cydefend.pro — Fullstack Development & Cybersecurity

About me

An engineer accountable for results

8+ years in fullstack development and cybersecurity. I write in Golang, Python, Rust and Flutter, design cloud infrastructure and own the product from architecture to production.

I work directly with clients: we lock goals and metrics before kickoff, with transparent reporting at every stage and support after launch. I speak the language of business outcomes, not acronyms.

01Reliability

I design with a safety margin: redundancy, backups, recovery plans and monitoring so the system survives peak loads.

02Security

Protection is built in from the first commit: code review, static analysis, infrastructure hardening — not patched after release.

03Transparency

Clear reports, honest estimates and documentation at every stage. You always know what's done, what's next and what it costs.

Practice

What I do

Three practice areas that cover a product end to end: from the first line of code to production infrastructure and protection.

Development

Web applications, REST/GraphQL APIs and Flutter mobile apps. From prototype and MVP to high-load production and long-term support.

HTML/CSS/JSPythonGolangRustFlutter/Dart

DevOps & Cloud

I design and run infrastructure: CI/CD pipelines, containerization, Kubernetes, multi-cloud (AWS/GCP), monitoring and alerting.

CI/CDKubernetesTerraformAWS · GCPPrometheus

Cybersecurity

Code and infrastructure audits, server hardening, threat modelling, Secure SDLC adoption. I find vulnerabilities before attackers do.

Secure SDLCAuditHardeningPentest

Stack

The technologies I work with

HTML/CSS/JSSemantic markup, responsive design, accessibility (a11y), frontend performance

PythonFastAPI/Django, task automation, ETL pipelines, data work

GolangHigh-load microservices, CLI tools, gRPC, async processing

RustSystem-level components where performance and memory safety are critical

Flutter/DartCross-platform mobile apps: iOS, Android, Web from a single codebase

DevOpsGitLab CI/GitHub Actions, Kubernetes, Terraform, Docker, Prometheus/Grafana

CybersecurityOWASP Top 10, static analysis (SAST/DAST), hardening, threat modelling

LinuxServer administration, hardening, automation via Bash/Ansible

Case studies

Results in numbers

Examples of how engineering decisions turn into measurable business impact.

Cloud

Cloud migration for a retailer

Moved 120 microservices to AWS with zero business downtime: autoscaling for seasonal peaks, redundancy, monitoring. Cut infrastructure spend while traffic grew.

−37%infrastructure spend reduced

Development

Flutter mobile app

Designed and shipped a cross-platform e-commerce app: one codebase for iOS and Android, CI/CD, A/B testing, releases every two weeks.

×2faster time to both app stores

Security

Platform audit & hardening

Full code and infrastructure audit of a fintech platform: closed 14 critical vulnerabilities, built Secure SDLC, trained the team. Zero critical incidents since.

0critical incidents after the audit

Contact

Let's discuss your project?

Tell me about your task — I'll suggest a solution, timeline and estimate. I reply within 24 hours.