SBAbout Shishir
I help startups and enterprises design, build, and scale reliable backend and cloud systems. With 9+ years of backend engineering (Python, Java, Node.js) and 4+ years of frontend development (React, TypeScript), I deliver end-to-end solutions — from system design to production-ready applications.
What sets me apart is my track record of scaling high-traffic platforms:
- Built trading systems processing 10K+ events/second with <50ms latency
- Designed infrastructure at Bolt serving 30M+ daily transactions across 15+ countries
- Migrated monoliths to microservices, driving 30–70% performance gains and 30% revenue growth
- Led cross-functional teams and mentored engineers to deliver consistently high-quality results
I typically work on:
- Backend systems & APIs (Python, Java, Node.js, Postgres, Redis, Kafka)
- Cloud infrastructure & automation (AWS, Kubernetes, Terraform, CI/CD)
- Distributed systems & microservices architecture
- Frontend development with React & TypeScript
- System design & technical leadership for scaling projects
Whether you need to accelerate a product launch, improve performance, or scale infrastructure, I bring both the technical depth and leadership experience to deliver measurable impact.
English
Native or bilingual
German
Conversational
Can work on-site
Berlin (up to 50km)
Experience
- ScaleUpFounder, Lead EngineerSeptember 2024 - Today (1 year and 9 months)Berlin, Germany• Built 3 trading algorithms processing 10K+ market events/second• Achieved <50ms trade execution latency with 99.9% uptime• Designed backtesting engine processing 5 years historical data• Built infrastructure supporting 50+ concurrent users with auto-scaling• Bootstrapped ScaleUp to profitability from day one, generating ₹50,000 inmonthly revenue with a user retention rate of 75%.
- BoltTech Lead, Platform teamNovember 2022 - August 2024 (1 year and 9 months)Berlin, Germany• Designed compliance systems: 30M+ daily transactions, 15+ countries• Built vehicle blocking system contributing 2.5% GMV uplift• Designed GDPR exporter handling TB-scale data processing• Implemented DAC7 platform with automated regulatory reporting• Built rate limiting service: 100K+ requests/minute capacity
- BoltSenior Engineer, Platform teamAugust 2021 - October 2022 (1 year and 2 months)Berlin, Germany• Optimized database queries: 500ms → 50ms response time• Built compliance automation reducing manual work by 80%• Designed notification service for millions of users• Mentored 3 engineers on system design and performance• Notification system for compliance checks• Vehicle blocking system: Automation project company licenses Europe.
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Education
- Bachelor of Technology (B.Tech)Shri Guru Gobind Singhji Institute of Engineering and Technology2018Bachelor of Technology (B.Tech)