1,000+ matching jobs for “Sr. Software Engineer”

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Exact titles rank first, then title variations and keywords in descriptions. These labels aren't qualification scores. Without keywords, recently added jobs appear first.

Carrier Global

Senior Software Engineer

PRT5208: Rua Rua Santos Dias No. 1121, Matosinhos, 4465-255, Portugal

Rol: Senior Software Engineer Location: Porto, Portugal Type of contract: Permanent Carrier is the leading worldwide provider of …

Added Oct 27, 2026

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Labcorp Holdings

Senior Software Engineer

Bloomfield CT

Full time
Regular

Design, develop, and support application‑level software for laboratory automation equipment, including liquid‑handling and instrument‑tending robotic systems. …

Added Oct 16, 2026

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Mastercard

… that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Overview We are the global technology company behind the world’s fastest payments processing …

Added Oct 30, 2026

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Fiserv

Senior Software Engineer

Sunnyvale, California, United States

Full time
Regular

Pay posted by employer$160,000–$240,000

Added Nov 3, 2026

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RTX

Senior Software Engineer

Gloucester, England, United Kingdom +1 location

Design and build software using industry best practice Collaborate with stakeholders and other engineers Contribute to the completion …

Added Oct 27, 2026

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Booz Allen Hamilton

Software Developer, Senior

Aberdeen Proving Ground, MD

Pay posted by employer$86,900–$198,000

Software Developer, Senior The Opportunity: As a software developer on our team, you will learn to develop and …

Added Oct 27, 2026

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Freddie Mac

Senior Software Engineer

McLean, Virginia, United States

Full time
Regular

Pay posted by employer$129,000–$193,000

… to a greater purpose. Position Overview: Join our Enterprise Business Technology team as a Senior Software Engineer , where you'll lead the development of Corporate Communications and Marketing technology …

Added Oct 15, 2026

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GE HealthCare Technologies

Senior Software Engineer

FIN03-01-Helsinki-Kuortaneenkatu 2

… every voice makes a difference, and every difference builds a healthier world. As an experienced Senior Software Engineer, you will define, develop, and maintain embedded product software as part of our sensor SW team. …

Added Oct 27, 2026

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Mastercard

Senior Software Engineer

O'Fallon, Missouri, United States

Pay posted by employer$115,000–$184,000 USD

Software Development • Design, build, test, deploy, and maintain software components, automation frameworks, and …

Added Oct 27, 2026

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Mastercard

Senior Software Engineer

O'Fallon, Missouri, United States

Pay posted by employer$115,000–$184,000 USD

… that power critical capabilities across the real-time payment network. This is an opportunity to work on software that operates at global scale, where speed, reliability, and resilience matter every day. As a Senior …

Added Oct 27, 2026

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Warner Bros. Discovery

Senior Software Engineer

Stockholm, Stockholm, Sweden

Full time
Regular

… of disciplines. We're always on the lookout for energetic, creative people to join our team. ㅤ Senior Software Engineer for Cluster Engineering Meet our team: The Direct to Consumer (DTC) Group is a technology company …

Added Oct 27, 2026

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Visa

Sr. Software Engineer

Singapore, Singapore

… global team responsible for the delivery of features in the Resolve Online program. We are seeking an Sr. Software Engineer to join the Visa Resolve Online (VROL) Engineering team. You will contribute to the development of …

Added Oct 27, 2026

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Lennar

Sr Software Engineer

Miami, Florida, United States

… Science, Engineering, or related field, or equivalent practical experience. 5+ years of professional software development experience, including ownership of production systems at scale. Expert-level proficiency in …

Added Oct 27, 2026

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Mastercard

Senior Software Engineer

O'Fallon, Missouri, United States

Pay posted by employer$115,000–$184,000 USD

•Design software solutions and contribute to software architecture decisions that support scalability, maintainability, and …

Added Oct 27, 2026

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KLA

Senior Software Engineer

Migdal Ha‘Emeq, Northern District, Israel

Full time
Regular

… high-impact work across your area of expertise. Preferred Qualifications KLA is seeking a talented Senior Software Engineer to join our semiconductor products development team in Israel. The candidate will participate in …

Added Oct 15, 2026

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Capital One Financial

Senior Software Engineer

London, England, United Kingdom

… learn with many great and diverse individuals. In this role, you will design, develop, test, and maintain software products that automate core business processes. You will walk in the shoes of our users, collaborating with …

Added Oct 27, 2026

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Northrop Grumman

Senior Software Engineer

United Kingdom-Manchester

… create within our communities. The Opportunity This is more than just a job; it’s a mission . As a Senior Software Engineer , you will design, develop and maintain the critical software that underpins our mission-led …

Added Nov 3, 2026

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Mastercard

Senior Software Engineer

Mexico City, Mexico

… mechanism into a cohesive, productized developer experience. - Drive the integration and enablement of software engineering tools across the development lifecycle, with a focus on usability and reliability. - Contribute …

Added Oct 27, 2026

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RTX

Senior Software Engineer

Gloucester, England, United Kingdom

Design and build software using industry best practice Collaborate with stakeholders and other engineers Contribute to the completion …

Added Oct 27, 2026

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KLA

Senior Software Engineer

Migdal Ha‘Emeq, Northern District, Israel

Full time
Regular

… of KLA’s metrology and inspection products, is looking for the best and the brightest research scientist, software engineers, application development engineers, and senior product technology process engineers. The Optical …

Added Oct 15, 2026

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Fiserv

Senior Software Engineer

Sunnyvale, California, United States

Full time
Regular

Pay posted by employer$160,000–$240,000

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About this opportunity

Original employer description

Calling all innovators - find your future at Fiserv.

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Senior Software Engineer

What does a successful Software Engineer - .NET do at Clover?

As a .NET Software Engineer at Clover, you will design, build, and maintain high-performance backend systems and RESTful APIs using C# and .NET 8. Working with complex multi-tenant database architectures and cloud-hosted environments, you will drive seamless integrations with third-party platforms while ensuring robust security, performance, and reliability across our applications.

What you will do:

Build high-performance RESTful Web APIs using C# and ASP.NET Core.
Support and maintain existing code written in legacy .NET Framework codebases.
Write, debug, and optimize complex raw SQL queries in MySQL and manage multi-tenant database architectures.
Develop and consume RESTful endpoints, process JSON payloads, and manage Webhook events and OAuth 2.0 authentication for third-party integrations.
Utilize Visual Studio, Git (Azure DevOps), Docker, and cloud-hosted environments (AWS / GCP) for development and deployment.

What you will need to have:

C# & .NET 8 / ASP.NET Core: Strong backend development skills for building high-performance RESTful Web APIs.
Legacy .NET Framework Familiarity: Comfort working with or supporting code written in legacy .NET Framework codebases.
Raw MySQL & Hand-Crafted SQL: Excellent proficiency in writing, debugging, and optimizing complex raw SQL queries without reliance on ORMs.
Multi-Tenant Architecture: Experience with multi-tenant database designs, tenant isolation strategies, and efficient connection handling.
REST APIs & Webhooks: Experience building and consuming RESTful endpoints, processing JSON payloads, and managing Webhook events for third-party integrations.
OAuth 2.0 & Authentication: Understanding of token management and securing external API communication.
IDE & Tooling: Proficiency in Visual Studio for backend development and debugging.
Git Version Control: Hands-on experience using Git within environments like Azure DevOps.
Docker & Basic Cloud Context: Experience using Docker for local development setup and familiarity working within cloud-hosted environments (AWS / GCP).

What would be great to have:

Java Background (Bonus): Exposure to Java backend technologies is a plus, as parts of the ecosystem may leverage Java in future iterations.
Experience with React and Typescript

Salary Range

$160,000.00 - $240,000.00

These pay ranges apply to employees in Sunnyvale, California. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company’s sole discretion.

Thank you for considering employment with Fiserv. Please:

Apply using your legal name
Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

Our commitment to Equal Opportunity:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.

If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact [email protected]. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv’s Disability Accommodation Policy for additional information.

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

Warning about fake job posts:

Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.

Why this result? · Employer labels

Related title wording

Full time
Regular
Tech - Software Engineering

Location reference: GeoNames (CC BY 4.0), normalized by Referizz.