C++ Senior Software Engineer
TechJobs.ie Job Insights
At a glance
- Employment type
- Full-time
- Location
- Dublin, Ireland
- Workplace
- On-site
- Category
- Full-stack
What you'll be doing
Global fintech seeks Senior C++ Engineer for greenfield payment engine build. Role focuses on low-latency backend infrastructure, concurrency, and global market expansion. Work in a small team, design scalable RESTful services, and collaborate with engineering leads. Offers strong career progression.
- Design, implement, and maintain low-latency C++ applications for payment workflows
- Build greenfield features using C++, Go, PHP, and SQL
- Partner with engineering leads and integration teams to deliver scalable RESTful services
Key requirements
Must-have
- 6+ years commercial C++ engineering experience in production
- Expertise in multi-threading, memory management, and concurrent systems
- Strong foundation in REST API design
- Experience with SQL performance tuning
Experience: 6+ years commercial C++ engineering experience
Role signals
- Technical focus
- backend infrastructure, concurrency, RESTful services
- Architecture / system design
- Indicated in the listing
- Hands-on vs management
- Hands-on
Similar jobs
Full job description
C++ Senior Software Engineer
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High-Scale Greenfield Build
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Global Fintech
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Career Progression
A global fintech focused on expanding financial inclusion is hiring a Senior C++ Engineer to help construct its next-generation payment engine. The platform facilitates critical financial access for underbanked markets across the globe.
This role is centered on heavy greenfield development. Working in a small, tight-knit team, you will take direct responsibility for high-performance backend infrastructure, solve difficult concurrency problems, and build features that directly support global market expansion.
This role has the genuine chance for quick career progression
Key Responsibilities
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Design, implement, and maintain low-latency C++ applications handling mission-critical payment workflows.
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Build greenfield features across C++, Golang, PHP, and relational databases (SQL).
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Partner with engineering leads and integration teams to deliver scalable RESTful services.
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Technical Requirements:
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6+ years commercial C++ engineering experience in production setups.
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Proven depth in multi-threading, memory management, and concurrent systems.
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Strong foundation in REST API design and SQL performance tuning.
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Benefits: Competitive base salary, comprehensive benefits package, and clear internal growth pathways.
To apply, contact Samuel Knox at +353 1 960 9973 or email .
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 high-performance, low-latency backend systems for a global fintech's greenfield payment platform, with a strong emphasis on concurrency, REST APIs, and SQL optimization.
- C++ Production Expertise·Medium
- Concurrency and Performance·Medium
- REST API and SQL Skills·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++ Projects
0–8 minSelect 1-2 recent projects where you led or contributed significantly to greenfield C++ backend development, and prepare to discuss your design and implementation choices.
Refresh Concurrency and Memory Management Concepts
8–15 minStudy your approaches to multi-threading, synchronization, and memory management, including tools and debugging techniques used.
Prepare REST API and SQL Optimization Stories
15–22 minIdentify examples where you designed RESTful services and improved SQL performance, focusing on measurable outcomes.
Plan Questions for the Interviewer
22–26 minSelect 3-4 questions from the provided list that matter most to you and tailor them to the company's context.
Practice Explaining Technical Decisions
26–30 minRehearse concise explanations of your technical choices and their business impact, especially for greenfield and high-scale systems.
Talking points
, 5 itemsGreenfield System Design in C++
Demonstrate your experience architecting and implementing new backend systems from scratch, especially in high-stakes environments.
Concurrency and Multi-threading Challenges
Showcase your ability to solve complex problems related to concurrent systems, including thread safety and performance.
RESTful Service Implementation
Highlight your experience designing and building REST APIs that are robust, scalable, and maintainable.
SQL Optimization and Performance Tuning
Provide examples of how you have improved database performance and handled large-scale data operations.
Cross-functional Collaboration
Illustrate your ability to work closely with engineering leads and integration teams to deliver end-to-end solutions.
What to research
, 4 itemsRecent C++ Greenfield Projects
Review your most relevant experiences building new systems in C++, focusing on design decisions and outcomes.
Concurrency and Memory Management Techniques
Refresh your knowledge of advanced multi-threading, synchronization, and memory management strategies in C++.
REST API and SQL Optimization Examples
Prepare concrete examples of REST API design and SQL performance tuning from your past work.
Collaboration with Engineering and Integration Teams
Think of situations where you worked closely with other technical teams to deliver backend features.
Questions to ask
, 6 itemsWhat are the main technical challenges currently facing the payment engine project?
Why ask this? Shows your interest in the real-world problems you'll be solving and helps you assess fit.
How is the team structured, and how do engineers collaborate across C++, Go, PHP, and SQL components?
Why ask this? Clarifies cross-functional collaboration and expectations for multi-language development.
What tools and processes are in place for ensuring code quality and performance in production?
Why ask this? Demonstrates your commitment to best practices and helps you understand the technical environment.
How does the company support career progression for senior engineers?
Why ask this? Connects to the listing's mention of growth opportunities and helps you plan your trajectory.
What is the typical workflow for designing and deploying new features in this greenfield environment?
Why ask this? Gives insight into the development lifecycle and your potential day-to-day responsibilities.
How does the team approach balancing technical debt with rapid feature delivery?
Why ask this? Shows your awareness of long-term codebase health and interest in sustainable engineering.
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