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Who we are

Zerosum is an innovative software consultancy based in Johannesburg, South Africa. Our focus has always been on delivering value to our clients by engineering elegant, scalable and efficient solutions through the use of leading technologies. Our passion for learning and problem solving forms the foundation of our culture.

We provide comprehensive services ranging from ideation and deliberation to development and maintenance of software systems. We are capable of building end-to-end systems, including mobile apps, web apps and backend systems. Beyond typical software applications, we have deep experience in blockchain technologies, big data, IOT, quantitative finance, and serverless Cloud architectures.

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Focus Areas

R&D. Engineering. Software.

We are excited about providing unique solutions to complex problems found in businesses, markets and core systems. With experience in both financial and engineering fields as well as a deep understanding of new technologies, we are focused on merging contemporary concepts with established industries.


Brainstorm, refine and assess the viability of your ideas.

Mobile & Web

Development for iOS, Android and the modern Web.


Understand this intriguing technology and evaluate its applicability to your business.

Cloud Computing

Architect, develop and deploy your IT infrastructure to the Cloud.


Stream, process, visualise and analyse your "things" data.


We have a team of Financial Mathematicians who can bring your financial models to life.

Our Work Flow

With our customer centric approach we understand that no two clients are the same and will cater to your unique problems and requirements. However, we like to follow a high level structure when bringing your product, service or idea to life.

1: Ideation
We will setup an initial consultation to attain an understanding of the problem you are trying to solve.
2: Spec and Initial Proposal
After our initial meeting and brainstorming sessions we will present you with a rough timeline, an estimated price and our proposed solution.
3: Design, Develop and Deploy
We will set up project workflows between your team and our engineers, ensuring all relevant stakeholders are included and that effective communication channels are established. Thereafter we build, test and deploy your project while communicating with your team at every step of the way.
4: Evolve and Maintain
Post deployment phase we offer dedicated developers to maintain and evolve your product depending on your business goals and needs.

Tech Stack

  • Technologies
  • Skills


  • National Tariffs
  • Utility Billing Engine
  • Smart Metering
  • IOT comms
  • Big Data
  • Reporting
  • Dashboards
  • Forecasting


  • Cryptography
  • Smart Contract
  • Distributed Ledger Technologies
  • Private & Public Blockchains


  • Serverless
  • Storage
  • Data Pipeline
  • Pub/Sub
  • Analytics
  • Networking & Content Delivery
  • Web Hosting
  • Databases

Financial Methods

  • Numerical Methods
  • Stochastic Calculus
  • Monte Carlo
  • Finite Element Analysis
  • Derivative Pricing
  • Risk Management


Research and Development Areas

Introducing RandX

Public blockchains bring revolutionary properties, such as decentralised consensus and immutability to reality. However, they do not scale well and for good reasons. Certain trade-offs are made in scalability to ensure network security and to maintain a decentralised design.

Solving scalability is a necessary measure for adoption. There are many interesting projects in this space such as Bitcoin's Lightning Network and Ethereum's Raiden Network. We decided to explore a solution to second layer scaling by developing RandX, a digital financial platform built using smart contracts on the Ethereum Public Network.

RandX is an ongoing research project to bring fast and low cost transactions to the Ethereum space in a user friendly digital wallet while maintaining the underlying decentralised and trustless nature of the blockchain. Visit if you are interested in exploring this technology and its potential benefits for you and your company.