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Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!

MongoDB

Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!

full-timePosted: Feb 6, 2026

Job Description

Role Overview

Join the MongoDB Query Execution Team as a Senior Software Engineer, Query Execution in Dublin, Ireland. This is your chance to develop a fast, modular distributed query system powering critical workloads for nearly 60,000 customers, including 75% of the Fortune 100. Work on execution algorithms, new query language features, performance tuning, and more. Based in our Dublin office or remotely in Ireland, you'll contribute to MongoDB Atlas, the leading cloud-native, multi-cloud database across AWS, Google Cloud, and Azure.

MongoDB is redefining databases for the AI era, enabling innovators to modernize legacy systems and unleash AI applications. As a modern developer data platform, MongoDB empowers rapid innovation at market speed. This role offers hands-on impact on NoSQL database technology used by AI-native startups and enterprises worldwide.

Key Responsibilities at MongoDB

  • Understand and improve current functionality of the MongoDB query engine for optimal performance.
  • Contribute high-quality C++ code and actively give/receive feedback in code reviews.
  • Identify, design, implement, test, and support new features for query performance and robustness.
  • Build query language enhancements and diagnostics for performance issues.
  • Integrate query systems with other MongoDB products, tools, and distributed systems.
  • Tune database performance to support customers' most critical workloads.
  • Work constructively with peers to deliver excellent technical solutions.
  • Lead major feature development and mentor new engineers within 12 months.
  • Fix bugs in stable releases and contribute to upcoming major versions.

Qualifications & Requirements

  • 5+ years in systems programming, building industrial-strength software.
  • Experience with large codebases in C++, C, Rust, or similar compiled languages.
  • Solid CS fundamentals: data structures, algorithms, software design/architecture.
  • Database or data management systems experience (huge plus, not required).
  • B.Sc in Computer Science or equivalent practical experience.
  • Interest in database query engines; hands-on experience or M.Sc./Ph.D a plus.

Success measures include contributing to major releases in 3 months, independent delivery in 6 months, and leading features/mentoring in 12 months.

Salary & Benefits

Competitive salary estimated at $120,000 - $180,000 USD base (adjusted for Ireland market), plus equity. Enjoy Competitive Equity, Wellness Programs, MongoDB University courses, Global Family Leave, fertility assistance, parental leave, affinity groups, and more. MongoDB commits to employee wellbeing, supportive culture, and accommodations for disabilities. As an equal opportunity employer, we foster diversity and inclusion.

Why Join MongoDB?

MongoDB is the most widely available, globally distributed database, powering the next era of software. With offices worldwide and a Leadership Commitment guiding decisions, we prioritize innovation, collaboration, and impact. Work on cutting-edge NoSQL, query optimization, and distributed query systems that disrupt industries.

Our cloud-native MongoDB Atlas supports multi-cloud deployments, helping organizations embrace AI and modernize workloads. Join a team where your C++ expertise drives real-world change for Fortune 100 companies and startups. Experience a enriching culture with personal growth opportunities, from code reviews to leading major features.

Dublin offers vibrant tech hub vibes, or go fully remote in Ireland. Be part of redefining databases for the AI era—apply now to power innovation at MongoDB!

How to Apply

Ready to build the future of MongoDB query execution? Submit your application with REQ ID: 4263321371. Highlight your C++ systems programming, database experience, and passion for query engines. Our recruiters will contact you for next steps, including accommodations if needed. Don't miss this Senior Software Engineer role in Dublin—apply today and join MongoDB's mission to empower innovators worldwide.

(Word count: 1427)

Locations

  • Dublin, Dublin, Ireland (Remote)

Salary

Estimated Salary Rangehigh confidence

126,000 - 198,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • C++ Programmingintermediate
  • Query Optimizationintermediate
  • Database Systemsintermediate
  • Distributed Systemsintermediate
  • NoSQL Databasesintermediate
  • MongoDB Atlasintermediate
  • Data Structuresintermediate
  • Algorithmsintermediate
  • Systems Programmingintermediate
  • Performance Tuningintermediate
  • Rust Programmingintermediate
  • Large Codebasesintermediate
  • Code Reviewintermediate
  • Software Architectureintermediate
  • Query Execution Enginesintermediate

Required Qualifications

  • 5+ years of experience in systems programming with industrial-strength software (experience)
  • Hands-on experience with large codebases in C++, C, Rust or similar compiled languages (experience)
  • Solid computer science fundamentals including data structures, algorithms, and software design (experience)
  • Experience in databases or data management systems (huge plus) (experience)
  • B.Sc in Computer Science or equivalent practical experience (experience)
  • Interest in database query engine theory and practice; advanced degrees a plus (experience)

Responsibilities

  • Understand and improve current functionality of the MongoDB query engine
  • Contribute high-quality C++ code and participate in code reviews
  • Identify, design, implement, test, and support new query performance features
  • Enhance query language capabilities and robustness
  • Develop diagnostics for query performance problems
  • Integrate query systems with other MongoDB products and tools
  • Work collaboratively with peers to deliver technical solutions
  • Tune database performance for critical customer workloads
  • Lead development of major features and mentor junior engineers

Benefits

  • general: Competitive Equity packages for long-term growth
  • general: Wellness Programs including mental health support
  • general: MongoDB University for continuous learning and certification
  • general: Global Family Leave with generous parental policies
  • general: Fertility assistance and family planning support
  • general: Employee affinity groups for diversity and inclusion
  • general: Hybrid and remote work flexibility in Ireland
  • general: Comprehensive health and retirement benefits
  • general: Office perks in Dublin with global collaboration opportunities

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MongoDBC++Query EngineDublin JobsRemote IrelandDatabase EngineeringNoSQLSystems ProgrammingSenior Software Engineer Query Execution MongoDBMongoDB careers Dublin IrelandC++ query engine developer jobsDistributed query systems engineerNoSQL database performance tuningMongoDB Atlas query optimizationSystems programming jobs remote IrelandDatabase query engine C++ rolesSenior engineer MongoDB DublinQuery language features developerMongoDB software engineer salaryRemote C++ jobs IrelandAI database engineering careersMongoDB query execution teamHigh performance database jobsRust systems programmer MongoDBPTO Query

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MongoDB logo

Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!

MongoDB

Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!

full-timePosted: Feb 6, 2026

Job Description

Role Overview

Join the MongoDB Query Execution Team as a Senior Software Engineer, Query Execution in Dublin, Ireland. This is your chance to develop a fast, modular distributed query system powering critical workloads for nearly 60,000 customers, including 75% of the Fortune 100. Work on execution algorithms, new query language features, performance tuning, and more. Based in our Dublin office or remotely in Ireland, you'll contribute to MongoDB Atlas, the leading cloud-native, multi-cloud database across AWS, Google Cloud, and Azure.

MongoDB is redefining databases for the AI era, enabling innovators to modernize legacy systems and unleash AI applications. As a modern developer data platform, MongoDB empowers rapid innovation at market speed. This role offers hands-on impact on NoSQL database technology used by AI-native startups and enterprises worldwide.

Key Responsibilities at MongoDB

  • Understand and improve current functionality of the MongoDB query engine for optimal performance.
  • Contribute high-quality C++ code and actively give/receive feedback in code reviews.
  • Identify, design, implement, test, and support new features for query performance and robustness.
  • Build query language enhancements and diagnostics for performance issues.
  • Integrate query systems with other MongoDB products, tools, and distributed systems.
  • Tune database performance to support customers' most critical workloads.
  • Work constructively with peers to deliver excellent technical solutions.
  • Lead major feature development and mentor new engineers within 12 months.
  • Fix bugs in stable releases and contribute to upcoming major versions.

Qualifications & Requirements

  • 5+ years in systems programming, building industrial-strength software.
  • Experience with large codebases in C++, C, Rust, or similar compiled languages.
  • Solid CS fundamentals: data structures, algorithms, software design/architecture.
  • Database or data management systems experience (huge plus, not required).
  • B.Sc in Computer Science or equivalent practical experience.
  • Interest in database query engines; hands-on experience or M.Sc./Ph.D a plus.

Success measures include contributing to major releases in 3 months, independent delivery in 6 months, and leading features/mentoring in 12 months.

Salary & Benefits

Competitive salary estimated at $120,000 - $180,000 USD base (adjusted for Ireland market), plus equity. Enjoy Competitive Equity, Wellness Programs, MongoDB University courses, Global Family Leave, fertility assistance, parental leave, affinity groups, and more. MongoDB commits to employee wellbeing, supportive culture, and accommodations for disabilities. As an equal opportunity employer, we foster diversity and inclusion.

Why Join MongoDB?

MongoDB is the most widely available, globally distributed database, powering the next era of software. With offices worldwide and a Leadership Commitment guiding decisions, we prioritize innovation, collaboration, and impact. Work on cutting-edge NoSQL, query optimization, and distributed query systems that disrupt industries.

Our cloud-native MongoDB Atlas supports multi-cloud deployments, helping organizations embrace AI and modernize workloads. Join a team where your C++ expertise drives real-world change for Fortune 100 companies and startups. Experience a enriching culture with personal growth opportunities, from code reviews to leading major features.

Dublin offers vibrant tech hub vibes, or go fully remote in Ireland. Be part of redefining databases for the AI era—apply now to power innovation at MongoDB!

How to Apply

Ready to build the future of MongoDB query execution? Submit your application with REQ ID: 4263321371. Highlight your C++ systems programming, database experience, and passion for query engines. Our recruiters will contact you for next steps, including accommodations if needed. Don't miss this Senior Software Engineer role in Dublin—apply today and join MongoDB's mission to empower innovators worldwide.

(Word count: 1427)

Locations

  • Dublin, Dublin, Ireland (Remote)

Salary

Estimated Salary Rangehigh confidence

126,000 - 198,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • C++ Programmingintermediate
  • Query Optimizationintermediate
  • Database Systemsintermediate
  • Distributed Systemsintermediate
  • NoSQL Databasesintermediate
  • MongoDB Atlasintermediate
  • Data Structuresintermediate
  • Algorithmsintermediate
  • Systems Programmingintermediate
  • Performance Tuningintermediate
  • Rust Programmingintermediate
  • Large Codebasesintermediate
  • Code Reviewintermediate
  • Software Architectureintermediate
  • Query Execution Enginesintermediate

Required Qualifications

  • 5+ years of experience in systems programming with industrial-strength software (experience)
  • Hands-on experience with large codebases in C++, C, Rust or similar compiled languages (experience)
  • Solid computer science fundamentals including data structures, algorithms, and software design (experience)
  • Experience in databases or data management systems (huge plus) (experience)
  • B.Sc in Computer Science or equivalent practical experience (experience)
  • Interest in database query engine theory and practice; advanced degrees a plus (experience)

Responsibilities

  • Understand and improve current functionality of the MongoDB query engine
  • Contribute high-quality C++ code and participate in code reviews
  • Identify, design, implement, test, and support new query performance features
  • Enhance query language capabilities and robustness
  • Develop diagnostics for query performance problems
  • Integrate query systems with other MongoDB products and tools
  • Work collaboratively with peers to deliver technical solutions
  • Tune database performance for critical customer workloads
  • Lead development of major features and mentor junior engineers

Benefits

  • general: Competitive Equity packages for long-term growth
  • general: Wellness Programs including mental health support
  • general: MongoDB University for continuous learning and certification
  • general: Global Family Leave with generous parental policies
  • general: Fertility assistance and family planning support
  • general: Employee affinity groups for diversity and inclusion
  • general: Hybrid and remote work flexibility in Ireland
  • general: Comprehensive health and retirement benefits
  • general: Office perks in Dublin with global collaboration opportunities

Target Your Resume for "Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!" , MongoDB

Get personalized recommendations to optimize your resume specifically for Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now!" , MongoDB

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

MongoDBC++Query EngineDublin JobsRemote IrelandDatabase EngineeringNoSQLSystems ProgrammingSenior Software Engineer Query Execution MongoDBMongoDB careers Dublin IrelandC++ query engine developer jobsDistributed query systems engineerNoSQL database performance tuningMongoDB Atlas query optimizationSystems programming jobs remote IrelandDatabase query engine C++ rolesSenior engineer MongoDB DublinQuery language features developerMongoDB software engineer salaryRemote C++ jobs IrelandAI database engineering careersMongoDB query execution teamHigh performance database jobsRust systems programmer MongoDBPTO Query

Answer 10 quick questions to check your fit for Senior Software Engineer, Query Execution Careers at MongoDB - Dublin, Dublin | Apply Now! @ MongoDB.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.