Віктор

Viktor Marymorych
Software Engineer (Backend & Security Systems)

Summary
Software Engineer with over 6 years of hands-on experience
Personal Info focused on Backend, Systems, and Infrastructure.

Ukraine Expert-level pro ciency in Go (Gin), Python (FastAPI), and Java
(Spring Boot), specializing in complex, multi-service
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architectures.
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Hands-on Development:
Architected high-performance network components

Links and APIs in Go (5+ years).
Developed backends and APIs for AI services using
LinkedIn
Python (5+ years).
Website
Engineered reliable enterprise applications with Java
& Spring Boot (5+ years).

Skills Utilized Rust (3+ years) for secure, high-performance
network tooling.
Python & FastAPI
DevOps & Automation: Proven experience in 'infrastructure-
as-code' and CI/CD pipelines (TeamCity, Docker). Developed
Go (Golang) & Gin
a proprietary framework of 15+ utilities (Python/Go/Rust) for
Java & Spring Boot automating audit and monitoring.
Unique Advantage: A deep background in cybersecurity
Redis (R&D, C++, DevSecOps) allowing me to engineer systems that
are secure-by-design.
Docker & Kubernetes (K8s)

Databases (PostgreSQL, Work Experience
MySQL, ClickHouse)
Python Developer, EON PLUS
CI/CD (Jenkins, GitLab CI, May 2025 - October 2025

TeamCity) Developed and maintained a high-performance,
containerized microservice architecture using Python and
Cloud (GCP, DigitalOcean) FastAPI for an enterprise client.
Engineered the backend for an AI chat service,
IaC (Terraform, Ansible,
implementing an API-driven consultation chat powered by a
Pulumi)
vector database.
Developed the document- ow microservice, enabling secure
Git & GitHub Actions
digital document processing, signing, and static storage.
Vector Databases (OpenAI) Successfully integrated the document service with the "Diia"
national e-governance platform to handle digital signatures.
Rust
Built the noti cations service by integrating multiple third-
party APIs (Telegram bots, TurboSMS, SMTP2Go) for
C++
asynchronous alerts.
Unreal Engine 5 Developed and maintained the nance microservice API.
Managed and wrote OpenAPI (Swagger) documentation,
Angular & TypeScript including both auto-generated (FastAPI) and custom
(openapi.yaml with $ref) speci cations.
WebSocket API
Deployed and managed all microservices within a Docker
OpenAPI (Swagger) environment.

Senior Software Engineer (Security Automation), Multiple US-
Applied Security & DevSecOps
based Clients (under NDA)
January 2025 - October 2025
Engineering Leadership &
Architected, developed, and maintained a proprietary
Mentoring
automation framework of 15+ utilities using Go, Python, and
Strategic Thinking & System Rust.
Design The framework automates 99.9% of security audit, forensic
analysis, and defensive hardening tasks, replacing
Network Security & thousands of hours of manual work.
Cryptography Engineered the framework to conduct automated
infrastructure testing, microservice threat modeling, and
Penetration Testing & Red
live incident mitigation for six US-based organizations.
Teaming
Integrated Python-based AI modules to auto-generate

Assembler & Reverse vulnerability reports and actionable mitigation plans.
Engineering Acted as the nal point of escalation, deploying and
supervising the framework's response to active breaches.
Security Operations &
Full Stack Security Engineer, Stealth Startup (under NDA)
Incident Response December 2024 - June 2025

Architected and developed the complete backend for a real-
Malware Design & Evasion
time network monitoring platform.
Solana Smart Contract Built a multi-service Zero Trust backend using a polyglot
Security architecture:
Go (Gin) for high-performance WebSocket channels
Swift & Xcode and data ingestion.
Python (FastAPI) for AI-driven analytics modules.
Tokenomics
Java (Spring Boot) for high-reliability enterprise
services.
Languages Developed secure, containerized agents (Go/Rust) to run in
Docker, sending isolated telemetry (CPU, RAM, ports) over
English
hardened protocols.
Ukrainian Engineered encrypted data ows, multi-level user isolation,
and role-based access control (RBAC) from the backend to
Russian the frontend.
Enterprise Defense Architect, Bank Infrastructure (under NDA)
October 2024 - June 2025

Led the engineering e ort to secure a large-scale core
banking system with 100+ microservices and legacy
components.
Personally developed and deployed new secure
microservices (Go/Java) and hardened existing legacy code.
Built and managed CI/CD pipelines in TeamCity for
automated container security scanning (using custom Rust
scanners) and deployment.
Engineered technical solutions to meet PCI DSS, ISO 27001,
and NBU compliance requirements.
Re-architected and optimized SIEM pipelines for high-
performance logging and enhanced forensic traceability.

Blockchain Security Tools Developer (R&D), Web3 Security Group
(under NDA)
September 2024 - November 2024

Tasked with performing manual security audits for 24+
Solana-based projects, from smart contracts to backend
services.
Identi ed major ine ciencies in the manual audit process
and began R&D on an automation solution.
Initiated the development of a proprietary audit framework
(using Python, Go, and Rust) to automate vulnerability
discovery.
Developed and tested the rst versions of this framework,
which proved capable of nding reentrancy, privilege
escalation, and injection vulnerabilities.
This R&D project laid the foundation for a toolset that would
later automate over 90% of manual audit tasks.

Gameplay Engineer (AAA Horror Title), Stealth Studio (under NDA)
June 2024 - August 2024

Contributed to an o cial expansion for a globally known
AAA asymmetrical horror title.
Scripted in-game logic, quest events, and character
interactions using Unreal Engine 5 (C++ and Blueprints).
Participated in internal C++ code reviews and collaborated
with international teams under NDA.

Mobile App Developer (iOS), Stealth Startup (under NDA)
January 2024 - May 2024

Engineered the mobile data storage layer for a rapid-
delivery iOS application.
Focused on application architecture design and memory use
optimization.
 Integrated external UI and logic modules from teammates
into a cohesive application structure.
Collaborated directly with the product lead to ensure
module compliance and delivery ow.

Lead Backend Engineer (Infrastructure), Major Digital Bank (under
NDA)
March 2023 - September 2023

Led the backend development of a secure, large-scale digital
banking platform.
Personally architected, developed, and containerized
microservices (using Go/Java) for core banking functions,
fraud detection, and AML compliance.
Engineered and delivered a full infrastructure-as-code (IaC)
solution with automated audit trails and observability.
Built and integrated a multi-layered Zero Trust
infrastructure, managing 70+ integrated components (EDR,
SIEM, PAM, IAM, HSM, etc.).
Designed secure communication layers and integrated real-
time security orchestration (SOAR) and user behavior
analytics (UEBA).

Red Team Lead & O ensive Security Engineer, FortiNet
January 2023 - January 2024

Promoted from Junior Analyst to Team Lead in 3 months,
leading a 7-person engineering team.
Led the R&D and development of advanced, low-level
security analysis tools.
Designed and developed custom C++ socket payloads for
system stress-testing and advanced network protocol
simulation.
Wrote and maintained a core toolkit of Python-based
network probes for automated infrastructure analysis.
Performed low-level system analysis using assembly and
disassemblers to inform secure software design.

Full Stack Developer, PerfectLine
October 2021 - December 2022

Joined as a junior and quickly gained responsibility over core
backend and frontend modules.
Developed, and maintained modular backend systems using
Java (Spring Boot) and Python (FastAPI/Flask).
Built and containerized scalable applications using Docker,
managing secure deployment pipelines.
Developed responsive web interfaces with Angular and
TypeScript.
 Engineered secure Docker architectures and authored
internal documentation on secure coding practices.

Software Developer (Trainee / Junior), Stealth Company (under
strict NDA)
November 2019 - September 2021

Gained foundational commercial experience in backend
development, focusing on software engineering
fundamentals and learning core technologies.
Worked extensively with Python and Java in a professional
R&D environment.

Education
Software engineering, Odessa Polytechnic University
September 2021 - June 2025