How to Hire Java Developers in 2026: A Practical Guide
A practical guide to hiring Java developers in 2026—what to look for, how to screen, salary ranges, and the interview questions that actually reveal real skill.
MW
Matthew Wojtowicz
Founder & Senior Java Developer
Founder and lead developer at Katyella, specializing in Java enterprise applications and staff augmentation for mission-driven organizations.
Areas of Expertise
- Java
- Spring Boot
- Enterprise Architecture
- Staff Augmentation
- Technical Leadership
Articles by Matthew Wojtowicz (26)
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- java
Java Stream API: The Complete Practical Guide
Master the Java Stream API: stream creation, intermediate vs terminal ops, collectors, parallel streams, and common performance pitfalls in production.
- java
- streams
- functional-programming
- backend
- spring-boot
Java Virtual Threads with Spring Boot: A Practical Guide
Learn how Java virtual threads work with Spring Boot 3.2+, when to use them, common pitfalls like thread pinning, and real performance benchmarks.
- java
- spring-boot
- virtual-threads
- concurrency
- spring-boot
GraalVM Native Image with Spring Boot: Faster Startup, Lower Memory
Build Spring Boot native executables with GraalVM: AOT compilation setup, reflection hints, Docker integration, and real startup/memory benchmarks vs JVM mode.
- spring-boot
- graalvm
- native-image
- java
- spring-boot
Spring Boot REST API Best Practices for Production
Spring Boot REST API best practices: HTTP status codes, exception handling, validation with @Valid, DTOs, pagination, API versioning, and OpenAPI documentation.
- spring-boot
- rest-api
- java
- best-practices
- spring-boot
Spring Boot Scheduling: @Scheduled, Cron Expressions, and Quartz Integration
Spring Boot task scheduling with @Scheduled, cron expressions, fixed rate vs fixed delay, Quartz for distributed jobs, and thread pool configuration.
- spring-boot
- java
- scheduling
- quartz
- spring-boot
Dockerizing Spring Boot: Multi-Stage Builds, Layered Jars, and Compose
Containerize Spring Boot apps with multi-stage Dockerfiles, layered jars, Docker Compose for local dev, and health checks that actually work.
- spring-boot
- docker
- java
- containerization
- spring-boot
Spring Boot Logging Best Practices: Logback, SLF4J, and Structured Logging
Master Spring Boot logging with Logback, SLF4J, structured JSON output, MDC request tracing, and log level strategies for production systems.
- spring-boot
- logging
- logback
- java
- spring-boot
Spring Boot Caching with Redis: A Practical Guide
Set up Spring Boot caching with Redis using the Spring Cache abstraction. Covers @Cacheable, serialization, TTL, eviction, and production pitfalls.
- spring-boot
- redis
- caching
- java
- spring-boot
Spring Boot Monitoring with Actuator and Prometheus: A Production Guide
Set up Spring Boot monitoring with Actuator, Micrometer, Prometheus, and Grafana. Covers custom metrics, health indicators, and production configuration.
- spring-boot
- monitoring
- prometheus
- actuator
- spring-boot
Spring Boot Security Best Practices: Authentication, JWT, and OAuth2
Spring Boot security configuration with Spring Security 6, JWT authentication, OAuth2, and method-level authorization. Practical patterns for production apps.
- spring-boot
- spring-security
- jwt
- oauth2
- spring-boot
Spring Boot Testcontainers Integration Testing: A Complete Guide
Spring Boot Testcontainers integration testing with PostgreSQL, Redis, and Kafka. Covers @ServiceConnection and container reuse patterns.
- spring-boot
- testcontainers
- integration-testing
- java
- spring-boot
Spring Boot Error Handling: A Practical Guide to @ControllerAdvice and ProblemDetail
Spring Boot error handling with @ExceptionHandler, @ControllerAdvice, RFC 7807 ProblemDetail, validation errors, and custom error pages.
- spring-boot
- java
- error-handling
- rest-api
- java
The Complete Guide to Migrating from Java 8 to Java 17
Step-by-step guide for migrating Java 8 applications to Java 17. Breaking changes, new features, performance improvements, and migration strategies explained.
- java
- migration
- java-17
- java-8
- spring-boot
Spring Boot Microservices: Architecture Patterns That Actually Work
Architecture patterns for Spring Boot microservices. Service discovery, API gateway, circuit breakers, and data management strategies for production.
- spring-boot
- microservices
- architecture
- patterns
- staff-augmentation
Choosing the Right Staff Augmentation Company: A Guide for Mission-Driven Organizations
Select the perfect staff augmentation partner by evaluating cultural fit, technical expertise, and quality guarantees for mission-driven teams.
- staff augmentation
- team building
- mission-driven
- technical expertise
- development-tools
Simplify Spring Boot Version Migration with OpenRewrite
Simplify Spring Boot Version Migration with OpenRewrite
- development-tools
- migration
- automation
- spring-boot
- development-tools
Three Tools to Keep Your Dependencies Up to Date in a Spring Boot Project
Three Tools to Keep Your Dependencies Up to Date in a Spring Boot Project
- dependencies
- spring-boot
- maintenance
- security
- spring-boot
Providing a GraphQL Endpoint in Spring Boot
Learn how to set up and implement a GraphQL endpoint in Spring Boot with schema definition, resolvers, and testing examples.
- spring-boot
- graphql
- api
- microservices
- best-practices
Lessons from Tailwind Labs: Exploring Contract Hiring for Small Teams
Lessons from Tailwind Labs: Exploring Contract Hiring for Small Teams
- contract-hiring
- team-building
- best-practices
- small-teams
- java
Java Evolution from 8 to 18: What Actually Matters for Modern Development
Real-world look at Java's evolution from 8 to 18. The features that changed how we write Java code and why upgrading isn't always straightforward.
- java
- platform evolution
- lambda
- modules
- spring-boot
Spring Boot and Spring Batch: Creating a Job Runner for Database Exports
Build a Spring Batch job that exports database records to CSV and trigger it via HTTP POST using Spring Boot's JobLauncher.
- spring-boot
- spring-batch
- data-processing
- java
- spring-boot
Spring Cloud Config: Centralized Configuration Management
Learn how to implement centralized configuration management in microservices using Spring Cloud Config Server.
- spring-boot
- spring-cloud
- microservices
- configuration
- staff-augmentation
Staff Augmentation: A Catalyst for Mission-Driven Companies
How staff augmentation helps mission-driven companies scale with specialized talent, stay agile, and focus on their core mission without full-time hiring.
- staff-augmentation
- mission-driven
- team-building
- business-strategy
- development-tools
Three Lombok Annotations You Should Know
Learn three essential Lombok annotations (@Getter/@Setter, @NoArgsConstructor/@AllArgsConstructor, @ToString) to reduce Java boilerplate code.
- lombok
- java
- development-tools
- annotations
- spring-boot
@SecondaryTable
Learn how to use the @SecondaryTable annotation in Spring Boot to map entities to multiple database tables effectively.
- spring-boot
- jpa
- database
- annotations