Junior Trading Tool Developer - EMEA Credit
Citigroup · London
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.
Citi is seeking a highly motivated and curious Junior Trading Tool Developer to join Fixed Income Trading Services, embedded directly within the EMEA Credit Flow Trading desk.
Based on the trading floor, this role offers an exciting opportunity for direct, daily collaboration with traders, quantitative analysts, and product strategists. As a trading desk tool developer, you will focus on building, enhancing, and maintaining rapid, business-critical applications and services—spanning real-time pricing and risk tools, market data streaming monitors, trade booking automation, and data analytics scripts. Working alongside senior desk developers, you will leverage a modern Python ecosystem—including Streamlit, Redis, SQL databases, Object Storage, REST/WebSocket APIs, and data manipulation libraries—to rapidly prototype and deliver high-impact trading solutions in a fast-paced front-office environment.
Key Responsibilities
- Desk Tooling & Automation: Assist in building and supporting tactical and strategic desk tools, scripts, analytics dashboards, and automation utilities that directly support trade execution, real-time risk, and P&L workflows.
- Direct Desk Interaction: Work alongside senior developers, traders, and quants to understand day-to-day desk challenges, translating business operational needs into robust, reliable software tools.
- Data & Market Feed Integration: Connect desk tools to internal pricing engines, trade capture systems, relational/time-series databases, and real-time messaging/streaming buses (e.g., Kafka, Solace, WebSockets, or proprietary pub/sub feeds).
- Rapid Prototyping & Iteration: Build rapid prototypes and deliver iterative enhancements to solve immediate desk needs while adhering to engineering standards.
- Workflow & Domain Mastery: Actively build a deep foundational understanding of Credit Flow products (bonds, CDS, credit indices), pricing models, and end-to-end trade lifecycles.
- Code Quality & Best Practices: Write clean, modular, and type-annotated Python (Python 3.10+); ensure comprehensive test coverage (pytest); adhere to CI/CD pipelines, and Git workflows.
- Mentorship & Learning: Participate actively in code reviews, pair programming, and technical learning sessions under the guidance of senior trading technology leads.
- Risk, Controls & Operational Rigor: Follow robust SDLC practices, change management processes, and ensure tools adhere to operational risk and compliance standards in a regulated trading environment.
Qualifications & Skills
Technical Background
- Core Python: Strong programming fundamentals in Python 3.10+ (OOP, type hints, generators, decorators, and concurrency/asyncio).
- Data Manipulation: Hands-on proficiency with Pandas and NumPy for time-series and tabular data processing.
- Rapid UI & Dashboards: Practical experience building interactive data applications using Streamlit (or similar Python UI frameworks).
- In-Memory Caching & Messaging: Working knowledge of Redis (caching patterns, data structures, and pub/sub).
- APIs & Real-Time Communication: Experience creating and consuming REST APIs (e.g., FastAPI) and event-driven data streaming over WebSockets.
- Databases & Storage:
- Solid understanding of SQL (joins, window functions, query optimization) across relational databases (PostgreSQL, Oracle, or SQL Server).
- Familiarity with interacting with Object Storage / Cloud Storage (e.g., S3 APIs, boto3) for dataset and artifact persistence.
- Tooling & Engineering Standards: Proficient with Git, Linux/Unix command-line tools, and automated testing with pytest.
Nice-to-Have
- Exposure to containerization basics (Docker) and familiarity with ECS platforms.
- Familiarity with leveraging AI coding assistants or agent-based tooling to accelerate frontend development
- Interest in or basic understanding of Fixed Income/Credit financial products (Bonds, CDS, Credit Indices, Swaps).
What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:
- 27 days annual leave (plus bank holidays)
- A discretional annual performance related bonus
- Private Medical Care & Life Insurance
- Employee Assistance Program
- Pension Plan
- Paid Parental Leave
- Special discounts for employees, family, and friends
- Access to an array of learning and development resources
Visit our About Us | Culture, Values & Benefits page to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.
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Job Family Group:
Technology------------------------------------------------------
Job Family:
Applications Development------------------------------------------------------
Time Type:
Full time------------------------------------------------------
Most Relevant Skills
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Other Relevant Skills
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