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Viktor Marymorych
Senior Backend & Systems Engineer
Rust · Go · Python — distributed, real-time and AI agent systems

Profile

Backend and systems engineer with 6+ years building production services in Rust, Go and
CONTACT Python: distributed and event-driven backends, real-time streaming paths, and AI agent /
MCP integrations.
LOCATION
I design for the failure case first: timeouts, retries, idempotency and back-pressure belong in
Ukraine · Remote
the first version, not a later patch. A system is unfinished until its behaviour can be
PHONE
reconstructed from logs, metrics and events. An offensive-security background decides
[open contact info](look above in the "contact info" section)
where trust boundaries sit, how tenants are isolated, and how secrets and audit trails are
EMAIL handled.
[open contact info](look above in the "contact info" section)

Selected systems
LINKS
NutriSense Go · Flutter · LLM nutrisense.redsentra.tech
PORTFOLIO
Shipped mobile product. Go backend behind a Flutter client, with the assistant held inside a
viktor.redsentra.tech fixed contract — bounded inputs, schema-validated outputs, defined refusals. Owned by
GITHUB Red Sentra.
github.com/Viktor25104
RustSTT Rust · WebSocket · CUDA / Metal stt.redsentra.tech
LINKEDIN Streaming transcription over WebSocket, with partial results while the speaker is still talking.
viktor-marymorych Several recognition architectures behind one interface; one codebase targets CPU, CUDA or
UPWORK Metal. Owned by Red Sentra.
Viktor M.
Vestry Rust · gRPC · Protocol Buffers · MTProto vestry.redsentra.tech
TEAM Four Rust services split along failure domains, with schema-first Protocol Buffers contracts
redsentra.tech and all MTProto behaviour isolated behind a single boundary. Commissioned, built with and
for a partner.
CORE STACK Lexora Rust · event-driven · Cloud Run lexora.redsentra.tech
A state change and the events it produces commit together through a transactional outbox,
Languages
and idempotent workers do the slow work off the request path. Commissioned and co-
Rust · Go · Python · TypeScript · SQL
developed, supported in production.
Backend & distributed Aelyx Rust · MCP · Git aelyx.redsentra.tech
gRPC & Protocol Buffers · WebSocket A durable, Git-aware model of a codebase exposed to AI tools over MCP: state anchored to
· REST / OpenAPI · FastAPI · Gin · commits, incremental analysis instead of full reanalysis. Personally owned, used daily by the
event-driven architecture ·
team.
transactional outbox · background
workers · idempotency & back- Also: Cortex — network reconnaissance tooling, pre-release. Sentinel Solar — edge telemetry on a
pressure local backend beside the inverter. Web Aegis and Blockchain Aegis — internal proprietary tooling. All
repositories are private; case studies at viktor.redsentra.tech.
AI systems
LLM integration · guarded agent
behaviour · Model Context Protocol · Experience
tool calling · vector search ·
streaming speech-to-text Founder & Systems Engineer — Red Sentra December 2025 — Now · Remote
Eight-person remote engineering and product team. I stay technical: architecture, Rust
Data
and Go services, and the delivery work nobody else picks up.
PostgreSQL · Redis · ClickHouse ·
Own products in production alongside commissioned systems for partners, with long-
MySQL · schema & migration strategy
term support for everything the team ships.
Internal engineering and security tooling built and maintained in-house.
AVAILABILITY
Backend Engineer · Contract — Efficlose December 2025 — Now · Remote
Open to backend, systems and AI-
Backend engineering on a product where an AI assistant joins meetings and automates
agent engineering roles. Remote,
the administrative follow-up.
international.
Real-time capture path: Rust speech-to-text integration, WebSocket transport, Redis event
processing.
LLM and CRM integrations including MCP tooling; migrations, infrastructure, security and
production reliability.

Viktor Marymorych — Senior Backend & Systems Engineer viktor.redsentra.tech · Page 1 of 2

ENGINEERING DEPTH
Experience (continued)
Infrastructure
Python Developer — EON PLUS May 2025 — October 2025
Docker · Kubernetes · Terraform ·
Ansible · CI/CD (GitHub Actions, Containerised FastAPI microservices for an enterprise client, deployed and operated in
GitLab CI, TeamCity) · GCP / Cloud Docker.
Run · DigitalOcean · observability Backend for an AI consultation chat served from a vector database, and a document-flow
service for secure processing, signing and storage — integrated with the Diia national e-
Security engineering
governance platform for digital signatures.
secure-by-design architecture · trust
Finance and notification services over third-party APIs (Telegram, TurboSMS, SMTP2Go);
boundaries · tenant isolation · service
owned the OpenAPI specifications, both generated and hand-written.
authentication · Zero Trust & RBAC ·
secrets and encryption · auditability ·
Senior Software Engineer, Security Automation January 2025 — October 2025
threat modelling
— US clients (NDA)
Also worked in Architected and maintained a proprietary automation framework of 15+ utilities in Go,
Java & Spring Boot · C++ · Angular Python and Rust, replacing manual audit, forensic analysis and hardening work across six
organisations.
APPROACH Automated infrastructure testing, microservice threat modelling and live incident
mitigation; Python AI modules generated vulnerability reports and mitigation plans.
Design for the failure case first —
timeouts, retries, idempotency and Full Stack Security Engineer — Stealth startup (NDA) December 2024 — June 2025
back-pressure belong in version Built the multi-service backend for a real-time network monitoring platform on Zero Trust
one. principles: Go (Gin) for WebSocket channels and ingestion, Python (FastAPI) for analytics,
Security is an architecture decision, Java (Spring Boot) for enterprise services.
not a review at the end. Containerised Go and Rust agents shipping isolated host telemetry over hardened
If I cannot reconstruct what a protocols; encrypted data flows, tenant isolation and RBAC enforced end to end.
system did from its logs, metrics
and events, it is not operable. Enterprise Defense Architect October 2024 — June 2025

Keep models on a leash: explicit — Core banking platform (NDA)
tool boundaries, validated I/O, and Led the engineering effort to secure a core banking system of 100+ microservices: new Go
a path that works when the model and Java services, plus hardening of legacy components.
is wrong.
TeamCity pipelines running custom Rust container scanners, SIEM pipelines re-
Ship it, then support it. Owning the architected for forensic traceability, and the technical side of PCI DSS, ISO 27001 and NBU
on-call side changes the decisions requirements.
you make on day one.
Lead Backend Engineer, Infrastructure March 2023 — September 2023
LANGUAGES — Digital bank (NDA)
Architected and containerised Go and Java microservices for core banking, fraud
English Advanced detection and AML compliance.
Ukrainian Native Delivered infrastructure-as-code with automated audit trails and observability, and a Zero
Trust infrastructure integrating 70+ components (EDR, SIEM, PAM, IAM, HSM).
Russian Native
Red Team Lead & Offensive Security Engineer January 2023 — January 2024
— FortiNet
Promoted from analyst to lead a seven-person team within three months; ran R&D on
low-level analysis tooling in C++ and Python — network probes, protocol simulation, and
system analysis with disassemblers that fed back into secure design work.

Earlier experience

PerfectLine — Full Stack Developer October 2021 — December 2022
Java (Spring Boot) and Python backends, containerised deployment pipelines, and Angular /
TypeScript interfaces.
Short engagements and R&D 2019 — 2024
R&D on a Solana smart-contract audit framework (Python, Go, Rust); gameplay scripting on
an Unreal Engine 5 AAA expansion; an iOS storage layer; and a trainee-to-junior backend
role in Python and Java from 2019.

Education

BSc, Cybersecurity and System Engineering 2021 — 2025
Odesa Polytechnic National University

Viktor Marymorych — Senior Backend & Systems Engineer viktor.redsentra.tech · Page 2 of 2