Coreblocks

Go Backend Engineer (Fintech)

📍 Work setup: Remote | Hybrid | 

🕓 Schedule: Full-time | 

💼 Experience: 6+ years

About the Company:
This is a Neobank project focused on delivering innovative financial products in both fiat money and cryptocurrency domains. You’ll be part of a team building modern fintech solutions that combine traditional banking with digital assets.

Join a fast-growing fintech startup where you’ll have a direct impact on system architecture, scalability, and performance for platforms handling large volumes of data.

Key Responsibilities:

• Design and develop high-load microservices
• Build data pipelines and storage solutions
• Work with message queues, asynchronous tasks, data streams, and data lakes
• Write unit and integration tests
• Improve performance and optimize resource usage
• Take part in architectural discussions and decisions

• Maintain and support production systems

   

Tech Stack:

• Languages: Go (mandatory), TypeScript (nice to have)
• Databases & Storage: PostgreSQL, Redis, Kafka, ClickHouse
• Communication: gRPC, HTTP, RabbitMQ, Kafka
• Infrastructure: Docker, Kubernetes, Flux
• DevOps tools: Terraform, Helm (optional)
• Monitoring: Prometheus, Grafana, Loki

Requirements:

• 4+ years of hands-on Go development experience
• Solid knowledge of microservices architecture
• Background in DWH systems or data pipelines
• Experience with message brokers and queue systems
• Strong understanding of concurrency and goroutines
• Skills in designing and scaling distributed systems
• Ability to analyze existing code and maintain legacy solutions
• Proficiency with Git and Docker
• Experience working with PostgreSQL and Redis
• English level: B2 or higher

Nice to Have:

• Background in blockchain infrastructure
• Knowledge of JavaScript / TypeScript
• Experience with clustering and replication in distributed environments

Responsibilities:

• Drive the strategy and roadmap for debit, credit, and virtual card products.
• Launch card programs from scratch: from BIN sponsorship and Visa/Mastercard approvals to card issuance and transaction processing.
• Manage integrations with processing platforms, personalization bureaus, and settlement partners.
• Oversee the enablement of Apple Pay, Google Pay, and tokenization services.
• Ensure compliance with Visa/Mastercard standards, PCI DSS, and local regulatory requirements.
• Collaborate with engineering, operations, and compliance teams to deliver scalable solutions.
• Define product requirements and track key metrics (interchange, transaction volumes, active card usage).
• Work with payment networks and partners to optimize card economics and enhance customer experience.

What We Expect from You:

• 4+ years of experience in product management or card program management within banking or fintech.
• Proven track record of launching Visa and/or Mastercard card products.
• Strong understanding of card scheme rules, BIN sponsorship, and regulatory requirements.
• Hands-on experience with Apple Pay, Google Pay, tokenization, and card transaction flows.
• Familiarity with processing systems, card personalization, and settlement operations.
• Excellent project management and stakeholder communication skills.
• Fluency in English.

Key Responsibilities

• Gather, document, and maintain business and technical requirements for KYC, KYT, AML, and Fraud Monitoring tools.
• Analyze customer onboarding journeys and optimize verification and AML screening processes using tools like Sumsub, ComplyAdvantage, Crystal.
• Establish compliance automation rules and thresholds, including transaction limits, sanction lists, and PEP checks.
• Design and implement CRM workflows to support Compliance and Customer Support, covering ticketing, case management, and audit trails.
• Evaluate and participate in third-party provider integrations for KYC, AML, and fraud monitoring.
• Keep documentation up-to-date in Confluence, manage backlog and project progress in Jira, and ensure consistent communication across stakeholders.
• Collaborate closely with Compliance Officers to ensure system operations meet internal policies and regulatory standards (EU & UAE).

Requirements

• 3+ years of experience as a Senior Business Analyst in fintech, neobanks, or crypto/fiat payment environments.
• Hands-on experience with KYC / AML / KYT systems (e.g., Sumsub, Crystal, Chainalysis, ComplyAdvantage).
• Strong understanding of compliance workflows: onboarding, ongoing monitoring, sanctions screening, and risk management.
• Experience with CRM and back-office systems, including building logical flows, permissions, stages, and ticketing structures.
• Ability to translate complex business requirements into actionable technical tasks.
• Knowledge of transaction monitoring rules, thresholds, and best practices in regulatory frameworks (EU / VARA / FATF).
• Proficiency in documentation and modeling techniques (BPMN, UML), writing user stories, and defining acceptance criteria.
• Experience working in Agile/startup environments with cross-functional teams.
• Proficient with Jira, Confluence, Miro, Figma, Excel/Sheets.
• Strong stakeholder management, communication, and facilitation skills.
• English proficiency at Upper-Intermediate level or higher.