Senior Backend Engineer (Hybrid) at Duplo

Duplo is building the platform to power the next generation of financial services. Our mission is to help companies expand financial access for all. Our simple and powerful banking-as-a-service API helps companies quickly launch financial products.

We are recruiting to fill the position below:

Job Title: Senior Backend Engineer

Location: Lagos (Hybrid)

Responsibilities
Backend Development:

• Design, develop, and maintain scalable, reliable backend systems using TypeScript and NestJS, with a focus on correctness in financial systems
• Design robust service boundaries and maintainable architecture across distributed services
• Architect and optimize PostgreSQL schemas for scale, including transaction handling, indexing strategy, and patterns that protect data correctness
• Apply Redis effectively for caching, coordination, rate-limiting, and distributed locking.

Cloud Infrastructure:

• Reason effectively about deployment safety, observability, scaling, and incident diagnosis in production environments running on Docker, Kubernetes, and AWS
• Maintain strong operational understanding of configuration and secrets handling, runtime behaviour, and rollback strategy
• Work closely with DevOps to ensure infrastructure decisions support reliability; treating infrastructure as a shared concern.

Technical Leadership:

• Champion technical design and implementation for large, high-risk, or high-complexity initiatives
• Break down complex technical requirements into manageable, well-sequenced work
• Mentor and guide junior engineers, raising engineering standards through example
• Make sound, well-reasoned decisions on architectural trade-offs, migration approaches, and rollout safety, and know when to escalate decisions with broader business impact.

Quality & Risk Ownership:

• Understand edge cases in money movement and design with operational safety and compliance in mind, not just functional correctness
• Drive thorough testing practices to ensure robust, reliable code before it reaches production
• Take responsibility for overall outcomes, not just tasks.

Collaboration:

• Work seamlessly with cross-functional partners  including product, compliance, finance, operations, support, QA, DevOps, and external providers, communicating clearly and adapting your approach to whoever you are working with
• Collaborate closely with fellow engineers through code review, pairing, and technical discussion, giving and receiving feedback in a way that raises the quality of the team's work, not just yours.

Documentation and Communication:

• Create clear technical documentation for system designs, APIs, and processes
• Communicate effectively with stakeholders through technical breakdowns and status updates.

Requirements
Technical Skills:

• Minimum of 7 years of backend engineering experience, with deep expertise in TypeScript and NestJS
• Strong command of PostgreSQL, including schema design for scale, transaction handling, and indexing strategy
• Practical expertise with Redis for caching, coordination, rate-limiting, and distributed locking
• Strong operational understanding of Docker, Kubernetes, and AWS
• Experience working within Agile/Scrum methodologies.

Software Engineering:

• Demonstrated experience in fintech systems, including orchestration, provider integration resilience, and compliance-sensitive design
• Deep understanding of sound architectural trade-offs and patterns that protect correctness in financial systems
• Strong commitment to writing clean, testable, maintainable code.

Professional Skills:

• A track record of owning complex, high-stakes technical work from design through to production, and standing behind the outcomes
• Strong communication skills, with the ability to work effectively across engineering, product, compliance, and external partners
• A demonstrated habit of catching your own issues before they reach QA or production, and of treating failure as something to learn from rather than deflect.

Experience:

• Experience mentoring or raising the technical standard of a team, not just delivering individually
• Demonstrated experience working in fintech or another high-compliance industry.

Application Closing Date
Not Specified. 

How to Apply
Interested and qualified candidates should:
Click here to apply online