Back-End Engineer, Fraud

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

Job summary

A leading blockchain technology firm is seeking a Back-End Engineer to enhance fraud prevention systems. You will participate in technical discussions, advocate best practices, and build scalable systems. Ideal candidates have experience with JVM languages and are customer-focused. The role offers a competitive salary, equity, and a hybrid work culture in Central London.

Benefits

Full-time salary based on experience

Hybrid model working from home & office

Work from Anywhere Policy

Budgets for learning & professional development

Unlimited vacation policy

Apple equipment

Flexible work culture

Qualifications

• 3-5+ years experience in building production-ready distributed backend systems.
• Experience in JVM-based languages such as Java, Kotlin, Scala.
• Strong technical documentation and effective monitoring skills.

Responsibilities

• Advance fraud prevention mechanisms with data science team.
• Optimize existing systems for scalability and performance.
• Ensure security measures through advanced encryption.

Skills

Programming languages

Building scalable backend systems

Microservices architecture

Test coverage

Tools

Kotlin

PostgreSQL

Kafka

Redis

Job description

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time.

We are looking for software engineers with a proven track record in building scalable, reliable and performant systems for Fraud. You will play a critical role in building financial and crypto-native products, services and APIs. As a Back-End Engineer you will be participating in technical discussions and making a positive impact on the team's development by advocating the best engineering practices.

WHAT YOU WILL DO

• You will be part of the Brokerage - Fraud team who actively enhance blockchain.com’s fraud prevention.
• Fraud engineers build fraud prevention mechanisms in conjunction with our data science team for our payment rails by using our internal services together with our partners SardineAI and Sift
• Work with our risk, compliance teams including our providers to resolve customer issues
• Advocate best practices, code quality, test coverage and drive technical discussions
• Optimise existing systems for scalability, extensibility and performance whilst building out reusable, modular code for use across Blockchain’s products
• Ensure security is at the forefront of everything you do, employing advanced encryption schemes to secure user and company data
• Work within interdisciplinary teams to continually deliver the highest quality software to our users

WHAT YOU WILL NEED

• You know at least one programming language in depth
• You have at least 3 - 5+ years experience building and shipping highly-available, fault tolerant, production ready distributed backend systems
• You have experience in any JVM based languages (such as Java, Kotlin, Scala) and are confident in your ability to build, debug and ship microservices
• You are customer focused and continuously suggest how the backend can provide the best Customer Experience
• You pride yourself on consistent high levels of test coverage, strong technical documentation and effective monitoring
• We use Kotlin, PostgreSQL, Kafka, Redis, Datadog, Amplitude, Grafana, BigQuery, ApacheSpark and more
• A passion for crypto and the transformations it enables

NICE TO HAVE

• SardineAI or Sift experience
• Working with Data science and Analysts
• Understanding of fraud models and workflows

COMPENSATION & PERKS

• Full-time salary based on experience and meaningful equity in an industry-leading company
• Hybrid model working from home & our office in Central London (SoHo)
• Work from Anywhere Policy - up to 20 days to work remotely
• ClassPass
• Budgets for learning & professional development
• Unlimited vacation policy; work hard and take time when you need it
• Apple equipment
• The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field
• Flexible work culture

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 recruitment purposes, including managing interviews and evaluations for applicants. Such processing is necessary for the legitimate interests pursued by the Controller in recruitment activities. Your data may be shared with Greenhouse Software, Inc., a cloud services provider engaged to help manage recruitment. Data transfers to the United States may occur; appropriate safeguards are in place under standard contractual clauses. You have rights under GDPR regarding access, rectification, erasure, and data portability, and may lodge a complaint with an EU supervisory authority.