KDB+ Developer

OneAPPS Consulting; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

OneAPPS Consulting in London is seeking an experienced Senior KDB+ Developer to design and optimize high-performance data platforms built on kdb+. You will work closely with Risk stakeholders and deliver scalable, efficient solutions across real-time and historical workloads.

The role requires deep expertise in kdb+ tick architecture, q language, and performance tuning at scale, with mentoring responsibilities and participation in an Agile delivery process.

Qualifications

• Hands-on KDB+ development in a production environment.
• Deep Q language skills: tables, joins, aggregations and windowed analytics.
• Experience with tick architecture: ticker plant, RDB, HDB.
• Proven ability to optimize queries for performance and scale.
• Unix/Linux proficiency including shell scripting for automation.
• Experience with Agile, CI/CD and version control practices.
• Ability to explain complex concepts to technical and non-technical stakeholders.

Responsibilities

• Design, develop and maintain kdb+ tick systems for high performance data platforms.
• Handle large, high-frequency datasets with low latency and high throughput.
• Analyze and optimize q queries and ingestion pipelines for real-time and historical workloads.
• Collaborate with Risk teams to translate requirements into scalable code.
• Drive performance benchmarking and continuous improvement through refactoring.
• Mentor junior and mid-level developers to promote technical excellence.
• Participate in design reviews, production support and RCA of complex issues.
• Contribute to agile delivery, testing and release activities.

Skills

KDB+ development

Q language

kdb+ tick architecture

Large data optimization

Unix/Linux scripting

Agile / CI/CD

Stakeholder communication

Job description

OneAPPS Consulting (www.oneapps.com) is a Technology consulting firm based out of London and offices across Europe. We are working on various projects involving diverse, multicultural teams with clients across the Europe. We are an invaluable partner and our teams have collaborated to support the growth of our clients. With more than 7 locations worldwide we help our clients to deliver their projects smoothly. We look forward to getting to know you and working with you.

Role: KDB+ Developer

Location: London -Hybrid

We are seeking an experienced Senior KDB+ Developer to design, develop and optimize high performance data platforms built on kdb+. The ideal candidate will have deep expertise in kdb+ tick architecture, performance tuning at scale and close collaboration with business stakeholder - particularly within Risk functions - to deliver robust, efficient and maintainable solutions.

Responsibilities

• Design, develop and maintain kdb+ tick systems with strong understanding of data organization, schema design and the performance implications of different architectural approaches.
• Build and operate solutions handling large scale, high frequency datasets, ensuring low latency, high throughput and efficient memory usage.
• Analyze and optimize q queries, data models and ingestion pipelines for both real time and historical workloads.
• Collaborate closely with Risk function teams to translate business requirements into efficient, scalable and performant code.
• Drive continuous improvement through refactoring, performance benchmarking and adoption of best practices
• Mentor and guide junior and mid-level developers, fostering a culture of technical excellence, code quality and knowledge sharing.
• Participate in design reviews, production support and root cause analysis of complex system issues.
• Work collaboratively within an Agile or iterative delivery environment, contributing to design, implementation, testing and release phases.

Skills Must have:

• Hands on experience in kdb+ development in a production environment.
• Strong expertise in q language including: table design (splayed, partitioned, segmented), In memory vs on disk trade offs, efficient joins, aggregation and windowed analytics
• Deep understanding of kdb+ tick architecture including ticker plant, RDB, HDB nd associated patterns
• Proven experience working with large datasets and optimising queries for performance and scalability
• Strong background in Unix/Linux environments, including shell scripting for automation, monitoring and operational tooling
• Solid understanding of software delivery processes and methodologies (Agile, CI/CD, Version control, release)
• Ability to communicate clearly with both technical and non-technical stakeholders, demonstrating systematic reasoning and problem solving skills