$ whoami
Joel Ajide
I build systems that ▌
Senior Backend Engineer & ex-CTO based in Lagos, Nigeria. I specialize in building high-performance payment infrastructure, crypto on/off-ramps, and distributed systems that handle millions in transactions.
01. About Me
Mission Brieo
I'm a software engineer with 8+ years of experience building high-throughput systems at scale. As the former CTO of Scalex Technologies, I built crypto on/off-ramp infrastructure that processed $100k+ monthly across 15 countries.
Currently at Peniremit, I architect microservices handling3-5k daily transactions with 99.9%+ uptime. I've reduced inter-service latency by 40% (via gRPC) and message failures by 90% (via RabbitMQ migration).
I specialize in payment infrastructure, blockchain integrations, and distributed systems that actually work at scale.
8+
Years Experience
$100k+
Monthly Volume
15
Countries Served
99.9%
System Uptime
$ ls -la skills/
Backend
Database
Messaging
Blockchain
Cloud
02. Mission Log
Things I've Built
Scalex Technologies
featuredCTO & Co-Founder
Built crypto on/off-ramp infrastructure from zero. Partnered with EspressoCash, Gamic, Fonbnk, AlchemyPay.
03. Flight Log
Where I've Worked
Senior Backend Engineer, Lead Architect
@ Peniremit
Jul 2025 – Present
- ▹Built entire payment backbone from scratch
- ▹Architected 7 core microservices (wallet, payments, notifications)
- ▹Slashed inter-service latency 40% (REST → gRPC)
- ▹Cut message failures 90% (BullMQ → RabbitMQ)
- ▹Reduced query latency 60% (migrated to TimescaleDB)
CTO & Co-Founder
@ Scalex Technologies
Jan 2021 – Jan 2025
- ▹Built crypto on/off-ramp infrastructure from zero
- ▹Partners: EspressoCash, Gamic, Fonbnk, AlchemyPay
- ▹B2B2C SDK — reduced integration time from 4 weeks to 3 days
- ▹Gasless meta-transactions — 35% onboarding drop-off reduction
- ▹Scaled to $100k+ monthly volume across 15 countries
Senior Backend Engineer
@ Emple/Canalis Technologies
Oct 2024 – Jun 2025
- ▹Built 6 core microservices for insurance platform
- ▹Reduced payment integration time 85% (2 weeks → 2 days)
- ▹Achieved 99.5% message delivery rate with event-driven architecture
Software Engineer
@ CBIT Industries
Mar 2024 – Oct 2024
- ▹Built Control Tower System — 50% escalation response time reduction
- ▹Promotions engine — 15% checkout conversion increase
04. Achievements
Certifications & Awards
AI Interview Certification
micro1 • 2026
Demonstrated outstanding performance in AI technical assessment, evaluated by micro1 founder & CEO.
Frontier Engineering Challenge
micro1 • 2026
Participated in the Frontier Engineering Challenge, contributing ideas, engineering skill, and creativity.
04. Initiate Contact
Let's Connect
I'm currently open to new opportunities and collaborations. Whether you have a project in mind, need architecture consultation, or just want to say hi — I'd love to hear from you.
$ send_message