# DevOps > Selected Engineer ApS work demonstrating DevOps — the achievements that prove it. - [Led the software development of a GIS map application, driving revenue growth by 10x and positioning the product as a primary data asset.](https://advisory.engineer.company/portfolio/led-the-software-development-of-a-gis-map-24/) - [Streamlined CI/CD processes, saving 4,000 hours by introducing automation in software development pipelines.](https://advisory.engineer.company/portfolio/streamlined-ci-cd-processes-saving-4-000-hours-42/) - [Authored 578 go‑task automation targets spanning native, Docker and HTTPS dev modes, linting, testing, database and deployment.](https://advisory.engineer.company/portfolio/authored-578-go-task-automation-targets-70/) - [Set a zero‑warnings quality bar across six languages — Go, TypeScript, SQL, Python, Shell and Markdown — enforced by pre‑commit hooks.](https://advisory.engineer.company/portfolio/set-a-zero-warnings-quality-bar-across-six-79/) - [Set the platform's founding decisions in the weeks after the repository opened in November 2025 — the layering, database‑first data access and the zero‑warnings bar — and they still hold nine months on.](https://advisory.engineer.company/portfolio/set-the-platform-s-founding-decisions-in-november-2025-80/) - [Automated team collaboration, password management, task and time management, and built a semi‑automatic project‑showcase system, raising team productivity.](https://advisory.engineer.company/portfolio/automated-team-collaboration-password-management-task-and-time-89/) - [Built a layered automated test suite — 981 Go tests, 543 frontend and browser specs, 494 SQL behavioural tests — with mutation testing, property‑based tests and an accessibility gate.](https://advisory.engineer.company/portfolio/built-a-layered-automated-test-suite-across-four-layers-94/) - [Built the repository's guard engine — 268 registered commit checks, 277 lint rules and 15 custom ESLint rules — plus 146 tests of the guards themselves, so the build holds the standard, not review.](https://advisory.engineer.company/portfolio/built-the-repository-s-guard-engine-of-268-checks-95/) - [Established a continuous security programme — code scanning, DAST, dependency and vulnerability checks, SBOM generation, secret scanning and SHA‑pinned actions — alongside 21 written security audits.](https://advisory.engineer.company/portfolio/established-a-continuous-security-programme-104/) - [Built a commit gate of 22 one‑line linters plus five that earn a paragraph, with no warning tier and no inline suppressions permitted, covering HTML, CSS, JavaScript, Python, YAML, Markdown, shell, links, spelling, secrets and typography.](https://advisory.engineer.company/portfolio/built-a-22-linter-commit-gate-127/) - [Cut the site's browser‑driven quality gate from 1,636 seconds to 615 by scheduling its checks longest‑first through a worker pool bounded to four lanes, after measuring that alphabetical order cost 320 seconds against 224.](https://advisory.engineer.company/portfolio/cut-the-visual-quality-gate-to-ten-minutes-128/) - [Brought 10,242 lines of quality‑gate JavaScript under a formatter and a linter after establishing it was the largest body of code in the repository and the only one nothing read, fixing 13 findings and suppressing none.](https://advisory.engineer.company/portfolio/brought-the-quality-gate-code-under-a-linter-143/) - [Held the generator to 981 test cases at a 92% branch‑coverage floor with warnings treated as failures, and asserted idempotence by running the whole build pipeline twice from an empty file and requiring the second pass to change nothing.](https://advisory.engineer.company/portfolio/held-the-generator-to-964-tests-and-a-coverage-floor-145/) - [Selected every rule the Python linter has as an error, working through 1,815 findings to reach zero, with each of the few exemptions carrying a written reason and two of them backed by a checker instead of a comment.](https://advisory.engineer.company/portfolio/enabled-every-python-linter-rule-as-an-error-147/) - [Found the commit hooks and the quality gate running different checks while a document promised they were the same, by comparing the two lists in a test — the five that only ever ran by hand were the ones reading the CV prose.](https://advisory.engineer.company/portfolio/found-the-commit-hooks-and-the-gate-disagreeing-150/) - [Took the test suite from six tests over a sixty‑second limit to 135 passing in 8.9 seconds by profiling the main thread and removing the two calls it sat inside for 3,989 samples out of 4,017.](https://advisory.engineer.company/portfolio/took-the-test-suite-under-nine-seconds-158/) - [Held four repositories to one history standard — conventional, emoji‑free, no attribution trailers, enforced by a commit‑message hook — alongside 46 instruction documents that govern how the work is done.](https://advisory.engineer.company/portfolio/held-five-repositories-to-one-history-standard-165/)