Senior Fullstack Software Engineer

Responsibilities:

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

Requirements:

5+ years building and shipping production web applications, with at least 2 years of genuine full-stack ownership Strong JavaScript/TypeScript. 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 you 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

Preferred Requirements:

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

Who this role is not for:

Engineers who have only worked inside a large team on a narrow slice of a system Anyone who needs a fully specified ticket before they can start Anyone uncomfortable being accountable for production uptime

Remuneration:  NGN 400,000 – 600,000,(Gross) reviewed at confirmation and annually

Benefits:

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