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About Citadel Securities Citadel Securities is the next-generation capital markets firm and a leading global market maker. We provide institutional and retail investors with the liquidity they need to trade a broad array of equity and fixed income products in any market condition. The brightest minds in finance, science and technology use powerful, advanced analytics to solve the market’s most critical challenges, turning big ideas into real-world outcomes. Role Overview: We’re looking for driven innovators and optimizers who are excited about cutting-edge technology and making a measurable impact. If you’re passionate, obsessed with performance, and excited to work where nanoseconds matter. Responsibilities : Solve What Matters: Break down intricate challenges and deliver clear, elegant solutions that drive real world outcomes Build and Scale: Design, build and maintain high performance systems that are the backbone of our trading infrastructure Optimize Everything: Continuously push the limits of latency, reliability, and throughput in a distributed environment Partner and Deliver: Collaborate directly with traders, researchers, and fellow engineers to deliver ideas into production Own it in production: Take pride in running your code live - Monitoring, supporting and improving it every day Qualifications : Deep experience in C++ with a passion for clean, performant code A strong grasp of multithreading, concurrency, and distributed systems Curiosity to explore how things work and a drive to improve them Clear, thoughtful communication and the ability to thrive in a high ownership environment Bachelor’s (or higher) degree in a Computer Science, Engineering or related field Background in Trading or finance is a plus but not a requirement This role requires you to be based in one of our global offices listed below. If you are not currently located in one of these cities, we offer a comprehensive relocation package to support your move: Gurugram, Hong Kong, London, Miami, New York, Shanghai, Singapore, Sydney, Zurich. Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.
Here's how to pick the right one and stand out in your application.
144.883Jobs
31.687IN
81%EN
That number is real. WorkMundi's database shows 144,883 open engineer roles across the world. India has the most with 31,687 jobs, followed by the United States with 30,084. If you just finished reading one job ad and felt paralyzed by choice, you're not alone—but this scale is actually an advantage. It means you can afford to be selective.
Start by geography and language. The majority of engineer ads—117,837 of them—have the job posting text written in English. Use that as one filter, but remember: the ad text language tells you nothing about whether the role actually requires you to speak English day-to-day. Read the job description carefully. Then check which countries have the volume you're targeting. Singapore, Poland, and Australia round out the top five after India and the US.
Next, learn who's hiring. Accenture has posted 2,801 engineer roles. andurilindustries, speechify, and jobgether are also actively recruiting. If you're applying to one of these names, research their hiring patterns and interview style before you apply. That homework pays off.
When you interview, expect the question every engineer hears: 'Tell me about a time you had to debug a problem that wasn't in your job description.' Have a specific story ready—not a general one. Name the tools, the deadline pressure, and what you learned. Hiring managers listen for whether you see problem-solving as part of the role itself, not a favour.