Backend Engineer - Node.js - Senior

This is a remote position.

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