David Soares

Rust Developer / Flutter Developer

1 recommendation

Salary / Daily rate

1 person recommend

Freelance

Remote only

Skills

CybersecurityFlutterRustDartBackend DeveloperTech LeadMobile DeveloperFrontend DeveloperFullstack DeveloperSoftware Engineer

Languages

French (Native)English (Fluent)

Recommended by

Risvan Asif

Carden

CEO & Co-founder @Carden

Recommended on 20 february 2025

About me

Intro

Ex OSCP-certified cybersecurity consultant, I currently work as a freelance software engineer. I work primarily with Rust and Flutter. Portfolio: portfolio.valdum.dev Keywords: Rust (Axum, Tokio, Serde, SQLx, Leptos) Flutter (Riverpod, Dio, GoRouter, Json Annotation, Freezed)

Links

Work experience

Software Engineer (Rust / Flutter)

FreelanceFreelance

May 2022 - Present

4 years 6 months

Remote

I specialize in Rust for back-end development and Flutter for front-end development. I can have a 360° vision over a project because I can operate on both the frond-end and back-end if necessary. I also have in-depth cyber-security knowledge thanks to my past experiences.

Founder

MangaNotif

Jul 2025 - Present

1 year 4 months

Remote

Early stage solo-startup I work on in parallel with freelancing with the little spare time I have Back-end (Rust), Scraping Agent (Rust), Mobile App (Flutter)

Rust/Flutter Tech Lead

CardenFreelance

Dec 2024 - Sep 2026

1 year 10 months

Remote

• Refactored the notification infrastructure (Push & SMS) to make it more reliable • Improved user experience and fixed bugs in the Flutter B2B app • Synchronized the in-app calendar with Planity • Enhanced security of the Rust API • Designed a dynamic payment system using Stripe Connect, enabling B2B client to precisely customize their payment flow • Increased performance of the Postgres database

Flutter Lead Dev

Be Ys Trusted SolutionsFreelance

Oct 2022 - Mar 2024

1 year 6 months

Clermont-Ferrand, France

• Built an MVP in a couple months and maintained it with a very small team (2 devs) • Implemented a native Kotlin/Swift plugin in Flutter • Built another MVP in a couple months when management decided to rebrand • Taught Flutter to a small team of React Native devs and oversaw their work • Synchronized the front-end team with the project's architect and the back-end teams • Worked as part of an international team across multiple timezones

Cybersecurity Consultant

Cykrony

Apr 2021 - May 2022

1 year 2 months

Remote

• Carried out security audits on clients' infrastructure or applications (web, active directory, code, mobile) • Handled monthly phishing campaigns against employees of client companies • Built and administered the phishing and mailing servers • Built a SIEM using the ELK Stack (Elastic, Log Stash, Kibana) on Kubernetes. The goal was to offer a turnkey SIEM service to small businesses that didn’t have the necessary budget to set up the infrastructure

Intern Pentester

Conix

Jun 2020 - Aug 2020

3 months

Remote

Learnt the job of a pentester with a senior consultant. Discovered mobile applications audits

Project Work Student

Robert Gordon University

Apr 2018 - Jun 2018

3 months

Aberdeen, UK

Created a Web-based CTF used to teach cybersecurity to Robert Gordon University's students during their curriculum. The project won RGU's "Best Project Work" that year


Education

lSIMA, Clermont-Ferrand

Master of Engineering - MEng, Computer Science

2018 - 2021

2 years 8 months

Network & security specialization

University Institute of Technology, Clermont-Ferrand

Two-year university degree in technology, Computer Science

2016 - 2018

1 year 11 months

Albert-Londres school complex

High-School Diploma in sciences, Sciences

2012 - 2016

3 years 11 months


Licenses & certifications

Offensive Security Certified Professional (OSCP)

Issued: Dec 2021

Certified by Offensive Security

Hacking & Sécurité : Avancé

Issued: Sep 2019

Certified by Sysdream, IT Security Services

Hacking & Sécurité : Fondamentaux

Issued: Jul 2019

Certified by Sysdream, IT Security Services

Social Engineering & Contres-Mesures

Issued: Jun 2019

Certified by Sysdream, IT Security Services

MOOC SecNumAcadémie

Issued: Feb 2019

Certified by ANSSI - Agence nationale de la sécurité des systèmes d'information

Portfolio

Finance App

Fitness App

Android CTF

Spyware POC

The best place to find your next move

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