Lead Engineer

Bullish, Inc.; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading technology firm in Greater London is seeking a seasoned backend developer with over 6 years of experience, particularly in Golang and high-performance systems. The ideal candidate should demonstrate exceptional mentorship skills and a commitment to quality while working on data-intensive applications and cloud architecture. Knowledge in blockchain and finance is preferred. This role emphasizes collaboration and influence across technical and non-technical teams.

Qualifications

• 6+ years in backend development with a focus on technical roadmaps.
• Proven expertise in architecting high-performance distributed systems.
• Strong practical experience with modern databases.

Responsibilities

• Drive the technical roadmap and operational excellence of subsystems.
• Influence technical stakeholders and build consensus across teams.
• Ensure system reliability through comprehensive testing strategies.

Skills

Golang

High-performance systems

Mentorship

Data-intensive applications

CI/CD pipelines

Cloud architecture

Blockchain technology

Docker

Observability

Job description

* Lead-Level Experience: 6+ years in backend development, with a proven track record in a Senior, Lead, or equivalent role where you have moved beyond individual tasks to drive the technical roadmap and operational excellence of critical sub-systems or service portfolios.* Technical Authority: Deep expertise in Golang, with a proven ability to architect high-performance, high-throughput distributed systems and concurrent services.* High-Level Mentorship & Influence: Proven ability to foster growth in others—whether through direct management or technical coaching—and act as a go-to resource for innovative solutions.* Data-Intensive Application Expertise: Strong practical experience with modern databases (e.g., Redis, PostgreSQL), including schema design, query optimization, and performance tuning for high-throughput workloads.* Full Lifecycle Ownership: A strong "DevSecOps" mindset with expertise in building and maintaining CI/CD pipelines, infrastructure-as-code, and robust observability (monitoring, logging, tracing) for production systems.* Quality as a Feature: A deep commitment to quality, demonstrated by implementing comprehensive testing strategies (unit, integration, end-to-end, performance) that ensure system reliability.* Influence and Collaboration: Exceptional communication skills with the proven ability to influence technical and non-technical stakeholders, articulate complex architectural decisions, and build consensus across multiple teams.* Cloud Architecture: Experience designing and deploying services on a major cloud provider (Azure, GCP).* Blockchain Expertise: A strong understanding of blockchain technology, cryptocurrencies, and decentralized ecosystems is a significant plus.* Financial Market Knowledge: Interest or prior experience in traditional financial markets, trading systems, or investment platforms.* Containerization & Deployment: Proficiency with containerization technologies such as Docker or Kubernetes.* Observability: Hands-on experience with modern observability tooling (e.g., Prometheus, DataDog, Jaeger, OpenTelemetry).* Data Governance: Experience with data privacy (GDPR/CCPA) and security compliance in a regulated financial environment.