Java · Spring · Latvia, EU

Senior Java engineers for systems that must be fast and correct

Java consulting and development for teams that need backend depth: Spring Boot platforms, high-throughput and low-latency services, messaging, and the modernization of systems that have outgrown their design.

Dedicated Java / Spring Boot developers, or a fixed-scope build
Low-latency and high-frequency trading experience
Kafka, Netty, ZeroMQ and event-driven architecture
EU company, NDA first, your repositories and your cloud

Java 21Spring BootKafkaLow latency

Tell us about your project

Describe your stack and the problem. A senior engineer replies.

Prefer email? Write to [email protected].

Java-firstJava 21, Spring Boot, production backends

Low latencyEngineers from high-frequency trading systems

Messaging depthKafka, Netty, ZeroMQ, Vert.x, WebSockets

EU companySIA Dreambox, Latvia. GDPR-aware delivery

What we do

Java work where the engineering is the hard part

Java & Spring development

Services, APIs and data layers on Spring Boot, built to be correct, observable and maintainable by your team afterwards.

High-frequency & low-latency

Market data, order flow and pricing engines: concurrency, memory behaviour, GC and the network path.

Messaging & event-driven

Kafka, ZeroMQ, Netty and Vert.x based pipelines with ordering, back-pressure and failure handling designed in.

Modernization & transformation

Java and Spring upgrades, monolith-to-modular migration and incremental rewrites without stopping the business.

Architecture consulting

Architecture reviews, performance audits and technical due diligence with written findings you can act on.

Cloud & DevOps

Docker, Ansible, CI/CD and monitoring so the system that works on a laptop also runs well in production.

Engagement models

Pick how you want to work with us

Dedicated team

Java engineers who join your roadmap, tickets and release process. Best for continuous product development.

Fixed-scope build

A defined system or component delivered end to end with a clear scope, milestones and handover.

Consulting & review

Architecture review, performance tuning or due diligence before you commit budget or hire.

How it works

From first call to production

Intro call

You describe the system and the problem. We tell you honestly whether and how we can help.

Scope & proposal

Team shape, engagement model, first milestones and risks, in writing.

Start building

Engineers get access, read the code and deliver a first working slice early.

Ship & operate

Release, monitor, tune. Scale the team up or down as the roadmap changes.

Stack

The tools we work with every day

Language & runtime

Java 21Virtual threadsConcurrency & memory modelJVM tuning

Frameworks

Spring Boot 2 / 3Spring SecuritySpring Data / HibernateSpring WebSocketVert.xNetty

Messaging & transport

Apache KafkaZeroMQWebSocketCustom binary / TCP protocolsIn-process event buses

Data

PostgreSQLMySQLClickHouseRedisTick and time-series stores

Delivery & operations

Gradle multi-module buildsDockerAnsibleCI/CDMicrometer / Prometheus

Track record

Java systems where speed and correctness both matter

FinoptsModular Java framework for high-frequency trading, market data feeds and aggregation

ClickOptions.aiCrypto options trading platform: liquidity provider adapters, aggregation, tick store, trade services

Exchange connectivityAdapters for crypto exchanges such as Binance, Bybit, OKX and Deribit over WebSocket and REST

Trading platformsOur engineers have worked on forex, CFD and digital-asset platforms

Finopts, Knowio.ai and ClickOptions.ai are Dreambox engineering projects. Exchanges and platform types are mentioned to describe the systems our team has integrated with or worked on, not as client relationships or endorsements.

FAQ

Common questions

Can you take over or extend our existing Java codebase?

Yes. Most engagements start with reading and running the existing code. We add features, remove bottlenecks and clean up as we go, without proposing a rewrite unless the code leaves no other option.

How is a dedicated team set up?

We agree the roles you need (for example two backend engineers and a tech lead), the hours of overlap and the working process. The team works in your repositories, tickets and release process. You steer priorities; we handle delivery.

Do you only do trading systems?

No. Trading and fintech shaped our engineering habits, but the same skills (concurrency, messaging, correctness, operations) apply to payments, telecom, logistics, IoT and any backend with demanding load.

Which Java and Spring versions do you work with?

Everything from older Spring Boot 2 codebases to current Java 21 and Spring Boot 3. We also do the upgrades between them.

What about IP and confidentiality?

The code you pay for is yours. We sign an NDA before you share details and can work inside your repositories and cloud accounts.

Can you also add AI features?

Yes, we build LLM integrations and MCP servers in Java as well, but it is a side capability. Our core is Java consulting and backend engineering.

What does it cost?

It depends on team size and engagement model (dedicated team, fixed-scope build or consulting). Tell us what you need and we reply with a clear proposal.

Next step

Let's talk about your Java project.

Share your stack and the problem. You will get a direct answer from an engineer.

Request a call [email protected]