Description

Job Description
•    12+ years of strong experience on Ruby.
•    Deep knowledge of Ruby MRI internals (GIL, memory model, object allocation)
•    Ruby MRI garbage collector (mark & sweep, generational GC)
•    Strong experience with Rails internals (ActiveRecord, Arel, middleware stack)
•    Ability to optimize slow queries, N+1 issues, and memory leaks
•    Experience with multi-threaded / concurrent Ruby (Puma, Sidekiq tuning)
•    Ruby VM instruction set (YARV bytecode basics)
•    Concurrent Ruby gem
•    Thread pools vs Fibers vs Ractors
•    Async frameworks (Falcon / Async gem)
•    Experience integrating Ruby with Kafka (ruby-kafka / Karafka), exactly-once semantics handling
•    Designing: event schemas, schema evolution (Avro / JSON schema)
•    Proven experience scaling Rails apps to:
o    10K+ RPS
o    millions of daily transactions
•    Hands-on experience with:
o    Event-driven architecture (Kafka / RabbitMQ)
o    CQRS & Event Sourcing
o    Saga pattern (choreography & orchestration)
•    Strong understanding of:
o    Eventual consistency
o    Distributed transactions
o    Idempotent APIs
•    Deep understanding of:
o    Caching strategies (Redis, Memcached)
o    Background processing (Sidekiq, Resque)
o    Database sharding and read replicas
•    Strong experience with:
o    PostgreSQL (query tuning, indexing, vacuum, locking)
o    Redis (data structures, pub/sub, distributed locks)
•    Ability to debug:
o    deadlocks
o    slow queries
o    replication lag
o    Low-Latency / High-Throughput Optimization
•    Experience achieving
o    sub-50ms API latency under load
o    High throughput using connection pooling, query batching
•    Hands-on tuning:
o    Puma workers vs threads trade-offs
o    kernel tuning (ulimits, TCP tuning)
•    Deep Sidekiq Internals:
o    Queue prioritization strategies
o    Dead job recovery
o    idempotent job design
o    Redis contention debugging
o    Sidekiq middleware customization
•    Experience with:
o    AWS (EKS, RDS, SQS, Lambda)
o    Docker & Kubernetes
o    CI/CD pipelines (GitHub Actions / Jenkins)
•    Observability stack:
o    Prometheus
o    Grafana
o    ELK / OpenSearch
o    OAuth2 / JWT authentication
o    PCI-DSS exposure (preferred)
o    Secure API design (rate limiting, mTLS, encryption)
•    Experience working at:
o    high-frequency trading firms
o    payment processors
o    crypto exchanges
o    JRuby / TruffleRuby
o    GraphQL APIs
o    gRPC services
•    Exposure to:
o    fraud detection systems
o    real-time risk engines
Essential Skills
    12+ years of strong experience on Ruby.
•    Deep knowledge of Ruby MRI internals (GIL, memory model, object allocation)
•    Ruby MRI garbage collector (mark & sweep, generational GC)
•    Strong experience with Rails internals (ActiveRecord, Arel, middleware stack)
•    Ability to optimize slow queries, N+1 issues, and memory leaks
•    Experience with multi-threaded / concurrent Ruby (Puma, Sidekiq tuning)
•    Ruby VM instruction set (YARV bytecode basics)

Key Skills

Education

Any Graduate