Aleksei Klimov
@alekseiklimov
Senior Product and full-stack engineer building and launching data-intensive fintech and data products end-to-end.
MontenegroWhat I'm looking for
I’m a senior product and full-stack engineer with 10+ years of experience building and launching data-intensive web, mobile, desktop, and backend products for international clients. My strongest work is in the TypeScript/JavaScript ecosystem: Node.js, React, React Native, PostgreSQL, Redis, and event-driven integrations.
As the first engineer and technical lead on a fintech product, I took it from idea and architecture to production APIs, analytics dashboards, React Native applications, CI/CD, and App Store release. I’m comfortable working directly with founders, turning incomplete requirements into a delivery plan, making pragmatic architecture decisions, and owning a product after launch.
My independent consulting record includes $100K+ billed across 13 contracts and 2,570 tracked hours. I deliver across discovery, architecture, implementation, deployment, and ongoing support, balancing long-running engagements with shorter, well-scoped architecture and data-delivery projects.
I’m particularly effective in early-stage fintech, SaaS, and data products that need hands-on end-to-end ownership—whether it’s Node.js services enriching market data and building dashboards and notifications, or transforming static PDF content into interactive, collaborative knowledge spaces. I also maintain the open-source Electronium project, a zero-dependency TypeScript IPC bridge for Electron, reflecting how I build pragmatic, maintainable developer tooling.
Experience
Work history, roles, and key accomplishments
Independent Software Engineer
Self-employed (International Clients)
Jan 2012 - Present (14 years 6 months)
Delivered production software for international clients across fintech, education, real estate, marketplaces, and e-commerce, covering discovery through ongoing support. Worked directly with founders and product owners to clarify scope, manage delivery risks, choose maintainable architecture, and ship usable increments.
First Engineer and Tech Lead
GanymApp
Jan 2023 - Jan 2025 (2 years)
Led a fintech product from initial architecture through production release across backend, web administration, analytics, and React Native mobile applications. Built Node.js services for market-data enrichment, APIs/workflows for portfolio and notifications, and handled the iOS/Android App Store submission and approval process.
Full-Stack Engineer
Selfbeam
Jan 2021 - Jan 2023 (2 years)
Developed frontend and backend features for a platform that transforms static PDF content into interactive, collaborative knowledge spaces. Implemented role-based access, collaboration, and permission workflows, contributing to long-term architecture and product evolution.
Additional Selected Client Work
International Clients
Jan 2017 - Jan 2022 (5 years)
Designed a real-estate software overlay for building layouts and map-based workflows. Contributed to a trading platform, including a NestJS service for collecting cryptocurrency market data, and delivered Vue.js frontend products with supporting data collection and database workflows.
Full-Stack Engineer
Stickeroid and StickCash
Jan 2019 - Jan 2020 (1 year)
Delivered product features and improvements across frontend and backend systems for startup products. Supported rapid prototyping and R&D in a fast-moving startup environment.
Created and maintains Electronium, a zero-dependency TypeScript IPC bridge for request/response communication between Electron main and renderer processes. Designed a bidirectional Promise-based API with type definitions, error propagation, and event listeners, including ESM/CJS packaging.
Education
Degrees, certifications, and relevant coursework
Volga State University of Technology
Engineer's Degree, Radio Engineering
Earned an Engineer's Degree in Radio Engineering at Volga State University of Technology (formerly Mari State Technical University).
Tech stack
Software and tools used professionally
Availability
Location
MontenegroAuthorized to work in
Portfolio
github.com/kingomost/electroniumJob categories
Skills
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