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Guillaume Strohecker's avatar
Guillaume Strohecker
London, UK
AI Agent Security Auditor | Fast, evidence-based reviews
New to Contra
AI Agent Security Auditor | Fast, evidence-based reviews
Cover image for I recently completed a security
I recently completed a security hardening pass on an AI-enabled mobile product. The most important issues weren’t exotic vulnerabilities. They were practical deployment risks: password reset race conditions missing abuse controls weak retention guarantees mobile backup exposure logging and CI gaps Each confirmed finding was fixed and backed by regression tests before the security baseline was marked PASS. One lesson stood out: security reviews are most useful when they produce evidence and actionable fixes, not just scanner output. I’m now offering focused 24-hour AI Agent Security Mini-Audits for founders and small teams. https://contra.com/s/2Z7YgYXU-ai-agent-security-mini-audit?r=guillaume_strohecker_6m06cchc
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Cover image for Mobile Security & Privacy Hardening Security
Mobile Security & Privacy Hardening Security hardening focused on mobile platform protections and privacy-preserving behavior. Android application backup was disabled to reduce risk around locally stored session material, and release builds were hardened to block cleartext traffic while keeping local development support isolated to debug/profile builds. The review also verified that BLE remains anonymous, one-sided interest stays private, precise coordinates are not exposed publicly, and Social Heat remains aggregate and threshold-gated.
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Cover image for API Rate Limiting & Abuse
API Rate Limiting & Abuse Protection Security hardening focused on API abuse resistance. Rate limits were added to registration, login, password-reset request and confirmation, Click Intent creation, and public Heat reads. The limiter was designed with bounded state, explicit email normalization, case-sensitive reset-token fingerprints, expiry sweeping, and fail-closed behavior under saturation. Regression tests verified throttling behavior and recovery.
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Cover image for Authentication & Password Reset Hardening Security
Authentication & Password Reset Hardening Security hardening focused on authentication and account recovery. The work included stronger scrypt password hashing, legacy-hash migration, login timing protections, atomic password-reset token consumption, and session revocation after reset. PostgreSQL concurrency and regression tests verified that a reset token can only be successfully consumed once and that authentication behavior remains safe under failure conditions.
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GitHub(5)
Neil Seymour's avatar
Neil Seymour
London, UK
Cloud Infrastructure Engineer · AWS · Kubernetes · Docker
New to Contra
Cloud Infrastructure Engineer · AWS · Kubernetes · Docker
Cover image for Preview Environment System · CI-Driven
Preview Environment System · CI-Driven · Full Stack Automated preview environment system triggered by CI pipelines. On every PR tagged for preview, a GitHub Actions pipeline builds and pushes a branch-tagged Docker image, which triggers a Northflank webhook to instantiate a full-stack environment from a template — server, worker, PostgreSQL, migrations, and a unique subdomain URL. Environments are completely isolated per PR with no shared state, spin up in minutes, and are automatically destroyed when the PR is closed or merged. Production releases follow the same pipeline on merge to master, using Helm atomic upgrades with zero-downtime rolling updates.
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Cover image for Multi-Arch Docker Pipeline — GitHub
Multi-Arch Docker Pipeline — GitHub Actions · GHCR CI/CD pipeline building multi-architecture Docker images (linux/amd64 + linux/arm64) via GitHub Actions and CircleCI. Uses Docker Buildx with QEMU emulation, multi-stage Dockerfiles for minimal production images, and automatic tagging by commit SHA, branch, and latest. Images are published to GitHub Container Registry (GHCR) with a multi-arch manifest. Deployments use Helm with atomic upgrades and automatic rollback, targeting both ephemeral preview environments and production EKS clusters.
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Cover image for Cloud Infrastructure — AWS, EKS
Cloud Infrastructure — AWS, EKS & CI/CD Pipeline Architecture diagram representing the infrastructure stack I design and manage for clients. Covers a full CI/CD pipeline (GitHub Actions → Docker multi-arch build → Helm deploy), an Amazon EKS cluster with production-hardened pods (HPA, PodDisruptionBudgets, NetworkPolicies), supporting AWS services (RDS, S3, IAM), and observability via Prometheus and OpenTelemetry.
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Cover image for Production Helm Chart — Kubernetes
Production Helm Chart — Kubernetes Deployment A production-grade Helm chart managing a multi-component application on Kubernetes. Includes separate server and worker deployments, HPA and PodDisruptionBudgets for resilience, NetworkPolicies for pod-level traffic control, a pre-deploy migration job, ingress with TLS, and a PostgreSQL dependency. Structured with separate values files for local dev and production environments.
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GitHub(2)
Jordan Daley's avatar
Jordan Daley
London, UK
UX Writer for tech products. Design system specialist.
4.8
Rating
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Followers
UX Writer for tech products. Design system specialist.
Cover image for Content design - full product redesign
Content design - full product redesign
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Cover image for Scaling customer support processes
Scaling customer support processes
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Cover image for UX Writing
UX Writing
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GitHub(2)
Nafisah Animashaun's avatar
Nafisah Animashaun
London, UK
Digital marketing specialist with expertise in AI automation
Digital marketing specialist with expertise in AI automation
Cover image for 🚀 MAKING POLICY WORK SMARTER WITH AI I’ve been diving deep ...
🚀 MAKING POLICY WORK SMARTER WITH AI I’ve been diving deep into how AI can actually make public affairs and policy research more efficient, from automating stakeholder mapping to real-time qualitative insights. My next focus? Building lightweight workflows that combine AI-assisted analysis + ethical guardrails, tools that save hours without losing rigour. I help teams move from manual reporting → automated insight pipelines that respect privacy, transparency, and policy goals. If your organisation wants to experiment with ethical automation, I’d love to collaborate.
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Cover image for 🚀 BUILDING RESPONSIBLE SYSTEMS WITH AI AI is reshaping how ...
🚀 BUILDING RESPONSIBLE SYSTEMS WITH AI AI is reshaping how decisions are made, but most organisations still struggle to turn responsible tech principles into everyday practice. I’ve been working at that intersection: helping teams design AI-assisted workflows that keep transparency, fairness, and privacy at their core, from live policy-research dashboards to automated qualitative analysis tools. This month, I’m exploring how lightweight automation can enable public affairs to work smarter, faster, and more ethically. If your organisation wants to integrate AI without losing human judgement, I’d love to collaborate.
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Cover image for Reinforcement Learning for Safer AI Agents: Meta Project
Reinforcement Learning for Safer AI Agents: Meta Project
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Cover image for Interview on Career Journey with Creative Lives in Progress
Interview on Career Journey with Creative Lives in Progress
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GitHub(1)
Carl Nash's avatar
Carl Nash
London, UK
iOS Engineer crafting beautiful and scalable iOS Apps.
iOS Engineer crafting beautiful and scalable iOS Apps.
Cover image for Mobile Security Framework development for UK Banking Group
Mobile Security Framework development for UK Banking Group
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Cover image for Development of Selfridges' First iOS Retail App
Development of Selfridges' First iOS Retail App
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Cover image for Virgin Money iOS App Enhancement
Virgin Money iOS App Enhancement
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GitHub(1)