C++ Senior Software Engineer – Fully Remote
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At a glance
- Employment type
- Full-time
- Workplace
- Remote
- Salary
- €65k-75k/year (EUR)
- Category
- Full-stack
What you'll be doing
Join a global fintech as a Senior C++ Software Engineer working on greenfield payment systems projects. Take end-to-end ownership of backend systems, collaborating with a lean team to deliver secure, high-throughput solutions for underbanked populations. Fully remote within Ireland with rapid career progression.
- Lead backend software projects from technical design to launch
- Design, build, and maintain low-latency, high-throughput payment systems
- Develop new features and components using C++, Golang, PHP, and HTML
- Collaborate with developers, support teams, and external partners to solve engineering challenges
Key requirements
Must-have
- 6+ years of hands-on C++ software development experience in production
- Strong background in multi-threaded programming and high-concurrency architecture
- Experience with REST API design
- Solid experience with relational databases and performance-tuned SQL
Experience: 6+ years
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++ Software Engineer | Fully Remote (Ireland)
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Pure Greenfield Projects
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100% Flexible & Remote (Ireland-Based)
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Rapid Career Progression & High Visibility
Join an established, fast-growing global fintech operating in the booming payments sector. The company builds secure payment systems to deliver vital financial services to underprivileged and underbanked populations worldwide.
This role combines meaningful real-world impact with true technical ownership and a great team dynamic. Because the core engineering team is lean and fast-moving, your work will be highly visible, giving you a clear path for fast-tracked career growth as the platform expands into new global markets. While being truly flexible.
What You Will Do
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Take Ownership: Lead backend software projects end-to-end from initial technical design straight through to launch.
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Build Payment Systems: Design, build, and maintain low-latency, high-throughput systems powering international payment rails.
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Ship Greenfield Code: Develop brand-new features and components using C++, Golang, PHP, and HTML.
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Collaborate: Work closely with software developers, support teams, and external client partners to solve complex engineering challenges.
What You Need
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6+ years of hands-on C++ software development experience in production environments.
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Strong background in multi-threaded programming, high-concurrency architecture, and REST API design.
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Solid experience working with relational databases and writing efficient, performance-tuned SQL.
The Offer
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Salary: €65,000 – €75,000 + comprehensive benefits package.
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100% Remote & Flexible: Complete remote work flexibility (candidates must be based in Ireland).
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Fast Career Growth: High visibility, direct impact, and genuine room to advance your career quickly.
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High-trust, low-bureaucracy culture built around delivery and technical autonomy.
To hear more about the role or have a confidential chat, contact Samuel Knox on +353 1 960 9973 or email 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 Senior C++ Software Engineer role is a fully remote, Ireland-based position focused on leading greenfield backend projects in the fintech payments sector, with a strong emphasis on technical ownership, multi-threaded programming, and high-performance systems.
- C++ production expertise·Medium
- Concurrency and performance·High
- REST API design·High
- SQL/database optimization·High
Only have 30 minutes?
Follow a focused preparation plan based on this job.
Start 30-minute prep
Your 30-minute plan
Review C++ Multi-threading and Concurrency Projects
0–8 minSelect 1-2 recent projects where you solved concurrency challenges and be ready to discuss your approach and results.
Prepare REST API and Payment System Examples
8–15 minIdentify examples where you designed or improved REST APIs, especially with a focus on security and scalability.
Summarize SQL Optimization Experience
15–20 minList specific instances where you improved database performance and be ready to explain your methods and outcomes.
Research the Company’s Mission and Payments Sector Trends
20–25 minUnderstand the company’s focus on underbanked populations and current trends in fintech payments to tailor your answers.
Draft Role-Specific Questions
25–30 minPrepare thoughtful questions about technical challenges, team structure, and growth opportunities to ask during the interview.
Talking points
, 6 itemsEnd-to-End Project Leadership
Prepare examples where you led backend projects from design through launch, demonstrating technical ownership and delivery.
Multi-threaded Programming in C++
Showcase your experience designing and debugging high-concurrency systems, especially in production environments.
REST API Design and Implementation
Be ready to discuss how you have designed, built, and maintained RESTful APIs, focusing on scalability and security.
Performance Optimization with SQL
Demonstrate your ability to write efficient SQL queries and optimize relational database performance for high-throughput systems.
Greenfield Development
Share stories of building new features or systems from scratch, highlighting your approach to architecture and problem-solving.
Collaboration Across Teams
Give examples of working closely with developers, support, and external partners to solve complex engineering challenges.
What to research
, 4 itemsRecent C++ Backend Projects
Review and prepare to discuss specific backend systems you have designed and implemented using C++.
Concurrency and Multi-threading Techniques
Refresh your knowledge of multi-threaded programming patterns, debugging tools, and concurrency issues in C++.
REST API and Payment System Security
Be ready to explain your approach to designing secure, scalable REST APIs, especially in the context of payment systems.
SQL Performance Tuning
Prepare examples of optimizing SQL queries and relational database schemas for high-throughput applications.
Questions to ask
, 6 itemsWhat are the main technical challenges your team is currently facing in building payment systems?
Why ask this? Shows your interest in the team's real-world problems and readiness to contribute.
How is technical ownership and autonomy structured within the engineering team?
Why ask this? Clarifies expectations around leadership, decision-making, and visibility.
What is the typical process for launching new greenfield features or systems?
Why ask this? Helps you understand the workflow and your potential impact.
How does the team ensure code quality and maintainability in a fast-moving environment?
Why ask this? Assesses the engineering culture and practices around quality.
What opportunities exist for career progression and technical growth within the company?
Why ask this? Aligns your ambitions with the company's growth and advancement paths.
How do you collaborate with external partners or clients during the development process?
Why ask this? Gives insight into cross-team and external communication expectations.
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