Senior kdb+ Developer – BestX , Vice President

Senior kdb+ Developer – BestX

We are seeking an experienced Senior kdb+ Developer to join the BestX engineering team. In this role, you will design, build, and optimise high‑performance data platforms using kdb+, supporting BestX’s multi‑asset analytics capabilities. The ideal candidate brings deep expertise in kdb+ tick architectures, large‑scale performance tuning, and works closely with quantitative and engineering teams to deliver robust, efficient, and maintainable solutions.

• Design and develop key components of BestX’s multi‑asset analytics platform.
• Architect, build, and maintain kdb+ tick systems with strong consideration for data organization, schema design, and architectural trade‑offs.
• Develop and operate systems that process large‑scale, high‑frequency datasets, ensuring low latency, high throughput, and efficient memory utilisation.
• Analyse and optimise q queries, data models, and ingestion pipelines for both real‑time and historical workloads.
• Apply modern Agile development practices across cloud‑based, server‑side, and database‑driven systems.
• Build a strong understanding of Transaction Cost Analysis (TCA) and key regulatory benchmarks required for MiFID and MiFIR.
• Take full ownership of deliverables, driving work through from design to production.
• Establish and promote best practices, clean code standards, and sound design patterns.
• Act as a change agent, continuously improving engineering standards and ways of working.
• Champion Test‑Driven Development and “shift‑left” practices to support effective CI/CD pipelines.

• 5+ years of hands‑on kdb+ development experience.
• Strong expertise in kdb+/q and Python.
• Proficiency with modern data science tool chains, including Jupyter, pandas, Num Py, scikit‑learn, with applied machine‑learning experience.
• Solid understanding of parallel computing frameworks such as Slurm or equivalent technologies.
• Strong background in quantitative analysis, including mathematical modelling, statistics, regression, and probability theory.
• Bachelor’s or Master’s degree in Computer Science, Mathematics, Statistics, or a related STEM discipline from a top‑ranked university.
• Hands‑on experience with AWS and/or other modern cloud‑based infrastructure.

• Domain knowledge in FX, Fixed Income, Equity Derivatives.
• Additional expertise with kdb+ in complex, production‑scale environments.
• Exposure to modern JavaScript build tool chains, including Node.js, npm, Rush, Yarn, Webpack, Babel, and Cypress.

$125,000 - $226,250 Annual

Employees are eligible to participate in State Street’s comprehensive benefits program, which includes a 401(k) retirement savings plan with company match; insurance coverage including basic life, medical, dental, vision, long‑term disability, and other optional coverages; paid‑time off including vacation, sick leave, short‑term disability, and family care responsibilities; access to an Employee Assistance Program; incentive compensation including eligibility for annual performance‑based awards;

and eligibility for certain tax‑advantaged savings plans.

We consider all qualified applicants for all positions without regard to race, creed, color, religion, national origin, ancestry, ethnicity, age, disability, genetic information, sex, sexual orientation, gender identity or expression, citizenship, marital status, domestic partnership or civil union status, familial status, military and veteran status, and other characteristics protected by applicable law.