian Experience with Go Fintech, payments, or crypto domain experience High-load Why join CryptoProcessing by Coinspaid You’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/month A 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 & Flexibility Fully remote work from almost anywhere Optional offices and relocation support Flexible, async-friendly environment Growth & Learning Budget for courses, certifications, and professional development Language learning support Cross-team learning and knowledge sharing Wellbeing & Support Medical insurance or reimbursement depending on location Access to mental health support Financial support for important life events Extras Merch shop with rewards system Team 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/