CITA LABS
Senior Database Engineer
- Compensation
- Not disclosed
- Location
- Singapore
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 7+ years
- Category
- Devops
- Posted
Skills
Must have
- 7+ years of professional experience in database engineering, backend infrastructure, DBA, or related roles.
- Strong production experience with relational databases, particularly PostgreSQL and/or MySQL.
- Deep understanding of SQL optimization, indexing strategies, query execution plans, and database internals.
- Strong knowledge of ACID transactions, isolation levels, MVCC, locking, deadlocks, and concurrency control.
- Experience designing databases for high-throughput transactional systems.
- Hands-on experience with replication, high availability, failover, backup, and disaster recovery.
- Experience designing and executing large-scale database migrations with minimal downtime.
- Strong understanding of database monitoring and production troubleshooting.
- Experience operating databases in cloud environments such as AWS, GCP, or Azure.
- Familiarity with infrastructure automation and modern DevOps practices.
- Strong understanding of database security and access-control principles.
- Ability to investigate complex production issues independently.
- Strong communication skills and ability to collaborate with distributed engineering teams.
Nice to have
- Cryptocurrency exchanges
- Blockchain infrastructure
- FinTech or payment platforms
- Banking or financial systems
- Trading platforms
- Wallet or custody systems
- High-frequency or high-volume transactional systems
- Financial ledger systems
Full description
Company Overview & Vision
Founded in Singapore in April 2026, CITA Lab is a dynamic software development startup dedicated to building high-quality, custom blockchain-related products tailored specifically to our customers' requirements. Our diverse product lineup includes centralized/decentralized cryptocurrency exchange solutions, secure crypto wallets, smart contracts, dApps, and more. We turn complex blockchain capabilities into seamless, secure, and intuitive user experiences for clients worldwide.
Responsibilities
- Design and maintain scalable database architectures for crypto exchanges, wallets, payment systems, and other financial applications.
- Design highly available and fault-tolerant database infrastructure suitable for production-critical systems.
- Optimize complex SQL queries, indexes, schemas, and execution plans for high-volume workloads.
- Diagnose and resolve database performance bottlenecks in production environments.
- Design reliable data models for financial transactions, balances, ledgers, deposits, withdrawals, and blockchain-related data.
- Ensure strong transactional integrity and consistency across distributed systems.
- Develop strategies for replication, partitioning, sharding, clustering, and horizontal scaling.
- Design and maintain database backup, restore, disaster-recovery, and point-in-time recovery strategies.
- Implement database monitoring, alerting, capacity planning, and performance analysis.
- Work closely with backend engineers on transaction boundaries, locking strategies, concurrency control, and efficient database access patterns.
- Design safe database migration and schema-evolution strategies with minimal or zero production downtime.
- Identify and resolve deadlocks, lock contention, replication lag, slow queries, connection exhaustion, and other production database issues.
- Participate in architecture reviews and provide guidance on database technology selection.
- Establish database security best practices, including access control, encryption, auditing, secrets management, and least-privilege policies.
- Participate in incident response, root-cause analysis, and post-incident improvements.
- Review database-related code and mentor engineers on database design and performance best practices.
What you'll do
As a Senior Database Engineer at CITA Lab, you will be responsible for designing and maintaining high-performance, highly available, and reliable database systems supporting blockchain, cryptocurrency, and financial applications.