We are looking for a highly experienced and visionary Senior Backend Developer to join Spark Eighteen in a full-time capacity. In this strategic role, you will lead the design and implementation of highly scalable, secure, and high-performance distributed systems that power mission-critical applications across multiple regions. You will play a pivotal role in shaping backend architecture, driving engineering excellence across teams, and mentoring developers to elevate technical standards. The role requires deep expertise in building resilient, multi-region systems, optimizing performance at scale, and embedding reliability and security into every layer of the backend stack. As a senior technical leader, you will influence key architectural decisions, ensure strong cross-functional alignment, and translate complex technical initiatives into measurable business impact. Requirements 5+ years of professional experience in backend development using Node.js Demonstrated expertise in strategizing, designing, and overseeing the implementation of highly scalable and resilient backend solutions across multiple geographical regions. Proven ability to ensure overall reliability, security, and performance of backend systems across development teams. Experience facilitating cross-team collaboration and driving technical alignment on critical backend initiatives and architectural decisions. Strong capability in identifying and implementing efficiency improvements to optimize system response times and resource utilization. Experience establishing quality assurance processes, testing frameworks, and deployment consistency standards across backend services. Expertise in leading incident analysis and driving continuous improvements in system resilience and fault tolerance. Ability to translate complex technical objectives into measurable business outcomes aligned with company strategy. Experience implementing complex architectural patterns and providing technology stack recommendations. Contribution to organizational technical strategy and development of thought leadership. Experience driving advanced performance and scalability initiatives for backend systems. Proven impact on project economic outcomes through cost-efficiency considerations in system design and implementation. Expertise in designing and implementing attribute-based access control (ABAC) and integrating with OpenID Connect. In-depth knowledge and practical experience with load balancing and horizontal and vertical scaling strategies. Proficiency in connection pooling, database replication, and sharding strategies. Experience integrating Content Delivery Networks (CDN) and implementing server-side caching mechanisms. Strong command of TypeScript architecture patterns and management of large-scale codebases. Proven ability to design and scale multi-schema GraphQL APIs, including federation or schema stitching. Extensive experience designing data strategies for distributed systems and multi-region databases. Deep understanding and hands-on implementation of Single Sign-On (SSO) and Multi-factor Authentication (MFA). Expertise in end-to-end latency tracing and optimization of high-throughput backend systems. Strong background in distributed system design, including resilience patterns such as circuit breakers and sagas. Proficiency in implementing and managing monitoring and logging solutions such as Prometheus, Grafana, and ELK stack. Experience designing comprehensive test strategies for large-scale applications, including TDD/BDD frameworks and mutation testing. Ability to design secure system architectures and automate incident response processes. Hands-on experience implementing CI/CD pipelines for serverless applications. Experience with load testing tools such as k6 or Artillery. Familiarity with multi-cloud serverless architectures and designing cost-efficient solutions. Hands-on experience with Infrastructure as Code tools such as Terraform or Pulumi. Proficiency in profiling and performance tuning backend applications, including Node.js streams and asynchronous optimizations. Knowledge of event-driven architecture and CQRS patterns. Proven track record of speaking at technical conferences or contributing to the broader technology community. Excellent verbal and written communication skills, with the ability to articulate complex technical concepts to diverse audiences. Exceptional leadership capabilities, driving technical initiatives and influencing cross-functional teams. High ownership mindset with a proactive approach toward system reliability, security, and performance. Passion for continuous learning, staying at the forefront of backend technologies, and contributing to thought leadership Mentorship capabilities, actively elevating the technical expertise of the team. Benefits Comprehensive insurance coverage that gives you peace of mind, so you can focus on doing your best work Flexible work arrangements designed to support sustained productivity, personal well-being, and work-life balance Continuous learning and accelerated skill development through hands-on projects and mentorship from experienced industry leaders Global client exposure across 20+ countries, offering real-world experience with diverse markets and business environments Opportunity to work on high-impact, large-scale projects that have collectively generated over $1B in measurable business value Competitive, market-aligned compensation packages that recognize performance, expertise, and long-term contribution Monthly demo days that celebrate innovation, showcase your work, and give you a real voice in what we build Annual recognition programs and performance-driven awards in a truly meritocratic environment Referral bonuses that reward you for helping grow a strong, like-minded team A strong problem-solving culture with opportunities to tackle meaningful, real-world challenges A positive, people-first workplace that supports happiness, balance, and long-term growth