Fullstack Developer at ATOM Solutions JSC (2024-02 – 2026-04)
Contributed as a fullstack developer across 3 production projects, designing high-concurrency distributed services, dynamic frontend, and deploying development infrastructure across fintech, ERP/Odoo, and blockchain domains.
Fullstack Developer - Project 1: SaaS ERP Platform (Merchant Management & Sale Ecosystem) at ATOM Solutions JSC (2024-08 – 2026-04)
Contributed to the design and implementation of backend & dynamic frontend web application for Merchant Management System and Merchant Portal. Enabling flexible configuration for each customer hosting this platform.
- Contributed to the design and implementation of backend & dynamic frontend web application for Merchant Management System and Merchant Portal. Enabling flexible configuration for each customer hosting this platform.
- Implemented multi-tenant architecture and SaaS model.
- Integrated with BVBank Digistore Open APIs for merchant onboarding, payment processing.
- Built POS management service to provision and activate POS machines for merchants.
- Built payment integration service for Virtual Account management and QR code generation.
- Built a webhook to process callback from BVBank Digistore, and developed a background worker to handle IPN for Card & QR transactions and notify real-time payment completion.
- Customized Odoo 18 modules including Inventory, Sale, Accounting, Point of Sale, Discount & Loyalty.
- Developed an e-invoice module integration with M-Invoice provider.
- Implemented centralized authentication using APISIX API Gateway across all services.
- Extended Keycloak using custom Java SPIs for Single Sign On.
- Deployed development infrastructure including Postgres, Kafka, APISIX, Keycloak, EMQX on Docker, Nginx with Cloudflare domain mapping.
- Leveraged Openclaw, Ollama, and Codex Tool to implement an AI-workflow for analyzing BRD docs and implementing minimum features.
Fullstack Developer - Project 2: Blockchain Wallet Application at ATOM Solutions JSC (2025-01 – 2026-02)
Designed and built 4 Golang microservices using Clean Architecture, event-driven design with Kafka, supporting 100K+ users on Solana and EVM chains.
- Designed and built 4 Golang microservices using Clean Architecture, event-driven design with Kafka, supporting 100K+ users on Solana and EVM chains.
- Developed a secure service to handle wallet key access with high security, deployed on AWS Nitro Enclaves.
- Applied event-driven design and concurrency for wallet creation, recovery, handling transactions, token transfers, coin swaps.
- Developed real-time alerts via WebSocket and notification email via AWS SES.
- Built a scanner service with concurrency to monitor transaction on-chain and update status.
- Implemented RSA to encrypt Kafka messages with a public key and decrypt with a private key to secure messages.
- Deployed proxy functions on AWS Lambda using AWS API Gateway & Cognito authentication to secure third-party API keys in AWS Secrets Manager.
- Worked with DevOps on AWS to set up API Gateway and deploy Lambda functions.
Fullstack Developer - Project 3: Online Booking Platform at ATOM Solutions JSC (2024-02 – 2024-11)
Built bus ticketing and hotel booking platform integrating Vexere Open APIs.
- Built bus ticketing and hotel booking platform integrating Vexere Open APIs.
- Designed and built Admin Panel for order, voucher, user, and config management.
- Implemented race-condition-safe voucher redemption using PostgreSQL row-level locking.
- Integrated Elasticsearch to optimize booking search and retrieval performance.
