ines.lx2 hours ago
31841
ines.lx Same blazer, two moods. Office or weekend?
Now leading engineering at Portal
Portugal · local
I build data‑heavy products end to end.From the ingestion pipeline to the last pixel, with security designed in from the start.
Full-stack engineer with a backend bias and an M.S. in Cybersecurity Analytics. I lead engineering on Portal, a fashion social app on the App Store. Before that I founded Density-Delta, a forensic real estate SaaS for Dubai built on 1.6M+ transaction records, and on the side I'm building GAAP Sentinel, which flags accounting manipulation across SEC filings. Born in South Africa, raised in Dubai, educated in California, now based in Portugal.
1.6M+Transaction records served by Density-Delta
100+Paying investor clients, Density-Delta
v2.0Portal shipped to the App Store
3.95GPA, M.S. Cybersecurity Analytics
Own it end to end
Pipeline to pixels, billing to auth. Almost everything on this page I built as the only engineer.
Data · API · app · billingIdempotent by default
Payments, webhooks and order flows survive retries and partial failures, so a replayed event never charges or ships twice.
Stripe · RevenueCat · PrintifyPrivate by construction
Collect less and round the rest. Portal's Market stores a town and a distance bucket, never anyone's coordinates.
Parameterised SQL onlyShip small, roll back fast
Migrations before deploys, tagged releases, and over-the-air updates that check runtime compatibility before going out.
Gated OTA pipelineCurrent roleLive on the App Store
Portal Fits4U
Lead Software Engineer · Portal F4U, Madrid · Remote · 2026 – present
A fashion social app for iOS. Scan your wardrobe, get styled by an AI stylist that knows what you own, post fit checks, and sell or trade the pieces you no longer wear. I own engineering end to end: product calls, architecture, the iOS app, the API and every release.
- AI stylist
A chat stylist grounded in the user's own closet, with looks rendered on a generated avatar. Built on Gemini with a fallback chain across image providers.
- Wardrobe scan
Finds every garment in one photo and renders each as a clean product shot. Segmentation-based background removal makes a pure white background a guarantee, with an automatic re-render gate behind it.
- Market
Sell or trade pieces from your closet without Portal ever touching money. Location privacy by design: a town and a distance bucket, never coordinates. Age-gated, one conversation per listing.
- Platform
Moved the app, API and storage onto a company-owned stack and shipped v2.0 as an update to the existing App Store listing, carrying every user's closet and posts across. Over-the-air releases go through a gated pipeline that checks runtime compatibility before anything ships.
- Portal Pro
Subscriptions on RevenueCat with App Store billing, plus Pro-only animated backgrounds written as Skia shaders, including a live weather sky.
ExpoReact NativeNode.jsExpressSupabase PostgresCloudflare R2GeminiRevenueCatSkiaEAS UpdateRailway
For you
maya.r5 hours ago
967
maya.r Trying the same trousers with a warmer palette.
Saturday · 21° and clear
Good evening
Pick a starting point or just ask.
Style my linen trousersThree looks from your closet
Date night, but make it easyPolished without trying too hard
What goes with my new trainers?Pairings for this week
Pack for a Lisbon weekendSix pieces, five outfits
Rework last week's outfitSame pieces, new feel
Dress for 18° and clearLight layers for today
Something for tonightUse my new jacketWarmer
Ask anything
Market
Near youSellTradeOuterwear
Sell1 km
Wool overcoatCOS · Size M · Worn twice
€40Trade4 km
Silk slip dressNo brand · Size S
SwapSell9 km
White leather trainersVeja · EU 42
€25Closet
42 piecesAll42Tops18Bottoms9Shoes6
Ready to rehome
3 pieces you haven't worn since spring.
List
Trench coatOuterwear
Linen shirtTops
Wide trousersBottoms
Slip dressDresses
LoafersShoes
Woven toteBags
Screens redrawn in Portal's palette for this page. Tap a feature or a tab to look around.
Experience
Where I've shipped
Founder roles and contract work, mostly as the only engineer, always owning the system end to end.
Portal F4U
Lead Software Engineer, contractLead engineer on Portal Fits4U, a fashion social app for iOS. I took the app from a TestFlight beta to v2.0 on the App Store and run engineering on my own.
- Rebuilt the platform on a company-owned stack (Expo app, Node and Express API, Supabase Postgres, Cloudflare R2) and shipped v2.0 as an update to the live App Store listing, migrating every existing user's closet and posts.
- Built the AI stylist, wardrobe scanning with segmentation-based background removal, the social feed, moodboard and direct messages with push notifications.
- Designed and shipped the Market: peer-to-peer selling and trading with off-platform payments, distance-bucketed location privacy and age gating.
+
- Portal Pro subscriptions on RevenueCat, with Pro-only Skia shader backgrounds and a live weather sky.
- Over-the-air release pipeline on EAS Update with a runtime assertion gate, so JavaScript updates only reach builds that can run them, plus tagged rollbacks.
- Image generation behind an environment-gated provider layer with automatic fallback between providers.
- Parameterised SQL everywhere, manual migrations ahead of every API deploy, and read-only security audits before each release.
Density-Delta ↗
Founder & Full-Stack EngineerA tiered SaaS delivering forensic real estate intelligence for the Dubai property market. Designed and shipped alone: architecture, data pipeline, billing, auth and UI.
- Serverless on Cloudflare Workers and D1, serving 16 years of Dubai Land Department transactions (1.6M+ records) across 204 communities and 2,000+ projects with sub-second responses from the edge.
- Custom ETL across six formats (CSV, PDF, XLSX, XML, KML, JSON), with heuristic matching that reconstructs links between communities, developers and projects into a strict relational schema.
- Earlier phase served 100+ real estate investor clients and 10,000+ monthly users through custom analytics and data licensing. The source data has since gone private, leaving Density-Delta with exclusive access.
+
- Free, Basic and Premium tiers on Stripe Checkout, Webhooks and the Billing Portal, with trials, prorated upgrades and idempotent webhook handling.
- Auth.js with Google OAuth and JWT sessions running on Workers.
- 3D map dashboard in deck.gl and Mapbox covering 13 metrics, quantile colour scales, a three-community compare mode and a forensic project view with every transaction in sortable tables and multi-axis charts.
GoodBuys ↗
Lead Engineer, Santa Clara University research teamI lead a six-person research engineering team under a faculty advisor, building the first centralised global registry of ecolabels and certified companies to expose greenwashing. The research has been accepted for publication, with a conference presentation in May 2026.
- Catalogues 100+ ecolabels and 10,000+ certified companies, separating claims backed by accredited third-party certification from self-declared marketing.
- Company recognition engine with weighted confidence scoring and dictionary-backed filtering, so names like "General" or "Pioneer" aren't mistaken for ordinary words.
- Adaptive network layer with per-host jitter and exponential backoff to work around anti-bot defences across dozens of certification body sites.
Beach & Bar Wear ↗
Founder & Full-Stack EngineerA direct-to-consumer apparel brand on a custom Next.js storefront. I owned engineering, infrastructure, brand, product design and marketing, and the launch reached hundreds of customers in its first months.
- Automated fulfilment: a successful Stripe payment builds the Printify production order from the database's product mapping, records it and emails the customer their tracking.
- Inventory state machine (Draft, Published, Out of Stock) behind a REST API, with idempotent payments and webhook reconciliation so orders and stock stay consistent through retries and partial failures.
- Background worker syncs stock with Printify every 15 minutes and moves products out of stock automatically.
+
- Storefront and admin dashboard in Next.js, React and custom CSS, with order history, contact details and shipment tracking kept server-side.
- Full brand identity: typography, colour system, photography direction and visual themes.
- Paid acquisition through Facebook Ads and Google Ads alongside organic social.
Selected work
Live products and side builds
Everything here is running. Open any card to visit it.
Founder · SaaS
Density-Delta
1.6M+ records · 204 communities · 16 yearsForensic real estate intelligence for Dubai. A 3D map dashboard, project deep-dives that surface every transaction, and a three-community compare mode, all served from the edge.
Side project · Forensics
GAAP Sentinel
900K+ public companies trackedIngests SEC EDGAR filings and follows US-GAAP taxonomy tags across reporting periods. When a company reclassifies the same metric, say an operating expense turning into capex, it gets flagged as a possible manipulation signal.
Side project · EdTech
GRE Vocab Tester
8,000+ monthly users · 5,000+ returningAdaptive vocabulary trainer. A scraping pipeline deduplicates 500+ high-probability words into spaced-repetition word packs, with flashcard, multiple choice and typo-tolerant free-type modes.
Research · Registry
GoodBuys
100+ ecolabels · 10,000+ companiesA live registry of ecolabels and certified companies that shows which sustainability claims hold up and which are marketing.
Founder · E-commerce
Beach & Bar Wear
Stripe → Printify, fully automatedFounder-built storefront with an inventory state machine, an automated order pipeline and a 15-minute stock-sync worker. Engineered, designed and marketed end to end.
Security & research
The security side
Selected work from my M.S. in Cybersecurity Analytics at Champlain College, plus published research.
Measuring security strategy against NIST CSF 2.0
Benchmarks how well cybersecurity strategies hold up in practice, using the VERIS Community Database and IBM Cost of a Data Breach data, mapped onto the framework's six functions and visualised in Tableau.
GVGovernIDIdentifyPRProtectDEDetectRSRespondRCRecover
Zero-knowledge password manager
An open-source design where every encrypt and decrypt happens on the user's device. The server only ever stores opaque vault blobs, so it can't read a secret even if it is compromised.
deviceencrypts→opaque blob→server stores·keys never leave
Intel Management Engine mitigation
A technical guide to three ways of containing the Intel ME: disable it outright, overwrite its firmware, or isolate it with custom network modules that block all outbound ME traffic at the device level while the chip stays active.
disable/overwrite/isolate· outbound ME traffic blocked
Detecting greenwashing at registry scale
The GoodBuys work on registry methodology, certification authority verification and spotting duplicate or misleading labels, accepted for publication with a conference presentation in May 2026.
100+ecolabels·10,000+certified companies
Skills
Tools I reach for
Languages
- JavaScript
- TypeScript
- SQL
- Python
- C++
Backend & data
- Node.js
- Express
- PostgreSQL
- Supabase
- SQLite / D1
- Drizzle ORM
- ETL pipelines
- REST APIs
- Webhooks
Frontend & mobile
- React
- Next.js
- React Native
- Expo
- Tailwind CSS
- deck.gl
- Mapbox
- Skia
Cloud & infrastructure
- Cloudflare Workers
- Cloudflare R2
- Docker
- AWS
- Railway
- EAS Update
- Git
Payments & AI
- Stripe
- RevenueCat
- Gemini
- LLM pipelines
- Image generation
Security
- NIST CSF 2.0
- Applied cryptography
- OAuth & JWT
- Hardware security
- Security analytics
- Tableau
Education
Education
Champlain College · M.S. Cybersecurity Analytics
3.95 GPA. Capstone benchmarking security strategy against NIST CSF 2.0; research on hardware security and zero-knowledge architecture.
Santa Clara University · B.S. Computer Science & Mathematics
Emphasis in software engineering. Four years of college rugby, and the start of GoodBuys.
JESS Dubai · International Baccalaureate
IB Diploma, and the first software projects.
Diplomas
Signed digital originals via ParchmentBeyond work
Off the clock
Sport, music, photography, and following how the world actually works.
Volunteering
Vietnam · House constructionBuilt housing with the White Thai community. Lived on site with residents, coordinated daily tasks and delivered on schedule.
Nepal · School restorationTwo weeks of post-earthquake support in Pokhara, repairing a primary school and resupplying classrooms.
Dubai · Assistant golf coachVolunteered at the Butch Harmon School of Golf, helping run youth lessons with demos, drills and feedback.
Contact
Let's build something solid.
Portal is my main focus, and I have room for one more fully remote freelance or contract project alongside it. I'm happiest as the sole developer or part of a small team, on backend-heavy, data-heavy or security-sensitive work.
kallangfraser@gmail.com
Open in mail
English (native) · Spanish (conversational) · German (learning)