At a Glance
- Tasks: Drive tokenization features and scale digital asset architecture in a dynamic environment.
- Company: Bullish, a leading global digital asset platform focused on security and compliance.
- Benefits: Competitive salary, diverse culture, and opportunities for professional growth.
- Other info: Be part of a fast-evolving, globally-diverse community committed to integrity and excellence.
- Why this job: Join a team shaping the future of digital assets with cutting-edge technology.
- Qualifications: 5+ years in software engineering, expertise in smart contracts, and strong TypeScript skills.
The predicted salary is between 80000 - 100000 £ per year.
About Bullish
Bullish is an institutionally focused global digital asset platform that provides market infrastructure and information services. These include:
- Bullish Exchange – a regulated and institutionally focused digital assets spot and derivatives exchange, integrating a high-performance central limit order book matching engine with automated market making to provide deep and predictable liquidity.
- CoinDesk Indices – a collection of tradable proprietary and single-asset benchmarks and indices that track the performance of digital assets for global institutions in the digital assets and traditional finance industries.
- CoinDesk Data – a broad suite of digital assets market data and analytics, providing real-time insights into prices, trends, and market dynamics.
- CoinDesk Insights – a digital asset media and events provider and operator of Coindesk.com, a digital media platform that covers news and insights about digital assets, the underlying markets, policy, and blockchain technology.
Reports To: Director, Engineering
Engineering Organization & Culture
At Bullish, we are engineering the institutional standard for the digital asset industry. Our mission is to build a platform centered on security and compliance, requiring a commitment to technical excellence that extends beyond delivering code. As a global organization, we set a high bar for those driven to do their best work alongside experienced, deeply specialized peers.
Engineers here treat development as a craft and own the outcome from concept to deployment. Our teams bring structure to ambiguity and shape the frameworks that support a global organization. We refuse to compromise on quality and seek problem solvers who thrive on complex technical challenges with real market consequences.
The Team: Custody Engineering
The Custody Engineering team builds the systems that safeguard user assets, architecting secure and compliant infrastructure for the full lifecycle of funds. Our technical scope spans blockchain development, smart contracts, oracles, and the full-stack systems that power them. We operate with a high degree of autonomy and ownership over core infrastructure, connecting blockchain technology with institutional‑grade stability.
With the core architecture in place, the team is now heavily focused on advancing the tokenization strategy. You will scale those systems and ship on-chain features whose impact is visible to the business directly.
What You'll Do
- Drive tokenization features from concept through deployment, scaling the digital asset architecture against established industry standards.
- Own the technical execution for the digital asset lifecycle, including issuance, controlled transfer, and on-chain verification.
- Lead the design, implementation, and testing of the smart contracts that hold customer assets, and coordinate the audit process end‑to‑end.
- Build and maintain the off‑chain integration layer, with secure, reliable communication between the blockchain and internal systems.
- Partner with product and operational compliance teams to translate cryptographic and security requirements into engineering solutions.
What You'll Bring
- 5+ years of software engineering experience delivering complex systems in production.
- Expert‑level fluency in secure public chain smart contract development, such as Solidity and the Ethereum Virtual Machine (EVM), with command of industry‑standard security frameworks and libraries such as OpenZeppelin.
- Strong command of TypeScript for backend development, API integration, and building off‑chain indexing services.
- Hands‑on experience with modern Web3 development tooling such as Foundry or Hardhat, and integration libraries such as Viem or Ethers.js.
- Expert‑level knowledge of smart contract token standards and the surrounding ecosystem’s intricacies.
- A paranoid security mindset, with proven expertise preventing and mitigating common smart contract vulnerability patterns (re‑entrancy, oracle manipulation, access control flaws) and managing the audit process.
- The ability to communicate protocol logic and security trade‑offs to both technical and non‑technical stakeholders across global teams.
- Degree in Computer Science, Engineering, or a related technical field (or equivalent professional experience).
Nice to Haves
- Engineering experience within the finance or high‑security sector.
- Familiarity with SVM/Solana or Daml/Canton smart contract and application development.
- Familiarity with C++ to interface with broader platform systems.
- Fluency in modern key management paradigms (e.g., MPC, HSM) and applied cryptography specific to digital assets.
- Experience with advanced wallet architectures such as Account Abstraction (ERC‑4337) or multi‑signature frameworks.
Bullish is proud to be an equal opportunity employer. We are fast evolving and striving towards being a globally‑diverse community. With integrity at our core, our success is driven by a talented team of individuals and the different perspectives they are encouraged to bring to work every day.
Senior Engineer, Custody Engineering (Tokenization) employer: Bullish
Bullish is an exceptional employer that fosters a dynamic and innovative work culture in the heart of Greater London. With a strong emphasis on employee growth, we offer opportunities to shape the design landscape of trading platforms while leveraging cutting-edge AI tools. Join us to make a meaningful impact in the digital asset market and be part of a team that values creativity and collaboration.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Engineer, Custody Engineering (Tokenization)
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those related to tokenization and smart contracts. This gives potential employers a taste of what you can do beyond your CV.
✨Tip Number 3
Prepare for interviews by brushing up on common technical questions and scenarios specific to custody engineering. Practice explaining complex concepts in simple terms, as you'll need to communicate effectively with both techies and non-techies.
✨Tip Number 4
Don't forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you're genuinely interested in joining our team at Bullish.
We think you need these skills to ace Senior Engineer, Custody Engineering (Tokenization)
Some tips for your application 🫡
Tailor Your Application:Make sure to customise your CV and cover letter for the Senior Engineer role. Highlight your experience with smart contracts and tokenization, as well as any relevant projects that showcase your skills in secure public chain development.
Showcase Your Technical Skills:We want to see your technical prowess! Include specific examples of your work with Solidity, TypeScript, and any modern Web3 tools you've used. Don't forget to mention your experience with security frameworks and how you've tackled vulnerabilities in the past.
Communicate Clearly:When writing your application, keep it clear and concise. We appreciate straightforward communication, especially when explaining complex technical concepts. Remember, you might be talking to both techies and non-techies!
Apply Through Our Website:For the best chance of getting noticed, apply directly through our website. It helps us keep track of applications and ensures you’re considered for the role. Plus, we love seeing candidates who take that extra step!
How to prepare for a job interview at Bullish
✨Know Your Tech Inside Out
Make sure you’re well-versed in secure public chain smart contract development, especially with Solidity and the Ethereum Virtual Machine. Brush up on industry-standard security frameworks like OpenZeppelin, as you'll need to demonstrate your expertise in these areas during the interview.
✨Showcase Your Problem-Solving Skills
Prepare to discuss complex technical challenges you've faced in previous roles. Be ready to explain how you approached these problems, the solutions you implemented, and the outcomes. This will highlight your ability to thrive in a high-stakes environment like Bullish.
✨Communicate Clearly
You’ll need to convey technical concepts to both technical and non-technical stakeholders. Practice explaining protocol logic and security trade-offs in simple terms. This will show that you can bridge the gap between engineering and business needs effectively.
✨Understand the Business Impact
Familiarise yourself with how tokenization features impact the business directly. Be prepared to discuss how your work contributes to safeguarding user assets and enhancing compliance. This shows that you’re not just a coder but someone who understands the bigger picture.
