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I build production-grade software: systems with test suites, CI/CD pipelines, security audits, and deployment documentation. Autonomous aerial systems with DAL-A safety discipline. Three-tier architecture combining formal verification, numerical methods, and real-time control.

The interface IS the model. Operator interfaces compress 6 data signals into the space marketing sites use for one headline.

Three areas I go deep on:

• Security-conscious system design — auth flows, RBAC, session management, secrets hygiene, OWASP Top 10
• Production infrastructure — Docker, Nginx, GitHub Actions, Prometheus/Grafana, Kubernetes
• Applied mathematics & quantitative methods — SO(3) Lie groups, ARIMA/SARIMA, Prophet, Monte Carlo simulation, stochastic modeling, Kolmogorov complexity, formal invariants

Available globally via BRT Inc. and Upwork.

flowchart TB
  subgraph T3["Advisory · cloud or local"]
    AI["AI router<br/>Claude · Ollama mistral:7b<br/>$5/day cap · circuit breaker"]
  end
  subgraph T2["Executive · 10–50 Hz · DAL-A"]
    GOV["Safety governor<br/>No eval/exec/getattr<br/>NO_GO on exception"]
    SHIELD["Formal shield · 5 invariants + 5 fog invariants"]
    DMS["Deadman switch<br/>NTP-attack detection"]
  end
  subgraph T1["Reactive · 1 kHz · on Pixhawk"]
    PX4["PX4 · NuttX RTOS<br/>Attitude quaternions · motor mix"]
  end

  AI -->|"suggestion (advisory)"| GOV
  GOV --> SHIELD
  SHIELD --> GOV
  GOV --> DMS
  GOV -->|"approved setpoint"| PX4
  PX4 -.->|"telemetry + attitude_quat"| GOV

  classDef advisory fill:#1a0d2e,stroke:#8b5cf6,color:#e2e8f0
  classDef executive fill:#0a1e2e,stroke:#06b6d4,color:#e2e8f0
  classDef reactive fill:#1c0a13,stroke:#ff006e,color:#e2e8f0
  class T3,AI advisory
  class T2,GOV,SHIELD,DMS executive
  class T1,PX4 reactive

Key principle: The AI never writes to the flight command path. The executive owns final authority. The reactive layer owns hard real-time. This separation is why an LLM can be useful in flight-adjacent systems without being a liability.

• brt-inc — SpaceX-style cinematic overhaul — Pure #000 background, SpaceX white-opacity variable series (--white-10 → --white-100), condensed display font. Hero: full-viewport mission statement ("Sovereign Technology / for Southern Africa." gradient), DAL-A/Ed25519/SADC-focused trust signals. New SADC Sovereign Marketplace section: 6 category cards (Defence, Agricultural, Infrastructure, Civic, Autonomous, Healthcare), 4 featured supplier cards with verified badges + ratings, RFQ CTA. Services renamed "Mission Capabilities" — pure surface-1 cards, indigo hover glow. Committed + pushed. Live at brtinc.vercel.app.
• Layered extension — A-L feature set committed (offline-first, governance receipts, sandboxing, E2E relay, interview AI, OSINT panel, form-filler, identity vault, dark-mode injection, tabs module). 104 tests passing. Pushed to GitHub.
• agentic-uav-stack — SRL-3 HIL gate — 14 HIL tests passing, 15 correctly skipping (live SITL container). Compliance gate: PASS 30 / FAIL 0. All DAL-A invariants clean. SRL-3 cleared.
• agentic-uav-stack — SO(3) Lie group geometry — lie_so3.py: Rodrigues formula, quaternion exponential (quat_from_omega), SLERP, N-dimensional rotation, singularity-free attitude_quat replaces Euler angles in FusedState. 40 mathematical tests.
• MahlanyaRPG — Ship phase complete. 5-tier hardware auto-detection, Steam OSS (12 achievements), USiSwatiLocalizationSubsystem (70 bilingual strings). 316 pipeline tests. Pre-launch.
• agentic-uav-stack — SRL-3 HIL gate — 14 HIL tests passing, 15 correctly skipping (live SITL container). Compliance gate: PASS 30 / FAIL 0. All DAL-A invariants clean. SRL-3 cleared.
• agentic-uav-stack — Fog water harvesting — Four mission profiles: boustrophedon survey, hover-collect, net-deploy, swarm (Raft-elected leader). SHT31/visibility/load-cell drivers. Kunkel LWC + Magnus dew-point. Five new DAL-A invariants (wind/mass/gap/tension/battery gates), all math.isfinite() guarded. 116 new tests. 942 total.
• agentic-uav-stack — SO(3) Lie group geometry — lie_so3.py: Rodrigues formula, quaternion exponential (quat_from_omega), SLERP, N-dimensional rotation (nd_rotation_compose), singularity-free attitude_quat replaces Euler angles in FusedState. 40 mathematical tests.
• MahlanyaRPG — Ship phase complete. 5-tier hardware auto-detection, UPerformanceAutoTuner, UProximityLODSubsystem, Steam OSS (12 achievements), USiSwatiLocalizationSubsystem (70 bilingual strings), Python simulation harness (6 tests). 316 pipeline tests. Pre-launch.

Swazi historical 3D RPG · UE5 C++ · Zig SIMD · Python · Pre-Launch

10 simulation plugins. 10 phases complete + full cross-platform performance system. 316 pipeline tests, 0 regressions.

Earth-science accuracy as a design constraint: 10m Copernicus DEM (Eswatini bounding box, UTM Zone 36S) eroded through 5,000 geomorphological passes — thermal, fluvial, aeolian, mass-wasting — via Zig SIMD @Vector(8, f32) kernels compiled to libmahlanya_compute.so. D-infinity flow accumulation (Tarboton 1997) extracts 6 river systems. Centroidal Voronoi Tessellation with Swazi social constraint tensors places settlements whose geometry communicates hierarchy without UI text.

UE5 C++ · Zig 0.13+ · Python 3.11 · GDAL · Unreal Insights · Steam SDK 1.58 · ASTC

Military command & control platform · 27,900 lines · PHP 8 + MySQL · production-ready

Real-time drone fleet management and threat detection system. RBAC with 4 roles, TOTP 2FA, blockchain-chained tamper-evident audit log, Node.js WebSocket telemetry shim, NATS JetStream integration.

Security audit: 3 Critical + 6 High findings → all 9 resolved · 22 files patched · 317 lines fixed · 0 regressions · audit-gated CI.

PHP 8.3 · MySQL 8 · Node.js · NATS JetStream · WebSocket · PHPUnit · GitHub Actions

Multi-scale autonomous drone platform · Three-tier architecture · Formal verification · 942 tests

SRL-3 HIL gate PASSED — 942 unit tests · 14 HIL tests passing. Kardashev 0.68.

Subsystems shipped: Brain daemon with key isolation · Simplex formal shield (10 invariants) · Deadman's switch with NTP-attack detection · Octogent multi-agent vulnerability scanner · N-version security divtab · Runtime PEP-578 audit hook · Merkle tamper-evident audit trail · Fog water harvesting (4 mission profiles: survey, hover-collect, net-deploy, swarm) · SHT31/visibility/load-cell sensor drivers · Kunkel LWC + Magnus dew-point fog physics · SO(3) Lie group geometry (shared/geometry/lie_so3.py): Rodrigues formula, quaternion exponential, SLERP, N-dimensional rotation, singularity-free attitude_quat in FusedState · Swarm Raft consensus · RF channel mesh · UAVZ/UAVZMA lossless codecs

Python 3.12 · NATS JetStream · MAVLink · ROS 2 Jazzy · DDS · numpy · pytest · GitHub Actions

Economic intelligence system · FastAPI + Plotly Dash · 54 tests passing · Quantitative Methods

Production-grade backend with 11 endpoint groups, SQLAlchemy ORM, JWT auth (3-tier RBAC). Forecasting engine: auto-order ARIMA/SARIMA time-series decomposition, Facebook Prophet with changepoint detection, Monte Carlo fiscal sustainability simulation (10,000 paths, 95% CI bounds). Impulse-response analysis for shock scenarios.

Python · FastAPI · Plotly Dash · Prophet · statsmodels · pandas · SQLAlchemy · PostgreSQL · Docker · Nginx · pytest

Production-grade booking platform · React 19 + TypeScript + Supabase + Vercel

Live business app deployed for Studio P, Manzini. OS-aware UI via userAgent/platform/maxTouchPoints (applied synchronously, zero layout flash). Two-round orchestrated parallel booking validation flow with conflict detection and real-time slot locking.

React 19 · TypeScript · Supabase · PostgreSQL RLS · PBKDF2 · Web Crypto API · Vercel

Binary disease classifier for SSA smallholder farmers · MobileNetV2 CNN · FastAPI + React PWA

MobileNetV2 fine-tuned on PlantVillage (healthy vs grey-leaf-spot). FastAPI inference endpoint, React PWA with offline support, blue-green Nginx deployment, Docker Compose stack. Targets low-spec smartphones common in SADC agricultural contexts.

Python · TensorFlow · FastAPI · React · Docker · Nginx · GitHub Actions

Levin's Universal Search over BrainFuck · Algorithmic Information Theory · Speed-optimised

Deterministic universal search achieving O(2^|p*| · t*) total work asymptotically — matching Levin's theoretical bound. Three optimizations: incremental execution (O(1) state restore), dead-set pruning (halted programs permanently removed), bracket precomputation (O(1) bracket target resolution).

Python · Algorithmic Information Theory · Kolmogorov complexity · prefix-free enumeration

Used car dealership platform · Next.js 16 + TypeScript + Supabase + Vercel · wheels-deals-eswatini.vercel.app

Procedural ASCII highway animation: 14-char luminance palette, dual Swazi mountain ridges (composite sine waves), Manzini city glow on right horizon, 3 oncoming headlight cars (delta-time position update), tail lights, wet road shimmer (per-cell Math.sin), roadside billboard, rain system (80 drops, random toggle). Mobile-adaptive: 20 FPS / fontSize 14px / 960px cap on mobile vs 30 FPS / 10px / 1920px on desktop; portrait-adaptive horizon; orientationchange listener; OffscreenCanvas video-frame sampling path with try/catch for older iOS. Thandi AI chat assistant (Haiku 4.5, live Supabase inventory context, finance calculation). Admin vehicle posting (password gate with timingSafeEqual, full form → Supabase insert). Media pipeline: magic-byte header validation, Supabase Storage, sharp WebP (150/400/800px), EXIF DateTimeOriginal FIFO sort, media_jobs queue. Anonymous analytics: crypto.randomUUID session IDs, user_events table, scored PersonalizedFeed (+3 body_type, +2 fuel_type, +4 price_range, +3 make). 4-step UX survey (framer-motion slide-up) + adaptive engine writing site_config (featured_body_types, layout_mode, cta_prominence).

Next.js 16 · TypeScript · Supabase · sharp · framer-motion · Tailwind CSS · Vercel · Anthropic

Operator website + internal toolkit · brtinc.dev · Next.js 16 App Router + Supabase + Vercel

Auth-gated internal tools: CRM (kanban + table view), proposal generator, service agreement templates, client onboarding intake, Stripe webhook handler, Resend email delivery.

2026-07-26 SpaceX-style cinematic overhaul: Pure #000 black, white-opacity variable system, condensed display font. Mission hero: "Sovereign Technology / for Southern Africa." gradient headline. New SADC Sovereign Marketplace section: 6 defence/agri/infrastructure/civic/autonomous/healthcare category cards + supplier verification strip + RFQ CTA. Services → "Mission Capabilities" capability grid. Auth-gated internal toolkit: CRM (kanban + table), proposal generator, service agreements, Stripe checkout, Resend email.

Next.js 16 · TypeScript · Supabase · framer-motion · Tailwind CSS · Vercel · Resend · Stripe

1. No AI in the flight command path. AI is advisory; formal shield + governor have final say. Engagement recs require human authorization.
2. DAL-A invariants are CI-gated. scripts/check_dal_a_rules.py rejects eval, exec, getattr, __import__ in safety-critical files.
3. Fail-safe means NO_GO. Governor returns NO_GO on exception; NaN sensor readings → NO_GO via math.isfinite() guards.
4. API keys never leave the daemon process. brain/daemon.py loads .env, pops secrets, then subprocess.Popen(..., env={}). Audit via make audit-keys.
5. Defense in depth at every layer. SROS2 enclaves enforce topic-level pub/sub authorization at DDS layer.
6. Multi-persona security review. 9 concurrent personas (red-team, blue-team, supply-chain, compliance, insider-threat, architecture-integrity, trojan-horse, goldilocks, cat-burglar) run weekly with independent findings consolidated by an LLM synthesis pass.

I write so the next operator can pick this up cold. National Libraries, government officials, defence forces are the design audience for the compliance posture. Repos and docs reflect that — read agentic-uav-stack/CLAUDE.md or sentinel/SECURITY.md for the standard.

Not a content marketer. Not a vibe-coder. Not a wrapper around someone else's API. Work targets compliance gates before features, not after; tamper-evident audit before "observability"; deterministic behaviour at system boundaries before probabilistic behaviour in the interior.

Building something that needs a solid engineer?

BRT Inc. · hello@brtinc.dev · Upwork

"Every project ships with a test suite, CI/CD pipeline, and deployment documentation — not just working code."

Through the issue tracker on any repo above. No DMs on other platforms.