Senior Backend Engineer

Responsibilities:

Architect, develop, and maintain highly scalable backend services using Microservices Architecture and API-First design principles.

Design and implement distributed systems capable of supporting millions of payroll, recruitment, talent management, and workforce transactions.

Build the core platform powering Droomwork Payroll, Droomwork Hire, and future HR infrastructure products.

Develop secure RESTful APIs, webhooks, event-driven services, and SDKs for internal teams, enterprise customers, and third-party developers.

Design authentication, authorization, and identity management systems using OAuth2, JWT, RBAC, and multi-tenant security models.

Implement event-driven architectures using message queues and streaming technologies.

Build integrations with payment gateways, banking APIs, tax authorities, pension providers, identity verification services, ERP platforms, and HRIS solutions.

Design resilient data architectures using PostgreSQL, SQL, and NoSQL databases with replication, sharding, caching, and high-availability strategies.

Lead the adoption of Domain-Driven Design (DDD), Clean Architecture, and engineering best practices.

Build AI-ready infrastructure for intelligent workflows, document processing, recommendations, predictive analytics, and workflow automation.

Optimize system performance, observability, reliability, and fault tolerance using monitoring, logging, tracing, and automated alerting.

Design and maintain CI/CD pipelines, infrastructure automation, containerized deployments, and cloud-native environments using Docker and Kubernetes.

Implement enterprise security best practices, including encryption, secrets management, audit logging, rate limiting, and compliance controls.

Collaborate closely with Product, Frontend, DevOps, AI, and QA teams to deliver production-ready software.

Mentor engineers through code reviews, architecture discussions, documentation, and engineering standards.

Evaluate emerging technologies that improve scalability, developer productivity, platform reliability, and operational efficiency.

Participate in technical roadmap planning and architectural decisions supporting Droomwork's AI-native HR platform vision.

Ensure backend services maintain high availability, disaster recovery readiness, and zero-downtime deployment.

Build reusable platform services such as: Notifications, Workflow orchestration, Audit services, File processing, Search, Billing, Permissions, and Organization management

Champion engineering excellence through testing, automation, documentation, performance benchmarking, and continuous improvement.

Requirements:

A visionary systems thinker who understands how to build AI-native, API-first distributed systems, not just applications.

6+ years of production experience building and scaling distributed or SaaS platforms.

Deep expertise in multi-tenant architecture, API-first design, and microservices.

Strong knowledge of databases, DevOps, and cloud infrastructure.

Experience building and shipping API-first digital products.

Hands-on experience building AI-native products from scratch.

Experience integrating AI and automation workflows into product infrastructure.

Proven ability to manage complex technical projects and deliver results in fast-paced environments.

Experience with HR, FinTech, or Enterprise SaaS platforms is preferred.

A hands-on builder who is comfortable writing production code and setting up systems.

Based in, or willing to relocate to, Port Harcourt, Nigeria.