Spring Cloud provides tools for building distributed microservices. I use Spring Cloud Netflix Eureka for service discovery—services register themselves and discover others dynamically. Ribbon enables client-side load balancing. Feign creates declarat

Optimized Docker images reduce build time, storage, and attack surface. Alpine-based images start at 5MB versus 100MB+ for Debian. Multi-stage builds separate build tools from runtime—final image contains only production artifacts. Layer ordering matt

RSpec provides powerful testing tools for behavior-driven development. Shared examples reduce duplication across similar specs—I extract common behavior into reusable examples. Contexts organize tests by different scenarios. Let blocks lazily evaluate

CSS Grid provides two-dimensional layout control for rows and columns simultaneously. I use display: grid to create grid containers. The grid-template-columns and grid-template-rows properties define track sizes. The fr unit distributes available spac

EncryptedSharedPreferences secures simple key-value data using Android Keystore. I create instances with EncryptedSharedPreferences.create() specifying encryption schemes. The master key uses MasterKeys or MasterKey.Builder for automatic key generatio

Java Records (JDK 14+) provide concise syntax for immutable data carriers. Records automatically generate constructor, getters, equals, hashCode, and toString. I use records for DTOs, value objects, and API responses. Records are final and all fields

GitLab CI/CD uses .gitlab-ci.yml for pipeline configuration. Pipelines consist of stages that run sequentially. Jobs within the same stage run in parallel. The image key sets the Docker image for each job. variables define global or job-level environm

Glide efficiently loads and caches images from network, disk, or resources. I use Glide.with(context).load(url).into(imageView) for basic loading. Transformations apply effects—centerCrop(), circleCrop(), RoundedCorners(). Placeholders show during loa

Spring Data provides elegant pagination and sorting mechanisms. Pageable interface defines page number, size, and sort parameters. Page wraps results with metadata—total elements, total pages, current page. Sort defines ordering by multiple properties

Passwords should never be encrypted for later recovery. I store slow one-way hashes, tune work factors for current hardware, and maintain a rehash path when users log in with older credentials. Argon2id is my first choice for new systems, while bcrypt

LATERAL joins enable correlated subqueries in FROM clause. Each row can reference previous table columns. I use LATERAL for top-N-per-group queries. CROSS JOIN LATERAL iterates for each row. LEFT JOIN LATERAL includes rows without matches. Understandi

Normalization eliminates redundancy and anomalies. 1NF requires atomic values—no arrays in columns. 2NF eliminates partial dependencies—all non-key columns depend on entire primary key. 3NF removes transitive dependencies—non-key columns don't depend