Go-first Systems Engineer — high-throughput, stateless architectures & production-grade rewrites of complex legacy systems
Dhaka, Bangladesh 🇧🇩 · shaswata.me
I design distributed, security-critical systems and turn heavyweight legacy stacks into lean, horizontally-scalable services.
Open to high-impact systems & platform engineering roles at globally distributed, high-performance technology companies.
| Outcome | |
|---|---|
| 🚀 Production Go rewrite — solo | Re-engineered a full Identity Provider from ASP.NET MVC 5 / .NET 4.7.2 → Go + Chi with complete feature parity (OAuth 2.0, OIDC, SAML SP+IdP, SCIM, MFA/TOTP). Shipped a single 44 MB static binary, container GB-scale → ~2 MB distroless, 5× smaller dependency surface — delivered in ~8 weeks against a 15–16 week estimate |
| 📐 Elastic scale | Stateless redesign unlocked horizontal autoscaling (2–6 pods) on Kubernetes, replacing a session-pinned single-VM legacy |
| 🗄️ Database modernization | SQL Server / Entity Framework → MongoDB, +40% faster feature cycles; eliminated SQL Server entirely |
| 💰 Cloud cost optimization | Automated backup / restore across DB, S3 & persistent storage — −35% infra cost for inactive workspaces |
| ⚡ Performance engineering | Ported a high-throughput .NET microservice to Go — −60% latency, −70% memory |
| 🤖 AI at enterprise scale | Architected XatBot, an LLM + RAG tax assistant grounded in 70k+ legal documents |
- Go-first backend — stateless microservices, CQRS, event-driven systems, REST/gRPC, low-latency design, Redis-backed caching.
- Security & identity — OAuth 2.0, SAML (SP + IdP), OpenID Connect, SCIM, RFC 6238 TOTP/MFA, magic-link, device registration, granular RBAC, OWASP mitigation.
- Polyglot interoperability — custom SignalR ↔ RabbitMQ bridge for bidirectional Python ↔ .NET communication inside a shared enterprise ecosystem.
- AI systems — LangChain, RAG, vector databases; LLM agents grounded in domain data with usage/engagement analytics.
Software Engineer .................... Mar 2024 – Present
Associate Software Engineer .......... Mar 2022 – Feb 2024
Software Engineer Intern → Full Time . Sep 2021 – Feb 2022
- Sole production owner of the Identity Provider serving enterprise financial / tax-compliance clients — including the ground-up Go rewrite, incident response, and security hardening (CSP, RBAC, isolated admin domain).
- Established Go as a production language at the company: an early R&D port (−60% latency, −70% memory) laid the groundwork for later full-system rewrites.
- Drove customer-facing delivery — Net Operating Loss calculation module and rating system (Angular + C#/.NET) on a global financial-compliance product — and mentored junior engineers on secure architecture.
🎓 B.Sc. in Software Engineering — Shahjalal University of Science & Technology (2023)
Languages & frameworks
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Backend & data
Security & identity
AI & infrastructure
| Project | What it is |
|---|---|
| Cirq — Google Quantum AI | Contributor — clarified docs & parameterization of CZPowGate, merged upstream. |
| GenericAI | Agentic AI assistant on the ReAct framework — LangChain tool reasoning, web browsing, PDF analysis. |
| microOS | Minimal OS — loader, bootstrap, IDT, kernel. Runs on QEMU / bare metal. |
| klogger | A Linux kernel module keylogger. |
