Abhishek Saha
architect • engineer
& designer
Latest Writing
🤖 AI / ML How LLMs Work — A Step-by-Step Explainer
From tokenization to next-token prediction: follow the full pipeline of a large language model with interactive demos at every stage.
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🤖 AI / ML Generative AI Concepts — Visual Explainer
An interactive guide to the core ideas behind generative AI: Training, Latent Space, Sampling, Fine-tuning, and Inference — with live visualizations.
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Career
Designing the parcel routing, tracking, and integration systems that move millions of packages across Sweden and the Nordics every day. Building event-driven architectures that connect carriers, retailers, and last-mile logistics.
Drove enterprise-scale digital transformation programs for Nordic clients, bridging business strategy with technical delivery. Specialised in modernising legacy systems and cloud migration roadmaps.
Led large-scale systems integration projects for Swedish industry, spanning logistics, finance, and public sector. Architected microservice solutions and mentored cross-functional engineering teams.
Six years spanning two continents — from enterprise Java platforms in Kolkata to solution architecture in Gothenburg. Built large-scale distributed systems and led offshore-onsite delivery teams.
Started the journey writing production code across three of India's top tech hubs. Built enterprise applications for global clients in finance and telecom, cutting teeth on Java, databases, and client delivery.