Freelancers using Flutter in LondonFreelancers using Flutter in London
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Petar Santor's avatar
Petar Santor
London, UK
Transforming Ideas into Mobile Apps
Transforming Ideas into Mobile Apps
Cover image for LiteBit app
LiteBit app
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27
Cover image for NightShift app
NightShift app
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32
Cover image for Wio app
Wio app
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42
Cover image for Findout app
Findout app
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19
Flutter(5)
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 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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17
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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32
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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24
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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29
Flutter(1)
Umer Zia's avatar
Umer Zia
London, UK
Full-stack Web & Mobile Expert
Full-stack Web & Mobile Expert
Cover image for Home | Nexa Node
Home | Nexa Node
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13
Cover image for Vite Home - Vite Mauritius
Vite Home - Vite Mauritius
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11
Cover image for Accept App
Accept App
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11
Cover image for AI-Based SaaS Website competing ChatGPT
AI-Based SaaS Website competing ChatGPT
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34
Flutter(3)