REST APIs
APIs that slot cleanly into your existing setup. Easy to use, easy to maintain, and built to scale as your traffic grows. Contract-first, documented, and tested before they ship.
- Spring Boot
- OpenAPI
- Contract tests
Selected work.
First, the services Shevato takes on through client engagements. Then a grouped tour through real projects we have delivered, mostly inside a large Spring Boot microservice estate and a long-running retail e-commerce platform.
Services we offer
Microservices architecture
Microservices that make your systems more flexible and easier to grow. Greenfield service bootstraps, BFFs, cross-service contracts, and the boring plumbing that holds it all together.
- Java 21
- Spring Cloud
- Resilience4j
Custom software
Every business is a little different. We deliver solutions that match your processes, your objectives, and the way your team actually works, including the integrations no template can predict.
- Java
- Vanilla JS
- JSP when needed
Cloud and infrastructure
From containerized deployments to cloud-native architectures, infrastructure that is reliable, observable, and cost aware. Build pipelines that get code from a branch to production safely.
- Docker
- Maven
- JFrog
- Jenkins
Architecture consulting
A second pair of eyes for choosing the right technologies, untangling legacy systems, and planning a roadmap that actually ships. Often a few sessions are enough to unblock a team.
- Spring
- Migrations
- Code review
Quality and security
Testing, code review, and security-conscious design baked in from the start. What ships works today and keeps working tomorrow, including under partner integrations and audits.
- JUnit
- Spring Security
- SonarQube
Backend and microservices
Five new Spring Boot services in one program
Bootstrapped V1 services for orders, freight, inventory, profiles, and observability under a single program of work. Contract-first OpenAPI definitions, generated cross-service clients, and contract tests that lock the HTTP responses, not just the behavior.
- Spring Boot 3.4
- Java 21
- OpenAPI
- Maven multi-module
Multi-tenant pricing with partner markup
Designed and shipped a multi-tenant pricing surface for an automotive product line, spanning a domain microservice and a backend-for-frontend. Owned the partner-markup model, the integration tests, and the post-launch fix for null pricing when no markup was configured.
- Spring Boot
- BFF pattern
- JPA
- Integration tests
Decoupling internal identities from customer account numbers
Rolled an auth-model change through more than ten services and shared libraries. Touched authentication, order, vehicle, and profile services plus the foundation, security, gateway, and web commons libraries. A platform-level migration that needed careful sequencing.
- Spring Security
- JWT
- Multi-repo
- Backwards compatibility
Fleet-wide library and parent-POM upgrades
Cut the platform over to a new validation library and led a wave of parent-POM bumps with breaking-change remediation across freight, inventory, and observability services. The kind of work that does not look exciting but keeps the whole estate moving forward.
- Maven BOM
- Spring Boot
- Bean Validation
Mainframe integration in a Spring Boot REST API
Routed dealership order-status workflows and warehouse traffic through a mainframe directly inside a Spring Boot REST API. Migrated warehouse logic out of a JSP monolith into the service so partner systems can talk to one clean endpoint.
- Mainframe
- Spring Boot
- JWT
- JDBC
Caching and exception architecture
Reintroduced response caching for partner data in a domain microservice, refactored a domain exception to extend a proper base hierarchy, and tightened error handling across the order and inventory services. Small, compounding wins that show up in SLOs.
- Spring Cache
- Resilience4j
- Error model
Retail and partner integrations
A partner orchestration service
Owned core pieces of a Spring Boot REST API that orchestrates orders and inventory between a leading national tire retailer and a long list of automotive marketplaces and partner platforms. Built the JWT auth layer, the order-invoice endpoint, inventory-search-per-product for a partner channel, and barcode tracking for a delivery integration.
- Spring Boot
- JWT
- Hibernate Validator
- Partner APIs
Storefront fixes and modernization
Shipped checkout and cart fixes across a large JSP storefront for a leading national tire retailer: credit-card promo math, gift cards in totals, vehicle selector edge cases. Drove SonarQube remediation across servlets and beans, and migrated video-logo data off legacy tables.
- JSP
- Java
- SonarQube
- Tomcat
Multiple dealer portals patched, hardened, and modernized
Cross-site work on a family of automotive dealer and partner sites. XSS hardening on search and modal params, vehicle-inspection equipment integration for two brands, privacy-beacon based blocking of third-party data transfers across six sites, and full HTTPS hardening of legacy JSPs.
- JSP
- Vanilla JS
- Security
- Privacy
Apache CXF gateway to partner systems
Worked the SOAP/CXF gateway that connects a leading national tire retailer to a number of B2B partner systems and aftermarket marketplaces. Warehouse and carrier wiring, order placement, rebate and freight calculations, part-number handling. Not glamorous, but the kind of service that absolutely cannot break.
- Apache CXF
- SOAP
- JAX-WS
- Java
Infrastructure, CI/CD, and tooling
Workspace bootstrap scripts for the whole repo set
Authored clone and pull workspace scripts inside a shared developer toolkit so that anyone joining the team can stand up the entire microservice repo set with a single command. Small footprint, high leverage.
- Bash
- Git
- Onboarding
Maven release plumbing sweep
Fixed an SCM-block typo across roughly thirty repos in one coordinated change so that release plugins could function correctly across the platform. The kind of cleanup that nobody notices until it breaks.
- Maven
- SCM
- Artifactory
Base images moved to a private Artifactory
Cut Docker base images over to a private Artifactory registry across multiple services, which is the kind of work that has to happen perfectly or every build in the organization breaks at the same time.
- Docker
- JFrog Artifactory
- CI/CD
JDK 8 to JDK 21 across legacy Tomcat apps
Helped move legacy JSP and servlet WARs from JDK 8 onto a current LTS, with the dependency upgrades and code adjustments that always come with that kind of jump.
- Java 21
- Tomcat
- Jakarta
Personal projects
Rising Seasons
A way to discover TV shows by the shape of their episode ratings: rising, consistent, slow-burn, big-finale, rebound. Static frontend, a build pipeline that enriches data from TVDB and TMDb, and a daily changelog so the front page is never stale.
- Static HTML
- Node build pipeline
- TVDB
- TMDb
MapTap Rivals
Daily MapTap.gg head-to-head tracker. Log scores against named friends and see win/loss records, streaks, averages, score trends, and per-rival dashboards in one place. Built because the official tools did not show rivalries the way we wanted.
- Vanilla JS
- Firestore sync
- Charts
Football H2H League
Head-to-head football match recorder with penalty shootout tracking, team selections, and comparison tables. Started as a way to settle a long-running rivalry, kept growing.
- Vanilla JS
- Firestore
- PWA
Gym Tracker
An installable PWA for logging workouts, building programs, and tracking progress over time. Service worker, offline support, and an achievement system that keeps people coming back.
- PWA
- Service Worker
- Firestore
Mario Kart Tracker
Mario Kart race tracker with player statistics, performance analysis, and a chart-heavy results view. Supports both Mario Kart 8 Deluxe and Mario Kart World. The original Shevato side project that pulled in the others.
- Chart.js
- Vanilla JS
- Firebase Auth