Lead/Senior Software Engineer

About Lithium Digital

Lithium Digital is a blockchain infrastructure and research company building next-generation systems for the decentralized internet.

We operate validator and infrastructure services across major blockchain networks and design developer tools that simplify distributed system deployment, monitoring, and analytics.

We're growing our engineering team to strengthen our core backend systems and next-gen API services supporting multi-chain connectivity and high-performance microservices.

The Role

We're looking for a Senior Backend Engineer with deep experience in Golang, distributed systems, and Linux environments — someone who thrives on solving complex problems, learns fast from documentation, and can work independently within a high-autonomy engineering culture.

You will build resilient, scalable backend services that interface with blockchain nodes, handle real-time data streams, and expose APIs to other microservices and clients.

Who You Are

• You've built and owned production-grade systems in Go.
• You're fluent in Linux, containerization, and CI/CD pipelines.
• You understand gRPC, microservice design, and data modeling (SQL + NoSQL).
• You write clean, testable, maintainable code, and can take a feature from design → deployment → monitoring.
• You're an independent learner who reads documentation, experiments, and ships solutions.
• You've worked on distributed or high-availability systems (fintech, infra, blockchain, or data platforms).
• Bonus: experience with Terraform, Ansible, or validator operations.

Why Lithium Digital

• Build real blockchain infrastructure, not just prototypes.
• Join a tight, high-performance team with ownership over architecture and execution.
• Collaborate with engineers running production validators, RPC endpoints, and microservices across ecosystems
• Grow with a company positioning itself as a top-tier blockchain infrastructure provider in Africa and globally.
• Earn above-market compensation for engineers who can think, design, and deliver independently.

Compensation: Competitive, senior-level package (₦500K+ range depending on experience and impact)

Job Type: Full-time

Pay: From ₦600,000.00 per month

Application Question(s):

• Describe a backend system or service you built or owned end-to-end.

What problem did it solve, and what were the biggest technical challenges you faced in scaling or maintaining it?

• In your own words, explain how Go handles concurrency.

Give one example of a race condition you've encountered (or could occur) in production, and how you would prevent it.

• Describe a time you solved a problem purely by reading documentation (not tutorials or Stack Overflow).

What was the issue, which documentation did you use, and how did you verify your understanding?

• You're designing a service that processes thousands of blockchain transaction updates per second.

Outline your approach to ensure scalability, reliability, and message consistency.

(Keep your answer high-level—architecture, data flow, and technologies.)

• Imagine one of your Go microservices suddenly starts consuming high CPU and memory.

Walk us through your step-by-step process to diagnose and resolve the issue.

• What's your preferred deployment pipeline for a Go microservice?

Explain how you manage configuration, secrets, and database migrations across environments.

• You're assigned to integrate a completely new protocol (no internal expertise).

Explain how you'd approach learning, testing, and implementing it within a week using documentation alone.

• What does technical ownership mean to you, and how have you demonstrated it in previous roles?

Education:

• Undergraduate (Preferred)

Experience:

• Golang: 5 years (Preferred)