Sr. Software Engineer I, Evaluation Services (Scala)
NinjaTrader2 months ago
Base Salary
$125k - $175k/yr
Responsibilities
- Design and implement Scala backend services for evaluation, risk, trading, real-time auto-liquidation, account state management, and post-trade processing.
- Build and evolve actor-based systems handling high-throughput market data, position changes, and event-driven workflows.
- Own significant features end to end, including technical specifications, implementation, code review, and production handoff.
- Design PostgreSQL data models and database changes, including JSONB usage, shared schemas, Protobuf, and SQL repositories.
- Diagnose complex backend issues and production incidents by analyzing logs, tracing distributed flows, and reproducing edge cases under realistic loads.
- Drive code quality through pull request reviews, acceptance criteria, development testing, instrumentation, and observability.
- Collaborate with Trading Services, Solutions Engineering, and Product to translate requirements into scoped and estimated work.
- Contribute to architecture decisions, legacy Scala modernization, technical debt remediation, and evaluation of event bus technologies.
- Mentor junior engineers on Scala, functional design, testing, and incident response.
- Develop deep expertise in the evaluation platform and partner integrations while providing backend technical leadership.
Requirements
- 5+ years of backend software engineering experience building production systems with real-time data, concurrency, and high availability.
- Strong hands-on Scala expertise, including idiomatic Scala, functional patterns, testing with ScalaTest or similar tools, and experience in large Scala codebases.
- Experience with actor-based concurrency models such as Akka, Pekko, or equivalent technologies, including supervision, message passing, and backpressure.
- Strong PostgreSQL skills covering schema design, indexing, query optimization, and JSONB versus normalized data structures.
- Experience with event-driven architectures, message buses such as Kafka or Pub/Sub, and asynchronous workflows.
- Ability to troubleshoot distributed systems, trace requests, isolate root causes, write technical specifications, scope work, and identify risks.
- High standards for code, testing, documentation, and pull requests, plus the ability to adapt to shifting priorities and ambiguity.
- Strong written and verbal communication skills for explaining backend tradeoffs to technical and non-technical audiences.
- Preferred experience in trading platforms, fintech, capital markets, trading concepts, Protobuf, gRPC, legacy Scala modernization, Scala-to-Rust or Scala-to-Go transitions, observability, Datadog, Google Cloud Platform, or enterprise partner integrations.
Benefits
- Hybrid schedule with in-office work Tuesday through Thursday and remote work Mondays and Fridays.
- 20 additional flex remote days annually and five company-wide office-optional weeks tied to major holidays.
- Generous paid time off accruing at 18 days per year, seven paid holidays, five conditional holidays, and one service day.
- 401(k) plan through ADP with a company match of up to 3.5% of employee contributions.
- Paid parental bonding leave and health, vision, dental, life, and disability insurance, with life and disability coverage fully paid by NinjaTrader.
- Remote flexibility may be available for exceptional candidates in specified states.
Tech Stack
Categories
About NinjaTrader
NinjaTrader builds a multi-device trading platform and runs a futures brokerage and clearing firm for active retail and professional traders. Its software offers advanced charting, strategy development, backtesting, and trade execution, and the brokerage earns commissions and fees. Founded in 2004 and headquartered in Chicago, it is part of Payward (Kraken).