Senior Software Engineer Java, Trading & Liquidity

About Quidax

Quidax is where money meets limitless possibilities. Were making it super easy for individuals businesses and fintechs in Africa to access crypto. Our goal Providing real value for our customers today while shaping the future of money.

About the Role

Were 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. Youll build and operate Java services that power trading pricing liquidity order execution settlement and exchange integrations. These are systems where milliseconds matter failures have financial impact and every design decision counts.
Youll thrive here if youve built transaction-heavy financial systems before enjoy thinking deeply about distributed systems and concurrency and love taking ownership of critical services from design through production.

What Youll Be Owning

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.

Biggest Challenges Youll Tackle

This isnt a role where youre simply building APIs.

• Youll be solving engineering problems where correctness speed and resilience all matter at the same time.
• Some of the challenges youll tackle include:
• Building systems that continue operating reliably during volatile market conditions.
• Designing distributed systems that remain consistent despite failures retries and duplicate events.
• Improving latency and execution quality without sacrificing correctness.
• Managing concurrency race conditions transaction boundaries and eventual consistency across critical financial systems.
• Building exchange and liquidity-provider integrations that remain resilient when external systems fail.
• Delivering systems where balances settlements and financial records remain accurate and fully auditable.

What Were Looking For

Were looking for someone who enjoys owning complex backend systems and takes pride in building software that performs reliably in production.

Experience

• 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.

Technical Skills

You should have strong practical experience across most of the following areas:

• 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.

Trading & Liquidity Knowledge

Youll be comfortable working with concepts such as:

• Order books and matching engines.
• Market limit and stop orders.
• Bid/ask pricing spreads liquidity and slippage.
• Order routing and execution.
• Market data and pricing feeds.
• Exchange and liquidity-provider integrations.
• Settlement reconciliation balances and positions.
• Decimal precision and financial calculations.
• Risk controls and abnormal market behaviour.

Youll Stand Out If You

• Take ownership of systems rather than just writing code.
• Enjoy solving production problems and improving reliability.
• Can clearly explain technical decisions and trade-offs.
• Raise the quality of engineering through mentoring and code reviews.
• Stay calm when solving complex production incidents.
• Care deeply about building systems that customers can trust.

Reporting Line

Youll report to the Engineering Manager for the Trading & Liquidity squad and work closely with Product Platform QA Security Compliance Risk Finance and Operations to build reliable financial systems.

Why Quidax

At Quidax were building the future of finance in Africa through crypto. Youll have the freedom to innovate the space to lead and the backing to build something that truly scales. If youre ready to build an engineering org that delivers excellence at scale lets talk.

Whats In It For YouWhen you join Quidax youre not just taking a job youre jumping into a community thats bold remote-first and building for the future. Heres what you get:

Fair Pay Ownership

• Competitive salary based on your skills and experience; annual merit-based reviews to keep your growth visible and rewarded

Growth Thats Real

• 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

Work That Works For You

• Fully remote forever flexible working hours

Time Off That Respects Life

• Unlimited paid time off Nigerian national holidays
• Parental sick compassionate and life event leave; we show up for you

Connection That Feels Real

• Quarterly remote team hangouts annual offsite; interest-based communities (SIGs)
• Regular engagement surveys; your voice matters

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