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Senior Performance Engineer Jobs in Delaware (NOW HIRING)

AceStack LLC

Senior Hadoop developer

Newark, DE · On-site

Senior Hadoop Developer Employment Type: Full-Time Location: Newark, DE Primary Skill: Hadoop ... Optimize performance for large-scale distributed data processing and ML workloads. * Collaborate ...

Corporation Service Company

Senior Systems Engineer

Dover, DE · On-site +1

$104K - $142K/yr

Senior Systems Engineer - Network Engineering Wilmington, DE Monday - Friday 8:00 AM - 5:00 PM ... optimal performance and scalability. * Troubleshooting and resolving complex network issues ...

Judge Group, Inc.

Sr. Data Engineer

Wilmington, DE · On-site

$102K - $139K/yr

Our client is seeking an experienced Senior Data Engineer to join their growing data team. This is ... Ensure data quality, reliability, and performance across systems * Support and enhance data ...

Bloom Energy

Senior Staff Quality Engineer

Newark, DE

$86K - $117K/yr

We are looking for a Senior Staff Quality Engineer to join our team in one of today's most exciting ... Apply SPC techniques to monitor End of Line Testing performance data of the Fuel Cell Power Module ...

Iff

Senior Automation Engineer

Wilmington, DE

$100K - $132K/yr

... performance, advance sustainability and enhance health and wellness across multiple markets. Be ... As part of this team, the Senior Automation Engineer will help enable reliable, efficient and ...

Syner-G

Sr. Process Engineer

Newark, DE

$101K - $131K/yr

The Senior Process Engineer will support technology transfer from development to commercial ... Conduct data analysis and performance trending to identify root causes, variability drivers, and ...

Syner-G

Sr. Process Engineer

Newark, DE

$101K - $131K/yr

The Senior Process Engineer will support technology transfer from development to commercial ... Conduct data analysis and performance trending to identify root causes, variability drivers, and ...

Chase

Senior Quality Automation Engineer

Wilmington, DE · On-site

$85K - $116K/yr

Senior Quality Automation Engineer In Credit Card As a Senior Quality Automation Engineer in Credit ... Experience with performance, monitoring, or reliability tooling (for example, load testing and ...

Syner-G

Sr. Process Engineer

Newark, DE · On-site

$101K - $131K/yr

The Senior Process Engineer will support technology transfer from development to commercial ... Conduct data analysis and performance trending to identify root causes, variability drivers, and ...

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All JobsSenior Performance Engineer JobsSenior Performance Engineer Jobs in Delaware

Senior Performance Engineer information

See Delaware salary details

$59.6K

$126.7K

$183.7K

How much do senior performance engineer jobs pay per year?

As of Jun 26, 2026, the average yearly pay for senior performance engineer in Delaware is $126,666.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,600.00 and $143,600.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Senior Performance Engineer position, and why are they important?

To thrive as a Senior Performance Engineer, expertise in performance analysis, capacity planning, and system optimization—often backed by a degree in computer science or a related field—is crucial. Familiarity with tools such as LoadRunner, JMeter, APM solutions, profiling tools, and relevant certifications like CPPE or PMP are highly beneficial. Strong problem-solving, collaboration, and clear communication skills are vital for identifying bottlenecks and working closely with cross-functional teams. These combine to ensure robust system performance, user satisfaction, and reliable application scalability in demanding technical environments.

What are the most common responsibilities of a Senior Performance Engineer on a day-to-day basis?

A Senior Performance Engineer typically oversees performance testing cycles, analyzes system metrics, and collaborates with development and operations teams to diagnose and resolve performance issues. Daily tasks often include designing and executing test plans, monitoring application behavior under load, and recommending improvements for scalability and efficiency. They also participate in code reviews and architectural discussions to identify potential bottlenecks early in the development cycle. Consistent communication with both technical and non-technical stakeholders is key, ensuring that performance goals align with business objectives.

What is a Senior Performance Engineer job?

A Senior Performance Engineer is responsible for optimizing the performance, scalability, and reliability of software applications and systems. They analyze performance metrics, conduct load and stress testing, identify bottlenecks, and work with development teams to implement improvements. This role requires expertise in profiling tools, performance tuning, and system architecture to ensure optimal user experience. Additionally, they may establish best practices for performance testing and contribute to overall system design decisions.

What are popular job titles related to Senior Performance Engineer jobs in Delaware? For Senior Performance Engineer jobs in Delaware, the most frequently searched job titles are:
What job categories do people searching Senior Performance Engineer jobs in Delaware look for? The top searched job categories for Senior Performance Engineer jobs in Delaware are:
What cities in Delaware are hiring for Senior Performance Engineer jobs? Cities in Delaware with the most Senior Performance Engineer job openings:
Senior Performance Engineer jobs near you
Infographic showing various Senior Performance Engineer job openings in Delaware as of June 2026, with employment types broken down into 95% Full Time, 3% Part Time, and 2% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $126,666 per year, or $60.9 per hour.
Lead .Net Platform Engineer (Payments Ingestion) - Senior Vice President

Lead .Net Platform Engineer (Payments Ingestion) - Senior Vice President

Citigroup, Inc.

New Castle, DE • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 14 days ago

Job description

About the Role
We are seeking an experienced, hands-on Senior .Net Lead to contribute to the development of our engineering frameworks, with a strong focus on microservice architecture. This senior engineering leadership role merges hands-on technical contribution with organizational accountability. The ideal candidate will remain deeply involved in the code and architecture while simultaneously owning the platform strategy, defining engineering standards, and guiding a scrum team in developing core functionalities within the payments lifecycle.
Key Responsibilities
1. Hands-On Technical Contribution & System Design
  • Actively code in .Net developing reusable frameworks while performing system design, architecture reviews, and code reviews for the core cheque payment platform.
  • Contribute to the design of distributed, fault-tolerant, real-time systems for high-volume, low-latency transaction processing.
  • Write, review, and refactor production-grade code in .Net setting a high technical standard for the team.
  • Independently design event-driven, microservices-based architectures utilizing REST APIs, .Net. React knowledge is a plus.
  • Apply hands-on experience with Kafka, including message schema design, topic partitioning, consumer group strategies, and fault-tolerant processing.
  • Design and govern data architecture across Oracle (SQL) and MongoDB (NoSQL), covering schema design, indexing strategies, query optimization, and data consistency patterns.
  • Champion continuous development, feature flags, and progressive delivery, contributing to the design and optimization of CI/CD pipelines.
  • Produce and review Architecture Decision Records (ADRs) and technical design documents for key platform components.

2. Engineering Excellence & Quality
  • Maintain and enforce engineering standards within the scrum team, including Test-Driven Development (TDD), reusable framework development, CI/CD, secure coding, and observability.
  • Conduct code reviews for critical platform components, providing detailed technical feedback to enhance team quality and capacity, ensuring the development of scalable and reusable services.
  • Drive the adoption of AI-powered quality practices, including leveraging tools like GitHub Copilot for coding, utilizing LLMs (Gemini experience preferred) to improve payment processing quality, and implementing automated test script generation and vulnerability remediation.
  • Lead performance engineering initiatives, including profiling JVM-based applications identifying performance hotspots, and optimizing critical settlement processing paths.
  • Own the security and compliance posture of the cheque payment platform by participating in threat modeling, vulnerability assessments, and secure design reviews.
  • Ensure all engineering delivery aligns with Citi Engineering Excellence Standards, including CI/CD, DevOps, cloud-native practices, and modern ways of working.

3. Platform Strategy & Domain Ownership
  • Define and own the engineering roadmap for modernizing the cheque payment platform, migrating global components from monolithic mainframe and legacy applications to a reusable microservices architecture.
  • Develop strong domain knowledge in the payment lifecycle, settlement, and cheque image processing to inform sound engineering decisions.
  • Own the platform's SLA commitments, driving architectural decisions to meet availability, throughput, and latency targets.
  • Develop cross-platform integration by governing API contracts, data flows, and system dependencies across the Payments, Settlements, DDA, and Data Lake ecosystems.
  • Drive capacity planning and investment prioritization, making informed decisions on platform scaling, technology refresh, and resource allocation.
  • Partner with Operations, Risk, Compliance, and Business teams to ensure the platform meets all regulatory requirements and business needs.

4. Leadership & Stakeholder Engagement
  • Act as the primary engineering point of contact for the core Cheque Processing pillar, engaging with senior business, technology, and operations stakeholders.
  • Clearly communicate platform health, delivery progress, engineering strategy, and risks to senior leadership.
  • Partner with Product, Operations, Risk, Finance, and Compliance teams to align engineering priorities with business and regulatory needs.
  • Demonstrate the ability to pivot direction to meet timelines and delivery commitments with tactical solutions, while maintaining a clear vision for strategic platform development.

Skills and Qualifications
1. Core Programming & System Architecture
  • .Net: 10+ Extensive hands-on experience in high-throughput, production-grade .Net engineering, including JVM performance tuning.
  • API Development: Hands-on experience building RESTful APIs with frameworks such as Spring MVC or Spring Boot.
  • Microservices Architecture: Proven experience designing microservices ecosystems, including service decomposition, API design, inter-service communication, and cloud engineering.
  • Event-Driven & Messaging Systems: Deep, hands-on expertise in Kafka, including topic design, partitioning, consumer groups, exactly-once semantics, and high-throughput stream processing.
  • High-Performance Computing: Hands-on experience with profiling and optimization, including JVM tuning, garbage collection (GC) optimization, thread management, and memory profiling.
  • High Availability & Fault Tolerance: Practical experience designing resilience patterns such as circuit breakers, bulkheads, failover, and disaster recovery.
  • Databases: Hands-on expertise in Oracle (SQL) and Microsoft SQL for schema design, query optimization, and indexing, as well as MongoDB (NoSQL) for document modeling, aggregation pipelines, sharding, and replica sets.

2. Cloud & DevOps
  • Cloud-Native Engineering: Hands-on experience with OpenShift/AWS, Kubernetes, and Docker for container orchestration, autoscaling, and cloud-native deployment.
  • CI/CD & DevOps: Experience designing and owning CI/CD pipelines aligned with enterprise-level Engineering Excellence Standards. Experience with tools like Jenkins and Gradle/Maven.
  • Observability: Hands-on experience with distributed tracing, intelligent alerting, and AI-driven observability using tools like Grafana.
  • Secure Engineering: Practical experience with threat modeling, vulnerability assessments, and secure design reviews.
  • Agile at Scale: Experience with Agile/SAFe delivery at the program level, including PI planning, cross-team dependency management, and delivery governance.

Good-to-Have Skills
  • ML Integration: Hands-on experience with real-time ML model serving, including feature stores, online inference, and model monitoring.
  • AI Frameworks: Familiarity with Retrieval-Augmented Generation (RAG) patterns, vector databases (e.g., Pinecone, Weaviate), or agentic AI frameworks (e.g., LangChain, AutoGen).
  • MLOps: Knowledge of MLOps practices such as model versioning, deployment pipelines, and production model monitoring.
  • Resilience Testing: Experience with chaos engineering and resilience testing, including fault injection and production readiness reviews.
  • Financial Systems: Knowledge of reconciliation and exception handling patterns in settlement workflows.
  • LLM Experience: Familiarity with prompt engineering and LLM fine-tuning in a regulated enterprise context.
  • Python: Hands-on expertise in Python for data pipelines, AI/ML integration, scripting, and automation.
  • Legacy Modernization: Experience with large-scale transformation projects, including migrating mainframe components (COBOL, Assembler) and legacy systems (C++, .NET) to a microservices architecture.
  • Strategy: Experience with technology investment governance and engineering budget management.

What We Are Looking For
  • A hands-on leader who actively contributes to code, frameworks, reviews, and technical problem-solving.
  • A strategic thinker who is equally comfortable at the code/architecture level and the platform strategy/stakeholder management level.
  • A pragmatic innovator who identifies practical, high-value opportunities to apply AI/ML without losing focus on engineering fundamentals.
  • An accountable owner with a strong sense of ownership for platform quality, reliability, and delivery.
  • A mentor committed to developing engineers and managers, building technical capability and leadership depth across the team.
  • An effective communicator able to translate technical complexity into clear, concise updates for business and senior leadership.

Why Join Us
  • Lead engineering for a central global payment platform while remaining deeply technical.
  • Drive AI and engineering transformation on a high-visibility modernization initiative with significant business impact.
  • Work at the intersection of high-throughput financial systems and modern AI capabilities.
  • Build and mentor a strong engineering team with access to state-of-the-art tools, platforms, and talent.
  • Be part of an engineering culture that values technical depth at every level of seniority.

Education:
  • Bachelor's degree/University degree or equivalent experience
  • Master's degree preferred

Job Family Group:
Technology
Job Family:
Applications Development
Time Type:
Full time
Primary Location:
New Castle Delaware United States
Primary Location Full Time Salary Range:
$156,160.00 - $234,240.00
In addition to salary, Citi's offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.
Most Relevant Skills
Please see the requirements listed above.
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.
Anticipated Posting Close Date:
Jun 22, 2026
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.
If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.
View Citi's EEO Policy Statement and the Know Your Rights poster.

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