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Hi, I’m Sergei Gridasov, a Lead Software Engineer with two decades of experience building secure, scalable web and cloud-native platforms. I specialize in full-stack development with JavaScript/TypeScript, Node.js, React, and AWS, delivering solutions that scale to millions of users while protecting identity and data. I’m a hands-on technical leader who mentors engineers, drives architectural decisions, and champions best practices. I enjoy tackling authentication, streaming, and DRM challenges and turning complex requirements into reliable systems and measurable business impact.…Hi, I’m Sergei Gridasov, a Lead Software Engineer with two decades of experience building secure, scalable web and cloud-native platforms. I specialize in full-stack development with JavaScript/TypeScript, Node.js, React, and AWS, delivering solutions that scale to millions of users while protecting identity and data. I’m a hands-on technical leader who mentors engineers, drives architectural decisions, and champions best practices. I enjoy tackling authentication, streaming, and DRM challenges and turning complex requirements into reliable systems and measurable business impact.

Sergei Gridasov

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Hi, I’m Sergei Gridasov, a Lead Software Engineer with two decades of experience building secure, scalable web and cloud-native platforms. I specialize in full-stack development with JavaScript/TypeScript, Node.js, React, and AWS, delivering solutions that scale to millions of users while protecting identity and data. I’m a hands-on technical leader who mentors engineers, drives architectural decisions, and champions best practices. I enjoy tackling authentication, streaming, and DRM challenges and turning complex requirements into reliable systems and measurable business impact.…Hi, I’m Sergei Gridasov, a Lead Software Engineer with two decades of experience building secure, scalable web and cloud-native platforms. I specialize in full-stack development with JavaScript/TypeScript, Node.js, React, and AWS, delivering solutions that scale to millions of users while protecting identity and data. I’m a hands-on technical leader who mentors engineers, drives architectural decisions, and champions best practices. I enjoy tackling authentication, streaming, and DRM challenges and turning complex requirements into reliable systems and measurable business impact.

Available to hire

Hi, I’m Sergei Gridasov, a Lead Software Engineer with two decades of experience building secure, scalable web and cloud-native platforms. I specialize in full-stack development with JavaScript/TypeScript, Node.js, React, and AWS, delivering solutions that scale to millions of users while protecting identity and data.

I’m a hands-on technical leader who mentors engineers, drives architectural decisions, and champions best practices. I enjoy tackling authentication, streaming, and DRM challenges and turning complex requirements into reliable systems and measurable business impact.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Lead Software Engineer – Core API & Auth Team at Seven.One Entertainment Group (ProSiebenSat.1 Digital)

July 1, 2024 - Present

Lead engineer responsible for user identity, authentication, and session management across the digital ecosystem. Designed and maintained secure APIs handling millions of authentication requests daily with GraphQL federation. Implemented OAuth2, JWT, and session storage with AWS (DynamoDB, KMS, Secrets Manager). Delivered AWS-native infrastructure with CDK, SAM and Serverless framework. Automated CI/CD (GitLab pipelines).

Lead Software Engineer – Player Team at Seven.One Entertainment Group (ProSiebenSat.1 Digital)

June 1, 2024 - September 25, 2025

Promoted to Lead Engineer in 2023 for contributions to streaming platform used by millions of daily users. Drove architecture decisions, coding standards, and best practices across the team. Spearheaded integration of DRM (Widevine, FairPlay, PlayReady) and ad-tech (VAST/VPAID), boosting monetization. Delivered cross-platform React/React Native player with multiprotocol streaming (HLS, MPEG-DASH, Smooth Streaming).

Software Developer at CHECK24 Vergleichsportal GmbH

December 1, 2019 - September 25, 2025

Built automated insurance document workflow with Data Science team, reducing manual workload. Developed React/Redux frontend and Node.js microservices in Docker. Integrated ABBYY OCR and optimized system performance for scalability.

Team Lead & Co-Founder at BitWinEx (Blockchain Startup)

December 1, 2018 - September 25, 2025

Developed Ethereum smart contracts (Solidity) for tokenized investment/gaming platform. Delivered Node.js/TypeScript backend, Vue.js frontend, and MariaDB storage.

External Software Developer at Hadrian-Advisors

January 1, 2018 - September 25, 2025

Built cloud-based architecture on Kubernetes for ML/data-mining workflows. Designed APIs for data ingestion, algorithm execution, and results retrieval. Integrated with Google Cloud Storage and dynamic container builds for ML workloads.

Team Lead, Software Development at DeltaPay Ltd.

January 1, 2016 - September 25, 2025

Led team of 4 developers building payment gateway and processing systems. Delivered multi-layered processing in C#/.NET with MSMQ and MS SQL. Built secure agent administration console and scalable middleware.