Software Engineer (Kotlin), Institutional

Prudence Holdings; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading global crypto company in London is seeking a Software Engineer to develop secure and scalable backend services using Kotlin. The ideal candidate will work with cross-functional teams to deliver robust APIs for trading and wealth management applications. This position offers a hybrid work model and numerous perks, including unlimited vacation and professional development budgets.

Benefits

Full-time salary based on experience

Equity in the company

ClassPass

Budgets for learning & professional development

Unlimited vacation policy

Qualifications

• Strong hands-on experience with Kotlin in backend development.
• Proven expertise building scalable APIs and microservices.
• Knowledge of messaging and streaming technologies.

Responsibilities

• Design and implement scalable, secure backend services.
• Build robust APIs and microservices for trading applications.
• Collaborate with teams to deliver intuitive experiences.

Skills

Kotlin

API development

Microservices

Fintech knowledge

Cloud deployments

Job description

Software Engineer (Kotlin), Institutional

London

Blockchain.com is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Since its inception in 2011, Blockchain.com has earned the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.

Blockchain is the world's leading software platform for digital assets. Founded in 2011, we provide the world’s largest and most trusted production blockchain platform, powering more than 75 million wallets. Together with our platform of liquidity and execution services, we share the passion to build an open, accessible and fair financial future, one piece of software at a time.

We are looking to hire a Software Engineer to join our Institutional team in our London office. Blockchain.com is a high-performance culture marked by fearlessness and hyper productivity. You are a hardworking team player with a desire to learn and grow with us, someone who can work harder, faster, and smarter to deliver tangible results and process improvements.

WHAT YOU WILL DO

• Design and implement scalable, secure, and high-performance backend services in Java/Kotlin that power client-facing applications for trading, custody, and wealth management.
• Build robust APIs and microservices to support advanced dashboards, analytics tools, and mobile experiences.
• Collaborate closely with front-end engineers, product managers, and designers to deliver seamless, intuitive experiences for sophisticated investors.
• Architect solutions for portfolio management, trade execution, settlement, reporting, and analytics tailored to institutional and private clients.
• Optimize backend systems for low latency, high throughput, and fault tolerance.
• Integrate security best practices and advanced encryption to safeguard sensitive financial data.
• Continuously improve backend performance, reliability, and development workflows.

WHAT YOU WILL NEED

• Strong hands-on experience with Kotlin in backend and distributed systems development.
• Proven expertise building scalable APIs, microservices, and backend platforms for complex financial or data-intensive applications.
• Familiarity with cloud deployments, and service-oriented architectures.
• Knowledge of messaging and streaming technologies (NATS, Kafka, or similar).
• Solid understanding of algorithms, data structures, databases, and distributed systems.
• Knowledge of ledger systems is a strong plus.
• Passion for solving challenging technical and financial problems with clean, maintainable code.
• Commitment to quality-driven engineering, with a strong focus on testing (unit, integration, performance, and failure recovery).
• Experience in fintech, trading, or wealth management platforms is a strong advantage.

COMPENSATION & PERKS

• Full-time salary based on experience and meaningful equity in an industry-leading company
• This is a hybrid role based in our London office, with a mandatory in-office presence three days per week.
• Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year.
• ClassPass
• Budgets for learning & professional development
• Unlimited vacation policy; work hard and take time when you need it
• The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field

#LI-Hybrid

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time.

Your personal data will be processed for the purposes of managing recruitment and hiring activities, including setting up and conducting interviews and tests, evaluating and assessing results, and as otherwise needed in the recruitment and hiring processes. Such processing is lawful under applicable data protection regulations as necessary for legitimate interests pursued by the Controller. Your data may be shared with third-party service providers involved in the recruitment process. Data transfers and retention are governed by applicable data protection laws and the Controller’s privacy notices.