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Back-end developer
London, United Kingdom

Job Title

Back-end developer

Job Description

MAIN PURPOSE AND SCOPE OF THE JOB Develop and maintain Qadre’s blockchain framework. This will include. Requirements gathering and design of new features. Building high performance, distributed systems using Python 3.6/Asyncio Ensure code is tested and proven correct using Test Driven Development Write and maintain operational documentation and tutorials Plan and Execute strategies for Cloud based deployments Build internal tooling for the deployment and analysis of deployed technologies. Assist other developers building solutions on the framework.

REMUNERATION AND ROLE DETAIL Full-time role Based in central London Starting immediately £30,000-65,000 (variable on experience and skill) Bonuses (based on company performance) Pension scheme Emphasis on personal development within role 25 days holiday (and working from home policy over 2 weeks of late December), plus bank holidays Regular Qadre team events e.g. archery, boxing, dinners, knowledge-sharing; Qadre office prosecco and soft drinks fridge, and fruit in office; WeWork offices (Chancery Lane) - free beer, cider, tea, coffee, biscuits, events, table-tennis, table-football. Open for discussions about health insurance, equity, and international travel or relocation.


  • No telecommuting
  • No Agencies Please


MSc or BSc in Computer Science or related discipline/experience. Well versed in writing clean and idiomatic code with an emphasis on testing, and maintainability. In-depth knowledge of: Python 3.6 and asyncio Unix Environments (you should be able to operate from the terminal) TDD (py.test, tox) ZMQ, WebSockets, HTTP 1.1 and 2. TCP/UDP Socket Programming with I/O polling SQL (Preference on Sqlite3 and PostgreSQL, beyond basic SQL) Git (You should be able to resolve conflicts without a GUI) Symmetric and Asymmetric Cryptography, Block Ciphers Docker Ideal additional knowledge: Deployment tooling (SaltStack) Cloud Computing (AWS, DigitalOcean, Google Compute Engine) Distributed Networking Computer Consensus Algorithms Containerisation and Deployment.

About the Company

COMPANY Qadre Limited is a fast-scaling blockchain company, using in-house technology to enable trust online. The technology was developed from scratch to avoid the architectural mistakes of cryptocurrency and allow for the engineering of new products for the public and private sectors. The team has worked on some of the earliest and most innovative blockchain projects to date, and is using this expertise to build enterprise-grade solutions that establish identity, security, and autonomy online. The technical work at Qadre is highly innovative and therefore we look for candidates with not just the greatest technical talent, but also a passion for solving problems and addressing the endemic inefficiencies, opaqueness, and the absence of trust that exist on a global scale.

Company policies: 1. Be inquisitive – always look to learn, grow, and challenge - and always ask questions and make suggestions; 2. No excuses – don’t try to mask your mistakes and failures – embrace them and learn from them; 3. Treat others with respect – understand that a strong team is a diverse one; 4. Constantly re-evaluate your role – what is the wider scope you’re working in –what is the wider goal you’re trying to reach, and how do you achieve that; 5. Seek out smart – try to surround yourself with people who know things you don’t – whether in the existing team, in mentors, or through new hires; 6. Help out and be nice – whether that’s up-skilling a colleague before their big presentation, or just washing up the glasses after team drinks: always be looking to help out others; 7. Enjoy your job – you’ll be here a lot, you’ll be the one dictating your commitment – if you’re not having fun, then find the solution: are you no longer happy here (fail fast) or can we pivot internally to fulfill your role.

Contact Info

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