Антон

Senior Full-Stack Engineer
Anton Nguyen
Ukraine, Kyiv | P: [open contact info](look above in the "contact info" section)| [open contact info](look above in the "contact info" section)

SUMMARY
Senior Full-Stack Engineer with 7+ years of experience designing and delivering full-stack solutions, mainly for SaaS
platforms across fintech, security, and infrastructure domains

SKILLS
Languages: TypeScript, JavaScript, PHP, C#, Python, SQL, Bash
Backend: Node.js, NestJS, Fastify, Express.js, Laravel, .NET
Frontend: React, MobX, Context API, Plasmo
Databases: PostgreSQL, MySQL, MongoDB, Elasticsearch, Redis
Infrastructure: Docker, Kubernetes, AWS (S3, EC2), Nginx, Caddy, GitHub Actions, GitLab CI
Monitoring/Testing: Sentry, DataDog, Metabase, Prometheus, Grafana, Jest, Testing Library, Artillery
Other: Keycloak, HashiCorp Vault, Stripe, Solana/web3.js, ethers.js, CI/CD pipelines, microservices architecture

WORK EXPERIENCE
ELITEX USA Remote
Secure Browser Platform | Full Stack Engineer Oct. 2024 – Present

Description: Security platform offers protection against online threats by combining secure access controls and real-
time threat detection.
Stack: TypeScript, C#, Fastify, Knex, .NET, PostgreSQL, Docker, Kubernetes, Caddy, GitHub Actions, Sentry,
DataDog, Metabase, Jest, Testing Library, Artillery
Responsibilities:
• Designed, developed, and maintained applications based on business requirements
• Took part in decisions regarding architecture and code organization
• Had end-to-end responsibility for features across various components
• Performed unit/integration/load testing
• Implemented and maintained CI/CD pipelines

Tetracode Ukraine Remote
Payroll System | Backend/Architect Mar. 2024. – Mar. 2026

Description: SaaS payroll platform supporting crypto and fiat payments, with server-side encryption with splittrust
architecture and KYB/AML compliance.
Stack: NestJS, Fastify, Drizzle, Bull MQ, ioredis, PostgreSQL, Docker, GitHub Actions, Caddy, HashiCorp Vault,
Keycloak, @solana/web3.js, Stripe, NowPayments
Responsibilities:
• Architected the full system: researched and implemented split-trust encryption; defined system components,
relationships, and data flows visualized via draw.io and Mermaid; calculated potential load and provided
hardware specifications; compared rental costs across AWS EC2, Azure VMs, and Hetzner instances
• Analyzed feature requirements and UI designs, created technical breakdowns, and provided estimates
collaborating with the frontend lead engineer
• Delivered MVP and completed 2 product iterations, enabling the platform to onboard its first 10 customers
• Owned end-to-end backend and infrastructure development, serving as the sole backend engineer reporting
directly to the product owner
• Configured and managed server infrastructure including environment provisioning, secrets management via
HashiCorp Vault, and SSL termination through Caddy
NDA EU Remote
Job Listings Aggregator | Full-Stack Engineer Aug. 2023 – Dec. 2024

Description: SaaS platform aggregating remote job listings from different public sources (RemoteOK, Remotive,
We Work Remotely, HN Who-is-hiring, and more), with subscription-based access, multi-wallet billing, referral
program, and customizable filter rules
Stack: TypeScript, React, Zustand, Ant Design, PHP, Laravel 10, PostgreSQL, Redis, Meilisearch, AWS (S3,
EC2), Nginx, GitHub Actions, Docker, Next.js, Chart.js
Responsibilities:
• Architected and developed most of the REST API endpoints across the platform, supporting multi-language
localization with locale-prefixed routing
• Engineered a modular multi-gateway payment system (Stripe, LemonSqueezy, Paddle) using Laravel Modules
pattern, with webhook handling and transaction tracking
• Built a multi-tier discount engine combining time-based promotions, volume discounts, plan-based pricing,
geo-restricted promo codes, and referral bonuses
• Integrated multiple third-party data sources (REST APIs and RSS feeds) with normalization, deduplication, and
incremental fetching pipelines
• Designed and implemented a multi-wallet architecture (available, frozen, system-credit types) with atomic
transactions using database-level locks for financial consistency
• Developed an internal admin dashboard (React + Chart.js) with real-time metrics visualization, user growth
analytics, revenue tracking, and data export to Google Sheets
• Implemented a rule-based matching engine that evaluates new job postings against user-defined filters (role,
stack, salary range, timezone, keywords) with weighted scoring for alert prioritization
• Managed application infrastructure including multi-environment hosting on EC2, centralized logging, CI/CD
pipelines, and automated backup strategies
• Integrated Sanity.io as a headless CMS for blog/articles, SendPulse for email marketing, and Plausible for
privacy-friendly analytics

SMISS Ltd. Ukraine hybrid
Time Tracking System | Full-Stack Engineer Jun. 2019 – Jul. 2023

Description: SaaS HR & workforce management platform covering the full employee lifecycle, from candidate
assessment to time tracking, employee scheduling, asset management, and custom analytics reporting
Stack: TypeScript, React, MobX, Node.js, Express.js, typeORM, MongoDB, Docker, Sentry, nginx
Responsibilities:
• Developed and maintained REST API endpoints for core platform modules (time tracking, employee
management, scheduling)
• Built and improved frontend features using React, collaborating with the design team on UI implementation
• Integrated third-party services and ensured data consistency across modules
• Participated in code reviews and contributed to improving code quality and test coverage
• Fixed bugs, handled edge cases, and supported platform stability in production