Java Application Development Co. / Spring Boot done right — for enterprise systems that have to keep running

01Why teams call us

Five patterns that send Java projects sideways.

Java application development engagements typically start with one of these. The discovery call is about which one is yours.

01

The 14-year-old monolith nobody fully understands anymore

Java EE on JBoss, 1.2M lines, three engineers who know specific areas, no central architecture documentation. The compliance team wants Java 17 by year-end. Operations needs the deploy time to drop from 45 minutes to under 10. Nobody on the current team has shipped a Spring Boot app in production.

02

JVM tuning is on someone's todo list since 2022

Heap is wrong. GC pauses are visible in p99 latency. The g1gc tuning settings were copied from a 2015 Stack Overflow answer. Nobody on the team has time to do a real performance run with JFR + async-profiler. Meanwhile customer support is fielding "the app is slow" tickets every Tuesday afternoon when the batch job runs.

03

Spring Boot 2 → 3 upgrade keeps getting pushed

Jakarta EE namespace migration touches every package import. javax.servlet is dead. The Spring Security DSL changed. Three of your dependencies are still on Spring Boot 2 and the maintainers have gone quiet. Internal estimate is 8 weeks; nobody has had 8 weeks free in the last 18 months.

04

Microservices were supposed to fix things

The team broke up the monolith into 37 services. Now there is no central transaction handling, eventual consistency bugs surface in production, distributed tracing was supposed to ship "next quarter" for the last two years, and the platform team is burnt out. Walking it back partially is the right call — but who decides which services merge back?

05

Compliance audit found 60+ outdated dependencies

Log4j incident reopened the dependency hygiene question. CVE scanner now flags every PR. The team has not done a clean dependency update sweep in three years and many transitives are on EOL versions. Some upgrades require code changes; some are blocked by library maintainers who never released a fix.

02What we build

Four practice areas where we have shipped at scale.

Java application development priced by deliverable. Senior engineers only — minimum 8 years JVM experience on every engagement.

1

Legacy Java modernization

Java EE → Spring Boot 3, EJB → Spring beans, JSP → REST + SPA front end, Ant/Maven → modern Gradle. We do this incrementally with strangler-fig patterns — no big-bang rewrites, no weekend cutovers. Most engagements run 12-24 months with old and new systems in parallel for 6+ months.

$180,000 – $1.2M

2

Spring Boot 2 → 3 migrations

Jakarta EE namespace migration, Spring Security DSL updates, observability layer transition (Micrometer/OTel), Java 17/21 toolchain. We have completed this migration on 14 production codebases in the last 18 months. Flat-fee pricing based on codebase audit; no time-and-materials surprises.

$45,000 – $220,000

3

JVM performance engineering

Heap and GC analysis with JFR + async-profiler, allocation hot-path tuning, observability layer overhaul. Typical engagement reduces p99 latency 40-70% within 6 weeks. We provide a written diagnostic report before any code changes, so you can compare estimates from other vendors.

$38,000 – $145,000

4

Senior Java architect embedded

Principal-level Java architect placed inside your team for 6-12 months. Same standup, same Slack, same on-call rotation. Named individual on the contract. Architecture review, mentoring, PR review at the senior level. We have done this with Fortune 500 enterprise teams and series-B fintechs.

$24,000 / month

03How we run engagements

Four sprints from audit to deploy.

Same shape every time. Scope adjusts, the method does not. Java modernization without method becomes another stalled rewrite.

01.

Sprint 01

Codebase audit

Two-week paid assessment. Static analysis pass, dependency graph, JVM behavior under representative load, architectural debt inventory. Written report with specific remediation sequencing and effort estimates. Flat $18,500 fee whether we proceed or not.

02.

Sprint 02

Architecture

Architecture decision records for every non-trivial choice — service boundaries, transactional boundaries, observability strategy, dependency management policy. Includes test coverage targets and CI gate decisions agreed before any production code changes.

03.

Sprint 03

Engineering

Code in your repo from day one. Weekly demos to product and operations. Strangler-fig migrations run with old and new code paths behind feature flags. PR review by your team mandatory. Production deploys behind rollback gates.

04.

Sprint 04

Handoff

Three-week parallel period per service. Your team operates the modernized system, we shadow. Runbooks updated and tested. Performance SLOs documented. 30-day and 90-day check-ins post-handoff, then the system is yours.

05/What clients say

What our clients say.

"Handoff included runbooks and a shadow period. Six months later we have not had to bring them back."

— Elena Okafor, VP Technology at a Series A startup

"We had two failed prior engagements. The difference here was that they walked away from parts of the scope they could not own."

— Anders Rossi, Lead Engineer building a developer-tools company

"Friday demos, Monday changelogs, documented decisions. Felt like working with an internal team, not an outside agency."

— Owen Okafor, Chief of Staff at a vertical SaaS company

Java systems that run for a decade — and survive their original architects.