Антон

Anton Nguyen
[open contact info](look above in the "contact info" section)| [open contact info](look above in the "contact info" section)| Ukraine, Kyiv | Telegram
WORK EXPERIENCE
Payroll System (NDA, early-stage startup, USA) Mar. 2024. – Present
Lead Backend/Architect Remote
§ Description: SaaS payroll platform supporting crypto and fiat payments, with client-side encryption and
KYB/AML compliance.
§ Stack: Backend - NestJS, Fastify, Drizzle, Bull MQ, Keycloak, MinIO, ioredis, PostgreSQL, ethers.js,
@solana/web3.js, tronweb; Infrastructure - Docker, GitHub actions, nginx; Monitoring - Prometheus, Grafana
§ Responsibilities:
o Designed system architecture: researched zero-knowledge encryption solutions; defined system
components, relationships, and data flows visualized in diagrams using draw.io and mermaid; calculated
potential load and provided hardware specifications; compared rental costs for AWS EC2, Azure VMs,
and Hetzner instances
o Analyzed feature requirements and UI designs, created technical breakdown, and provided estimates
along with a frontend lead engineer
o Led a backend team consisting of 1 more BE developer: stand-ups, code reviews
o Delivered MVP, completed 2 iterations
o Had end-to-end responsibility for backend/DevOps features/structure
o Server/infrastructure configuration
o Performed unit, integration, and load testing
o Implemented and maintained CI/CD pipelines
o Maintained technical documentation for system architecture and APIs
o Communicated with the client: explaining technical parts of the system, sharing system costs etc.

Virtual Cards/Wallets (NDA, early-stage startup, USA) Mar. 2024 – May. 2024
Backend Engineer Remote
§ Description: Decentralized finance SaaS platform, brings everyday spending together in a secure, user-centric
platform that unifies crypto and fiat payments into a single seamless experience
§ Stack: Backend - NestJS, MikroORM, PostgreSQL, Keycloak, Auth0 (not used anymore), MinIO, ioredis,
Elasticsearch, ethers.js, @solana/web3.js, tronweb, class-validator, Passport; Scripts – Python, TypeScript, bash;
Infrastructure – Docker, Gitlab CI; Integrations – NOWPayments, Confirmo, Webacy, Metabase, Google
Gemini
§ Responsibilities:
o Migrated 300k users in production environment from Auth0 to Keycloak using Python scripts and API
for both auth providers
o Refactored payment modules and deployed changes to dev, prod environments
o Configuring postgresql replicas, fixing hanging db connections by closing up forked EntityManagers

Secure Browser Platform (NDA, established company, USA) Aug. 2024 – Nov. 2025
Full Stack Remote
§ Description: Security platform offers protection against online threats by combining secure access controls and
real-time threat detection.
§ Stack: Frontend - TypeScript, React, Plasmo, MobX, Context API; Backend - TypeScript, Fastify, Knex;
Database - PostgreSQL; Infrastructure - Docker, Kubernetes, Caddy, GitHub actions; Monitoring - Sentry,
DataDog, Metabase; Testing - Jest, Testing Library(unit), Artillery
§ Responsibilities:
o Designed, developed, and maintained applications based on business requirements
o Took part in decisions regarding architecture and code organization
o Had end-to-end responsibility for features across various components
o Perfomed unit/integration/load testing
o Implemented and maintained CI/CD pipelines
Company: SMISS Ltd. | Mobile Proxies (NDA, outsource, mid-stage startup, EU) Aug. 2022 – Jul. 2024
Lead Full Stack Remote
§ Description: SaaS solution designed to provide mobile proxies.
§ Stack: Frontend - TypeScript, React, Context API; Backend - TypeScript, NestJS, Prisma; Database - MySQL;
Infrastructure - AWS (S3, EC2), Nginx, GitHub actions; Testing – jest (unit & e2e)
§ Responsibilities
o Led full-stack development team
o Improved and integrated development processes
o Collaborate dclosely with the business and development team
o Mentored junior developers
o Provided workshops

Company: SMISS Ltd. | Time Tracking System (NDA, mid-stage startup, EU) Jun. 2019 – Aug. 2022
Full Stack Office in Ukraine, Kharkiv
§ Description: Application for tracking of working hours, tracking time spent on projects and tasks, with the
ability to generate reports for each user of the system.
§ Stack: Frontend – TypeScript, React, MobX; Backend – Node.js, Express.js, Mongoose; Database –
MongoDB; Infrastructure – Docker
§ Responsibilities
o Deleveloped and maintained backend modules
o Built reusable and modular frontend components
o Collaborated with product and development team to build new features
o Diagnosed and fixed bugs
o Maintained and improved tests

EDUCATION
O.M.Beketov National University of Urban Economy 2018-2023
Master and Bachelor of Computer Science Ukraine, Kharkiv

INTERESTS
Padel tennis, fitness training, gaming