~/edmonton:$ whoami

Amirhossein Iravanimanesh

backend & distributed systems engineer / blockchain researcher

I build high-throughput backend services and own them in production — from API and data-model design through rollout, monitoring, and incident response. Currently an MSc researcher at the University of Alberta, working on Ethereum Layer 2 systems, Arbitrum, and Lightning Network routing.

  • 4+ yrs production backend engineering
  • ~20M user platform at TAPSI
  • ~4.5M DAU on a service I owned end-to-end
  • SSO session platform from design through staged rollout
View experience GitHub LinkedIn

open to backend, distributed systems, and blockchain engineering roles

01

Experience

Industry and academic roles, most recent first.

  1. Sep 2025 — Present

    Graduate Researcher — Blockchain & Distributed Systems University of Alberta

    Edmonton, Canada · MSc Computer Engineering

    • Research Ethereum Layer 2 and rollup execution, with implementation and benchmarking on Arbitrum testnets.
    • Write Solidity contracts and evaluate Rust/WASM execution semantics through Arbitrum Stylus.
    • Run large-scale Lightning Network simulations and build Python pipelines for benchmarking and quantitative analysis.
    • Teaching assistant for undergraduate lab courses.
    • Solidity
    • Arbitrum
    • Stylus / Rust
    • Python
    • Simulation

  2. Jan 2024 — Aug 2025

    Senior Software Engineer TAPSI

    Tehran, Iran · ride-hailing superapp, ~20M users

    • Designed and led a custom single sign-on and session-management service, including the single-logout flow, and owned it from architecture through production support.
    • Migrated traffic off the legacy authentication path gradually using API-gateway traffic splitting, backed by integration and stress testing in dedicated environments.
    • Built and operated high-throughput microservices in Go and Java/Spring Boot, including reactive services.
    • Tuned PostgreSQL queries and Redis access patterns, and investigated production issues through logs and metrics.
    • Reviewed code, led design discussions, and mentored junior and mid-level engineers.
    • Go
    • Java / Spring Boot
    • PostgreSQL
    • Redis
    • Kafka
    • Kubernetes
    • Helm
    • Terraform

  3. Jun 2023 - Mar 2025

    Research Assistant — ECT Lab Amirkabir University of Technology

    Tehran, Iran · cloud & software systems

    • Researched a resource harvester for cloud environments that predicts near-future unused memory in virtual-machine and spot settings.
    • Applied machine learning to forecast resource usage so background workloads could reclaim idle RAM.
    • Python
    • Machine learning
    • Linux / cgroup2
    • Cloud systems

  4. Jun 2022 — Dec 2023

    Software Engineer Bale Messenger

    Tehran, Iran · messaging platform

    • Owned the full lifecycle of the View and Reactions microservice in Go, serving traffic for roughly 4.5M daily active users.
    • Architected and built the Stickers and GIFs service from scratch, covering APIs, data models, deployment, and monitoring.
    • Refactored older code with clear design patterns, performed root-cause analysis on production issues, and shipped hot fixes during incidents.
    • Guided and mentored software-engineering interns.
    • Go
    • Cassandra
    • ScyllaDB
    • Redis
    • Kafka
    • NATS
    • Envoy
    • Grafana

  5. Early career

    Co-founder / Backend Engineer Bluprint

    Tehran, Iran · learning-management startup

    • Co-founded an LMS product during the shift to remote education and built its backend.
    • Shipped quickly against real customer feedback while sharing product and deployment decisions.
    • The product was later acquired by a government organization.
    • Backend APIs
    • Deployment
    • 0 → 1 product

02

Research

Blockchain infrastructure, Layer 2 execution, and decentralization measurement.

Lightning Network · research manuscript · full version available on request

Routing Centralization in the Lightning Network: A Budget-aware Perspective

Examines routing centralization as an economic question rather than a purely topological one: how much liquidity an adversary would need to sit on a meaningful share of routed payments. Introduces Budget-to-Coverage and Coverage-to-Budget as measurement lenses.

  • Formalizes Budgeted Path Coverage and shows a unit-cost special case is NP-complete even on trees.
  • Solves it with a scalable greedy approximation accelerated by CELF (cost-effective lazy forward).
  • Simulates roughly one million payments per configuration in CLoTH across six network snapshots spanning 2019–2026, using realized routing paths instead of shortest-path proxies.

Under the paper's model, coverage for a fixed BTC budget declines over time, and larger payments look less capturable.

  • CLoTH
  • Python
  • Graph algorithms
  • Large-scale simulation
Request full manuscript

Layer 2 · privacy-aware issuance

Green Credits on Arbitrum (L2-first architecture)

An end-to-end engineering prototype for the public-chain side of the Green Token methodology. Verification-gated minting and duplicate prevention run on Arbitrum Sepolia, while Ethereum Sepolia holds an anchor-only audit trail delivered through the Arbitrum outbox. Off-chain BBS+ credential issuance and presentation support selective disclosure.

  • Duplicate-resistant minting, credential binding, replay resistance, and expiry handling enforced at contract level.
  • Compared a Solidity SNARK-style verification path against a Stylus-native Rust/WASM path to isolate execution cost.
  • Automated deployment, execution, and repeated testnet benchmarking (N = 50) with average, median, and p95 reporting.

Engineering baseline with mock verifier semantics; production cryptographic verification is the next milestone.

  • Solidity
  • Arbitrum Stylus
  • TypeScript
  • BBS+
  • Outbox / L1 anchoring
Bifrost repository →

03

Open source

Backend infrastructure I built to explore systems problems end to end.

Go · message broker

Hermod

A lightweight gRPC-based message broker with concurrent message processing and pluggable storage backends. Includes load testing, monitoring, and distributed tracing, with Docker and Kubernetes deployment paths.

  • Go
  • gRPC
  • Concurrency
  • Kubernetes
  • Tracing
github.com/Amirhosein/Hermod →

Go · backend API

Alviss

A URL shortener service in Go, built around a Redis caching layer over PostgreSQL persistence with monitoring and performance tracking wired in from the start.

  • Go
  • Redis
  • PostgreSQL
  • Prometheus
github.com/Amirhosein/Alviss →

TypeScript · Layer 2 / Ethereum

Bifrost

Privacy-preserving Green Credits prototype on Arbitrum Sepolia with L1 audit anchoring through the Arbitrum outbox. Includes BBS+ credential flows, duplicate-resistant minting, and reproducible testnet benchmarking with average, median, and p95 reporting.

  • Solidity
  • Arbitrum
  • TypeScript
  • BBS+
  • Benchmarking
github.com/Amirhosein/Bifrost →

04

Stack

Grouped by where I have real production or research mileage.

backend & distributed systems

  • Go
  • Java
  • Spring Boot
  • gRPC
  • REST

Reactive Java · Event-driven · Auth & sessions · Microservices

data & messaging

  • PostgreSQL
  • Redis
  • Kafka
  • Cassandra
  • RabbitMQ
  • MongoDB

ScyllaDB · NATS · SQL tuning

platform & reliability

  • Docker
  • Kubernetes
  • Terraform
  • Prometheus
  • Grafana
  • GitHub Actions
  • Loki

Helm · Envoy · Jaeger · Load testing

blockchain & research

  • Ethereum
  • Solidity
  • Python
  • Rust
  • TypeScript
  • Pandas
  • NumPy

Arbitrum · Layer 2 · Stylus · Lightning Network · Benchmarking

05

Education & teaching

Sep 2025 — Sep 2026 (expected early graduation)

MSc, Computer Engineering

University of Alberta · Edmonton, Canada

GPA 4.00. Focus on blockchain and distributed systems: Layer 2 protocols, rollups, smart contracts, network simulation, and systems performance analysis. Teaching assistant for undergraduate labs.

Nov 2020 — Apr 2025

BSc, Computer Engineering

Amirkabir University of Technology · Tehran, Iran

GPA 3.85 (18.05/20). Strongest coursework in data structures and algorithms, operating systems, computer architecture, and computer networks. Head teaching assistant and teaching assistant across several courses.

06

Get in touch

I am interested in backend, distributed systems, and blockchain infrastructure work — and in research collaborations on Layer 2 and network measurement. The fastest way to reach me is email.

airavanimanesh@gmail.com