Senior kdb+ Developer

INTRODUCTION.

Every query matters. Every millisecond counts. Every system you build shapes the future of data-driven finance.

At [Employer hidden — view at passion-project.co.uk], we thrive on solving complex data challenges in high-stakes environments. We’re a team of engineers, problem-solvers, and collaborators who believe in pushing boundaries, not egos.

If you're a seasoned kdb+ developer ready to lead, innovate, and make an impact, we want to hear from you.

Job Details.

#### > Reference:

REF174Z

#### > Department:

Time Series Data

#### > Location:

Belfast Office Suite 5, Sturgeon Building, 9-15 Queen Street, Belfast, BT1 6EA

#### > Contract Type:

Full-time

#### > Experience:

Mid-Senior Level

#### > Industry:

Information Technology And Services

#### > Closing Date:

01/06/2026

Requirements.

What You Bring

- 5+ years of hands-on kdb+ development, with deep expertise in q and time-series data.

- Proven experience designing and implementing kdb+ architectures and scaling kdb+ systems in production.

- Strong background in Unix/Linux environments and scripting.

- Demonstrated technical leadership and decision-making in fast-paced projects.

- Excellent communication skills to explain complex systems to both technical and non-technical stakeholders.

- Experience in capital markets or investment banking to understand the domain and its demands.

- A passion for clean, performant code and continuous improvement.

Bonus Points For:

- Experience with Python, cloud platforms (AWS, GCP, Azure), or other time-series databases.

- Exposure to tick data, real-time analytics, or electronic trading systems.

- People management or team leadership experience.

Responsibilities.

As a Senior kdb+ Developer at [DI] you’ll be at the forefront of delivering high-performance, scalable solutions for some of the world’s most data-intensive financial institutions. You’ll:

- Lead technical delivery on client projects, setting the standard for quality and performance.

- Design and implement robust kdb+ architectures that handle billions of rows of time-series data.

- Collaborate with quants, traders, and analysts to translate business needs into performant, efficient code.

- Mentor and guide junior and mid-level developers, fostering a culture of technical excellence and knowledge sharing.

- Own the full development lifecycle by developing, testing, supporting and maintaining all code for client applications

- Drive innovation by staying ahead of the curve in kdb+, q, and adjacent technologies.

You'll know if you're up to the challenge

our Benefits.

### Hybrid working.

The commute can be a pain, but there's really no virtual replacement for sitting around a whiteboard with teammates. We offer hybrid working, with flexbility around in-office or from-home, allowing our people to achieve a good work/life balance.

### REFERRAL SCHEME.

We love to see referrals coming through for people that could add to the ever growing [Employer hidden] team. Referring a friend means cash for you!

### Travel opportunities .

We offer opportunities to work globally in locations such as London, New York, Hong Kong, Singapore and Japan- with all expenses paid!

### Healthcare cover.

We provide private health care via Benenden Health, including 24/7 GP, Mental Health helpline, medical diagnosis and treatment, and physiotherapy.

### Holiday entitlement

We get up to 27 days leave, public holidays, compensatory days off, and holiday carry over (different holiday entitlements apply depending on region)

### Continual professional development.

We have extensive training ranging from leadership to technical skills. Monthly 1-2-1s with your People Leader will support and guide you in the right direction. We run an internal promotion process twice a year.

Find out more

our Benefits.

- ### Holiday entitlement

We get up to 27 days leave, public holidays, compensatory days off, and holiday carry over (different holiday entitlements apply depending on region)

- ### Continual professional development.

We have extensive training ranging from leadership to technical skills. Monthly 1-2-1s with your People Leader will support and guide you in the right direction. We run an internal promotion process twice a year.

- ### Hybrid working.

The commute can be a pain, but there's really no virtual replacement for sitting around a whiteboard with teammates. We offer hybrid working, with flexbility around in-office or from-home, allowing our people to achieve a good work/life balance.

- ### REFERRAL SCHEME.

We love to see referrals coming through for people that could add to the ever growing [Employer hidden] team. Referring a friend means cash for you!

- ### Travel opportunities .

We offer opportunities to work globally in locations such as London, New York, Hong Kong, Singapore and Japan- with all expenses paid!

- ### Healthcare cover.

We provide private health care via Benenden Health, including 24/7 GP, Mental Health helpline, medical diagnosis and treatment, and physiotherapy.

- ### Holiday entitlement

We get up to 27 days leave, public holidays, compensatory days off, and holiday carry over (different holiday entitlements apply depending on region)

- ### Continual professional development.

We have extensive training ranging from leadership to technical skills. Monthly 1-2-1s with your People Leader will support and guide you in the right direction. We run an internal promotion process twice a year.

- ### Hybrid working.

The commute can be a pain, but there's really no virtual replacement for sitting around a whiteboard with teammates. We offer hybrid working, with flexbility around in-office or from-home, allowing our people to achieve a good work/life balance.

- ### REFERRAL SCHEME.

We love to see referrals coming through for people that could add to the ever growing [Employer hidden] team. Referring a friend means cash for you!

LET'S CHAT ABOUT YOUR PROJECT.

GET IN TOUCH