Senior KDB+ Developer

About the Position

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 stakeholders-particularly within Risk functions-to deliver robust, efficient, and maintainable solutions.

Responsibilities

• Design, develop, and maintain kdb+ tick systems with a 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.

Requirements

• Must have

  • 8+ years of 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, and associated patterns.
  • Proven experience working with large datasets and optimizing 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.

• Nice to have

  • Knowledge of inter-process communication mechanisms in kdb+ and integration with external systems.
  • Experience tuning kdb+ systems for low-latency and high availability.
  • Familiarity with data quality checks, validation frameworks, and operational resilience patterns.
  • Exposure to financial markets data (market data, trading, risk, post-trade workflows, equity asset class).
  • Passion for writing clean, efficient, and well-structured code.

We Offer

• Relocation options
• Experience in an international environment
• Cross-cultural experience
• Feedback culture
• Regular appraisals
• Annual holiday - 20 or 26 days (depending on seniority)
• Occasional leave - 1 or 2 days (depending on circumstances)
• Child care leave - 2 days or 16 hours per year
• Absence due to force majeure - 2 days or 16 hours per year
• Maternity Leave - 20 weeks
• Parental Leave - 41 weeks
• Paternity Leave - 14 days
• Expert-led tech courses covering basic to advanced topics
• Internal instructor-led soft skills courses
• Comprehensive in-house self-learning resources for both soft and hard skills
• Access to external self-learning libraries like ProQuest eBook and Udemy for Business
• Cloud Programs: MS Cloud Academy, AWS Partner Academy, Google Cloud Academy
• Custom Learning Programs: upskilling, reskilling, technical mentorship
• Leadership Programs for Managers
• Multisport card
• Possibility to order Multisport card at the corporate rate for family members
• LuxGood Program: wellbeing seminars, contests, relaxation sessions, yoga sessions, etc.
• One Team Program: Buddy for each New Joiner; seminars, meeting, and workplace space to support integration with local community and culture; “Hire me” workshops for partners
• Preferential banking offer
• Preferential car leasing offer
• Cafeteria program discounts for shops, cinema tickets, holiday offers
• Luxoft Social Benefit Fund: sport and recreation benefits, the possibility to receive financial support
• Private Healthcare Insurance with unlimited access to specialists
• Full dental support
• Travel Insurance
• Possibility to add private healthcare coverage for family members at the corporate rate
• Life insurance at the corporate rate for employees and family members, including payment of the basic package for the employee by the employer
• Reimbursement for corrective glasses
• Many fun social activities organized by the Luxoft team offline in your city
• Online entertainment events for the whole company and local team events
• A workplace where you’re treated with respect within a multicultural team
• Rotation between projects and accounts
• New career opportunities

About the Company

Luxoft is a global technology services company that specializes in software development, digital transformation, and consulting services. With a strong presence in various industries, Luxoft is committed to delivering innovative solutions that drive business success for its clients.

Application

Apply for Senior KDB+ Developer in Krakow, Poland.

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Note: Relocation is not available for all open positions. At Luxoft Poland, it is possible to work remotely only from the territory of Poland.

Options offered by the Polish government.