Norberto Joso

Senior Software Engineer

Really Really Good • Part time

Jan 2026 - Apr 2026 • 3 mos

• Implemented RBAC-aware navigation and route guards across 14 admin routes and 4 permission tiers; cut “wrong screen / forbidden” support tickets on the new modules from 9 in the first 14 days of rollout to 2 over the following 45 days • Refactored the slowest data tables: capped page size at 25 rows, 300ms debounced search, skeleton states, and collapsed the first-paint data fetch chain from 8 sequential calls to 3 batched calls; p75 time-to-interactive on those views improved from ~1.9s to ~1.1s in Chrome Lighthouse runs on staging hardware • Partnered with US-based product and design on 22 scoped tickets with written acceptance criteria; 20 of 22 (91%) passed QA on first submission in the final 8-week window of the engagement • Added 38 Vitest + React Testing Library cases on the code paths touched, raised line coverage on those files from 54% to 81%, and removed 3 flaky tests that had been blocking ~40% of frontend merges on the main branch • Produced an 8-page handoff (local setup, 5 environment variables, smoke checklist, rollback notes) so the core team could own the shipped modules without a same-week knowledge gap

Senior Software Engineer

Southern Cross Austereo • Full time

Jan 2022 - Jan 2026 • 4 yrs

• Introduced a shared UI kit and dashboard layout patterns that cut duplicate frontend code by roughly 35% across three product teams and shortened new screen delivery by about one sprint on average • Owned REST and GraphQL APIs behind booking and reporting workflows; reduced average read latency on hot list endpoints by ~22% via selective fields, pagination caps, and PostgreSQL index tuning • Improved Core Web Vitals on the main customer app: ~25% better LCP and ~18% lower CLS after code-splitting, image policy changes, and fewer waterfall API calls on first paint • Hardened auth (JWT refresh rotation, RBAC checks on sensitive routes) and tightened validation so production auth-related incidents dropped from a handful per quarter to zero over the last 12 months • Worked async across product, design, and QA in Australian business hours with clear written RFCs, design handoffs, and weekly release notes for stakeholders • Mentored four engineers (junior to mid) through pairing, async reviews, and runbooks; two were promoted to mid-level within ~14 months • Ran on-call rotation and postmortems for production issues; mean time to restore for Sev-1/2 incidents the team owned improved by ~40% after adding dashboards, alerts, and repeatable rollback steps

Full Stack developer

LinkedIn • Full time

Jun 2018 - Dec 2021 • 3 yrs 6 mos

• Delivered end-to-end features (React/Next.js UI, Node services, PostgreSQL) for admin dashboards, notifications, and reporting used by ~200–350 internal users depending on the account • Built a shared table/filter component set that removed ~30% of one-off list screens and made bug fixes in one place instead of six divergent copies • Implemented auth, email/SMS hooks, and scheduled jobs for nightly exports; cut failed export runs from ~8% to under 2% by adding retries, idempotency keys, and clearer error surfaces • Added indexes and query refactors on the busiest reporting paths, improving typical report generation from ~45s to ~12s for the top five queries • Refactored duplicated validation into shared server modules and trimmed inconsistent API responses, which reduced regression bugs in those areas by roughly half over two quarters (tracked in Jira) • Partnered with QA on reproduction steps, edge-case fixtures, and release checklists; kept average defect reopen rate under 10% for features the team owned • Joined remote planning, sizing, and design reviews; documented deployment order and config flags so handoffs to ops rarely needed same-day hotfixes • Supported production through logs/metrics, on-call windows, and small hardening passes (timeouts, circuit breakers on flaky third-party calls)