Apps Dev Senior Engineer

Overview

In this senior role, you will design and build low-latency market data pipelines and services for Citi’s Commodities desks. You’ll work closely with front-office traders and quants to translate trading needs into robust software in a high-performance, front-office environment. The role combines engineering excellence with AI-driven workflow innovations to improve data quality, analytics, and trading lifecycle. This is a chance to influence market data infrastructure at a major financial institution.

Pay / Benefits

• Generous holiday allowance (27 days + bank holidays)
• Discretionary annual performance bonus
• Private medical insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave

Responsibilities

• Architect and optimize scalable market data engines and real-time distribution services
• Develop modular APIs and event-driven architectures across Java, Python, or C#
• Ensure reliable delivery of tick, end-of-day, and historical data to pricing libraries and trading apps
• Partner with front-office traders and quants to translate requirements into production software
• Champion Generative AI and Agentic AI workflows within the development lifecycle
• Drive best practices: TDD, CI/CD, containers, observability, and low-latency tuning
• Take end-to-end ownership from design to deployment and monitoring

Key requirements

• Advanced proficiency in Java, Python, or .NET/C# with focus on low-latency and concurrency
• Experience with messaging/streaming systems (Kafka, RabbitMQ, Solace, ZeroMQ, or gRPC)
• Relational databases and time-series/caching tech (PostgreSQL, Oracle, Redis, InfluxDB, etc.)
• DevOps: Git, CI/CD automation, Docker/Kubernetes/OpenShift, Linux
• Familiarity with LLMs, GenAI tools, and agentic frameworks (LangChain, LlamaIndex)
• Financial services experience in a Tier-1 bank or equivalent
• Domain knowledge in Commodities and cross-asset products; market data fundamentals

• Stakeholder management
• Strong communication with traders and tech leaders
• Self-driven with ownership
• Java, Spring Boot, concurrency, GC optimization
• Python (async, NumPy/Pandas, FastAPI)
• .NET Core, multi-threading, async I/O

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