KAZI FARDINISLAM
I build production-grade systems — role-based APIs, multi-provider LLM gateways, real-time platforms — backed by real test suites and Dockerized infra, not MVP scope.
for hire
Kazi Fardin Islam · DhakaAbout
Three identities, one problem-solving foundation. Which one leads depends on the role — but the depth is the same.
Backend / Full-stack Engineer
REST APIs, role-based authorization and relational data models — most fluently in Node.js/Express and FastAPI/Python over PostgreSQL, with Next.js, React and TypeScript on the front end.
Systems-minded Builder
Designs microservice architectures, API gateways and state machines from scratch — backed by real test suites and Dockerized infra rather than stopping at MVP scope.
AI-adjacent Engineer
Integrates LLM APIs (Gemini, Groq, OpenRouter) into production-style systems and uses AI coding agents as a core workflow — with human verification of AI output as a differentiator.
Skills
Software Engineering
- REST API design & implementation
- RBAC + ownership-scoped authorization (resource-level)
- Relational DB design & ORM (raw PostgreSQL/MySQL, EF Core)
- State machine design with server-side invariants
- Microservices & API gateway patterns
- Automated testing (auth-focused, no mocking frameworks) — 86 real xUnit auth tests on OnnoRokom
- Structured logging & observability (Serilog)
- Containerization (Docker Compose)
AI / ML-Adjacent
- LLM API integration (Gemini, Groq, OpenRouter)
- Multi-provider gateway w/ failover & typed errors
- Atomic Redis/Lua quota accounting
- AI-assisted dev workflows & output verification
- Applied ML exposure (thesis: transcriptomic translation)
Problem Solving
- Advanced algorithms & data structures (CF Specialist 1584)
- CP coaching (recursion, backtracking, graphs)
- Contest problem authorship
Collaboration & Leadership
- Cross-functional coordination (5-member exec committee)
- Technical event planning & delivery
- Fast learner in cross-functional environments
Projects
Five projects — every bullet traces to real work. No fabricated metrics, no filler.
OnnoRokom Assignment System
Complete- Admin/Teacher/Student roles with strict ownership-scoped access, verified by dedicated auth test suites.
- Server-side deadline/resubmission state machine — 86 xUnit tests (real ClaimsPrincipal + IAuthorizationService vs EF Core InMemory).
- Serilog logging, paginated/filtered endpoints across 5 controllers, 5-trigger notifications.
- 3-service Docker Compose stack validated end-to-end vs live Postgres.
LLM Gateway
Ongoing- Unified Gemini/Groq/OpenRouter behind one OpenAI-compatible contract for provider-agnostic access.
- Provider-adapter protocol with a typed error taxonomy driving mid-stream failover — zero duplicate output.
- Canonical message schema + atomic Redis/Lua quota accounting across heterogeneous limits.
- BYOK key resolver with shared-pool-first, private-key-upgrade flow.
ICEntral
Complete- Centralized API gateway + modular services for auth, users, posts, jobs and chat.
- JWT auth + RBAC for protected routes, moderation workflows and alumni verification.
- Feed posts, collaboration requests, job applications, notifications and real-time messaging.
Food Delivery + AI Health
Complete- Cross-platform mobile app pairing food ordering with personalized health tracking.
- Authentication, health-metric tracking and real-time data synchronization.
- Gemini API integration for personalized nutrition insights.
llm-guard-probe
Tool- CLI-based regression-testing harness for the OWASP LLM Top 10.
- Explores LLM safety failure modes as a security-adjacent project.
Competitive Programming & Hackathons
Codeforces Specialist
Peak rating 1584, built through consistent rated-contest performance.
2× ICPC Finalist
Dhaka Regional Finalist (2024, 2025) — ranked 48th/310+ in 2025.
IUPC Finishes
MU 31st/91 · BUET 46th/110 · CUET 62nd/130.
Hackathons
HackTheAI by SmythOS (29th/100+ prelim), InnovateX 2026, BUET GameJam 2023 (11th prelim).
Author & Coach
Contest problem authorship + coaching in recursion, backtracking & graph algorithms.
Game Jams
IUT 12th ICT Fest 2026 GameJam & BUET GameJam — mechanically-driven concepts.
Research & Publications
Best Paper Award
ICTDsC 2024- Best Paper award at ICTDsC 2024, published in Springer's Lecture Notes in Networks and Systems.
BSc Thesis — TransComp-R
2026- A replication/validation study of TransComp-R, a cross-species transcriptomic translation method — applied ML depth beyond coursework.
Experience
Programming Instructor & Problem Setter
- Coached students in competitive programming — recursion, backtracking, graph algorithms and strategy.
- Authored problems for an Inter-University Contest (Intl. Girls in ICT Day) with IEEE BS, WIE & RUSB.
Vice President
- Directed a 5-member executive committee delivering technical seminars, workshops and student events.
- Oversaw event coordination and team communication, growing student participation.
Education
University of Rajshahi — Rajshahi, Bangladesh
- Relevant coursework: Data Structures & Algorithms, OOP (Java), DBMS, Computer Networks, Software Engineering, Artificial Intelligence & Neural Networks, Cryptography.
LET'S BUILD
Open to entry-level software engineering roles. The fastest way to judge the code is to read it.
View Projects →