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Principal Software Engineer

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We are Toco, a company driven by a passion to combat climate change by revolutionising archaic aspects of the global financial system. Our mission is to create a new era of environmental consciousness and action through the introduction of Tocos, a groundbreaking carbon currency. Tocos represents one tonne of carbon dioxide that has been removed from the atmosphere, giving individuals and businesses a tangible way to offset their carbon footprint and contribute to a sustainable future.

At Toco, we believe that traditional political and economic structures have fallen short in addressing the urgent climate crisis. Our innovative approach breaks free from the limitations of the past and empowers people to take climate action into their own hands. By uniting as a civil community, we can redefine the nature of money, challenge conventions, and lead the way where others have failed.

Our digital currency is constructed to ensure transparency, security, and scalability for our users. Through a user-friendly digital platform, individuals can easily convert their earnings into Tocos, transforming their economic wealth into a powerful store of environmental value. This not only accelerates carbon reduction efforts but also creates a vibrant marketplace where carbon assets can be exchanged, valued, and invested in, all while driving positive environmental impact.

With Tocos, we aim to disrupt the status quo, increase demand for carbon reduction, and facilitate a seamless transition towards a sustainable economy. By embracing Tocos, individuals, organisations, and businesses can actively participate in the fight against climate change, unlocking new opportunities for environmental wealth while creating a better future for all.

Join us in this exciting journey as we revolutionise finance and empower global citizens to make a real difference. Together, we can forge a path towards a greener, more sustainable world.

To find out more about Toco, you can watch this video.


Our tech culture

The culture is built around transparency, trust and extreme candour. Our way of working embraces “work-from-anywhere” and responsible leave (i.e. be responsible and take as much leave as you need) whilst encouraging people to have fun and extract meaning from their work; being aligned to the purpose of the company is extremely important to us.

We are a product led company with cross functional teams. From an engineering perspective we want our engineers to be full stack and supported by a platform engineering team to optimise their developer experience and productivity. Lots of trust is extended to engineers to let them grow, experiment, be creative, make mistakes and learn from these. We prefer small teams and aim to keep a very high bar when hiring engineers; we expect engineers both senior and junior to be deep thinkers, adept problem solvers, customer focused, investment minded and know how and when to take a pragmatic vs purist approach.


Position overview

We are in search of a highly capable and motivated Senior Software Engineer to join our team. In this role, you will be tasked with ultimately developing our product which includes collaborating with other engineers, product owners, designers and data engineers to design, engineer and support the product. The platform engineering team will help provide tooling and support to give you leverage in order to maximise developer productivity and system stability.

This remote role will report directly to the Principal Software Engineer. Candidates should ideally be located within a 4-hour range of Central European Time, though we are flexible for the right candidate. We welcome candidates with experience in cloud-based modern technology stacks, an affinity for open-source, and a passion for combating climate change through innovative technology.



  • Software development: Participate in the design, development, implementation, documentation and support of complex software systems.
  • Collaboration: Work closely with other team members and departments, such as product owners, to meet the company’s goals and client needs.
  • Code review: Perform code reviews and provide critical suggestions for fixes and improvements.
  • Problem solving: Develop solutions for client-centric problems by collaborating with product teams and understanding business requirements.
  • Communication: Relay complex information to technical and non-technical stakeholders.
  • Mentorship: Support the development and learning of junior team members through sharing of knowledge and best practices.
  • Innovation: Stay updated with relevant emerging technologies and incorporate this knowledge into your work.
  • Hiring: Help with running interviews and assess technical tasks in order to make decisions about hiring teams.
  • Ensuring quality in all aspects of engineering including solution design, code quality, testing quality, performance, monitoring, operations, etc.
  • Research and development: Help in researching and piloting new technologies and techniques.

Skills and qualifications


  • 4 year degree or higher in computer science or related field
  • 5+ years experience
  • Experience in a fast-paced [ideally startup] environment.
  • Extensive experience in software engineering with demonstrated knowledge in TypeScript, Rust, JVM languages, Python, and other relevant web technologies.
  • Expertise in using AWS preferred, alternatively deep experience with GCP or Azure
  • Experience with React or NextJS
  • Knowledge of MongoDB, or other document stores, and relational databases such as Postgres.


  • Familiarity with Polkadot and Substrate for blockchain development, and a broad understanding of blockchain technologies.
  • A solid understanding of event-driven architectures, distributed systems, and parallel computing frameworks. Familiarity with Kafka, Spark, Flink or similar tools would be advantageous.
  • Familiarity with Kubernetes.



The process will include:

  1. Interview with CTO
  2. Technical interview with senior engineers
  3. Take home case study assignment
  4. Review of case study discussion
  5. Final interview with other founders including CEO
  6. Offer

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