C++ Senior Software Engineer – Fully Remote

Archer; United Kingdom; Hybrid; GBP 92,000 - 166,000; Full time

Job summary

Archer is seeking a Senior C++ Contract Software Engineer for a fully remote, daily-rate engagement to accelerate a greenfield fintech platform. You’ll own core backend components, tackle high-throughput, low-latency design, and ship robust code across distributed systems.

You bring 6+ years in production C++, strong multi-threading, REST API design, and SQL experience. Expect high autonomy, collaboration with a fast-moving core team, and meaningful global impact.

Qualifications

• 6+ years of production software engineering in C++.
• Deep hands-on expertise in multi-threaded programming and high-concurrency systems.
• Strong knowledge of REST API design.
• Relational databases experience and writing efficient SQL.

Responsibilities

• Build Core Architecture: Design, develop, and maintain high-throughput, low-latency C++ applications powering international payments.
• Ship Greenfield Features: Deliver brand-new backend capabilities using C++, Golang, PHP, and HTML to extend payment access globally.
• Own Delivery: Drive features end-to-end from technical design to production, working directly with core engineering leads and tech partners.

Skills

C++

Multi-threaded programming

REST API design

SQL

Contract mindset

Job description

Senior C++ Contract Software Engineer | Fully Remote

Daily Rate Contract

Purpose-Driven Greenfield Build | Global Impact | High Autonomy

How often do you get to contract on high-scale C++ systems that directly improve lives? A well-established, rapidly expanding fintech company is bringing on an experienced Contract Senior C++ Engineer to help accelerate its core platform build.

The company’s mission is driving global financial inclusion—building resilient payment infrastructure to deliver vital financial services and payments to underprivileged and underbanked populations worldwide.

This is a high-impact contract focused on pure greenfield delivery. You’ll take full technical ownership of key backend components, solve complex multi-threading and API challenges, and work alongside a sharp, collaborative core team. Because the team moves fast with zero corporate friction, you can focus on doing what you do best: shipping clean, reliable code that scales.

If you’re a seasoned C++ contractor looking for a meaningful project, hard engineering problems, and complete remote flexibility, this is a great match.

What You’ll Be Doing

• Build Core Architecture: Design, develop, and maintain high-throughput, low-latency C++ applications powering international payments.
• Ship Greenfield Features: Deliver brand-new backend capabilities using C++, Golang, PHP, and HTML to extend payment access globally.
• Own Delivery: Drive features end-to-end from technical design to production, working directly with core engineering leads and tech partners.

What You Bring

• 6+ years of production software engineering experience with C++.
• Deep hands-on expertise in multi-threaded programming and high-concurrency systems.
• Strong knowledge of REST API design principles.
• Solid background working with relational databases and writing efficient SQL.
• Pragmatic contract mindset—able to hit the ground running and take immediate technical ownership.

Contract Details

• Type: Daily Rate Contract (Initial 6–12 month duration with strong extension likelihood).
• Location: Fully Remote.
• Rate: Highly competitive daily rate (DOE).