C++ Senior Software Engineer

Archer · Recruitment agency
Full-time•Full-stack•Dublin, Ireland · Remote within Ireland
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At a glance

Employment type
Full-time
Workplace
Remote
Category
Full-stack

Technologies & skills

Primary technologies

PHPC++

Other technical skills

REST APIsSQL

What you'll be doing

Join a fast-scaling fintech as a Senior C++ Software Engineer, leading greenfield backend initiatives to build scalable payment infrastructure for underbanked communities. Take end-to-end technical ownership, architect core systems, and solve complex concurrency challenges in a fully remote, high-impact role.

  • Architect core infrastructure
  • Deliver greenfield features
  • End-to-end ownership of key system components

Key requirements

Must-have

  • 6+ years of professional software engineering experience delivering production C++ systems
  • Proven background in multi-threaded programming, concurrency controls, and system architecture
  • Strong proficiency in REST API design and microservices communication
  • Practical expertise with relational databases and SQL query optimization

Experience: 6+ years

Role signals

Technical focus
backend
Architecture / system design
Indicated in the listing
Hands-on vs management
Hands-on

Full job description

Senior C++ Software Engineer

  • **Purpose-Driven Greenfield Build **

  • **Global Impact **

  • Accelerated Growth

A fast-scaling global fintech organization is actively recruiting a Senior Software Engineer to join a lean, high-performing backend team. The company focuses on financial inclusion, developing scalable payment infrastructure designed to bring essential financial services and cross-border payments to underbanked communities worldwide.

This position combines high-impact social purpose with complex, low-level software engineering. You will lead greenfield initiatives, take end-to-end technical ownership of key system components, and resolve intricate concurrency challenges. Given the agile structure of the engineering team, your code will directly influence platform direction, offering exceptional visibility and rapid career growth as operations expand into new international regions.

This is an ideal environment for a seasoned C++ developer seeking full remote independence, significant technical ownership, and work that drives real global change.

Key Responsibilities

  • Architect Core Infrastructure

  • Deliver Greenfield Features

  • End-to-End Ownership

Candidate Profile

  • 6+ years of professional software engineering experience delivering production C++ systems.

  • Proven background in multi-threaded programming, concurrency controls, and system architecture.

  • Strong proficiency in REST API design and microservices communication.

  • Practical expertise with relational databases and SQL query optimization.

Compensation & Benefits

  • €70,000-€80,000

  • Full corporate benefits package.

  • Fully remote

For additional details or to arrange a confidential conversation, contact Samuel Knox at +353 1 960 9973 or submit 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 architect and deliver greenfield backend infrastructure for a global fintech, with a strong focus on concurrency, REST APIs, and SQL optimization. The position emphasizes technical ownership, complex problem-solving, and direct impact on scalable payment systems.

  • C++ system architecture·Medium
  • Concurrency and multi-threading·Medium
  • REST API design·High
  • SQL optimization·High

Only have 30 minutes?

Follow a focused preparation plan based on this job.

Start 30-minute prep

Your 30-minute plan

  1. Review and Summarize Key C++ Projects

    0–8 min

    Select 2-3 projects that best demonstrate your experience with backend architecture, concurrency, and technical ownership. Prepare concise summaries and outcomes.

  2. Refresh Concurrency and Multi-threading Concepts

    8–15 min

    Revisit advanced C++ concurrency patterns, common pitfalls, and debugging strategies relevant to production systems.

  3. Prepare REST API and SQL Optimization Examples

    15–22 min

    Identify specific instances where you designed APIs or optimized SQL queries, focusing on measurable impact and technical decisions.

  4. Draft Role-Specific Questions

    22–26 min

    Write down thoughtful questions about the team, technical stack, and growth opportunities to ask during the interview.

  5. Research the Company's Mission and Recent Initiatives

    26–30 min

    Understand the company's focus on financial inclusion and global payments to tailor your answers and show alignment with their purpose.

Likely questions

, 6 items

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

Talking points

, 5 items

  • End-to-End Ownership of System Components

    Demonstrate your ability to take responsibility for the full lifecycle of backend features, from design to deployment and maintenance.

  • Concurrency and Multi-threaded Programming

    Showcase your experience resolving complex concurrency issues and ensuring thread-safe, performant code in production C++ systems.

  • REST API and Microservices Communication

    Highlight your skills in designing robust APIs and integrating backend services, which are central to the platform's architecture.

  • SQL Query Optimization

    Illustrate your practical expertise in optimizing database queries for performance and scalability in high-throughput environments.

  • Greenfield Project Delivery

    Prepare examples of building new systems from scratch, emphasizing your approach to architecture, planning, and execution.

What to research

, 4 items

  • Recent C++ Backend Projects

    Review your most relevant C++ projects, focusing on those where you led architecture or solved complex concurrency issues.

  • REST API and Microservices Design

    Prepare to discuss your experience designing, implementing, and optimizing REST APIs and service-to-service communication.

  • SQL Query Optimization Techniques

    Refresh your knowledge of query analysis, indexing, and performance tuning in relational databases.

  • Greenfield Project Methodologies

    Be ready to explain your approach to building new systems from scratch, including planning, architecture, and delivery.

Questions to ask

, 6 items
  1. What are the main technical challenges currently facing the backend team?

    Why ask this? To understand where your expertise can have the most immediate impact.

  2. How is technical ownership distributed within the team, especially for greenfield projects?

    Why ask this? To clarify expectations around autonomy and responsibility.

  3. What tools and frameworks are currently used for REST API development and microservices orchestration?

    Why ask this? To assess the technical environment and identify any learning curve.

  4. How does the team approach code reviews and quality assurance in a fully remote setup?

    Why ask this? To gauge collaboration practices and code quality standards.

  5. What does success look like in this role after the first 6-12 months?

    Why ask this? To align your contributions with the company's expectations and growth plans.

  6. How does the company support professional growth and learning for senior engineers?

    Why ask this? To understand opportunities for development and advancement.

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Apply NowApply before: 14 Nov 2026