Looking for a job

Cosmas Ken

@cosmasken

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Software engineer specializing in Rust and TypeScript for blockchain and payments.

Kenya

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What I'm looking for

I seek engineering roles building secure blockchain payment systems, with collaborative teams, technical mentorship, and opportunities to drive production security and scalability.

I am a software engineer focused on Rust and TypeScript, with deep experience building blockchain-based payment systems, smart contracts, and secure wallet architectures. I have delivered production solutions integrating Bitcoin, Ethereum, and enterprise cryptography to enable cross-border payroll and hospitality payments.

I have held full-stack roles where I designed frontend interfaces with Vue.js and React, integrated Phoenix LiveView for real-time features, and implemented backend APIs and smart contract audits. My work reduced load times, improved auditability, and strengthened transaction security through standards like BIP-39, ECDSA, and OWASP practices.

I collaborate closely with clients and cross-functional teams to tailor solutions for remote and international contractors, prototype zero-knowledge modules, and mentor teams on secure payment workflows. I pursue continuous learning in cloud-native and blockchain ecosystems to deliver robust, production-ready systems.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Uber AI Solutions

Jan 2025 - Present (1 year)

Developing frontend applications using Angular and Vue.js while contributing to full-stack features and tooling; driving UI improvements and component development to support AI product workflows.

Angular Vue.Js TypeScript Frontend Development Component Design CLI Tools

Full-Stack Developer

Bitpochi

Nov 2023 - Dec 2024 (1 year 1 month)

Designed and deployed a blockchain-based payroll system using Rust and Ethereum, architected smart contracts for automated payroll execution, and integrated Bitcoin payment gateways with enterprise-grade cryptographic security.

Rust Solidity Ethereum Bitcoin Smart Contracts Cryptography EVM

Software Developer

Value Chain Factory

May 2023 - Sep 2023 (4 months)

Built and maintained Vue.js user interfaces for a government payment platform, modernized legacy UI components to improve load times by 30%, and integrated Phoenix LiveView real-time features into frontend workflows.

Vue.Js Phoenix LiveView Elixir Cypress Accessibility

Software Engineer

African Blockchain Center

Aug 2022 - May 2023 (9 months)

Developed frontend modules and non-custodial wallet features for a blockchain hospitality platform, audited smart contracts, and implemented wallet security (BIP-39, HD keys) and API gateways for secure transactions.

Web3.js Smart Contract Auditing BIP 39 HD Wallets API Design HDWallet

Software Developer

KCB Bank Group

Mar 2019 - Mar 2021 (2 years)

Contributed to bank software projects, delivering backend and frontend features for internal systems and supporting integrations across teams to improve banking workflows.

Backend Development Frontend Development Software Delivery Team Collaboration

Summer Intern

iLabAfrica

Jun 2016 - Aug 2016 (2 months)

Supported research and development projects during a summer internship, assisting with prototype development and technical experimentation in applied computing projects.

Prototyping Experimentation Collaboration

Education

Degrees, certifications, and relevant coursework

Strathmore University

Master's degree, Computer Science

2022 - 2024

Activities and societies: Encode Club; Encode x Aptos Move Bootcamp (July 2024 - September 2024)

Master's degree in Computer Science at Strathmore University completed between March 2022 and December 2024, focusing on advanced software engineering topics.