Jarmo Isotalo

Token Terminal extracts, standardizes, and delivers financial and alternative data on blockchains, decentralized applications, and tokenized assets. I built the company's technical foundation from inception and lead overall technology strategy and engineering.

• Scaled blockchain coverage from 30 to 120+ full integrations by co-authoring and driving the implementation of a distributed, scalable proprietary indexing infrastructure (TypeScript, Kubernetes), including full entity-level data across each chain
• Co-authored the architecture of a near real-time indexing system (Go), achieving ~1.5s latency from block finalization to BigQuery across Solana and major EVM chains
• Architected and implemented a multi-chain decoding framework, later scaled by the team across EVM, Solana, Cosmos, Move, Polkadot, and Stacks ecosystems, enabling full historical contract decoding (EVM <1 min)
• Co-designed an ELT-first data platform spanning multiple dbt projects, managing 4PB+ in BigQuery; SQL-based transformations power the public API and enterprise data products
• Reduced infrastructure costs by up to 60% through granular GCP cost attribution, query optimization, and system design improvements
• Established institutional-grade data quality standards, enabling partnerships with Bloomberg, Google, Binance, CoinGecko, CF Benchmarks, and Nansen, reaching tens of millions of users globally
• Built and scaled the engineering organization into specialized Data and Platform teams: Data handles ingestion, processing, and metric computation; Platform owns the public API, web, and integrations (Google Sheets, Excel, Bloomberg)
• Cultivated a high-performance remote engineering culture grounded in Nordic principles: ownership, flat hierarchy, sustainability, and execution bias

One of three founding engineers building and scaling the Now.sh hosting platform, which evolved into Vercel.

• Co-designed the transition from container-based hosting to fully serverless infrastructure, forming the foundation of the Vercel platform
• Owned the design and implementation of multi-region infrastructure and global request routing, scaling from a single datacenter to globally distributed deployments across AWS and GCP
• Contributed to the implementation of a global anycast DNS network routing traffic to the nearest region, and led the integration of Cloudflare CDN across all customers
• Led multiple zero-downtime database migrations across PostgreSQL, Redis, and distributed systems (e.g. Cosmos DB), enabling global scalability and reliability
• Owned the ZEIT Gateway, the core edge layer handling SSL termination, routing, autoscaling, and high-volume traffic management
• Managed and scaled large Kubernetes clusters supporting production workloads
• Expanded role into COO, partnering with the CEO on sales strategy, managing enterprise customer relationships, and building internal analytics to track platform growth
• Organized ZEIT Day conferences in Berlin and San Francisco

Built the data infrastructure and analytics capabilities for Gatsby's open-source framework and Netlify's cloud platform.

• Designed and implemented a privacy-compliant telemetry system capturing error rates, performance timings, and usage patterns to inform product roadmap decisions
• Built end-to-end data ingestion pipelines with dbt workflows for metrics tracking and reporting
• Established company-wide analytics by integrating BigQuery with Looker, enabling north-star dashboards and team-level metrics

Worked on the internal Telephony Team. Built telephony systems in Java using Google's internal stack; configured monitoring and alerting; conducted training for support and on-call engineers.

Tech lead for TestMyCode at RAGE Research Group. Led two scrum teams (7 developers) building educational tooling.

• Co-authored a custom testing framework for Java, Python, and C using reflection APIs and annotation-based grading
• Architected secure code execution using sandboxing to isolate student code
• Launched mooc.fi, University of Helsinki's free online learning platform, now used as a university entrance exam serving tens of thousands of participants globally