Ranju GC

रञ्जू जि.सी.  ·  Research Engineer

I build systems that have to be trusted: threshold-signature bridges that move value between blockchains, and speech models for a language the internet mostly skipped.

Pokhara, Nepal ranjugc00@gmail.com github.com/gcranju Google Scholar

Three of five agree. The signature holds.

No single party holds the key. Take a share away and see what the bridge does.

नेपाली भाषामा बोल्न सक्ने प्रणाली Tacotron2 · 80 mel bins · 22.05 kHz · illustrative

Research

Two lines of work, one concern: building things people are asked to rely on, and being able to say why the reliance is warranted.

secp256k1 · ed25519

Applied cryptography and secure distributed systems

Multi-party computation and threshold signatures, cross-chain bridge and protocol design, and the integrity of decentralized systems once they are carrying real value.

WER · MOS · mel

Speech and language for low-resource languages

Text-to-speech for Nepali, dataset curation and public release, and evaluation of generative speech that goes past the loss curve to what a listener actually hears.

Publications

  1. 2024

    Optimizing Nepali PDF Extraction: A Comparative Study of Parser and OCR Technologies

    Paudel, P., Khadka, S., G.C., R., & Shah, R.

    Preprint · arXiv:2407.04577

    doi.org/10.48550/arXiv.2407.04577

  2. 2023

    Nepali Text-to-Speech Synthesis using Tacotron2 for Melspectrogram Generation

    Khadka, S., G.C., R., Paudel, P., Shah, R., & Joshi, B.

    SIGUL 2023 · ELRA/ISCA Special Interest Group on Under-resourced Languages, satellite workshop of Interspeech 2023, pp. 73–77. Peer-reviewed.

    doi.org/10.21437/SIGUL.2023-16

  3. 2022

    Decentralized Book Publishing Platform using Blockchain and IPFS: An NFT-based Solution to Royalty Theft

    Paudel, P., G.C., R., Shah, R., & Khadka, S.

    ICET 2022 · International Conference on Engineering & Technology

Systems

Showing

Cross-chain bridge with an MPC threshold signer

Replaces trusted relayer infrastructure with an M-of-N verifier set and a multi-party threshold signer, deriving deposit addresses and producing signatures across both secp256k1 and ed25519 chains. The quorum at the top of this page is this system, in miniature.

MPC and threshold signaturessecp256k1ed25519Go

Cross-chain intent relay

The cloud-deployed relay behind the bridge. It processes user transactions across heterogeneous chains, with modular per-chain deployments and infrastructure provisioned as code.

AWS LambdaSQS and SNSDynamoDBTerraformDocker

Sodax: cross-chain DeFi protocol architecture

Smart-contract architecture for a production hub-and-spoke money market and cross-chain swaps, with solver and executor services that route and settle user intents through the bridge above.

SolidityRustEVMNEARStellar

Multisig coordination tooling

A Go backend that coordinates multisig transaction proposals across chains, with wallet applications for Stellar and NEAR and a CLI for invoking contract methods on any of them. On-chain safety mechanisms including circuit breakers.

Gomultisigcontract auditing

Shruti: a Nepali audiobook reader

An end-to-end mobile application built on the Tacotron2 Nepali TTS system, carrying the research through to something a reader can actually listen to. The accompanying dataset is publicly released on OpenSLR. Training-data scarcity, and what it does to intelligibility, is characterized with word error rate, spectrogram inspection, and crowd-sourced mean opinion scores.

PyTorchTacotron2HiFi-GANrepository

Experience

  • 2022 — now

    Research Engineer, Venture23

    Applied cryptography and secure cross-chain systems

    Bridge and threshold-signer design, cross-chain relay infrastructure, multisig coordination services, and smart contracts in Solidity and Rust. Also probabilistic modelling of large-scale transactional data, to characterize how users actually respond to incentive mechanisms.

  • 2022 — 2023

    Undergraduate Researcher, CARD

    Center for Applied Research and Development, Institute of Engineering, Pulchowk Campus · Advisor: Dr. Basanta Joshi

    Led a project on Nepali text-to-speech, a setting with very little prior public work. Curated and released a Nepali TTS dataset on OpenSLR, designed the evaluation protocol, and ran comparative experiments across TTS architectures.

  • 2021 — 2022

    Data Science Intern, Deep Analytics

    Mentor: Hari Khanal, PhD

    Air Quality Index prediction on real environmental sensor data for a Kathmandu-valley study, comparing and tuning Random Forest and Logistic Regression classifiers with attention to feature importance and temporal generalization.

Education

  • 2018 — 2023

    Bachelor of Computer Engineering

    Pulchowk Campus, Tribhuvan University, Lalitpur · 79.03%

    Excellence Scholarship on merit across all four years.

  • 2016 — 2018

    Higher Secondary, Science

    Amarsingh Model College, Pokhara · 3.71 / 4.00

Teaching

Mentoring

Mentor with Women Leaders in Technology since 2023, working with more than 50 fellows across three cohorts on AI and decentralized systems, and on how a technical career gets built. Technical sessions and workshops for student groups at PDSC, LOCUS, and STEM Sisters.

Community

Event Manager at Girls in Tech Nepal from 2020 to 2023, running more than 50 community events. PR Manager for the Hult Prize at IOE Pulchowk, reaching 12 colleges and 600 participants. Monthly technical-awareness sessions for secondary-school girls with Small Sisters, Pokhara.

Also

Awards

  • Hackathon for Health & Tech, winner2023
  • GritFeat AI Health Hackathon, 1st runner-up2023
  • Hack-A-Week, winner, fintech2022
  • Nepal AI School, full scholarship2021

Toolkit

  • LanguagesPython · Go · Rust · TS · Solidity
  • Machine learningPyTorch · scikit-learn
  • InfrastructureAWS · Terraform · Docker
  • DataPostgreSQL · MongoDB

Languages

  • Nepalinative
  • EnglishIELTS 7.5

R 8.0 · L 7.0 · S 7.0 · W 7.0