Senior kdb+ Developer – BestX , Vice President

State Street • Boston, MA

4d • $125,000 - $226,250

About The Position

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.

Requirements

• 5+ years of hands‑on kdb+ development experience.
• Strong expertise in kdb+/q and Python.
• Proficiency with modern data science toolchains, including Jupyter, pandas, NumPy, 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.

Nice To Haves

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

Responsibilities

• Design and develop key components of BestX’s multi‑asset analytics platform.
• Architect, build, and maintain kdb+ tick systems, with strong consideration for data organisation, 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.

Benefits

• our retirement savings plan (401K) with company match
• insurance coverage including basic life, medical, dental, vision, long-term disability, and other optional additional coverages
• paid-time off including vacation, sick leave, short term disability, and family care responsibilities
• access to our Employee Assistance Program
• incentive compensation including eligibility for annual performance-based awards
• eligibility for certain tax advantaged savings plans
• inclusive development opportunities
• flexible work-life support
• paid volunteer days

What This Job Offers

• Job Type: Full-time
• Career Level: Senior