Notes from building, operating, and learning from software.https://geminikim.com/en-UShttps://geminikim.com/articles/use-reader-writer-patterns-as-options-not-rules/https://geminikim.com/articles/use-reader-writer-patterns-as-options-not-rules/Choose Reader, Writer, and tool-layer boundaries from code size, domain distance, legacy constraints, and team conventions—not imitation.Sat, 28 Dec 2024 00:00:00 GMTarchitecturelayeringdesign-patternshttps://geminikim.com/articles/delay-common-modules-until-boundaries-are-clear/https://geminikim.com/articles/delay-common-modules-until-boundaries-are-clear/Delay common modules until ownership is clear, and organize logging, exceptions, and shared protocols around concrete capabilities instead.Sat, 21 Dec 2024 00:00:00 GMTmodulesarchitecturemaintainabilityhttps://geminikim.com/articles/earn-trust-before-changing-a-new-team/https://geminikim.com/articles/earn-trust-before-changing-a-new-team/Adapt to a new engineering team through timely questions, visible progress, early review, and small evidence-based changes after trust is earned.Sun, 15 Dec 2024 00:00:00 GMTteamworkcommunicationcareerhttps://geminikim.com/articles/split-large-service-classes-by-responsibility/https://geminikim.com/articles/split-large-service-classes-by-responsibility/Split an oversized service by mapping concepts, tracing responsibilities, testing boundaries, and comparing concrete refactoring options.Sun, 08 Dec 2024 00:00:00 GMTrefactoringarchitectureobject-oriented-designhttps://geminikim.com/articles/separate-query-models-from-operational-tables/https://geminikim.com/articles/separate-query-models-from-operational-tables/Design operational tables around business concepts, then serve complex history and admin searches from a separate query model.Sun, 01 Dec 2024 00:00:00 GMTdatabasearchitecturequery-modelshttps://geminikim.com/articles/choose-enums-or-code-tables-by-change-rate/https://geminikim.com/articles/choose-enums-or-code-tables-by-change-rate/Use enums for stable values and focused tables for frequently changing ones without turning one common-code table into a dumping ground.Sun, 24 Nov 2024 00:00:00 GMTdata-modelingenumsdatabaseshttps://geminikim.com/articles/separate-data-access-by-domain-boundary/https://geminikim.com/articles/separate-data-access-by-domain-boundary/How separate entity and repository boundaries can protect core rules from integration code even when both areas share one database table.Mon, 18 Nov 2024 00:00:00 GMTarchitecturedata-accessdomain-boundarieshttps://geminikim.com/articles/design-immutable-records-with-append-only-data/https://geminikim.com/articles/design-immutable-records-with-append-only-data/An append-only repayment example that makes history and synchronization clearer, along with the storage and query costs it introduces.Mon, 11 Nov 2024 00:00:00 GMTdata-modelingdatabasesoperationshttps://geminikim.com/articles/discover-domain-concepts-in-everyday-artifacts/https://geminikim.com/articles/discover-domain-concepts-in-everyday-artifacts/How a utility bill revealed a missing delinquency concept in a repayment model and why everyday artifacts can guide software design.Mon, 04 Nov 2024 00:00:00 GMTdomain-modelingsoftware-designproblem-solvinghttps://geminikim.com/articles/rank-domain-concepts-to-focus-design/https://geminikim.com/articles/rank-domain-concepts-to-focus-design/Identify a small first tier of domain concepts, separate supporting flows, and spend limited design time on the service's center.Mon, 28 Oct 2024 00:00:00 GMTdomain-modelingarchitectureprioritizationhttps://geminikim.com/articles/grow-as-a-developer-through-varied-experience/https://geminikim.com/articles/grow-as-a-developer-through-varied-experience/How varied experience, repeated attempts, and business awareness help developers solve unfamiliar problems and keep improving.Tue, 22 Oct 2024 00:00:00 GMTcareergrowthproblem-solvinghttps://geminikim.com/articles/fix-domain-boundaries-before-circular-dependencies/https://geminikim.com/articles/fix-domain-boundaries-before-circular-dependencies/Resolve confusing ownership and concept boundaries before using interfaces or dependency inversion to treat an apparent circular reference.Tue, 15 Oct 2024 00:00:00 GMTdomain-modelingarchitecturedependencieshttps://geminikim.com/articles/contain-messy-code-at-system-boundaries/https://geminikim.com/articles/contain-messy-code-at-system-boundaries/Contain unavoidable complexity in an explicit outer boundary so limited engineering time can protect the system's core concepts.Tue, 08 Oct 2024 00:00:00 GMTarchitectureboundariesmaintainabilityhttps://geminikim.com/articles/kotlin-jpa-new-entity-id-strategies/https://geminikim.com/articles/kotlin-jpa-new-entity-id-strategies/Compare nullable and zero-valued numeric IDs for Kotlin JPA entities, including new-entity detection, ambiguity, and verification.Tue, 01 Oct 2024 00:00:00 GMTkotlinjpapersistencehttps://geminikim.com/articles/learn-computer-science-through-engineering-work/https://geminikim.com/articles/learn-computer-science-through-engineering-work/Learn computer science through real engineering problems, then show the reasoning and improvements it made possible in your work.Wed, 25 Sep 2024 00:00:00 GMTcomputer-sciencecareerengineering-practicehttps://geminikim.com/articles/define-and-enforce-layering-rules/https://geminikim.com/articles/define-and-enforce-layering-rules/Define stable layer roles, constrain optional upper layers, and automate checks only when a team needs stronger enforcement.Wed, 18 Sep 2024 00:00:00 GMTarchitecturelayeringstatic-analysishttps://geminikim.com/articles/turn-production-incidents-into-shared-domain-knowledge/https://geminikim.com/articles/turn-production-incidents-into-shared-domain-knowledge/Use incident reviews, working notes, concept maps, and rotated operations to reduce domain knowledge gaps across a software team.Wed, 11 Sep 2024 00:00:00 GMTdomain-knowledgeteam-practiceoperationshttps://geminikim.com/articles/separate-runnable-apps-by-operational-role/https://geminikim.com/articles/separate-runnable-apps-by-operational-role/Separate public, admin, batch, and operations workloads into runnable applications without splitting the whole codebase into separate projects too early.Wed, 04 Sep 2024 00:00:00 GMTbackendarchitecturedeploymenthttps://geminikim.com/articles/name-readers-finders-and-searchers-by-behavior/https://geminikim.com/articles/name-readers-finders-and-searchers-by-behavior/Distinguish Reader, Finder, and Searcher classes by direct reads, added filtering, and composite searches rather than result count.Thu, 29 Aug 2024 00:00:00 GMTsoftware-designmaintainabilitybackendhttps://geminikim.com/articles/measure-before-replacing-outbox-polling/https://geminikim.com/articles/measure-before-replacing-outbox-polling/Evaluate outbox polling with realistic load tests, then consider a simpler application-level delivery path before adopting log tailing.Thu, 22 Aug 2024 00:00:00 GMTarchitectureperformanceeventshttps://geminikim.com/articles/publish-events-where-business-flow-is-visible/https://geminikim.com/articles/publish-events-where-business-flow-is-visible/Place event publication in the layer that understands the completed business action, while keeping implementation-specific cases explicit.Thu, 15 Aug 2024 00:00:00 GMTarchitecturedomain-eventslayeringhttps://geminikim.com/articles/compose-my-page-data-without-a-my-domain/https://geminikim.com/articles/compose-my-page-data-without-a-my-domain/Build My page summaries through a dedicated composition layer while keeping user, order, and product responsibilities in their proper domains.Fri, 09 Aug 2024 00:00:00 GMTbackendarchitectureapi-designhttps://geminikim.com/articles/modules-layers-and-architecture/https://geminikim.com/articles/modules-layers-and-architecture/Separate module boundaries from code-level layers and architectural style, then extract modules only when implementation needs stronger constraints.Fri, 02 Aug 2024 00:00:00 GMTarchitecturemoduleslayeringhttps://geminikim.com/articles/interfaces-after-concrete-design/https://geminikim.com/articles/interfaces-after-concrete-design/Start with concrete code, extract interfaces from proven variation, and keep one-to-one abstractions only when they create a real boundary.Fri, 26 Jul 2024 00:00:00 GMTarchitecturedesign-patternsmaintainabilityhttps://geminikim.com/articles/choose-hexagonal-architecture-for-a-reason/https://geminikim.com/articles/choose-hexagonal-architecture-for-a-reason/Choose hexagonal architecture when protocols, isolation, scale, or likely growth justify its extra structure—not because the label signals skill.Fri, 19 Jul 2024 00:00:00 GMTarchitecturesoftware-designhttps://geminikim.com/articles/track-database-changes-with-releases/https://geminikim.com/articles/track-database-changes-with-releases/Collect database changes with the issue and PR that need them, test them in development, and hand off the final release set before code deployment.Sat, 13 Jul 2024 00:00:00 GMTdatabasedeploymentoperationshttps://geminikim.com/articles/authorization-without-redundant-reads/https://geminikim.com/articles/authorization-without-redundant-reads/Resolve the logged-in user once, keep access checks focused, and separate system-wide administration from channel-level permissions.Sat, 06 Jul 2024 00:00:00 GMTauthorizationarchitecturetestinghttps://geminikim.com/articles/core-ownership-and-surrogate-keys/https://geminikim.com/articles/core-ownership-and-surrogate-keys/Centralize a shared registration rule in the core, escalate isolation only when needed, and keep changing business uniqueness out of the primary key.Sat, 29 Jun 2024 00:00:00 GMTarchitecturemodularitydatabasehttps://geminikim.com/articles/my-page-is-not-a-domain/https://geminikim.com/articles/my-page-is-not-a-domain/A My Page is a client-facing view, not a business domain. Keep orders, products, and coupons with their real owners and combine them at the boundary.Sat, 22 Jun 2024 00:00:00 GMTbackenddomain-modelingapi-designhttps://geminikim.com/articles/software-is-not-done-until-deployed/https://geminikim.com/articles/software-is-not-done-until-deployed/Stale pull requests and delayed releases make changes harder to review, deploy, diagnose, and roll back. Keep the path to production short and observable.Sun, 16 Jun 2024 00:00:00 GMTsoftware-deliverydeploymentproject-managementhttps://geminikim.com/articles/separate-shared-and-personalized-cache-state/https://geminikim.com/articles/separate-shared-and-personalized-cache-state/Compose a reaction status from reusable queries, then cache the shared count without leaking one member’s personalized state to everyone else.Sun, 09 Jun 2024 00:00:00 GMTarchitecturecachingperformancehttps://geminikim.com/articles/developer-career-lessons-from-failure/https://geminikim.com/articles/developer-career-lessons-from-failure/Career failures become useful when they change how you verify opportunities, value trusted referrals, and revise the rules you made from earlier setbacks.Sun, 02 Jun 2024 00:00:00 GMTcareerlearningresiliencehttps://geminikim.com/articles/model-guest-and-member-reaction-state/https://geminikim.com/articles/model-guest-and-member-reaction-state/Return public reaction counts and member-specific state through one read flow while keeping optional identity distinct from required authentication.Sun, 26 May 2024 00:00:00 GMTapiauthenticationarchitecturehttps://geminikim.com/articles/rebuild-first-migrate-second/https://geminikim.com/articles/rebuild-first-migrate-second/Design a replacement system around the problems it must solve, then handle legacy data through explicit migration mappings and retirement conditions.Mon, 20 May 2024 00:00:00 GMTarchitecturedatabasemigrationhttps://geminikim.com/articles/model-reactions-for-requirements-and-scale/https://geminikim.com/articles/model-reactions-for-requirements-and-scale/Turn a vague like-button request into a reaction model by clarifying policy, estimating data growth, and planning when count queries must change.Mon, 13 May 2024 00:00:00 GMTarchitecturedatabaseperformancehttps://geminikim.com/articles/decouple-ui-from-domain-models/https://geminikim.com/articles/decouple-ui-from-domain-models/A tree-shaped API does not require a tree-shaped domain. Keep the client contract at the presentation boundary and compose it from internal concepts.Mon, 06 May 2024 00:00:00 GMTbackendarchitectureapi-designhttps://geminikim.com/articles/split-client-server-responsibility-by-change-cost/https://geminikim.com/articles/split-client-server-responsibility-by-change-cost/Place display-only work near the UI, but centralize meaningful or changing values when multiple clients and shipped app versions make updates expensive.Tue, 30 Apr 2024 00:00:00 GMTapi-designclient-serverbackward-compatibilityhttps://geminikim.com/articles/keep-test-convenience-from-distorting-production-code/https://geminikim.com/articles/keep-test-convenience-from-distorting-production-code/Change production code when its behavior becomes clearer or legacy code needs a testing seam—not merely to expose values or methods that only tests use.Tue, 23 Apr 2024 00:00:00 GMTtestingrefactoringlegacy-codehttps://geminikim.com/articles/legacy-modernization-and-cache-operations/https://geminikim.com/articles/legacy-modernization-and-cache-operations/Choose legacy boundaries carefully, change them in small steps, and add a shared cache only after DB work and deployment failure modes are understood.Tue, 16 Apr 2024 00:00:00 GMTlegacycacheoperationshttps://geminikim.com/articles/reversible-design-against-overengineering/https://geminikim.com/articles/reversible-design-against-overengineering/Build the requirement in front of you, look only a little beyond it, and keep speculative structures cheap to expand, remove, or replace.Tue, 09 Apr 2024 00:00:00 GMTsoftware-designoverengineeringdata-modelinghttps://geminikim.com/articles/persuade-with-small-prototypes-and-evidence/https://geminikim.com/articles/persuade-with-small-prototypes-and-evidence/Diagnose why a proposal is blocked, build a small proof, strengthen your reasoning, understand the opposing case, and treat new technology as company risk.Wed, 03 Apr 2024 00:00:00 GMTcommunicationteamworktechnical-decisionshttps://geminikim.com/articles/entering-a-frozen-junior-developer-market/https://geminikim.com/articles/entering-a-frozen-junior-developer-market/In a tight 2024 hiring market, broaden the first-company search, turn real work into problem-solving evidence, and show reasoning rather than a technology list.Wed, 27 Mar 2024 00:00:00 GMTcareerhiringjunior-developerhttps://geminikim.com/articles/design-apis-for-clarity-not-rest-purity/https://geminikim.com/articles/design-apis-for-clarity-not-rest-purity/Use REST ideas where they improve an HTTP contract, but let client clarity, team consistency, domain boundaries, and change cost decide the API.Wed, 20 Mar 2024 00:00:00 GMTapi-designresthttphttps://geminikim.com/articles/validate-at-boundaries-keep-core-flows-simple/https://geminikim.com/articles/validate-at-boundaries-keep-core-flows-simple/Turn API input into complete business values at the presentation boundary, keep nulls out of inner flows, and validate stored data when it enters the system.Wed, 13 Mar 2024 00:00:00 GMTvalidationapi-designlayered-architecturehttps://geminikim.com/articles/move-from-si-to-product-development/https://geminikim.com/articles/move-from-si-to-product-development/A move from contract work to a product team depended on help and luck; the repeatable strategy is to study target job requirements and build relevant experience.Thu, 07 Mar 2024 00:00:00 GMTcareergrowthhttps://geminikim.com/articles/start-tests-then-refactor-them/https://geminikim.com/articles/start-tests-then-refactor-them/Start with the test that proves the behavior you care about, mock enough to make it run, and improve test design through repeated use and review.Thu, 29 Feb 2024 00:00:00 GMTtestingrefactoringbackendhttps://geminikim.com/articles/separate-api-requests-from-domain-models/https://geminikim.com/articles/separate-api-requests-from-domain-models/Convert external request objects into business-owned values at the presentation boundary so the API depends inward and the core never depends back.Thu, 22 Feb 2024 00:00:00 GMTbackendarchitectureapi-designmodularityhttps://geminikim.com/articles/performance-tests-from-traffic-and-failure-models/https://geminikim.com/articles/performance-tests-from-traffic-and-failure-models/Estimate volume and arrival patterns before choosing a load test, add deliberate headroom, and require evidence only where traffic risk justifies it.Thu, 15 Feb 2024 00:00:00 GMTperformancetestingoperationshttps://geminikim.com/articles/choose-foreign-keys-for-operational-reality/https://geminikim.com/articles/choose-foreign-keys-for-operational-reality/Choose foreign keys, indexes, and ORM mappings from integrity needs, incident response, deployment practice, and who operates the database.Fri, 09 Feb 2024 00:00:00 GMTdatabaseoperationsjpahttps://geminikim.com/articles/assign-cross-domain-actions-by-ownership/https://geminikim.com/articles/assign-cross-domain-actions-by-ownership/Before placing a caller-owned interface across modules, identify which domain owns the action and let callers depend on that capability.Fri, 02 Feb 2024 00:00:00 GMTbackenddomain-modelingmodularityhttps://geminikim.com/articles/keep-domain-enums-in-the-domain-module/https://geminikim.com/articles/keep-domain-enums-in-the-domain-module/Put a business enum with its domain, let storage depend inward, and use a small shared enum module only while the domain boundary is still emerging.Fri, 26 Jan 2024 00:00:00 GMTmodularityarchitecturedependencieshttps://geminikim.com/articles/design-provider-identity-and-auth-boundaries/https://geminikim.com/articles/design-provider-identity-and-auth-boundaries/How a small platform API resolves provider keys into a domain identity, separates tenant data, and chooses an authentication boundary that fits its scale.Fri, 19 Jan 2024 00:00:00 GMTapi-designbackendarchitecturehttps://geminikim.com/articles/place-cross-domain-work-by-business-ownership/https://geminikim.com/articles/place-cross-domain-work-by-business-ownership/Use business ownership, cohesion, imports, and a package-move experiment to place code that coordinates a primary action with another domain's rule.Sat, 13 Jan 2024 00:00:00 GMTpackagingdomain-modelingarchitecturehttps://geminikim.com/articles/jpa-domain-modeling-without-association-overload/https://geminikim.com/articles/jpa-domain-modeling-without-association-overload/A cautious way to map JPA entities: start with IDs, add associations only when lifecycles truly align, and model business concepts independently.Sat, 06 Jan 2024 00:00:00 GMTjpadomain-modelingbackendhttps://geminikim.com/articles/high-traffic-experience-without-traffic/https://geminikim.com/articles/high-traffic-experience-without-traffic/Build and operate a small service, create load deliberately, and show how you found and fixed bottlenecks without pretending a load test equals production experience.Sat, 09 Dec 2023 00:00:00 GMTperformancecareerbackendhttps://geminikim.com/articles/reliable-database-tests-with-testcontainers/https://geminikim.com/articles/reliable-database-tests-with-testcontainers/Choose mocks, an in-memory database, Testcontainers, or a real database by the failure you need to catch, while keeping ordinary tests isolated from shared infrastructure.Mon, 04 Dec 2023 00:00:00 GMTtestingdatabasesbackendhttps://geminikim.com/articles/dto-boundaries-between-layers/https://geminikim.com/articles/dto-boundaries-between-layers/Use DTOs where data crosses a boundary with a different contract. Mapping has a cost, but so does letting external request shapes define the inside of a service.Thu, 30 Nov 2023 00:00:00 GMTbackendarchitectureapi-designhttps://geminikim.com/articles/practical-git-commit-branch-rules/https://geminikim.com/articles/practical-git-commit-branch-rules/Split work before polishing commits, shape pull requests for reviewers, and leave a history that helps the next engineer understand changes and recover a release.Sat, 25 Nov 2023 00:00:00 GMTgitcollaborationsoftware-engineeringhttps://geminikim.com/articles/circuit-breaker-placement/https://geminikim.com/articles/circuit-breaker-placement/Circuit breakers, timeouts, cache fallbacks, and remote-call policies belong near the implementation that performs the I/O, while domain code chooses the required behavior.Tue, 21 Nov 2023 00:00:00 GMTbackendreliabilityarchitecturehttps://geminikim.com/articles/timeouts-retries-and-failure-propagation/https://geminikim.com/articles/timeouts-retries-and-failure-propagation/Design timeout, retry, and recovery policies from the user's waiting budget and the uncertainty of each failure instead of applying one retry rule everywhere.Thu, 16 Nov 2023 00:00:00 GMTbackendreliabilitydistributed-systemshttps://geminikim.com/articles/domain-maturity-and-module-boundaries/https://geminikim.com/articles/domain-maturity-and-module-boundaries/Domain maturity comes from understanding policy, behavior, and operating reality. Let those lessons reveal module boundaries instead of freezing guesses too early.Sun, 12 Nov 2023 00:00:00 GMTarchitecturedomain-driven-designbackendhttps://geminikim.com/articles/grow-software-in-stages/https://geminikim.com/articles/grow-software-in-stages/Start with working code, then extract functions, classes, packages, modules, and projects as real cohesion and scale make each stronger boundary necessary.Tue, 07 Nov 2023 00:00:00 GMTsoftware-designarchitecturemodularityhttps://geminikim.com/articles/cohesive-packages-with-modules-and-layers/https://geminikim.com/articles/cohesive-packages-with-modules-and-layers/Modules, packages, and architectural layers solve different problems. Package related behavior together and let layers describe roles without scattering a feature.Thu, 02 Nov 2023 00:00:00 GMTarchitecturemodularitypackaginghttps://geminikim.com/articles/frequent-dependency-upgrades/https://geminikim.com/articles/frequent-dependency-upgrades/Frequent, prioritized dependency upgrades keep change small, expose compatibility problems early, and prevent a maintained service from quietly accumulating debt.Sun, 29 Oct 2023 00:00:00 GMTdependenciesmaintenancetechnical-debthttps://geminikim.com/articles/software-that-survives-developer-departure/https://geminikim.com/articles/software-that-survives-developer-departure/Good company software reduces debt, fits the team's operating ability, and remains understandable and repairable after its original developer leaves.Tue, 24 Oct 2023 00:00:00 GMTmaintainabilityengineering-culturesoftware-designhttps://geminikim.com/articles/unit-tests-protect-business-intent/https://geminikim.com/articles/unit-tests-protect-business-intent/A business-layer unit test is useful when it guides design, records meaningful behavior, or makes the next developer reconsider a risky change.Fri, 20 Oct 2023 00:00:00 GMTtestingarchitecturemaintainabilityhttps://geminikim.com/articles/idempotent-ai-tool-calls/https://geminikim.com/articles/idempotent-ai-tool-calls/Retries are normal in distributed systems and AI workflows. Use database constraints, idempotency keys, and bounded retries to prevent duplicate side effects.Sun, 15 Oct 2023 00:00:00 GMTai-agentsbackendreliabilityhttps://geminikim.com/articles/premature-multi-module-complexity/https://geminikim.com/articles/premature-multi-module-complexity/Modules should enforce boundaries discovered through implementation, not freeze guessed domains or mirror an architecture diagram before the software is understood.Wed, 11 Oct 2023 00:00:00 GMTarchitecturemodularitysoftware-designhttps://geminikim.com/articles/gradle-dependency-boundaries/https://geminikim.com/articles/gradle-dependency-boundaries/Use Gradle implementation, api, runtimeOnly, and compileOnly deliberately to express module access, prevent accidental coupling, and preserve design intent.Fri, 06 Oct 2023 00:00:00 GMTgradlearchitecturemodularityhttps://geminikim.com/articles/operate-toy-project-for-real-users/https://geminikim.com/articles/operate-toy-project-for-real-users/A toy project becomes service experience only after launch: pick one goal, find real users, watch retention, and learn when to stop.Mon, 02 Oct 2023 00:00:00 GMTproductoperationsside-projecthttps://geminikim.com/articles/isolate-admin-from-domain/https://geminikim.com/articles/isolate-admin-from-domain/Admin APIs have different queries, mutation needs, and release risks. Isolate them by module or repository instead of letting operational convenience reshape the core service.Wed, 27 Sep 2023 00:00:00 GMTarchitecturebackendadminhttps://geminikim.com/articles/reader-writer-business-flow/https://geminikim.com/articles/reader-writer-business-flow/Reader and writer components can hide storage details, narrow change, and let the business layer show policy, but only when the software's lifetime justifies them.Fri, 22 Sep 2023 00:00:00 GMTsoftware-designbackendmaintainabilityhttps://geminikim.com/articles/trace-id-across-distributed-services/https://geminikim.com/articles/trace-id-across-distributed-services/Logs become operationally useful when one request can be followed across HTTP calls and asynchronous events without exposing sensitive data or flooding storage.Mon, 18 Sep 2023 00:00:00 GMTobservabilitydistributed-systemsbackendhttps://geminikim.com/articles/define-problems-from-user-perspective/https://geminikim.com/articles/define-problems-from-user-perspective/Problem-solving improves when you separate technical load from product value, launch what you build, and keep asking why a user would choose it.Wed, 13 Sep 2023 00:00:00 GMTproductcareerproblem-solvinghttps://geminikim.com/articles/reuse-below-use-case-layer/https://geminikim.com/articles/reuse-below-use-case-layer/When use cases call one another for reuse, business changes spread and cycles follow. Compose above them or extract focused implementation components below them.Sat, 09 Sep 2023 00:00:00 GMTarchitecturebackendsoftware-designhttps://geminikim.com/articles/experience-over-development-jargon/https://geminikim.com/articles/experience-over-development-jargon/Theories and patterns are useful references, but a developer still needs to explain the code, its tradeoffs, and what happened when it was operated.Mon, 04 Sep 2023 00:00:00 GMTcareersoftware-designcollaborationhttps://geminikim.com/articles/split-large-service-class/https://geminikim.com/articles/split-large-service-class/Use constructor dependencies and imports to diagnose an oversized service, then separate cohesive responsibilities before adding another architecture label.Thu, 31 Aug 2023 00:00:00 GMTbackendrefactoringarchitecturehttps://geminikim.com/articles/normalization-from-requirements/https://geminikim.com/articles/normalization-from-requirements/Database normalization is not a score to maximize. Decide from change semantics, query cost, and the relationships the data is meant to preserve.Sat, 26 Aug 2023 00:00:00 GMTdatabasebackenddesign