Open to opportunities

Vladislav Slinkin

@vladislavslinkin

Message

Senior backend developer building scalable Node.js/NestJS microservices and payment systems with system-design focus.

Serbia

Message

What I'm looking for

I’m currently open to backend opportunities (remote or Serbia-based) where I can design and ship production microservices, especially reliable payments/billing systems, using Node.js and NestJS.

I’m a Senior Backend Developer with 7+ years of experience building production-grade Microservice Architecture systems using Node.js and NestJS. I design PostgreSQL and build scalable, maintainable backend systems with strong system design, including REST and GraphQL APIs, and integrations with external services—especially when reliability and transaction volume matter.

In my recent role, I built payment and billing systems with multi-currency support, integrating Stripe (including ACH) and HubSpot for automated payments, plus rewards payout flows supporting PayPal. I also delivered an AI-powered content evaluation module (OpenAI, DeepSeek), developed automated validation and data aggregation modules (including Upfluence), and created a custom permission server for centralized role and access management—using RabbitMQ and Redis to keep systems dependable at scale.

Experience

Work history, roles, and key accomplishments

Senior Backend Developer

On The House

Jan 2023 - Nov 2025 (2 years 10 months)

Designed and maintained backend systems enabling collaboration between creators, brands, and partners across the USA, Central and South America. Built a scalable multi-currency billing system with Stripe (including ACH) and HubSpot integrations, and developed AI-powered content evaluation with provider selection and prompt versioning.

NestJS PostgreSQL RabbitMQ Redis GraphQL TypeORM Jest Stripe PayPal

Back End Developer

FYVE

Mar 2022 - Dec 2022 (9 months)

Developed backend services for a US property management platform, implementing server-side logic, API integrations, and data processing for tenant and owner management.

NestJS MongoDB PostgreSQL Sequelize Jest API Integration Data Processing Server Side Logic

Back End Developer

Fincase

Jan 2020 - Mar 2022 (2 years 2 months)

Built backend systems for client projects, including a Russian online real estate rental platform similar to Airbnb. Designed and developed microservice-based APIs and business logic using NestJS with REST/GraphQL and RabbitMQ message brokering.

NestJS TypeORM REST APIs GraphQL APIs RabbitMQ Microservices API Design Data Modeling

Full Stack Engineer

Inteltekh

Jul 2018 - Dec 2019 (1 year 5 months)

Developed retail systems, including building and deploying a self-checkout system from scratch for pilot use. Implemented device drivers and hardware communication over RS-232 and network interfaces, and integrated with SetRetail 10 via REST API.

RS 232 Network Interfacing REST APIs Self Checkout Systems System Integration