Jack Smith Insulander
I’m a backend-focused fullstack engineer based in Stockholm, Sweden, and I enjoy building high-throughput services and data-intensive applications where correctness and reliability matter.
About
I’m a backend-focused fullstack engineer based in Stockholm, Sweden, and I enjoy building high-throughput services and data-intensive applications where correctness and reliability matter. I work comfortably end-to-end—from API and system design to implementation and operational hardening—often using Rust and TypeScript, alongside PostgreSQL and MongoDB.
Across projects, I’ve contributed to performance-critical systems like real-time trading backends, built multithreaded service architectures, and supported production delivery with clean tooling and CI/CD. I’m also deeply interested in secure systems and applied AI workflows, including TEE-based designs and modern LLM tooling such as Claude, Cursor, and MCPs.
- 3 years' experience
- Joined September 2026
Skills· 17
Languages
- SwedishFluent
- EnglishFluent
Industry experience
- Software & Internet
- Financial Services
- Education
- Professional Services
- Computers & Electronics
Work experience· 4 roles
Designed and implemented backend services in Rust with PostgreSQL to support high-throughput data processing and API endpoints. Contributed to a real-time trading system (central limit order book), emphasizing performance, correctness, and resilience. Researched and implemented secure signing solutions using Trusted Execution Environments (TEEs). Built internal tools and demo interfaces using React and Next.js for internal and client use.
Contracting-focused fullstack work centered on shipping production-ready features. Prepared and delivered an educational workshop and public speaking session at EthCluj 2026, teaching engineering students how to develop for Arbitrum Stylus.
Designed and implemented a multithreaded backend system in Rust with PostgreSQL to support concurrent API workloads for data processing, integrations, and internal services. Refactored and simplified the system architecture, reducing the codebase size by over 50% while improving maintainability and performance. Served as the technical point of contact for external integrations and partners.
Education
Hire Jack Smith Insulander today
Post a job and invite Jack, or contact them directly. No hidden commission.