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Senior Python Developer Jobs in Delaware (NOW HIRING)

Corporation Service Company

Senior Systems Engineer

Dover, DE · On-site +1

$104K - $142K/yr

  • PTO

Senior Systems Engineer - Network Engineering Wilmington, DE Monday - Friday 8:00 AM - 5:00 PM ... Developing and maintaining network automation scripts using Ansible and Python to streamline ...

Corporation Service Company

Senior Systems Engineer

Dover, DE · On-site

$83K - $113K/yr

  • PTO

Senior Systems Engineer - Network Engineering Wilmington, DE Monday - Friday 8:00 AM - 5:00 PM ... Developing and maintaining network automation scripts using Ansible and Python to streamline ...

Arka Infotech Inc

Sr. Network Engineer

Wilmington, DE

$100K - $138K/yr

Sr. Network Engineer Location: Wilmington, DE Length: 2 years F2F MAY BE REQUIRED Looking for ... Working knowledge of Python or other current scripting languages. Qualifications BS Degree ...

Info Way Solutions

Java Full Stack Engineer

Wilmington, DE · On-site

$51 - $65.75/hr

Intermediate, Senior, Super Senior) • Strong hands-on experience in Java, Python, and AWS • Proficiency with CI/CD, DevOps practices, Git, and unit testing • Experience with authentication ...

W. R. Berkley Corporation

Sr. AI Engineer

Wilmington, DE · On-site

$120 - $180/hr

Responsibilities The Sr. AI Engineer is focused on building, testing, and operating AI-enabled ... Build Python services and microservices (APIs, workers) that expose AI capabilities; write clean ...

New

Berkley

Sr. AI Engineer

Wilmington, DE · On-site

$118K - $156K/yr

Responsibilities The Sr. AI Engineer is focused on building, testing, and operating AI-enabled ... Build Python services and microservices (APIs, workers) that expose AI capabilities; write clean ...

Berkley

Sr. AI Engineer

Wilmington, DE · On-site

$118K - $156K/yr

Responsibilities The Sr. AI Engineer is focused on building, testing, and operating AI-enabled ... Build Python services and microservices (APIs, workers) that expose AI capabilities; write clean ...

Berkley

Sr. AI Engineer

Wilmington, DE · On-site

$118K - $156K/yr

The Sr. AI Engineer is focused on building, testing, and operating AI-enabled features and services ... Build Python services and microservices (APIs, workers) that expose AI capabilities; write clean ...

FullStack Labs

Senior AWS DevOps Engineer - Remote - USA

Dover, DE · On-site +1

$129K - $166K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

The Position We're looking to hire a Senior AWS DevOps Engineer to join our team. You'll work with ... Familiar with scripting languages such as Python, Bash, or similar for automation. * Experience ...

The Chemours Company

Senior AI Engineer

Wilmington, DE · On-site +1

$101K - $139K/yr

  • Retirement

Chemours is seeking a Senior AI Engineer to join our growing AI & Data Science team. This is a ... Python), and deploying custom and complex GenAI solutions and multi-agent GenAI systems in ...

Best Egg

Lead Software Engineer II - Java & Python

Wilmington, DE · On-site

$100K - $135K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

You will work closely with senior engineers and architects to implement scalable, secure, and ... Strong backend development experience with Java and Python. * Solid understanding of SQL, data ...

Best Egg

Lead Software Engineer II - Java & Python

Wilmington, DE · On-site

$100K - $135K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

You will work closely with senior engineers and architects to implement scalable, secure, and ... Strong backend development experience with Java and Python. * Solid understanding of SQL, data ...

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 ... Strong programming experience in Java or Python * Hands-on expertise with AWS cloud services

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Showing results 21-40

All JobsPython Developer JobsSenior Python Developer JobsSenior Python Developer Jobs in Delaware

Senior Python Developer information

See Delaware salary details

$55K

$142.1K

$195.2K

How much do senior python developer jobs pay per year?

As of Aug 19, 2026, the average yearly pay for senior python developer in Delaware is $142,098.00, according to ZipRecruiter salary data. Most workers in this role earn between $121,600.00 and $163,600.00 per year, depending on experience, location, and employer.

What are the main responsibilities of a senior Python developer?

A Senior Python Developer is responsible for designing, developing, and maintaining complex software applications using the Python programming language. They lead the technical aspects of projects, mentor junior developers, and ensure code quality through code reviews and best practices. Additionally, they collaborate with cross-functional teams to gather requirements, solve technical challenges, and deploy scalable and efficient solutions. Senior Python Developers are also expected to stay updated with the latest trends and advancements in Python and related technologies.

What are the key skills and qualifications needed to thrive as a senior Python developer?

To thrive as a Senior Python Developer, you need advanced proficiency in Python programming, experience with software architecture, and a solid understanding of algorithms and data structures, usually backed by a degree in computer science or related fields. Familiarity with frameworks like Django or Flask, version control systems such as Git, and containerization tools like Docker are typically required, alongside knowledge of modern CI/CD pipelines. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with teams and mentor junior developers. Mastery of these skills ensures the delivery of scalable, maintainable software solutions and the ability to drive technical excellence within development teams.

What are some common challenges faced by senior Python developers when leading a development team?

Senior Python Developers often encounter challenges such as balancing hands-on coding with mentoring junior team members and ensuring code quality across the team. They are also responsible for making architectural decisions, which requires staying updated on best practices and emerging Python frameworks. Additionally, coordinating collaboration between cross-functional teams (like DevOps, QA, and front-end developers) can be complex, especially in agile environments where requirements may shift rapidly. Overcoming these challenges helps foster a productive and innovative team culture.

What is the difference between Senior Python Developer vs Python Developer?

AspectSenior Python DeveloperPython Developer
Required ExperienceTypically 5+ years, with leadership and complex project experienceUsually 1-3 years, focusing on core Python skills
ResponsibilitiesDesigning architecture, mentoring, handling complex systemsWriting code, debugging, implementing features
CertificationsOptional but beneficial (e.g., Python certifications, cloud certs)Often not required
Work EnvironmentCollaborative teams, project planning, code reviewsDevelopment-focused, task-oriented

The main difference between a Senior Python Developer and a Python Developer lies in experience, responsibilities, and leadership. Senior developers handle complex projects, mentor others, and often participate in architecture decisions, while Python Developers focus on coding and feature implementation. Both roles are essential in tech companies, but the senior role requires more experience and broader skills.

Are senior Python developers still in demand?

Senior Python developers remain in high demand due to the language's versatility in web development, data analysis, machine learning, and automation. Companies seek experienced developers with skills in frameworks like Django or Flask, and proficiency in cloud platforms and APIs enhances job prospects.

How much does a senior Python developer make?

A senior Python developer typically earns between $100,000 and $150,000 annually, depending on experience, location, and industry. They often possess strong skills in frameworks like Django or Flask and may hold certifications or advanced degrees that influence salary levels.

What does a senior Python developer do?

A senior Python developer designs, develops, and maintains complex software applications using Python. They often lead projects, review code, optimize performance, and collaborate with cross-functional teams, requiring strong problem-solving skills and knowledge of frameworks like Django or Flask. Additionally, they may mentor junior developers and ensure code quality through testing and best practices.

What are the most commonly searched types of Python Developer jobs in Delaware?

The most popular types of Python Developer jobs in Delaware are:

What are popular job titles related to Senior Python Developer jobs in Delaware?

For Senior Python Developer jobs in Delaware, the most frequently searched job titles are:

What job categories do people searching Senior Python Developer jobs in Delaware look for?

The top searched job categories for Senior Python Developer jobs in Delaware are:

What cities in Delaware are hiring for Senior Python Developer jobs?

Cities in Delaware with the most Senior Python Developer job openings:

What are popular job titles related to Senior Python Developer jobs in DE?

For Senior Python Developer jobs in DE, the most frequently searched job titles are:

Senior Python Developer jobs near you
Infographic showing various Senior Python Developer job openings in Delaware as of August 2026, with employment types broken down into 1% Internship, 84% Full Time, 9% Part Time, and 6% Contract. Highlights an 79% Physical, 6% Hybrid, and 15% Remote job distribution, with an average salary of $142,098 per year, or $68.3 per hour.

Lead Java Developer - Senior Vice President

Citigroup, Inc.

New Castle, DE • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 13 days ago

Citibank rating

8.3

Company rating: 8.3 out of 10

Based on 177 frontline employees who took The Breakroom Quiz

39th of 171 rated banks

Job description

Citi is hiring a Senior Java Engineer to lead the technical transformation of its global cheque payment platform - a critical infrastructure at the heart of high-volume financial transaction processing. In this senior engineering role within the Payments Platform organisation, you will combine deep hands-on coding in Java with platform strategy ownership, guiding a scrum team through the modernisation of core payment systems from legacy mainframe architectures to cloud-native microservices. This is a rare opportunity to architect and deliver at scale while embedding AI-driven practices into both the platform and the engineering workflow.
Responsibilities
  • Design and build production-grade Java microservices for a high-volume, low-latency cheque payment platform, authoring reusable frameworks, conducting architecture reviews, and setting the technical standard for the team.
  • Architect event-driven, fault-tolerant distributed systems using Apache Kafka - covering message schema design, topic partitioning, consumer group strategies, and exactly-once processing semantics.
  • Define and execute the engineering roadmap for modernising the cheque payment platform, migrating global components from monolithic mainframe applications to scalable, cloud-native microservices.
  • Own the platform's data architecture across Oracle, Microsoft SQL, and MongoDB - governing schema design, query optimisation, indexing strategies, and data consistency patterns across relational and NoSQL stores.
  • Drive AI-powered engineering quality across the team - integrating tools such as GitHub Copilot and LLMs (including Gemini) for automated test generation, vulnerability scanning, and enhanced payment processing accuracy.
  • Lead performance engineering for JVM-based applications - profiling hotspots, tuning garbage collection, optimising thread management, and improving critical settlement processing paths.
  • Own the security and compliance posture of the platform through threat modelling, vulnerability assessments, and secure design reviews, ensuring alignment to engineering excellence standards across CI/CD, DevOps, and cloud-native delivery.
  • Act as the primary engineering point of contact for the cheque processing pillar, communicating platform health, delivery progress, and engineering strategy to senior business and technology stakeholders.

Required qualifications & skills
  • Extensive hands-on Java engineering experience in high-throughput, production-grade environments, including JVM performance tuning, GC optimisation, and thread and memory profiling.
  • Proven ability to design and deliver microservices-based architectures using Spring Boot or Spring MVC, with hands-on expertise in RESTful API design, service decomposition, and inter-service communication patterns.
  • Deep practical knowledge of Apache Kafka, including topic design, partitioning strategies, consumer groups, exactly-once semantics, and high-throughput stream processing.
  • Hands-on expertise with Oracle SQL and MongoDB, covering schema design, query optimisation, indexing, aggregation pipelines, sharding, and replica set configuration.
  • Cloud-native engineering experience with OpenShift, AWS, Kubernetes, and Docker - including container orchestration, autoscaling, and cloud-native deployment practices.
  • Hands-on ownership of CI/CD pipelines using tools such as Jenkins, Gradle, and Maven, with experience in DevOps practices, observability tooling such as Grafana, and distributed tracing.
  • Demonstrated experience delivering at scale within Agile or SAFe frameworks, including PI planning, cross-team dependency management, and programme-level governance.

Beneficial skills & qualifications
  • Familiarity with real-time ML model serving, MLOps practices, RAG patterns, or agentic AI frameworks such as LangChain or AutoGen in an enterprise or regulated environment.
  • Experience leading large-scale legacy modernisation programmes - migrating mainframe components written in COBOL, Assembler, or C++ into cloud-native microservices.
  • Hands-on Python skills applied to data pipeline engineering, AI and ML integration, and workflow automation.
  • Knowledge of reconciliation and exception handling patterns within payment settlement workflows.
  • Experience with chaos engineering, fault injection, and production readiness reviews as part of a resilience testing practice.

What we offer
Joining Citi means taking ownership of engineering that operates at genuine global scale. This role offers the platform, the people, and the technical challenge to do your most impactful work - with the seniority and visibility to shape how payments engineering evolves at one of the world's leading financial institutions.
  • Technical leadership at scale, with end-to-end ownership of a mission-critical global payment platform and clear senior visibility across technology and business.
  • A hands-on engineering culture that values technical depth at every level of seniority - you will stay close to the code while driving platform strategy.
  • Access to cutting-edge tooling, cloud-native infrastructure, and AI-powered development practices as part of a major payments modernisation programme.
  • Hybrid working model with 3 days in the office and 2 days working remotely, offering flexibility alongside strong team collaboration.
  • Structured learning and development opportunities to deepen expertise in distributed systems, AI integration, and financial technology at enterprise scale.
  • Competitive financial wellbeing package, including salary, performance-based reward, and a comprehensive suite of employee benefits.
  • Access to wellbeing and family support programmes designed to help you perform at your best inside and outside of work.

Build the future of global payments engineering at Citi - apply today and bring your expertise to a platform that moves the world's money.
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:
Aug 14, 2026
Automated Processing and AI
We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.
Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.
Illinois residents - AI Notice and Right
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.

What Citibank employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

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About Citigroup Inc

Sourced by ZipRecruiter

We live in an increasingly complex world. Companies these days are either born global or are going global at record speed. Business and geopolitics are forging an entirely new dynamic and consumers now expect financial services to be a seamless part of their digital lives. Citi is a bank that’s uniquely positioned for this moment. Through our vast global network and our on-the-ground expertise, we can connect the dots, anticipate change and empathize the needs of our clients and customers in ways that other banks simply cannot. Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress. We have set expectations for how we must act to bring our mission to life. These expectations are at the heart of our Leadership Principles – we take ownership, we deliver with pride and we succeed together.

Industry

Banking and credit intermediation

Company size

5,001 - 10,000 Employees

Headquarters location

New York City, NY, US

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