Senior Software Engineer

As a Senior Software Engineer at Lak-Che, you take full ownership of KonectX, a live community Wi-Fi platform. You own one product end to end: a React/Vite frontend, Node/Express API, MongoDB database, revenue settlement engine, and $KXT token integration on Celo. You report to the CTO and work from our Lekki, Lagos office on a hybrid basis. French is a strong plus.

What you'll do

• Take ownership of the existing KonectX codebase (React/Vite frontend, Node.js/Express API, MongoDB) and bring it to a completed, documented, tested state
• Build and complete the operator dashboard with hotspot management, voucher issuance, session monitoring, and earnings visibility
• Implement and maintain the revenue settlement engine, including multi-party splits, credit maturation windows, payout requests, and an auditable ledger
• Integrate payment rails for Nigeria and Francophone markets, including card, bank transfer, and mobile money
• Work on captive portal and router-side integration to record sessions reliably even on unstable links
• Maintain and improve the Web3 layer: $KXT balance accrual, distribution jobs, and wallet-facing views on Celo
• Own deployment and uptime on your VPS estate: nginx, PM2, Cloudflare, environment and secret hygiene, backups, monitoring, and incident response
• Deliver every user-facing surface
• Write documentation as you go; undocumented work is treated as unfinished work
• Work with the CISO to close outstanding security items and keep the platform compliant with NDPA 2023

What you bring

• 5 years building and shipping production web applications, with at least 2 years of genuine full-stack ownership
• Strong JavaScript/TypeScript with deep, practical Node.js and Express experience
• Strong React, including hooks, state management, and modern build tooling such as Vite
• Real MongoDB experience: schema design, indexing, aggregation, and knowing when a document database is the wrong choice
• You have deployed and operated your own servers; Linux, nginx, process managers, TLS, DNS, and reverse proxies are not mysteries to you
• You have written code that handles money and understand why that code is different from other code
• Git discipline, code review habits, and the ability to write tests that catch real regressions
• You can pick up an unfamiliar codebase, understand it, and improve it without breaking it
• Clear written English

Nice to have

• Experience with Web3: ERC-20 tokens, EVM chains, ethers.js or viem, wallet integration, or Celo specifically
• Experience with payment integrations in Africa such as Paystack, Flutterwave, or mobile money aggregators
• Networking exposure: captive portals, RADIUS, MikroTik or OpenWRT, hotspot management
• Experience as the most senior engineer on a product or as a first engineering hire

What we offer

• Salary of NGN 400,000 to 600,000 gross monthly
• Full technical ownership of a live product with paying users and a real expansion roadmap
• Direct access to founders with no layers between you and the decisions
• Hybrid working: three days onsite at the Lekki office, two days remote
• Paid annual leave, statutory pension, PAYE handled, and a formal employment contract
• Hardware and tooling provided
• Exposure to DePIN, Web3, and cross-border African infrastructure
• A three-month probation period with clear, written success criteria agreed in week one

About Lak-Che

Lak-Che operates KonectX, a live community Wi-Fi platform building infrastructure for Africa using DePIN and Web3 technologies.