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I’m a senior full-stack engineer with more than nine years of experience designing, building, and shipping reliable digital products. I’ve worked across React, React Native, Node.js, TypeScript, Java, Spring, C#, Python, MongoDB, PostgreSQL, and AWS, often taking ownership of systems from architecture and infrastructure through to user-facing delivery. At FrogCo, I was the sole architect and primary builder of FrogBox Play, a streaming platform now serving more than 30,000 users and 1.8 million automatically ingested clips. I enjoy working on complex, real-time products and turning legacy systems into maintainable, observable platforms. My experience includes microservices, event-driven pipelines, WebSockets, video processing, data visualisation, DevOps, and AI-assisted workflows, including a production LLM vision pipeline with approximately 95% reviewer acceptance. I’m a collaborative, hands-on engineer who is comfortable leading architecture, reviewing code, modernising development practices, and helping teams deliver confidently.…I’m a senior full-stack engineer with more than nine years of experience designing, building, and shipping reliable digital products. I’ve worked across React, React Native, Node.js, TypeScript, Java, Spring, C#, Python, MongoDB, PostgreSQL, and AWS, often taking ownership of systems from architecture and infrastructure through to user-facing delivery. At FrogCo, I was the sole architect and primary builder of FrogBox Play, a streaming platform now serving more than 30,000 users and 1.8 million automatically ingested clips. I enjoy working on complex, real-time products and turning legacy systems into maintainable, observable platforms. My experience includes microservices, event-driven pipelines, WebSockets, video processing, data visualisation, DevOps, and AI-assisted workflows, including a production LLM vision pipeline with approximately 95% reviewer acceptance. I’m a collaborative, hands-on engineer who is comfortable leading architecture, reviewing code, modernising development practices, and helping teams deliver confidently.

Andrei Sevtsenko

Full Stack Developer, Software Engineer, Web Developer, +2

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I’m a senior full-stack engineer with more than nine years of experience designing, building, and shipping reliable digital products. I’ve worked across React, React Native, Node.js, TypeScript, Java, Spring, C#, Python, MongoDB, PostgreSQL, and AWS, often taking ownership of systems from architecture and infrastructure through to user-facing delivery. At FrogCo, I was the sole architect and primary builder of FrogBox Play, a streaming platform now serving more than 30,000 users and 1.8 million automatically ingested clips. I enjoy working on complex, real-time products and turning legacy systems into maintainable, observable platforms. My experience includes microservices, event-driven pipelines, WebSockets, video processing, data visualisation, DevOps, and AI-assisted workflows, including a production LLM vision pipeline with approximately 95% reviewer acceptance. I’m a collaborative, hands-on engineer who is comfortable leading architecture, reviewing code, modernising development practices, and helping teams deliver confidently.…I’m a senior full-stack engineer with more than nine years of experience designing, building, and shipping reliable digital products. I’ve worked across React, React Native, Node.js, TypeScript, Java, Spring, C#, Python, MongoDB, PostgreSQL, and AWS, often taking ownership of systems from architecture and infrastructure through to user-facing delivery. At FrogCo, I was the sole architect and primary builder of FrogBox Play, a streaming platform now serving more than 30,000 users and 1.8 million automatically ingested clips. I enjoy working on complex, real-time products and turning legacy systems into maintainable, observable platforms. My experience includes microservices, event-driven pipelines, WebSockets, video processing, data visualisation, DevOps, and AI-assisted workflows, including a production LLM vision pipeline with approximately 95% reviewer acceptance. I’m a collaborative, hands-on engineer who is comfortable leading architecture, reviewing code, modernising development practices, and helping teams deliver confidently.

Available to hire

I’m a senior full-stack engineer with more than nine years of experience designing, building, and shipping reliable digital products. I’ve worked across React, React Native, Node.js, TypeScript, Java, Spring, C#, Python, MongoDB, PostgreSQL, and AWS, often taking ownership of systems from architecture and infrastructure through to user-facing delivery. At FrogCo, I was the sole architect and primary builder of FrogBox Play, a streaming platform now serving more than 30,000 users and 1.8 million automatically ingested clips.

I enjoy working on complex, real-time products and turning legacy systems into maintainable, observable platforms. My experience includes microservices, event-driven pipelines, WebSockets, video processing, data visualisation, DevOps, and AI-assisted workflows, including a production LLM vision pipeline with approximately 95% reviewer acceptance. I’m a collaborative, hands-on engineer who is comfortable leading architecture, reviewing code, modernising development practices, and helping teams deliver confidently.

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Work Experience

Full Stack Engineer at FrogCo

May 1, 2024 - May 1, 2026

Sole architect and primary builder of FrogBox Play, a short-form sports highlights and live-streaming platform serving more than 30,000 users with 1.8 million auto-ingested clips. Delivered React, React Native, Next.js, Node.js, Fastify, PostgreSQL, AWS CDK, Lambda, Cognito, observability, social features, video workflows, and AI-assisted highlight correction. Built PlayAI, a greenfield generative video platform integrating HeyGen, ElevenLabs, Google Translate, and ffmpeg. Also led infrastructure standardisation, framework migrations, Node.js upgrades, legacy-tool replacement, and ownership of the C#/.NET video-control backend.

Senior Software Engineer at Hampr

September 1, 2023 - April 1, 2024

Designed and shipped the Individual Meal feature across the Express, Sequelize, and Next.js platforms. Centralised authentication across approximately 200 frontend files, modernised backend architecture with controller, service, and repository layers, and removed more than 22,000 lines of dead code. Rebuilt local development using Docker Compose and delivered AWS CDK infrastructure with Aurora PostgreSQL, ECS Fargate, networking, secrets management, CI/CD, and Sentry integration.

Principal Engineer at Socialites

March 1, 2023 - September 1, 2023

Owned end-to-end delivery for a two-sided marketplace spanning social feeds, profiles, search, bookings, identity verification, notifications, and real-time chat. Built eight Java 17 and Spring Boot microservices over MongoDB and Redis, with a Next.js and React frontend, AWS CDK infrastructure, ECS Fargate, CI/CD, and Grafana observability. Implemented WebSocket/STOMP chat, KYC verification, and booking safety workflows including check-in deadlines, location tracking, and emergency-contact escalation.

Software Architect at Consunet

October 1, 2022 - March 1, 2023

Designed and implemented a configuration-driven Node.js ETL service that ingested files from network shares, FTP, and other sources, parsed CSV, XML, and proprietary defence formats using YAML-defined schemas, and routed transformed data to configurable destinations. Evaluated Kubernetes container-security tools including Falco, kube-bench, and kube-hunter, and contributed to a DevSecOps maturity model with automated recommendations and radar-chart visualisations.

Software Architect at Complexica

March 1, 2021 - September 1, 2022

Promoted to Software Architect and led three enterprise engagements across port logistics, healthcare, and consumer products. Architected a real-time container-placement and straddle-carrier job-queueing platform using Java, Spring, MongoDB, AWS, Python, and Next.js. Led a healthcare engagement platform with PostgreSQL, ETL pipelines, scoring services, SAML SSO, and executive dashboards. Introduced AWS CDK, ECS Fargate, automated CI/CD, and Grafana, Loki, Tempo, and Prometheus observability practices.

Software Developer at Complexica

December 1, 2020 - March 1, 2021

Reworked a report-generation pipeline by replacing a monolithic SQL query with parallelised queries and application-layer aggregation, reducing runtime from approximately 46 minutes to 30 seconds. Modernised a legacy React portal with interactive table components and optimised nightly ETL processing through query tuning, parallelisation, and application-layer computation, reducing runtime from approximately 13 hours to two hours.

Support Developer → Support Team Leader at CentricMinds

January 1, 2017 - July 1, 2020

Helped establish the company’s first dedicated support function for a Java and Tomcat multi-tenant CMS serving 45 enterprise clients. Progressed to team leader, managing up to five engineers across hiring, training, performance, and task allocation. Reduced the support backlog by approximately 85% through FreshDesk automation, triage procedures, and diagnostic tooling. Designed a cross-region SQL Server read-replica architecture and built a self-service upgrade portal that reduced client upgrade timelines by more than 50%.