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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Market Data Engineer - **Company:** Keyrus UK - **Location:** London, UK - **Experience:** Expert - **Salary:** £58,000.0 - £87,000.0 - **Contract:** Temporary contract - **Skills:** Query Performance, Application Programming Interfaces (APIs), Artificial Intelligence, Big Data, C++ (Programming Language), Databases, Data Validation, Information Engineering, Data Governance, Python (Programming Language), Linux System Administration, Enterprise Messaging Systems, Reference Data, Standard Sql, SQL Databases, Data Streaming, ZeroMQ (Concurrent Programming Libraries), Parquet, Pandas, Real Time Data, Apache Kafka, Vertica, Virtual Agents, Data Pipelines - **Published:** June 29, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=d0ed1b1dbd6cb7fa ## About the Role Do you have experience in SQL?, * You are highly detail-oriented and reliability-driven, understanding that data accuracy is critical to business and trading decisions. * You enjoy working with complex, real-time data systems and take pride in making them robust, scalable, and trustworthy. * You think in terms of systems and dependencies, not just individual components. * You are comfortable operating in high-stakes environments where latency, completeness, and correctness matter. * You take strong ownership of the pipelines and systems you build - you don't just deliver them, you maintain and improve them over time. * You can translate technical challenges into clear communication for non-engineering stakeholders, especially in business or trading contexts. * You are pragmatic and focused on delivering what the business actually needs, not just theoretical perfection. * You are comfortable working with large datasets and Linux-based environments, * +5 years working as a Data Engineer * Strong experience building production-grade data pipelines where reliability is critical * Proven exposure to financial market data environments (real-time feeds, formats, vendor data) * Experience working with large-scale datasets * Professional proficiency in English Technical & Professional Skills * Strong Python skills for data engineering, orchestration, and tooling (pandas, polars) * Hands-on experience with time-series / columnar analytics databases (ClickHouse, kdb+/q preferred) * Strong SQL and a solid understanding of time-series data modelling * Comfortable working in Linux environments * Understanding of market data feeds, formats, and vendor ecosystems * Strong ownership mindset with focus on reliability and maintainability * Ability to communicate effectively with business stakeholders Nice to Have * C/C++ for performance-critical components such as feed handlers or low-latency paths. * Experience with streaming & messaging systems (Kafka, Solace, Aeron, ZeroMQ) * Knowledge of market data protocols (FIX, FAST) and formats (Parquet, Arrow) * Experience working with vendor APIs * Background in financial services/trading environments ## Description * Build and maintain robust ingestion pipelines for real-time and historical market data, including exchange feeds, vendor sources (Bloomberg, LSEG/Refinitiv, ICE) and internal sources * Normalise and standardise heterogeneous feeds into consistent internal schemas, so downstream consumers never have to care where the data came from. * Integrate market and reference data with the client's internal systems, such as research libraries, backtesting infrastructure, risk, PnL, and security master * Own the data plumbing that decisions rely on: + Corporate actions + Symbology mapping + Point-in-time accuracy + Gap detection & reconciliation * Model and store time-series and tick data efficiently in ClickHouse and/or kdb+/q, balancing query performance, storage cost, and ingestion throughput * Build monitoring, alerting, and data quality frameworks to proactively detect issues, * You ensure data is accurate, complete, and available when it matters - especially in real-time contexts. * You proactively identify and fix issues through monitoring, alerting, and data quality checks before they impact users. * You design systems with a strong focus on performance, scalability, and resilience. * You balance engineering excellence with practical delivery, making smart trade-offs when needed. * You understand the importance of time-series data correctness (e.g. point-in-time accuracy, reconciliation, symbology consistency). * You build solutions that are maintainable and observable, not just functional. * You collaborate effectively with data consumers, analysts, and business stakeholders to ensure systems meet real-world needs. * You continuously improve pipelines, processes, and data quality to support better decision-making., At Keyrus, salary ranges reflect different levels of mastery and impact within the same role - not different job titles. * Bottom of the range You meet the core requirements and will need ramp-up time and support. * Middle of the range You are fully autonomous from Day 1 and deliver consistently. * Top of the range You are a reference for the role, mentor others, and raise the bar for the team. Final offers are based on experience, autonomy, scope, and market context, and are discussed transparently during the process. Responsible AI & Recruitment At Keyrus, all stages of our recruitment process are conducted and evaluated by human recruiters and interviewers. To support accuracy and efficiency, AI may occasionally be used internally by our team exclusively for note-taking purposes during interviews. AI is never used to make decisions. To ensure fairness, authenticity, and the protection of confidential and proprietary information, the use of AI tools by candidates during the recruitment process is strictly prohibited. Our commitment to responsible AI practices ensures that hiring decisions are based solely on each candidate's own skills, experience, judgment, and expertise. ️ Any use of AI assistance during the interview process may result in immediate disqualification from the recruitment process. ## Related Videos - [Parquet, Delta, Iceberg & Ducklake - An introduction for developers](https://www.wearedevelopers.com/videos/100075-parquet-delta-iceberg-ducklake-an-introduction-for-developers) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Advanced Typing in TypeScript](https://www.wearedevelopers.com/videos/496-advanced-typing-in-typescript) - [Tracking vehicles at scale](https://www.wearedevelopers.com/videos/1999-tracking-vehicles-at-scale) - [OLAP for AI Applications and why you should care](https://www.wearedevelopers.com/videos/100212-olap-for-ai-applications-and-why-you-should-care) - [From Messy Queries to Scalable Systems - How Data Engineering actually works](https://www.wearedevelopers.com/videos/100203-from-messy-queries-to-scalable-systems-how-data-engineering-actually-works) ## Related Articles - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Data Analyst Salary in the UK](https://www.wearedevelopers.com/magazine/278-data-analyst-salary-in-the-uk) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)