Java Consulting · London
Java Consulting in London
Java advice for London organisations, where a large share of performance complaints are configuration rather than code. The runtime has substantial tuning surface — heap sizing, garbage collector choice, how it perceives the resources available to it — and an application running badly in a container is frequently one that was never told what it had.
Why this comes up
The problem
The service is restarted regularly for memory reasons, and nobody has looked at how the runtime is configured.
What you get
What we deliver
- Runtime configuration reviewed against the resources actually allocated
- Garbage collector chosen for the workload rather than left at whatever defaults
- Heap and memory limits set so the runtime and the container agree
- Actual behaviour profiled before any code is optimised
- Version position established, since long-term releases have defined support
- Build and dependency management rationalised where it has accumulated
Want this scoped for your business in London?
Thirty minutes, no charge, no sales script. You leave with a written summary of what java consulting would actually involve — whether or not you use us.
Working in London
London
London clients usually come to us because they want senior people actually on their project rather than a large agency's B team, and because Midlands rates buy considerably more delivery per pound.
Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates.
Sectors we work with in London
- Financial Services
- Professional Services
- Technology
- Media
- Hospitality
- Retail
What we work with
Technologies and platforms
- Java
- JVM
- Maven
- Spring Boot
Who we work with
Industries we serve
- Financial services
- Insurance
- Manufacturing
- Public sector
- Enterprise software
Why us
Why London businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in London
Looking for the full picture? See our Java Consulting services, everything we do in London or browse everything we do.
Java Consulting in London — common questions
- Why does container configuration cause problems?
- Because the runtime sizes itself from what it believes is available. Where its view and the container's limit disagree, it plans for more memory than it can have — and the result is a process terminated by the platform rather than an error you can read.
- Does the garbage collector choice matter?
- For latency-sensitive services, considerably. Collectors trade throughput against pause time differently, and a service where occasional pauses are unacceptable benefits from a deliberate choice — while for batch work the default is usually fine.
- Should we profile before optimising?
- Always. Java performance intuition is unreliable because the runtime optimises aggressively at execution time, so code that looks expensive may cost nothing and the actual hot path is frequently somewhere nobody suspected.
- How should we handle versions?
- Target long-term support releases and move between them deliberately. The cadence is published with defined support windows, and staying on a supported release is considerably cheaper than recovering from several versions behind. It also matters commercially, since some distributions charge for extended support on versions that have passed their free maintenance window.
- Do you work with businesses across Greater London?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout London, including London and the surrounding Greater London area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of London businesses do you usually work with?
- Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates. Beyond that we work across Financial Services, Professional Services, Technology, Media, Hospitality and Retail.
- Do you cover the areas around London?
- Yes — we work throughout London, including Reading, Milton Keynes, Cambridge, Brighton. London is an urban area of roughly 9,000,000+, and we take on work across the wider Greater London region rather than the city boundary alone.
Talk to us about Java Consulting in London
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise