C++ Senior Software Engineer – Fully Remote
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At a glance
- Employment type
- Contract
- Location
- Ireland · Remote within Ireland
- Workplace
- Remote
- Category
- Full-stack
What you'll be doing
Contract role for a Senior C++ Engineer to build greenfield, high-scale backend systems for a fintech focused on global financial inclusion. Full technical ownership, remote from Ireland, working on multi-threaded C++ apps, REST APIs, and SQL. Collaborate with a core team to deliver resilient payment infrastructure.
- Design, develop, and maintain high-throughput, low-latency C++ applications for international payments
- Deliver new backend features using C++, Golang, PHP, and HTML
- Drive features end-to-end from technical design to production
- Work directly with core engineering leads and tech partners
Key requirements
Must-have
- 6+ years of production software engineering experience with C++
- Expertise in multi-threaded programming and high-concurrency systems
- Strong knowledge of REST API design principles
- Experience with relational databases and efficient SQL
Experience: 6+ years of production software engineering experience with C++
Role signals
- Technical focus
- backend
- Architecture / system design
- Indicated in the listing
- Hands-on vs management
- Hands-on
Similar jobs
Full 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
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Build Core Architecture: Design, develop, and maintain high-throughput, low-latency C++ applications powering international payments.
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Ship Greenfield Features: Deliver brand-new backend capabilities using C++, Golang, PHP, and HTML to extend payment access globally.
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Own Delivery: Drive features end-to-end from technical design to production, working directly with core engineering leads and tech partners.
What You Bring
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6+ years of production software engineering experience with C++.
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Deep hands-on expertise in multi-threaded programming and high-concurrency systems.
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Strong knowledge of REST API design principles.
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Solid background working with relational databases and writing efficient SQL.
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Pragmatic contract mindset—able to hit the ground running and take immediate technical ownership.
Contract Details
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Type: Daily Rate Contract (Initial 6–12 month duration with strong extension likelihood).
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Location: Fully Remote.
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Rate: Highly competitive daily rate (DOE).
To discuss rate details or review the setup confidentially, reach out to Samuel Knox at +353 1 960 9973 or send your CV directly to .
Interview prep pack
Grounded in this listing. Use it to prepare examples before you apply.
Your interview focus
Based on this listing, the role is a fully remote, contract-based Senior C++ Software Engineer position focused on building greenfield, high-scale backend systems for a fintech platform with a global impact. The position emphasizes technical ownership, multi-threaded programming, REST API design, and efficient SQL within a fast-moving, collaborative team.
- C++ multi-threading expertise·Medium
- REST API design·High
- SQL/database optimization·High
- Autonomous feature delivery·High
Only have 30 minutes?
Follow a focused preparation plan based on this job.
Start 30-minute prep
Your 30-minute plan
Review Multi-threaded C++ Projects
0–8 minSelect 1-2 recent projects involving multi-threading and concurrency; prepare concise stories highlighting your technical decisions and outcomes.
Summarize REST API Design Experience
8–14 minOutline your approach to REST API design, including scalability, security, and real-world examples.
Refresh SQL Optimization Knowledge
14–20 minRevisit key SQL optimization strategies and prepare a specific example of improving database performance.
Map Out End-to-End Feature Delivery
20–25 minThink through your process for delivering features from design to deployment, noting tools and collaboration points.
Prepare Mission-Driven Motivation Statement
25–30 minReflect on your motivation for working on impactful fintech projects and how it aligns with the company's mission.
Talking points
, 5 itemsMulti-threaded Programming in C++
Demonstrate your ability to design and debug high-concurrency systems, as this is central to the platform's performance and reliability.
REST API Design Principles
Showcase your experience building scalable, maintainable APIs, which is crucial for integrating payment services and external partners.
Efficient SQL and Relational Database Use
Highlight your skills in optimizing queries and schema design to ensure backend systems can handle high transaction volumes.
Greenfield System Architecture
Prepare to discuss how you approach designing new systems from scratch, including technical decision-making and trade-offs.
End-to-End Feature Delivery
Illustrate your ability to own features from design through production, reflecting the autonomy and responsibility expected in this role.
What to research
, 4 itemsRecent C++ Multi-threaded Projects
Review and be ready to discuss specific examples of multi-threaded C++ systems you have built or maintained, focusing on concurrency challenges and solutions.
REST API Design and Implementation
Prepare to explain your approach to designing and building REST APIs, especially for high-throughput or mission-critical systems.
SQL Optimization Techniques
Refresh your knowledge of optimizing SQL queries and schema design for performance in relational databases.
End-to-End Feature Delivery
Think through your process for taking features from design to production, including collaboration and deployment practices.
Questions to ask
, 6 itemsWhat are the biggest technical challenges currently facing the core platform build?
Why ask this? To understand where your expertise can have the most immediate impact.
How does the team approach architectural decisions for new greenfield features?
Why ask this? To gauge the level of autonomy and collaboration in technical design.
What tools and processes are in place for code review, testing, and deployment?
Why ask this? To clarify expectations for code quality and delivery practices.
How does the company measure the success and impact of new features on financial inclusion?
Why ask this? To connect your work to the broader mission and understand key performance indicators.
What is the typical workflow for collaborating with engineering leads and tech partners?
Why ask this? To learn about communication and decision-making structures within the team.
Are there opportunities to contribute to technology choices or influence the backend stack?
Why ask this? To assess your potential influence on technical direction.
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