Senior Backend Engineer II - US Stocks
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Ajaib GroupFintech brokerage
Jakarta, Jakarta, Indonesia. Bangkok, Bangkok, Thailand. PolandFull-TimeSenior
Salary not disclosed
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Job Details
- Experience
- 5+ years of professional backend engineering
- Required Skills
- AWSGCPJavaKafkaGogRPCRedisRESTful APIsMicroservices
Requirements
- Bachelor's degree in Computer Science or equivalent practical experience.
- 5+ years of professional backend engineering experience.
- Track record of owning production services under high traffic.
- Strong skills in Java, Go, or another modern backend language.
- Solid understanding of microservices, REST/gRPC APIs, and event-driven design.
- Experience with reliability and observability practices.
- Hands-on experience with relational and NoSQL databases, including query tuning.
- Experience with Redis caching and Kafka messaging.
- Experience running services on GCP or AWS, using containers and CI/CD.
- Brokerage, trading, payments, cross-border money movement, or other regulated-environment experience is a plus.
- Knowledge of API-first brokerage platforms or crypto exchanges, WebSocket market-data streaming, and FIX protocol fundamentals.
Responsibilities
- Design, build, and run scalable, secure backend services and APIs for trading, funding, market data, and portfolio features.
- Own larger features and services end to end, including monitoring, alerting, and on-call follow-up.
- Design for accurate money and quantity handling, idempotent requests, safe retries, and audit trails.
- Integrate with US brokerage and custody partners, making integrations resilient to outages, delays, and duplicate or out-of-order messages.
- Build and improve reconciliation between company and partner records, and drive root-cause fixes for mismatches.
- Handle US-specific events, including market hours, dividends, stock splits, and settlement timing.
- Keep services fast and stable during US market open and volatile days, and plan capacity for known events.
- Lead design reviews, provide code reviews, investigate production incidents, and ship lasting fixes.
- Mentor mid-level engineers and share knowledge within the team.
- Design resilient, low-latency order routing across liquidity providers and venues, handling rate limits, partial fills, and complex order lifecycles.
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