At a Glance
- Tasks: Engineer low-latency systems and lead innovative application development.
- Company: Join Citi, a global leader in finance and technology.
- Benefits: Enjoy competitive salary, 27 days leave, private medical care, and hybrid work options.
- Other info: Dynamic team culture with mentorship and continuous learning opportunities.
- Why this job: Shape the future of finance while solving real-world challenges.
- Qualifications: Expertise in Java, C++, or Rust with algorithmic trading experience.
The predicted salary is between 81000 - 99000 £ per year.
Senior Low Latency Engineer
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.
What We do / The Team
This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team.
The overall objective of this role is to lead applications systems analysis and programming activities.
The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team.
The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities.
The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency e Trading platforms in Markets Technology.
Responsibilities
- 90% hands in the Java or Rust codebase.
We build microservices based event sourcing systems on a low latency in-house framework.
Response times in the 10 microsecond to 100 microsecond range.
- Lead integration of functions to meet goals, deploy new products, and enhance processes
- Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems
- Provide world class expertise in area of Java low latency development.
- Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals
- Consult with end users to identify system function specifications and incorporate into overall system design
- Influence and negotiate with senior leaders and communicate with external parties
- Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers.
- Key Skills and Experience required
- Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development
- In-depth experience with Algorithmic Trading application development, preferably in low latency environment
- Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e. g. KDB)
- Demonstrated leadership, project management, and development skills
- Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices.
- Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel.
- Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e. g. Solarflare Open Onload
- Performance assessment and targeted tuning.
- Design and architectural elegance.
- Experience in implementing projects
- Great communicator with high EQ.
- Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams.
- Relationship and consensus building skills
- Nice to have
- Background in C++
- 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.
- #LI-AP2
- Job Family Group
- Technology
Senior Low Latency Engineer in London employer: Citi Group
Citi Belfast is an exceptional employer, offering a dynamic work environment that fosters collaboration and innovation in the financial sector. With a strong focus on employee growth, you will have opportunities to mentor junior staff while driving impactful governance and risk management initiatives. The hybrid work model and competitive benefits package further enhance the appeal of working in this vibrant location, making it a rewarding place for professionals seeking meaningful careers.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Low Latency Engineer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Citi Group or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Citi Group.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Citi Group.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Citi Group that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Low Latency Engineer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Citi Group.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Citi Group and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Citi Group
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Citi Group uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
