Lead Quantitative Java Engineer

About Phi Partners
Phi Partners is the European market leader for capital markets technology services providing technology & quant services, solutions, and expertise to buy-side and sell-side financial institutions including some of the world's largest investment banks, hedge funds and asset management firms. Founded in 2004 and headquartered in London, Phi has a presence in all major continents. Our niche focus on Quantitative and Front Office Technology has been a differentiator and gateway into the world's best financial institutions.

Phi Partners has nearshore Centres-of-Excellence which are specialised in respective 'Lines of Business' (LoBs). Our latest Budapest Centre-of-Excellence, houses our Quant, Front Office & Risk Technology Services teams. Our services include front office pricing, risk engineering as well as quant model development, model integration and model validation. Consultants in this location have the opportunity to be mentored by well-known industry-leading Front Office, Risk & Quantitative experts, and work for a variety of top-tier clients including the world's largest Investment Banks, Asset Management Companies, and market-leading Hedge Funds.

About The Practice
As part of our partnerships with various clients, we are currently expanding our quant & technology teams to keep pace with the rapid growth in this business.

Our consultants gain exposure to a variety of projects across asset classes as well as coverage areas (such as front office, pricing & analytics, risk methodology, model validation and more), with each project typically taking 12 to 18 months. As a firm we engage in a wide range of services including but not limited to:

• Front office development and engineering (including directly supporting the trading desks, Pricing & Risk engines)
• Quantitative development which includes refining and optimising the code developed by model developer.
• Quantitative IT work such as improving the backend infrastructure and computation platform

About The Role And Responsibilities
The consultant will be working closely with key business stakeholders, development, and analytical teams to understand the business requirements and work towards enhancing our clients Front Office, eTrading & Risk Management Systems.

Main responsibilities will include developing code, blending it together to be run under single scenario, building various algorithms, along with investigating and explaining differences in results between potential legacy and newly developed systems

Key Skills

To be successful in this role, the ideal candidate will combine deep Java engineering expertise with a strong understanding of financial markets and quantitative systems. They should be comfortable building scalable, high-performance applications that support pricing, risk, and analytics workflows in a front-office or risk context.

• Strong enterprise Java development (JDK 11+), with expertise in JVM internals, memory management, and performance tuning
• Experience with multithreading, concurrency, and high-throughput systems
• Hands-on with Spring/Spring Boot, Hibernate/JPA, messaging (Kafka, JMS, Solace), and caching (Redis, Ignite)
• Skilled in database design and query optimisation (PostgreSQL, SQL Server) for analytical workloads
• Exposure to market data and reference data systems, including ingestion, validation, and distribution
• Familiarity with pricing, risk, and trade lifecycle concepts across asset classes
• Able to integrate and productionise quantitative models in collaboration with quants
• Understanding of numerical techniques such as Monte Carlo simulation, sensitivity analysis, and basic optimisation
• Awareness of data quality practices: anomaly detection, reconciliation, and SLA monitoring
• Experience with Python or similar for data analysis or prototyping
• Strong grasp of DevOps and enterprise practices: CI/CD, Docker/Kubernetes, observability, cloud (AWS/Azure)
• Proven problem-solving ability in capital markets environments, with strong stakeholder communication
• Experience working in global teams and mentoring junior engineers

Next steps

This is an excellent opportunity to join a world-leading Front Office & Quantitative technology consultancy which offers the chance to accelerate your career by working with multiple elite financial institutions. If you are interested in the opportunity, kindly send a copy of your up-to-date CV via email to We look forward to having a call to discuss this in more detail at your earliest convenience.