ETHEREUM / EXECUTION
upstream repository
go-ethereum.
Ethereum's Go implementation and a core piece of the ecosystem's execution infrastructure.
~/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 candidate 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
available for full-time backend, distributed systems, and blockchain engineering roles
01 / UPSTREAM WORK
Open source, in the open.
Repositories I have contributed to. The pull-request links show my GitHub activity in each codebase as new work appears.
ARBITRUM / LAYER 2
upstream repository
Nitro.
The Arbitrum Nitro node and rollup codebase powering Layer 2 execution.
MORE REPOSITORIES / CONTINUED WORK
Across contracts, documentation, and Bitcoin infrastructure.02
Experience
Industry and academic roles, most recent first.
-
Sep 2025 — Present
Graduate Researcher — Blockchain & Distributed Systems University of Alberta
- 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.
-
Jan 2024 — Aug 2025
Senior Software Engineer TAPSI
- 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.
-
Jun 2023 - Mar 2025
Research Assistant — ECT Lab Amirkabir University of Technology
- 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.
-
Jun 2022 — Dec 2023
Software Engineer Bale Messenger
- 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.
-
Early career
Co-founder / Backend Engineer Bluprint
- 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.
03
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.
Request full manuscriptLayer 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.
Bifrost repository →04
Selected projects
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.
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.
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.
github.com/Amirhosein/Bifrost →05
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
06
Education & teaching
Sep 2025 — Present · thesis defence pending
MSc candidate, 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.
07
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.
- github.com/Amirhosein
- linkedin.com/in/amirhossein-iravanimanesh
- Edmonton, Alberta, Canada