Web Developer

Careers > Web Developer

Who WE Are

ALT 5 Sigma is a global fintech company providing next generation blockchain powered technologies for the issuance, trading, clearing, settlement, payment and custodianship of digital instruments.

ALT 5 Sigma builds all of its products and services from the following four key principles:

  1. Safety, Security and Trust
  2. Accessibility
  3. Compliance
  4. Transparency

About the Technology

  • Ability to offer multiple digital assets (BTC, ETH, LTC, BCH, BSV etc.)
  • Support 24/7
  • Complete back-end control through customizable administration dashboard
  • Audit trades for clients
  • Automated trade confirmation email and customized monthly statements
  • Ability to place, edit, and cancel limit orders into order book via API.
  • Matching Engine – 5 million transactions per seconds.
  • Unlimited accounts per user.
  • Accept fiat deposits (USD, CAD, EUR).
  • Order types include market, limit and stop.
  • End-points supporting connections to trading interfaces, API, and related user-directed systems.
  • Integrated system to document customer KYC for on-boarding process.
  • Connect to FIX, Binary, WebSocket, REST and custom APIs.
  • Run reports, transactions, treasury.
  • Unlimited user profile.

About the Role

We are looking to hire a Web Developer to work with us remotely and on occasion collaborate in our Newmarket office to build amazing applications for our clients. If you are great in a team environment, learn new things quickly, and communicate well, we want to work with you!


  • Develop our web React/Redux web applications
  • Integrate with HTTP and WebSocket APIs
  • Test, debug, and optimize web application performance
  • Write design and technical documentation
  • Learn lots of domain-specific problems in finance and investment
  • Help our junior web developers with design and code reviews
  • Help improve our tooling, dependencies, code patterns, etc.
  • Work with QA team to ensure project meets desired objectives
  • Troubleshooting and testing sources to make sure they are vital and ensure that the content is displayed as intended


  • Minimum 5 years full stack experience
  • Minimum 5 years experience developing complex JavaScript applications
  • Minimum 3 years experience with React (+ Redux, Hooks)
  • Minimum 3 years experience with Node.js
  • Take pride in writing clean, well-documented code
  • Follow best practices whenever possible
  • Can work well as either a lead or a part of a team of strong developers


  • Join us on the ground floor and be a part of the future of finance technology in one of the fastest growing companies in the industry
  • Ability to have stock options and participate in the company’s future growth
  • Fast moving, challenging and unique business problems
  • International work environment and flat organization
  • Great career development opportunities in a growing company
  • Possibility for relocation and international transfer’s mid-career
  • Competitive salary
  • Flexible working hours, casual work attire
  • Must be located in Toronto
  • Available to work in our Newmarket office 1-2 days per week as needed

Interested candidates please send your resume to: [email protected]

    Web Developer
    Toronto, ON | Full-time | Hybrid

    Institutional grade digital assets trading and custodian services built on the foundation of security, accessibility, compliancy and transparency

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