// freelance senior java specialist
I build distributed Java systems for banks, exchanges and large enterprises.
More than 20 years of exceptional track record in designing and implementing interoperable, distributed software solutions. Hands-on architect and engineer across banking, electronic trading, energy and aviation.
// core expertise
Senior engineering across the full enterprise stack.
I work hands-on as architect, lead engineer and solution designer. The list below is what I do day in, day out, not a buzzword cloud.
Distributed Systems
Designing systems that stay consistent, available and observable under real production load.
Microservices & REST
Cloud-native services with clean API boundaries, contract testing and zero-downtime deploys.
Identity & Access
OAuth2, OIDC, SAML and fine-grained authorization for regulated enterprise environments.
JEE & Java Platform
Two decades of Java, from JEE monoliths to Spring Boot, Kafka and reactive stacks.
// industries
Tier-1 track record across regulated industries.
I have delivered for organisations where downtime is measured in basis points and audits are not optional. Below: the domains I keep being asked to come back to.
Banking & Finance
Core banking integrations, payment rails, regulatory reporting for Tier-1 institutions.
Electronic Trading
Low-latency order routing, FIX gateways, market data pipelines for exchanges and brokers.
Energy
Trading platforms, grid telemetry, and settlement systems for utilities and energy desks.
Aviation
Operational systems and integration platforms for carriers including KLM.
I am a highly proficient software specialist focused on developing robust, interoperable and distributed software solutions. Most of my work sits at the intersection of complex business domains and high-volume technical infrastructure.
Day to day, that means designing service landscapes, writing the load-bearing code myself, and staying close enough to operations to know what actually breaks at three in the morning. I am not a slide-deck architect.
I work with teams that value technical precision, clean APIs, and pragmatic delivery. If that sounds like your environment, we will get along.
// tech stack
The toolbox.
Production experience, not a wishlist. The platforms, languages and tooling I have shipped with.
// services
How I can help.
Three ways I typically engage with clients. Each one fits a different stage of the work.
All servicesSolution Architecture
End-to-end design for distributed Java platforms. From discovery and trade-off analysis to a buildable blueprint your teams can execute.
Senior Hands-on Engineering
Embedded in your team as a senior IC. Pull requests, on-call rotations, design reviews, the lot. No ivory tower.
Technical Due Diligence
Independent assessment of an existing platform, codebase or vendor. Honest verdict on risk, debt and what it takes to fix it.
// let's talk
Got a Java problem worth solving?
If you are looking for a senior freelance Java specialist with a real Tier-1 track record, let me know what you are building. I respond within a working day.
or email hbjamil@gmail.com