[Hiring] Senior Software Engineer @Quidax Technologies Ltd

Role Description

We're looking for a Senior Software Engineer to join our Trading & Liquidity squad and build the systems that power the heart of Quidax. This is a hands-on engineering role for someone who enjoys solving hard backend problems where reliability, performance, and correctness matter.

• Build & Own Critical Trading Services
  • Design, build, deploy, and operate scalable Java services powering trading, pricing, execution, and liquidity.
  • Own critical backend services end to end, from architecture and implementation to production support and continuous improvement.
  • Build systems that remain reliable under heavy traffic, partial failures, and changing market conditions.
• Trading, Execution & Liquidity
  • Develop and improve order management, execution, pricing, market data, and liquidity management capabilities.
  • Build and maintain integrations with exchanges, liquidity providers, custodians, payment providers, and other external platforms.
  • Improve execution quality through better pricing accuracy, spreads, fill rates, liquidity availability, and reduced slippage.
• Build Reliable Financial Systems
  • Design reliable order lifecycles covering validation, routing, execution, settlement, reconciliation, cancellations, retries, and recovery.
  • Ensure financial correctness across balances, positions, fees, and settlements through precision, idempotency, consistency, and auditability.
  • Build distributed systems that behave correctly under concurrency, retries, duplicate events, and eventual consistency.
• Improve Performance & Reliability
  • Continuously improve system performance, resilience, observability, throughput, and operational readiness.
  • Investigate production incidents, perform root cause analysis, and implement preventive improvements.
  • Build testing strategies covering unit, integration, contract, performance, and resilience testing.
• Raise the Engineering Bar
  • Participate in architecture and technical design decisions across the Trading & Liquidity squad.
  • Review code, mentor engineers, and help raise engineering standards across the team.
  • Collaborate closely with Product, Platform, QA, Security, Compliance, Risk, Finance, and Operations to deliver reliable financial systems.

Qualifications

• 5+ years of professional backend software engineering experience.
• Strong commercial experience building Java backend systems.
• Proven experience with Spring Boot and the wider Spring ecosystem.
• Experience owning production systems from design through operation.
• Experience building distributed systems, microservices, or event-driven architectures.
• Experience working in trading, crypto, exchanges, capital markets, payments, or other transaction-heavy financial environments.
• Experience mentoring engineers and improving engineering practices.

Requirements

• Java: JVM fundamentals, memory management, collections, generics, concurrency and multithreading, streams, performance optimisation, exception handling, and functional programming.
• Spring Ecosystem: Spring Boot, Spring MVC, Spring Security, Spring Data JPA, dependency injection, transaction management, scheduling, validation, and configuration.
• Databases: PostgreSQL or MySQL, SQL optimisation, indexing, transactions, isolation levels, data modelling, and connection pooling.
• Distributed Systems: Microservices, event-driven architecture, asynchronous processing, Kafka or RabbitMQ, service communication, eventual consistency, distributed transactions, idempotency, retries, caching, and failure recovery.
• Cloud & DevOps: Docker, Kubernetes, CI/CD pipelines, cloud platforms such as AWS or GCP, monitoring, logging, tracing, observability, and production operations.
• Security: Authentication, authorisation, API security, secure coding practices, secrets management, OAuth2, JWT, and OpenID Connect.

Benefits

• Competitive salary based on your skills and experience; annual merit-based reviews to keep your growth visible and rewarded.
• Annual performance reviews + clear promotion cycles; recognition for great work, from shoutouts to milestone rewards.
• Personal development fund (courses, books, conferences); study leave so you can keep learning.
• Fully remote forever + flexible working hours.
• Unlimited paid time off + Nigerian national holidays.
• Parental, sick, compassionate, and life event leave; we show up for you.
• Quarterly remote team hangouts + annual offsite; interest-based communities (SIGs).
• Regular engagement surveys; your voice matters.