Valentine Shishkin

Fullstack Software Engineer · C#/.NET · Go · React/TypeScript

I build backend services and React interfaces, from design through deployment and support. About four years of commercial experience, mainly in C#/.NET and React. My work includes logistics integrations, geospatial search, and Kafka workflows.

Rolled out pickup-point search across city boundaries
Weekly overloads → several months without related alerts

Work Experience

Current title: Leading Developer

versta.io / ООО «Цифровая логистика»

June 2024 — present

B2B platform for comparing delivery options across logistics providers, placing and tracking orders, automating customer-specific workflows, and exchanging electronic shipping documents.

Develop microservices and Kafka workflows, integrate logistics and electronic document exchange providers via APIs, and build OAuth 2.0 services and React interfaces.
Managed the team from February to September 2026; since September, my focus has been technical leadership. Introduced designated reviewers and shared responsibility for changes, and gradually added automated tests and development conventions.
Built a CLI for working across the platform’s repositories, including local setup, database migrations, and diagnostics.

Junior Backend Developer

Studio Mobile / Qoden

June 2022 — January 2024

Trading software for a cryptocurrency exchange.

Developed backend modules, API endpoints, and Blazor administration panels.
Implemented service interactions using IObservable/ReactiveX and wrote automated tests.
Investigated PostgreSQL queries and execution plans; documented architecture with UML.

Selected work

Backend and frontend

Authentication and user management

An OAuth 2.0 service with React interfaces for login, users, and roles.

My work: I design and implement the backend, BFF, and frontend, and maintain the CI and deployment configuration.

C#ASP.NET CoreOAuth 2.0ReactTypeScript

Service migration

Pickup-point search

Pickup-point search was limited to individual cities, and provider data was refreshed during customer requests.

My work: Replaced the Redis-based storage with a PostgreSQL/PostGIS service. Moved provider updates to a schedule, migrated consumers in stages, and retired the old integration code.

Result: Customers can search across city boundaries and filter by cargo requirements and available services. Support can correct provider data without losing those changes on the next refresh.

PostgreSQLPostGISgRPCRESTGrafana

Production troubleshooting

Reliable Kafka workflows

An event processor overloaded weekly, delaying support tasks and order transfers. Adding replicas did not help.

My work: Found and fixed problems in the Kafka configuration and our internal Kafka wrapper, and separated heavy workloads. Added dead-letter queues and switched critical services to manual offset commits.

Result: No related overload alerts occurred for several months after the changes.

Apache KafkaKubernetes

Skills

Backend

C#
.NET
Go
Python
ASP.NET Core
REST
gRPC

Commercial focus: C#/.NET. Go: astronomy bot; Python: academic research.

Frontend

React
TypeScript
JavaScript
Blazor

Data & Messaging

PostgreSQL
PostGIS
Entity Framework
Dapper
Redis
Apache Kafka

Delivery & Operations

Kubernetes
CI/CD
Grafana
Database migrations

Engineering Practices

Code review
Automated testing
CLI tooling

Education

Master’s degree · Artificial Intelligence and Big Data Technologies

Saint Petersburg State University, Faculty of Applied Mathematics and Control Processes

2024

Bachelor’s degree · Programming and Information Technology

Saint Petersburg State University, Faculty of Applied Mathematics and Control Processes

2021

My master’s thesis focused on training neural networks to study edge-on galaxies. I follow advances in machine learning and intend to continue research.

Languages

Russian Native

English C1

Beyond work

Astronomy bot ↗

Building a Telegram bot in Go to monitor astronomical events for the Laboratory of Observational Astrophysics at Saint Petersburg State University.

Get in touch

Open to remote development roles

I’m looking for remote backend and fullstack roles using .NET, Go, or Python. I’m also open to working with other stacks.

Email me

Telegram ↗ GitHub ↗

valentinnsh@gmail.com · t.me/valentinnsh · github.com/valentinnsh · Remote · Worldwide · valentinshishkin.dev

Work Experience

Current title: Leading Developer June 2024 — Present

versta.io / ООО «Цифровая логистика»

B2B logistics platform: delivery comparison, ordering, tracking, and electronic documents

Pickup-point search: Designed and rolled out a PostgreSQL/PostGIS service replacing Redis storage. Enabled cross-city search, decoupled provider refreshes from customer requests, and migrated all consumers.
Kafka reliability: Resolved weekly event-processor overloads by fixing Kafka configuration and wrapper issues and separating heavy workloads. Added DLQs and manual commits; no related overload alerts for several months afterward.
Identity & access: Design and implement an OAuth 2.0 service, BFF, and React interfaces for login, users, and roles, including CI and deployment configuration.
Integrations: Develop microservices and React interfaces; integrate logistics and electronic document exchange providers via APIs.
Tooling & leadership: Built a CLI for local setup, migrations, and diagnostics. Managed the team February–September 2026; continue technical leadership, with designated reviewers, shared accountability, and automated tests.

Junior Backend Developer June 2022 — January 2024

Studio Mobile / Qoden

Trading software for a cryptocurrency exchange

Trading platform: Developed backend modules, APIs, and Blazor administration panels. Implemented service interactions using IObservable/ReactiveX.
Database & testing: Investigated PostgreSQL queries and execution plans; wrote automated tests; documented architecture with UML.

Technical Skills

Backend: C#/.NET, ASP.NET Core, REST, gRPC; Go (project), Python (research)

Frontend: React, TypeScript, JavaScript, Blazor

Data & Messaging: PostgreSQL, PostGIS, Entity Framework, Dapper, Redis, Apache Kafka

Delivery: Kubernetes, CI/CD, Grafana, database migrations

Practices: Code review, automated testing, CLI tooling

Education

Saint Petersburg State University

Faculty of Applied Mathematics and Control Processes

Master’s in AI and Big Data Technologies (2024) · Thesis: neural networks for studying edge-on galaxies
Bachelor’s in Programming and Information Technology (2021)

Languages & Projects

Russian: Native · English: C1

Go: Telegram bot monitoring astronomical events for SPbU’s Laboratory of Observational Astrophysics.

github.com/valentinnsh/SkyHelperV2