Senior Application Developer - Flink, VP

Who we are:  
Citi, the world leading global bank, has approximately 200 million customer accounts and a presence in more than 160 countries and jurisdictions worldwide. Citi provides consumers, corporations, governments and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management. Citi enables clients to achieve their strategic financial objectives by providing them with cutting-edge ideas, best-in-class products and solutions, and unparalleled access to capital and liquidity

About the team:
The Optima Platform Team provides key software infrastructure to the ICG Risk Technology organisation. We develop libraries, APIs and tooling for use by over 1000 developers across the risk technology functional teams. Components of the platform team execute releases, manage and upgrade third-party components, maintain hundreds of builds and repos and deliver continuous improvement to our SDLC & agile model.

This is a senior developer role in the Flink Technology Team. This element of the platform team is dedicated to the development of a Flink-based risk computation platform, including the API, reusable core logic and initial implementations of selected risk processing flows. The new platform which will enable migration of dozens of functional apps and millions of lines of code from a batch job sequential model to a fully distributed, highly resilient and horizontally scalable model.

The Flink Technology Team is primarily based in London, consisting of senior Java developers and dedicated support staff. This is a high-profile, high-priority project, now moving from the proof-of-concept to architecture and full-scale development. This is not a traditional 'embarrassingly parallel' grid project (e.g. DataSynapse/Symphony risk grid): we are focused on nonlinear logic that requires newer tools and a more sophisticated approach.

What you will be doing:
•    Design and implement components of a compute platform, based on Apache Flink, that provide a productive and high-performance basis for Risk Technology app development. These are challenging flows that are not trivial to move onto a distributed platform.
•    Independently research and develop solutions to performance, scaling and deployment challenges, while in close with our Flink expert team. This includes use of Ignite, Kafka, Zookeeper and other OS components as required.
•    Refactor selected existing business logic from a local threading model to a distributed parallelism model.
•    Provide input, problem diagnosis and a general dev perspective to our ops and devops staff as they design and deliver infrastructure and process change.
•    Act as an advisor, coach and troubleshooter during large-scale onboarding of functional development teams to the new distributed risk platform.
•    When required, reach out to teams across the Optima group and Citi, to obtain information or provide expertise. Project a positive and professional impress of the Platform Team to software engineers, business analysts and support staff.

What you will bring to the role: 
Technical Skills 
•    Extensive Core Java experience developing large-scale Enterprise software.
•    Good knowledge of local concurrency (Java threads) and Java internals (class loading, memory management).
•    Experience with a distributed parallel system: ideally Flink or Spark, but Akka Cluster, in-cache processing in Ignite/Hazelcast/Coherence, REST-based microservices at scale, or queue-based concurrency will be considered. 
•    Experience with a Distributed Caching framework such as the above or Gemfire, Redis or equivalent.
•    Experience with an Agile software development process: in particular test strategies that can support rapid change on mission-critical software.
•    Databases: at least basic knowledge of SQL/RDBMS and NoSQL (ideally MongoDB).
•    Familiarity with Linux environment including scripting skills.
•    SDLC/Dev Ops - Git/BitBucket, CI/CD pipeline frameworks such as Jenkins, SonarQube, JIRA, Bitbucket.

Competencies
•    Excellent written and spoken communication skills (English).
•    Ability to work independently or in close collaboration with other senior developers.
•    Deep computer science knowledge: interest in algorithms, networks and optimisation. 
•    Able to work under pressure when required: this is an infrastructure dev team, but some crunch and reprioritisation is inevitable.
•    A self-starter and has the thirst to continually improve and develop.

Bonus points for 
•    Experience with mentoring and developing with more junior team members to ensure they can deliver at the highest quality.  
•    Experience working in the Capital Markets domain. 
•    Understanding of Derivatives and Risk management
•    Experience re-engineering complex franchise critical applications to new platforms.
•    Cloud computing technologies with practical experience working with containers, microservices and large datasets (Docker, Kubernetes).

Qualifications/Education
•    Bachelor’s/Master’s degree in Computer Science/Engineering/STEM subject or experience in a similar role.

What we can offer you

This role offers an exciting opportunity to be at the heart of Citi’s financial transformation journey. Demonstrated success in this highly visible program will also provide multiple growth opportunities for talented and motivated individuals who seek a career in managing technology services.

We work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live well and save well.

By joining Citi London, 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: 

• Generous holiday allowance starting at 27 days plus bank holidays; increasing with tenure

• A discretional annual performance related bonus 
• Private medical insurance packages to suit your personal circumstances
• Employee Assistance Program  
• Pension Plan 
• Paid Parental Leave 
• Special discounts for employees, family, and friends 
• Access to an array of learning and development resources 

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. 

Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.

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Qualified applicants will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

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