C++ Senior Software Engineer – Fully Remote
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At a glance
- Employment type
- Full-time
- Workplace
- Remote
- Category
- Full-stack
What you'll be doing
Join a fintech company as a Senior C++ Software Engineer, working fully remotely from Ireland. You'll design and build high-throughput, low-latency C++ applications for international payments, tackle greenfield projects, and own features end-to-end in a small, impactful team focused on financial inclusion.
- Design, develop, and maintain high-throughput, low-latency C++ applications for international payments
- Deliver new software capabilities using C++, Go, PHP, and HTML
- Drive end-to-end features from technical design through to delivery
- Collaborate with senior engineers, support teams, and international partners
Key requirements
Must-have
- 6+ years of hands-on C++ software development experience in production environments
- Deep understanding of multi-threaded programming and high-concurrency systems
- Strong expertise in REST API design principles and microservice communication
- Solid experience working with relational databases and writing efficient SQL
- Independent, problem-solving mindset with a passion for clean, dependable code
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
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Purpose-Driven Greenfield Build
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Global Impact
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Accelerated Growth
A well-established, rapidly expanding fintech company is hiring a Senior Software Engineer to join a close-knit engineering team building tech that matters. Their core mission is driving financial inclusion—creating modern payment infrastructure to deliver vital financial services and payments to underprivileged and underbanked populations worldwide.
This is a rare blend of real-world impact and high-caliber engineering. You’ll be tackling greenfield projects, taking full ownership of critical backend components, and solving complex technical puzzles alongside a sharp, collaborative team. Because the core engineering group is still small, your contributions will be highly visible, and your path for career progression is wide open as the platform expands into new global markets.
If you’re an experienced, self-motivated C++ developer who wants total remote autonomy, hard technical challenges, and work that makes a genuine difference, this is a fantastic opportunity.
What You’ll Be Doing
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Build Core Architecture: Design, develop, and maintain high-throughput, low-latency C++ applications that power international payments.
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Ship Greenfield Features: Deliver new software capabilities using C++, Golang, PHP, and HTML to expand financial access in emerging markets.
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Own the Stack: Drive end-to-end features from technical design through to delivery, working directly with senior engineers, support teams, and international partners.
What You Bring
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6+ years of hands-on C++ software development experience in production environments.
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Deep understanding of multi-threaded programming and high-concurrency systems.
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Strong expertise in REST API design principles and microservice communication.
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Solid experience working with relational databases and writing efficient SQL.
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An independent, problem-solving mindset with a passion for clean, dependable code.
The Offer
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Highly competitive base salary (commensurate with experience).
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Comprehensive benefits package.
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Full remote flexibility and a high-trust, low-bureaucracy culture.
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Clear, accelerated career progression within a growing global organization.
Interested in hearing more? Contact Samuel Knox for a confidential discussion 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 for a Senior C++ Software Engineer to design and build core backend architecture for a fintech platform focused on global financial inclusion, with a strong emphasis on greenfield development, high-concurrency systems, and RESTful APIs.
- C++ production expertise·Medium
- Concurrency and multi-threading·Medium
- REST API and microservices·High
- SQL/database integration·High
Only have 30 minutes?
Follow a focused preparation plan based on this job.
Start 30-minute prep
Your 30-minute plan
Review Advanced C++ and Concurrency Concepts
0–8 minRefresh your knowledge of multi-threading, synchronization, and performance optimization in C++.
Prepare Examples of REST API and Microservice Projects
8–14 minSelect 1-2 projects where you designed or implemented RESTful APIs and be ready to discuss your approach.
Revisit SQL Optimization and Database Integration
14–20 minReview past experiences optimizing SQL queries and integrating C++ with relational databases.
Outline End-to-End Feature Delivery Stories
20–25 minPrepare concise stories demonstrating your ownership of features from design to deployment.
Draft Role-Specific Questions
25–30 minWrite down 3-4 thoughtful questions about the team, technology, and company culture to ask during the interview.
Talking points
, 5 itemsDesigning High-Throughput, Low-Latency C++ Applications
You will need to demonstrate experience building performant backend systems for real-time or high-volume use cases.
Implementing Multi-Threaded and Concurrent Systems
The role requires deep understanding of concurrency, so be ready to discuss threading models, synchronization, and performance tuning.
REST API Design and Microservice Communication
You should be able to explain how you design, implement, and secure RESTful APIs and manage service-to-service interactions.
Efficient SQL and Relational Database Usage
Prepare examples of optimizing queries, schema design, and integrating C++ applications with relational databases.
End-to-End Feature Ownership in Greenfield Projects
Showcase your ability to take features from technical design through delivery, especially in new or rapidly evolving codebases.
What to research
, 4 itemsRecent C++ Backend Projects
Review your most relevant C++ projects, especially those involving high-throughput, low-latency systems and multi-threading.
REST API and Microservice Design
Prepare to discuss your experience designing, implementing, and documenting RESTful APIs and microservices.
SQL Optimization Techniques
Refresh your knowledge of query optimization, indexing, and schema design for relational databases.
End-to-End Feature Delivery
Think through examples where you owned features from design to deployment, especially in small or agile teams.
Questions to ask
, 6 itemsWhat are the biggest technical challenges the team is currently facing with the payment platform?
Why ask this? To understand the complexity and immediate priorities of the role.
How does the team approach code reviews and maintain code quality in a greenfield environment?
Why ask this? To gauge the engineering culture and quality standards.
What is the typical workflow for delivering a new feature from concept to production?
Why ask this? To clarify expectations for end-to-end ownership and collaboration.
How does the company support professional growth and career progression for engineers?
Why ask this? To assess opportunities for advancement and skill development.
What technologies or frameworks are used alongside C++ in the backend stack?
Why ask this? To understand the broader technical environment and integration points.
How does the team collaborate with international partners and support teams?
Why ask this? To learn about cross-functional and cross-cultural communication expectations.
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