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Mher Shahinyan

@mhershahinyan1

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I’m a senior full-stack engineer building reliable fintech and AI-driven platforms.

Zimbabwe

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What I'm looking for

I’m looking to build scalable fintech/AI platforms—owning architecture, secure APIs, reliability, and measurable product outcomes, with smooth production rollouts and strong observability.

I’m a senior full-stack engineer with over 10 years of experience across JavaScript/TypeScript and PHP, focused on building fintech, payments, booking, integrations, and high-load systems. I bring strong expertise in clean architecture, DDD, secure API design, testing automation, and system observability.

I’m product-minded—I define success metrics, prioritize by impact, and ensure smooth production rollouts. Under pressure, I stay calm and deliver robust, scalable solutions with a clear emphasis on reliability, security, and maintainability.

At 12Go, I built a scalable multi-tenant fintech platform using DDD, strict API contracts, and zero-downtime architecture. I designed core financial systems (multi-currency payouts, FX calculations, taxes/VAT, refunds/adjustments) with fully auditable, idempotent transaction processing and fraud protection, and I optimized high-load data and e-commerce pipelines with strict latency SLAs. I also architected an AI/LLM agent ecosystem integrating MCP servers with internal tools and built AST-based token optimization tooling that reduced context usage by ~83%, enabling AI-driven code review, debugging, and automated testing workflows.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-stack Developer

Current

12Go

Jan 2023 - Present (3 years 7 months)

Built a scalable multi-tenant fintech platform, designing core financial systems for multi-currency payouts, FX calculations, taxes/VAT, refunds, adjustments, and idempotent auditable transaction processing with fraud protection. Improved high-load performance and reliability using caching, CQRS/background workers, observability, and resilient zero-downtime deployment strategies.

Senior Full-stack Engineer

Boris Team

Jan 2020 - Jan 2023 (3 years)

Delivered multi-tenant SaaS and e-commerce products focused on scalable architectures, ETL/data pipelines, and cross-platform system design. Built an ETL-heavy music label SaaS with RBAC and audit trails, and developed an e-commerce platform and an offline-first tablet application with sync and pricing calculations.

ETL RBAC Observability CI CD Pipelines Performance Optimization Laravel Vue.Js PostgreSQL MongoDB Redis RedditMQ WebSockets Docker Nginx

Full-Stack Engineer Realtime & High-Load

Hellstore

Jan 2018 - Jan 2020 (2 years)

Built core features for a real-time gaming skins platform, including Steam OAuth, inventory sync, wallet, and trade execution flows. Developed real-time game rooms and live odds/updates via WebSockets, adding anti-fraud and rate-limiting while improving frontend/backend performance and production reliability through observability and containerized deployments.

Real Time Systems WebSockets Inventory Syncs Wallet and Trade Execution Flows Anti Fraud Rate Limits Monitoring Laravel Vue.Js Redis Nginx Docker

Full-Stack Developer

SoftCode

Jan 2017 - Jan 2018 (1 year)

Developed web products including social network functionality (feeds, user profiles, media handling, notifications) with SSR-friendly UI and performance optimizations. Maintained and rebuilt a legacy/next-gen page builder system, and implemented REST APIs, background workers, and WebSocket-based real-time/asynchronous features.

FEED Profiles Media Notifications SSR Friendly UI Versioning REST APIs WebSockets Testing Linting Performance Optimization Laravel Vue.Js Redis MySQL PostgreSQL

Full-Stack Developer

Innovate Technology

Jan 2016 - Jan 2017 (1 year)

Delivered outsourced end-to-end web products across analytics, automation, and tooling domains. Built an analytics platform with data pipelines and dashboards, developed a templated site builder with automated provisioning and deployment pipelines, and created a Vue.js Chrome Extension for workflow automation.