Environment: Faced-paced start-up – High ownership, Rapid iteration
Company: Rapex Technologies

Role Overview

We are building a scalable, multi-product ecosystem where individual applications function as independent
microservices integrated into a unified platform with Single Sign-On (SSO).
We are looking for a Senior Solution Architect to design, govern, and evolve this architecture ensuring scalability,
security, and long-term maintainability as we expand nationally and into global markets.

– Lead architecture design for a multi-product ecosystem built on microservices, integrated into a unified platform with Single Sign-On (SSO)
– Define scalable, secure, and high-performance system architecture to support nationwide and global expansion
– Establish standards for APIs, service communication (REST, gRPC, event-driven), and data flow across services
– Design and implement identity and access management (OAuth2, OpenID Connect, JWT)
– Drive cloud infrastructure decisions (AWS preferred), ensuring high availability, fault tolerance, and cost efficiency

Architect

– Multi-tenant systems to support multiple products and user bases under a single platform
– Collaborate closely with Product, Engineering, and DevOps to translate business needs into technical solutions
– Conduct architecture reviews and guide teams on best practices, scalability, and system design
– Balance speed, scalability, and maintainability while making critical technical decisions
– Own and evolve the long-term architecture roadmap for the platform
– Solid understanding of distributed systems, event-driven architecture, and API gateways
– Experience with containerization (Docker) and orchestration (Kubernetes) Platform Governance & Scalability Experience
– Proven experience designing and scaling large distributed platforms serving high-volume users and multiple products
– Define architectural governance, engineering standards, service ownership models, and system documentation practices
– Design strategies for observability, centralized logging, monitoring, disaster recovery, and fault isolation
– Architect secure tenant isolation, API governance, service discovery, and interoperability across platform services
– Ensure platform readiness for regional and international scale, including GCC and US market expansion
– Drive technical decision-making around performance optimization, resilience, scalability, and long-term maintainability

Qualifications and Tools

– Programming languages – Python, Node.js, or equivalent backend stack
– Git – branching strategies (GitFlow), code review, PR management
– CI/CD – AWS CodePipeline, CodeBuild, CodeDeploy or equivalent
– Monitoring – CloudWatch, Grafana, Datadog or equivalent
– API testing – Postman, Insomnia
– AI-assisted development tools – familiarity with Claude, Cursor, Copilot
– Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field
– 5+ years of hands-on experience in software architecture and cloud infrastructure
– Proven experience architecting fintech, or payment-grade systems
– Experience with PCI-DSS compliant architecture is strongly preferred
– AWS certifications – Solutions Architect Professional or equivalent strongly preferred