Java Server Engineer

About The Company

Interactive Brokers Group, Inc. (NASDAQ: IBKR), a member of the S&P 500, is a global financial services company headquartered in Greenwich, Connecticut, with offices in over 15 countries. Through its affiliates, Interactive Brokers provides automated trade execution and custody of securities, commodities, foreign exchange, and prediction markets on over 170 markets in numerous countries and currencies.

For more than four decades, Interactive Brokers has focused on technology, automation, and innovation to provide clients worldwide with a sophisticated, unified platform to manage their investment portfolios. We serve individual investors, hedge funds, proprietary trading groups, financial advisors, and introducing brokers.

Our culture is driven by problem-solving, efficiency, and continuous improvement. We look for individuals who are intellectually curious, collaborative, and motivated to contribute to technology that helps simplify and enhance access to global financial markets. Interactive Brokers has consistently been recognized as a top broker by respected industry sources including Barron’s, Investopedia, Stockbrokers.com, and others.

Covestor Limited (doing business as Interactive Advisors ("IA")) are part of the IBKR group. We are an online robo-advisor and investing platform, offering clients in the USA a variety of portfolios. This role will be permanent with IA, and working with us you will get exposure to Interactive Advisors work streams but also many projects working with the wider IBKR group.

We're looking for a talented and driven Java Engineer to take a hands-on delivery role across our core financial systems. You'll be a co-owner of our codebase, a trusted colleague to your peers, and a key contributor to how we evolve our platform. Crucially, you'll bring a genuine understanding of AI concepts and how they can be applied to solve real product problems.

We currently operate a hybrid working model at IBKR, and so you will be able to commute to our fantastic central London office (The Walkie Talkie Building) 3 days per week, where you will be pleased to hear we offer lunch every day you are in the office from a selection of vendors.

Responsibilities

Taking end-to-end delivery ownership of key software development projects and enhancements

Designing and building scalable, server-side Java services that enhance our core financial systems

Monitoring, managing and further automating business operations

Acting as a co-owner of the codebase — proactively identifying and implementing improvements

Collaborating closely with stakeholders to ensure requirements are well understood, designs are sound and deadlines are met

Reviewing designs and code produced by colleagues, providing clear and constructive feedback

Requirements

Technical

3+ years of industry experience with a strong track record of delivery

Solid server-side design and development skills; our stack is Java, Linux, Apache and Mongo and Postgres

Exposure to Spring Boot and Elasticsearch is a plus

Familiarity with the full agile development lifecycle: version control, testing, CI/CD and build tooling

A strong grasp of AI concepts - including familiarity with LLMs, machine learning fundamentals, prompt engineering or AI-assisted development tooling is a plus

Familiarity with vector embeddings and semantic search is a plus

Experience designing or building agentic AI systems - including tool use, multi-step reasoning, structured output - is a strong plus

A strong foundation in core computer science principles: algorithms, data structures, system design

Soft Skills & Ways of Working

Strong organisational and communication skills, comfortable engaging both engineers and business stakeholders

Able to apply creative, pragmatic thinking to find elegant solutions rather than just brute-force ones

Demonstrates strong personal integrity and accountability

Open to and actively seeks constructive feedback

Academic

A degree in Computer Science, Engineering or a related STEM discipline; a postgraduate qualification is a plus

Personal Attributes

A passionate advocate for clean, concise and simple code and design

A natural technical leader who earns the trust and confidence of peers

A collaborative team player — comfortable giving and receiving constructive feedback, following as well as leading, and always willing to learn

Someone who thrives in a fast-paced, relatively unstructured environment and takes genuine personal accountability for outcomes

Quick to get up to speed in new business domains, asking the right questions and absorbing new concepts rapidly

Location:

20 Fenchurch Street, London, EC3M 3BY

9am – 6pm, Monday – Friday

Benefits

Career support and development

Salary commensurate with experience

Performance based discretionary cash bonus scheme

Discretionary stock grant

Group Life Assurance cover

Group Income Protection

Occupation pension scheme based on Gross earnings

Hybrid working model

Above statutory annual leave, increasing with service

Daily company-paid lunch and healthy snack options throughout the day (when working from the office)

Access to Private Medical Insurance, Dental Plan and / or Health Cash Plan*

Corporate events

Travel season ticket loans*

Cycle to work scheme*

Fitness subsidisation

on successful completion of the probation period