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Oare Arene

Senior Software Engineer · 7+ years

I build backend systems, AI-native products, and developer tools that hold up in production.

I take difficult products from idea to production, with a focus on reliable APIs, distributed services, PostgreSQL, and practical AI-enabled software. I care about ownership after launch as much as shipping.

Selected workResume

About & expertise

Curious about how difficult systems work and how to make them simpler.

I’m a Senior Software Engineer who works on meaningful, business-critical problems: scalable backend systems, high-volume APIs, PostgreSQL-backed applications, and distributed services. I enjoy taking an idea through architecture, implementation, deployment, and the less glamorous work of keeping it reliable.

Shipping matters, but so do maintainability, performance, and clear ownership. That perspective also shapes my work on practical AI-enabled products and developer tools.

Backend
Ruby, Elixir/OTP, Go, Python, REST, GraphQL, Kafka, distributed systems
Infrastructure
AWS, GCP, Docker, Kubernetes, CI/CD, Datadog, Prometheus, Sentry, Kibana
Databases
PostgreSQL, MySQL, MongoDB, migrations, query performance
Developer Tools
API design, observability, automation, developer experience
AI
Retrieval, agent workflows, local AI, knowledge systems
Frontend
TypeScript, JavaScript, React, Next.js

Selected Impact

A selection of production systems, migrations, and product outcomes from the last 7+ years.

  1. Senior Software Engineer · Marley Spoon

    Led the extraction of the Promotions domain from a Rails monolith into an independent service. Owned the architecture, APIs, deployment, migrations, monitoring, and rollout. Optimized PostgreSQL and Kubernetes autoscaling for high-volume traffic spikes.

    • Ruby
    • PostgreSQL
    • Kubernetes
    • APIs
    • Observability

  2. Senior Software Engineer · Fincra

    Led the migration of legacy payment workflows from a monolith to microservices, improving performance and maintainability by 60%. Raised test coverage to 70% while delivering financial APIs.

    • Microservices
    • Financial APIs
    • Testing

  3. Backend Engineer · Omise · Andela partner engagement

    Built production payment APIs with an emphasis on reliability, security, and data accuracy. Reduced support complaints by 50% and refactored an internal service used for annual reporting.

    • Payment APIs
    • Microservices
    • Reliability

  4. Software Engineer · Engineering program · Andela

    Delivered partner and internal products across backend and frontend work, contributed features associated with a 133% performance-based upsell increase, and mentored engineers. Omise was a partner engagement within this period.

    • Backend
    • Frontend
    • Mentoring

Featured Projects

OpenBooks transaction management screenLive, active development

OpenBooks

A live multi-tenant budget tracker for small organizations that need clear, accountable shared finances.

Next.jsReactTypeScriptPostgreSQLSupabaseRow Level SecurityTanStack QueryVitest
Who Am I? Bible trivia game home screenMVP live, active development

Who Am I?

A live Bible identity quiz with solo, pass-and-play, and real-time multiplayer modes.

ReactTypeScriptNode.jsExpressSocket.ioPostgreSQLSupabaseViteVitest
Esan Language ModelProject case study
Early research

Esan Language Model

A long-term open-source effort to improve AI accessibility for the Esan language.

Building Now

These are the problems and tools I’m spending time on now.

Tessari

The PRD and system design cover hybrid retrieval, source permissions, connectors, and optional answer synthesis. Development has not started yet.

Read the design notes

Agent workflows & local AI

Prototyping practical workflows where agents and local models support real work without hiding how decisions are made.

Elixir tooling & developer experience

Investigating tools that make concurrent systems easier to build, understand, and operate.

Open Source

Public work and projects I intend to develop in the open, with their current status.

Intended open source, development not started

Tessari

A self-hosted knowledge retrieval design with source permissions and optional cited answers.

Let’s talk

You can find my work on GitHub or connect with me on LinkedIn.