SGI
Senior Java Software Engineer | London, Hybrid
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Senior Java Software Engineer | London, Hybrid
Senior Java Software Engineer | London, Hybrid
We're partnered with a highly respected technology consultancy trusted by some of the world's leading financial institutions to solve complex engineering challenges.
They’re looking for an experienced Senior Java Engineer with a passion for:
- High-performance systems
- JVM optimisation
- Low-latency software engineering
If you thrive on understanding software at the deepest level and enjoy squeezing every ounce of performance from your code, this role is a perfect fit.
Role Overview
📍 Location: London City (Hybrid working – at least 2 days per week in-office/on-site) ⌛ Type: Permanent 💷 Compensation: Excellent salary + benefits package
Key Responsibilities
You’ll collaborate with industry-leading engineers to design, build, and optimise mission-critical applications where performance is non-negotiable.
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- Build and enhance high-performance Java applications
- Analyse, benchmark, and optimise system performance
- Identify bottlenecks in applications and JVM workloads
- Drive latency reduction, throughput improvement, and system efficiency
- Work on both greenfield development and existing production systems
- Deliver measurable performance improvements through technical collaboration
Requirements
Essential
- Degree in Computer Science or related field from a reputable university
- Strong commercial Java development experience
- Proven hands-on experience in high-performance and low-latency systems
- Deep, practical expertise in JVM internals, including:
- Garbage collection
- Concurrency & threading
- Memory management
- Experience profiling and tuning applications for optimal performance
- Strong analytical and problem-solving skills
- Excellent communication—able to engage with both technical and non-technical stakeholders
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Nice-to-Have
- Industry experience in banking, trading, or fintech
- Prior work in a consultancy or client-facing environment
WhyJoin?
This is the chance to:
- Tackle genuinely challenging engineering problems with a team that values technical excellence over hierarchy
- Influence design decisions and contribute ideas that directly improve system performance
- Work on projects where your expertise drives measurable impact
If this role excites you, please apply directly with your updated CV.
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Jessica, London
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