Bio Template — Software Developer 💻

A ready-to-copy Bio template for software engineers, backend/frontend developers, and tech leads. Quantified impact, action verbs, no fluff.

Copy the block below into a new file (e.g. my-bio.md or my-bio/en.md) and adapt it to your career.

---
name: Daniel Okafor
language: en
status: published
visibility: public
role: Senior Backend Engineer
location: Berlin, DE
email: [email protected]
phone: "+49 151 2345 6789"
linkedin: https://linkedin.com/in/danielokafor
github: https://github.com/danielokafor
website: https://danielokafor.dev
x: https://x.com/dokafor_dev
---

## Professional Summary

Senior backend engineer with 9+ years of experience designing distributed systems, payment infrastructure, and high-throughput APIs. Track record of leading platform migrations, mentoring engineers, and shipping reliable software at scale (10M+ monthly active users).

## Experience

### Senior Backend Engineer — Klarna
*April 2022 – Present | Berlin, DE (Hybrid)*

- **Designed** a new event-driven settlement pipeline handling 8k tps with p99 < 120ms.
- **Reduced** AWS infrastructure costs by 32% through query optimization and right-sizing.
- **Led** the migration of 14 services from monolithic Ruby to Go microservices.
- **Mentored** 4 mid-level engineers; 2 promoted to senior within 18 months.

### Backend Engineer — Zalando
*August 2018 – March 2022 | Berlin, DE*

- **Built** the inventory reservation service backing checkout for 50M+ customers.
- **Implemented** a circuit-breaker pattern that cut cascading failures by 90%.
- **Owned** on-call rotation for 6 services; reduced mean-time-to-recovery from 45 to 12 minutes.

### Software Developer — Andela
*September 2015 – July 2018 | Lagos, NG / Remote*

- **Delivered** 11 client projects in fintech and logistics using Node.js and PostgreSQL.
- **Open-sourced** a TypeScript validation library, now at 4.2k GitHub stars.

## Education

### B.Sc. in Computer Science
*University of Lagos | 2011 – 2015 | First Class Honours*

## Certifications

- **AWS Certified Solutions Architect — Professional** (2023)
- **Certified Kubernetes Administrator (CKA)** (2022)

## Skills

- **Languages:** Go, TypeScript, Python, Rust (intermediate).
- **Backend:** gRPC, REST, Kafka, PostgreSQL, Redis, ElasticSearch.
- **Infrastructure:** AWS (EKS, RDS, Lambda), Terraform, Kubernetes, Docker.
- **Practices:** Domain-Driven Design, Event Sourcing, TDD, observability (OpenTelemetry).
- **Languages (Human):** English (C2), German (B2), Yoruba (Native).

## Open Source & Talks

- **`tsv` — Schema Validator for TypeScript** — 4.2k stars, 60+ contributors. 
- **"Migrating a Monolith Without Downtime"** — GoLab Conference, Florence, 2024.
- **"Designing Idempotent APIs"** — Berlin Backend Meetup, 2023.

💡 Tip: For a directory-style Bio, save your photo at attachments/avatar.jpg and Sentilis will pick it up automatically.