Java Software Developer

Fasanara; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Bonus scheme

Medical & dental insurance

Life insurance

EAP

Pension

Maternity/paternity leave

Parental leave

Cycle to work

Charity giving

Wellbeing budget

Team socials

Job summary

Fasanara Digital in London is seeking a skilled Java Software Engineer to join a small, high-performing team supporting our 24/7 trading activity. You will own the development of our multi-venue collateral management platform and related data pipelines.

You will work primarily in Java and Kotlin on both new development and production systems, collaborating with investment stakeholders to deliver robust, scalable solutions for digital assets and traditional markets.

Qualifications

• At least 5 years of professional software engineering experience.
• Strong commercial Java experience.
• Experience designing and developing distributed systems.
• Experience with real-time, event-driven, and high-availability production systems.

Responsibilities

• Develop, maintain, and enhance the multi-venue collateral management system supporting 24/7 trading activity.
• Build resilient distributed, real-time, and event-driven systems with high-availability requirements.
• Integrate with trading venues to source account, position, collateral, and other operational data.
• Design reference data frameworks and accounting pipelines for traditional and digital assets.
• Develop primarily in Java and Kotlin, contributing to architecture while remaining hands-on.
• Maintain, refactor, and improve existing production code alongside new features.
• Own technical problems end-to-end from design to production delivery.
• Collaborate with engineers and investment stakeholders to translate business needs into technical solutions.
• Utilize AI-assisted development tools to boost productivity and software quality.

Skills

Java

Kotlin

Distributed systems

Real-time systems

High availability

Tools

Kafka

Apache

Python

Job description

Fasanara Digital is a quantitative investment team applying a scientific, high frequency investment style in digital assets, seeking to achieve exceptional risk-adjusted returns for our investors. We were founded in 2018 and have grown to a 30-person strong team, managing over $500m USD in a basket of fully delta-neutral trading strategies. Our team members come from diverse backgrounds. We are fully dedicated to building out our globally deployed, 24/7 availability trading platform, which allows us to capture trading opportunities on >15 crypto liquidity venues, and maintain our position as one of the top trading firms in the crypto industry.

Our Culture

We are strong believers in meritocracy, and we seek to reward people based on impact, judgement, and excellence in execution. We keep bureaucracy to a minimum, so decisions are made quickly and people have real ownership. Our environment is collaborative, inclusive, entrepreneurial, and built on trust. We set ambitious goals, work hard in a focused and sustainable way, and place a strong emphasis on teamwork, integrity, and quality in everything we do. We know we are only as good as our people, so we are deliberately building the firm around exceptional talent and diverse perspectives, and we support our leaders to grow, influence, and shape the future of the business.

The Role

We are looking for an experienced Java Software Engineer to join Fasanara Digital and take significant ownership of systems supporting our 24/7 trading activity.

The role will focus on the development and maintenance of our multi-venue collateral management platform, alongside new reference data and accounting infrastructure supporting both digital assets and traditional financial markets.

This is a hands-on engineering role within a small, high-performing team where engineers have a high degree of ownership and autonomy. You will work across both new development and existing production systems, designing new solutions while maintaining, improving, and scaling established code.

The successful candidate will ideally bring experience from financial services, trading, banking, or digital assets, although strong distributed systems experience from another high-performance environment will also be considered.

Responsibilities

• Develop, maintain, and enhance our multi-venue collateral management system supporting 24/7 trading activity.
• Build resilient distributed, real-time, and event-driven systems with high-availability requirements.
• Build and maintain integrations with trading venues to source account, position, collateral, and other operational data.
• Design reference data frameworks and accounting pipelines supporting both traditional financial instruments and digital assets.
• Develop primarily in Java and Kotlin, contributing to architecture and technical design while remaining highly hands-on.
• Maintain, refactor, and improve existing production code alongside developing new functionality.
• Take end-to-end ownership of technical problems, from design through to production delivery and ongoing support.
• Work closely with engineers and investment stakeholders to translate business requirements into effective technical solutions.
• Use modern AI-assisted development tools to improve engineering productivity and software quality.

Essential

• At least 5 years of professional software engineering experience.
• Strong commercial Java experience.
• Experience designing and developing distributed systems.
• Experience working with real-time, event-driven, and/or high-availability production systems.
• Strong understanding of software engineering fundamentals, system design, and production reliability.
• Comfortable maintaining, debugging, and improving existing production code as well as developing new systems.
• Strong problem-solving and analytical skills.
• Ability to work independently and take ownership in a fast-paced, high-performance environment.
• Strong communication and collaboration skills.

Desirable

• Commercial Kotlin experience.
• Previous experience within financial services, trading, banking, hedge funds, or fintech.
• Experience within cryptocurrency or digital assets.
• Knowledge of crypto exchanges, trading venues, protocols, or market infrastructure.
• Experience developing collateral, position, accounting, market data, or reference data systems.
• Experience with Python.
• Experience with Apache, Kafka or other event streaming technologies.
• Experience using AI-assisted software development tools.
• Understanding of traditional financial instruments and financial market infrastructure.

Our benefits include:

• Performance-related Bonus Scheme
• Private Medical & Dental Insurance throughBupa(including children's cover)
• Life Insurance, Income Protection & Critical Illness Cover
• Employee Assistance Programme (EAP)
• Salary sacrifice pension withHargreaves Lansdown(currently matched up to 10%)
• Enhanced Maternity & Paternity Leave
• Emergency Parental Leave, Emergency Childcare & Nursery Benefit
• Cycle to Work Scheme
• Charity Giving through CAF
• Annual Wellbeing Budget
• Team socials, annual Summer & Christmas parties,and other events throughout the year