Senior Software Engineer – C++

Archer · Recruitment agency

Full-time•Full-stack•Ireland · Remote within Ireland

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TechJobs.ie Job Insights

At a glance

Employment type: Full-time
Location: Ireland · Remote within Ireland
Workplace: Remote
Category: Full-stack

Technologies & skills

Primary technologies

Go PHP C++

Other technical skills

REST APIs SQL HTML

What you'll be doing

Join a global fintech company as a Senior Software Engineer (C++), working on greenfield projects with real impact. You'll design, build, and maintain high-performance C++ applications, ship features across multiple languages, and enjoy full remote flexibility within Ireland.

Design, build, and maintain high-performance C++ applications
Ship new features across C++, Golang, PHP, and HTML
Work 100% remotely with a high degree of autonomy

Key requirements

Must-have

6+ years of hands-on software development experience with C++
Proven depth in multi-threading
Proven depth in REST API design
Solid background in SQL and relational databases

Experience: 6+ years

Role signals

Technical focus: full-stack
Hands-on vs management: Hands-on

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Full job description

**Pure Greenfield Work **
**Global Scale **
Fast-Track Progression

Looking to build greenfield software with real impact? A well-established, fast-growing global fintech company is expanding its tech team. Their mission is simple: use technology to give more people access to financial services worldwide.

You’ll be joining a tight, talented team where your work actually gets noticed. If you want true ownership over what you build, day-to-day variety, and the chance to solve hard technical problems alongside smart developers, this is it.

It’s an ideal spot for an experienced, self-driven engineer who wants the flexibility of a remote role paired with huge opportunities to step up as the company grows.

Key Responsibilities

Design, build, and maintain high-performance C++ applications.
Ship new features across C++, Golang, PHP, and HTML.
Work 100% remotely with a high degree of autonomy.
What We’re Looking For:
6+ years of hands-on software development experience with C++.
Proven depth in multi-threading and REST API design.
Solid background in SQL and relational databases.
Package: Competitive base salary (DOE) + comprehensive benefits package.

To learn more or have an informal chat, reach out to 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 Software Engineer (C++) to design and build high-performance, greenfield applications for a global fintech, with a strong emphasis on autonomy, technical depth, and full-stack feature delivery.

C++ multi-threading expertise·High
REST API design·High
Full-stack adaptability·Medium
Remote autonomy·Medium

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 min
Select 1-2 recent projects where you implemented multi-threading, and prepare concise stories highlighting challenges and solutions.
Refresh REST API and SQL Knowledge
8–15 min
Revisit REST API design patterns in C++ and review your experience with SQL query optimization and database schema design.
Prepare Cross-language Examples
15–20 min
Identify instances where you worked with Go, PHP, or HTML, and be ready to discuss how you adapted to different stacks.
Draft Questions for the Interviewer
20–25 min
Write down 3-4 thoughtful questions about the team’s technical challenges, remote processes, and growth opportunities.
Practice Communicating Remote Work Strategies
25–30 min
Reflect on your remote work habits and prepare to discuss how you ensure productivity, code quality, and team alignment.

Likely questions

Expand all

Priority reflects how strongly this topic is emphasised in the job listing, not whether it will be asked.

1Can you describe a greenfield C++ project you led or contributed to, and how you approached its architecture?High
Why they may ask
Assesses your experience with new system design and your ability to take ownership.
Prepare to discuss
- Clear description of project goals and requirements gathering.
- Explanation of architectural decisions and trade-offs.
- Discussion of challenges faced and how you overcame them.
- Evidence of impact and lessons learned.
Tip: Choose a project where you had significant responsibility and can discuss both technical and process aspects.
2How have you implemented multi-threading in C++ applications to improve performance or scalability?High
Why they may ask
Evaluates your depth in concurrency, a must-have skill for this role.
Prepare to discuss
- Specific examples of threading models or libraries used (e.g., std::thread, Boost, custom solutions).
- Explanation of synchronization, race conditions, and how you mitigated them.
- Performance improvements achieved.
- Awareness of pitfalls and debugging strategies.
Tip: Be ready to discuss both successes and challenges, including any bugs or deadlocks you resolved.
3Describe your experience designing and consuming REST APIs in a C++ environment.High
Why they may ask
Tests your ability to build and integrate with modern service architectures.
Prepare to discuss
- Details on frameworks or libraries used for REST (e.g., cpprestsdk, Boost.Beast).
- Approach to API versioning, error handling, and security.
- Examples of integrating with other services or languages.
- Discussion of testing and documentation practices.
Tip: Highlight cross-team collaboration and any API standards you followed.
4What strategies have you used to optimize SQL queries and database interactions in your applications?Medium
Why they may ask
Assesses your practical experience with relational databases and performance tuning.
Prepare to discuss
- Examples of query optimization and indexing.
- Use of ORMs or direct SQL, and rationale.
- Handling of transactions and data consistency.
- Monitoring and troubleshooting slow queries.
Tip: If possible, quantify improvements (e.g., reduced query time by X%).
5How do you ensure code quality and maintainability when working autonomously on remote teams?Medium
Why they may ask
Evaluates your self-management, communication, and code review practices.
Prepare to discuss
- Use of code reviews, automated testing, and documentation.
- Examples of proactive communication and knowledge sharing.
- Tools or processes for tracking progress and ensuring alignment.
Tip: Relate your answer to remote or distributed team experiences.
6Have you worked with Go, PHP, or HTML in addition to C++? How did you manage context switching between languages?Lower
Why they may ask
Assesses your adaptability and full-stack capabilities.
Prepare to discuss
- Examples of projects involving multiple languages.
- Approach to learning and applying new technologies.
- Strategies for maintaining code consistency and quality across stacks.
Tip: Even if your experience is limited, show willingness and ability to learn.

Talking points

Greenfield Project Experience
Demonstrate your ability to architect and deliver new systems from scratch, highlighting ownership and problem-solving.
Multi-threaded Application Design
Showcase your expertise in building robust, concurrent C++ applications, as this is a core requirement.
REST API Design and Implementation
Illustrate your experience designing and integrating RESTful APIs, which is central to the role.
SQL and Relational Database Skills
Provide examples of designing, optimizing, and troubleshooting SQL-based systems, as this is a key skill.
Full-stack Collaboration
Highlight your ability to work across C++, Go, PHP, and HTML, showing adaptability and breadth.

What to research

Recent C++ Multi-threading Projects
Review and prepare to discuss specific examples where you implemented or optimized multi-threaded C++ applications.
REST API Design in C++
Refresh your knowledge of RESTful API frameworks and best practices in C++, including security and error handling.
SQL Query Optimization
Prepare examples of how you have improved database performance and ensured data integrity in past roles.
Cross-language Collaboration
Be ready to discuss your experience working with Go, PHP, or HTML, and how you integrate with teams using different stacks.

Questions to ask

What are the main technical challenges the team is currently facing with their greenfield projects?
Why ask this? To understand the complexity and scope of the work you’ll be tackling.
How is technical ownership and decision-making structured within the team?
Why ask this? To gauge your level of autonomy and influence on architecture and implementation.
What is the typical process for code reviews and knowledge sharing in a fully remote setup?
Why ask this? To assess collaboration practices and expectations for remote work.
How does the team approach cross-stack development, especially when shipping features across C++, Go, PHP, and HTML?
Why ask this? To clarify expectations for full-stack contributions and learning opportunities.
What opportunities exist for professional growth and fast-track progression within the engineering team?
Why ask this? To align your career goals with the company’s advancement pathways.
How does the company support engineers in staying current with new technologies and best practices?
Why ask this? To understand the company’s commitment to ongoing learning and innovation.

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Apply NowApply before: 31 Oct 2026

Senior Software Engineer – C++

TechJobs.ie Job Insights

At a glance

Technologies & skills

What you'll be doing

Key requirements

Role signals

Similar jobs

Full job description

Key Responsibilities

Interview prep pack

Your interview focus

Only have 30 minutes?

Your 30-minute plan

Likely questions

Talking points

What to research

Questions to ask

Register now to upload your CV

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