Senior Backend Engineer at Duplo

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• • Senior Backend Engineer at Duplo
  • View Jobs in ICT / Telecommunication / View Jobs at Duplo

  Posted: Jul 17, 2026

  Deadline: Not specified

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  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.

  
  

  Senior Backend Engineer

  • Job Type Full Time , Hybrid
  • Qualification
  • Experience 7 years
  • Location Lagos
  • Job Field ICT / Computer&nbsp

  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.

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  Method of Application

  Interested and qualified? Go to Duplo on duplo.bamboohr.com to apply

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