Lead Python Implementation Engineer

Overview

OneMarketData is seeking a seasoned Lead Python Implementation Engineer to join our Implementation Team. In this role, you will lead the architecture, customization, and deployment of our proprietary OneTick-based financial products across AWS-hosted and client environments. You will design and optimize large-scale ETL frameworks, ensure high-performance distributed deployments, and serve as a trusted technical advisor to clients. This position offers the opportunity to directly influence product strategy, mentor junior engineers, and drive successful integrations for high-profile financial institutions.

Before proceeding with your application, please ensure you have reviewed the CONSENT NOTICE FOR HR AND RECRUITING provided by OneMarketData. We greatly appreciate your attention to this.

What You’ll Do:

• Lead architecture, customization, and deployment of OneTick-based solutions for high-profile clients.
• Design advanced ETL frameworks and oversee performance tuning.
• Serve as technical advisor to clients, guiding integration strategy and best practices.
• Mentor junior and mid-level engineers, reviewing code and solutions.
• Coordinate with product development to influence the roadmap based on client needs.
• Troubleshoot high-complexity issues across distributed, containerized systems.
  
• Work with onetick py - proprietary Python library built on top of our core product, timeseries database called onetick (syntax and principles similar to pandas and SQL).
• Drive the group of developers within the team and support leadership with the establishment of processes.
  

What We’re Looking For:

• Expert-level Python with 5+ years of experience and with a proven track record in large-scale ETL/pipeline development.
• 3+ years’ experience in data engineering (including data mapping), ideally with financial markets or time-series data, is a significant plus.
• AWS, Kubernetes, and Airflow skills - significant plus.
• Deep understanding of distributed systems and performance optimization.
• Excellent client-facing skills with ability to translate business needs into technical solutions.
• Prior team leadership experience strongly preferred.
• Experience with team processes, workload planning, and team management.
• Experience in collaboration with other teams and streamlining cross-team processes.

What We Offer:

• Full-Time Permanent Employment with a flexible work arrangement 
• Collaborative Work Environment: Work in a mid-sized company with a supportive culture where your contributions are valued. Experience a low-bureaucracy environment that encourages autonomy and impact.
• Challenging Projects: Engage with high-impact tasks for major financial market players, including national regulators, central banks, and quantitative hedge funds.
• Competitive Compensation: Salary based on experience, education, skillset, and local norms, with additional benefits discussed during the HR screening call.
• Benefits Package: Benefits may vary based on location and country-specific requirements.
  
  
  

Work Location & Hybrid Model

This role follows a hybrid work model and requires regular in-office collaboration. Candidates should be based within commuting distance of one of our offices:

Belfast – The Weaving Works, Ormeau Avenue, Northern Ireland

Dublin –  1 George’s Quay Plaza, Dublin 2, Republic of Ireland

*Please note we don't provide visa sponsorship, you must have full independent working rights (e.g. citizenship, permanent residency, or a pre-existing, unrestricted work permit).

Equal Employment Opportunity

As an Equal Employment Opportunity (EEO) Employer, OneMarketData prohibits discriminatory employment actions against and treatment of its employees and applicants for employment based on actual or perceived race or color, size (including bone structure, body size, height, shape, and weight), religion or creed, alienage or citizenship status, sex (including pregnancy), national origin, age, sexual orientation, gender identity (one’s internal deeply-held sense of one’s gender which may be the same or different from one’s sex assigned at birth); gender expression (the representation of gender as expressed through, for example, one’s name, choice of pronouns, clothing, haircut, behavior, voice, or body characteristics; gender expression may not conform to traditional gender-based stereotypes assigned to specific gender identities), disability, marital status, relationship and family structure (including domestic partnerships, polyamorous families and individuals, chosen family, platonic co-parents, and multigenerational families), genetic information or predisposing genetic characteristics, military status, domestic violence victim status, arrest or pre-employment conviction record, credit history, unemployment status, caregiver status, salary history, or any other characteristic protected by law.

The position will require a background check, signed NDA, signed contract, and signed GDPR processor passthrough agreement (since we act as a data processor under GDPR). Salaries will be commensurate with experience, education, skillset, and local norms. Kindly note that only shortlisted candidates will be contacted for an interview.