Explore 3 senior python developer jobs from 3 hiring companies in Newcastle, TX, US. Filter by remote, salary, experience, and company, then open any listing to apply.

senior-python-developer

Senior Python Developer

Graham

Mineral Wells

Olney

Breckenridge

Jacksboro

Seymour

Archer City

Albany

Holliday

Throckmorton

Runaway Bay

Bryson

Lakeside City

Graford

Strawn

Palo Pinto

Senior Python Developer Jobs

Blackhawk Network

Fidelity Investments

Hybrid

Onsite

Remote

<h2></h2><h2>Job Description:</h2>We are looking for a new team member who can make an immediate impact and who demonstrates curiosity to learn, is willing to step up and take ownership of their projects and thrive by sharing knowledge. The Digital Asset Security Operations team within Fidelity Enterprise Cybersecurity (ECS) group provides cybersecurity security engineering and operational support for mission critical systems that provide cryptocurrency and blockchain related products and services. This role will interact with other members of the cybersecurity team as well as the Risk and Development team of our business partners. This role offers tremendous exposure to industry leading Cryptographic processes &amp; practices, hands-on exposure to Hardware Security Modules, exposure to Blockchain/Digital Currencies, and leading systems monitoring tools &amp; technologies. The Expertise You Have and The Skills You Bring  <ul><li>Bachelor&#39;s degree in computer science or equivalent technology discipline</li><li>6&#43; years of experience in a distributed IT Engineering and/or support function</li><li>2&#43; years of experience with implementing and supporting APIs, Key management &amp; Encryption products, and solutions.</li><li>1-2 years of experience with cloud computing (AWS/Kubernetes/Containerization)</li><li>Understanding of Cryptography/encryption concepts, methods, and processes.</li><li>Strong working knowledge of OS (Linux and Windows) from security point of view (configuration, hardening etc.).</li><li>Knowledge of deploying and managing APIs, and automation/scripting (Python/Bash, PowerShell, etc.).</li><li>Hands-on experience in CI/CD and configuration management systems such as Github, Jenkins and Artifactory</li><li>Hands on experience with Hardware Security Modules (HSM) for key management is highly desired.</li><li>Good system analysis and problem-solving skills.</li><li>Understanding of Agile methodology and ability to work in a fast-paced Enterprise environment is desired.</li></ul>The Value You Deliver <ul><li>You will be part of a highly talented Cybersecurity Dev/Ops team that designs, builds, and supports critical solutions for Fidelity cryptocurrency infrastructure.</li><li>Performing routine tasks of Incident, change and release management work in on-going operations support including source code control, build and deployment automation, configuration and change management, performing monitoring and log integration, server and network security access control for cryptocurrency projects.</li><li>Performing systems security engineering work including designing/recommending new controls implementations, executing proof of concepts, researching new solutions for emerging threats and developing process improvements to improve cybersecurity controls</li><li>Defining, implementing, and supporting authentication, authorization, monitoring, policy enforcement, access control and other security controls at server, system, network, and process levels for the production systems in cryptocurrency environment</li></ul><h2></h2><h2>Certifications:</h2><h2></h2><h2>Category:</h2><h2></h2>Information TechnologyMost roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles.Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.

Senior Systems Engineer (Cybersecurity)

Senior Systems Engineer

6+ years distributed IT engineering/support; 2+ years API, key management, encryption; 1-2 years cloud (AWS/Kubernetes); strong OS security knowledge; scripting (Python/Bash/PowerShell); CI/CD and tools (GitHub, Jenkins, Artifactory); HSM experience preferred.

For decades, DTN has been the silent force behind some of the world’s most critical industries—helping businesses navigate complexity, uncertainty, and risk with smarter, faster decisions. From agriculture to energy to weather intelligence, our proprietary Operational Decisioning Platform transforms raw data into decision-grade insights—enabling companies to optimize supply chains, ensure market stability, and safeguard infrastructure against disruption. We don’t follow trends—we set the standard for precision, trust, and operational impact. DTN is at an exciting inflection point. Building off a foundation of financial strength, profitability, and industry trust, we’re accelerating growth and expanding our global footprint. Our purpose-built solutions—powered by AI and honed by decades of vertical expertise—are helping some of the world’s most significant enterprises thrive amid operational constraints and uncover new opportunities in a fast-changing world.Job Description:Position Summary DTN is seeking a Senior Full Stack Engineer, Digital Experience to help modernize and evolve dtn.com into a faster, more scalable, and high-performing digital platform. This role will focus on improving DTN’s public web experience, supporting brand storytelling, solution marketing, content delivery, and lead generation.You will work across front-end and back-end systems to enhance site architecture, performance, accessibility, analytics, and integrations. This role partners closely with Marketing, Design, Content, and Demand Generation teams to deliver a best-in-class digital experience that reflects DTN’s market leadership and supports business growth.What You Will Be Responsible For<ul><li>Lead the technical evolution of dtn.com, improving architecture, scalability, and maintainability</li><li>Build and maintain responsive, accessible, high-quality front-end experiences across key pages and conversion paths</li><li>Develop and support back-end services, APIs, and integrations powering content, forms, search, and personalization</li><li>Partner with Marketing and Content teams to create reusable templates, modular components, and publishing workflows</li><li>Improve site performance, Core Web Vitals, accessibility standards, and technical SEO</li><li>Integrate the website with business systems including CMS, CRM, marketing automation, analytics, and consent tools</li><li>Build and optimize form flows, lead capture experiences, and content journeys to support demand generation</li><li>Establish engineering best practices including code quality, testing, observability, and release processes</li><li>Contribute to and help scale a design system and component library for the web platform</li><li>Use data and experimentation to drive improvements in engagement, conversion, and usability</li><li>Troubleshoot production issues and continuously improve platform reliability</li></ul>What You Will Bring to the Position<ul><li>Bachelor’s degree in Computer Science, Software Engineering, or related field, or equivalent practical experience</li><li>7&#43; years of software engineering experience, including experience building and supporting public-facing websites or digital platforms</li><li>Strong front-end development skills (JavaScript/TypeScript, HTML, CSS) with experience in modern frameworks such as React, Next.js, or Vue</li><li>Back-end development experience building APIs, services, and integrations (Node.js, Python, Java, or similar)</li><li>Experience working with CMS platforms, ideally modern or headless architectures</li><li>Strong understanding of website architecture, component-driven development, and content-driven experiences</li><li>Experience with performance optimization, accessibility standards, responsive design, and technical SEO</li><li>Experience integrating websites with analytics tools, CRM systems, marketing automation platforms, and other third-party tools</li><li>Familiarity with cloud infrastructure, CI/CD pipelines, version control, and modern deployment practices</li><li>Strong collaboration skills and ability to partner effectively with cross-functional stakeholders</li><li>Ownership mindset with a focus on delivering measurable business outcomes</li></ul>What Will Make You Stand Out<ul><li>Experience modernizing or replatforming websites into scalable, modular architectures</li><li>Experience with headless CMS, design systems, and component libraries</li><li>Experience supporting B2B websites with complex solution portfolios and lead generation goals</li><li>Familiarity with A/B testing, personalization, SEO tooling, and digital analytics</li><li>Experience with structured content, taxonomy, and resource/content hubs</li><li>Exposure to privacy, consent, and governance requirements for global websites</li><li>Experience working in industries such as energy, agriculture, weather, logistics, or industrial technology</li><li>Experience with CMS platforms such as WordPress or Statamic</li></ul>What You Can Expect from DTN<ul><li>Competitive Salary</li><li>Unlimited PTO</li><li>Flexible working hours</li><li>Remote work model (position dependent)</li><li>Competitive Medical, Dental and Vision Insurance Plans</li><li>6% 401K matching</li><li>Unlimited access to 13k&#43; courses via learning platform to support employee career advancement</li><li>Employee Assistance Program (EAP)</li></ul>Compensation The targeted hiring base pay range for this position is between $109,500 and $145,500. DTN is a pay for performance organization, which means there is the opportunity to advance your compensation with performance over time. The actual base pay offered for this position will be dependent upon many factors, including but not limited to: prior work experience, training/education, transferable skills, business needs, internal equity and applicable laws. The targeted hiring base pay range is subject to change and may be modified in the future. This role may also be eligible for market competitive variable pay and benefits.#LI-REMOTE #LI-TH1About DTN:DTN is a global data and technology company helping operational leaders in energy, agriculture, and weather-driven industries make faster, smarter decisions. Our Operational Decisioning Platform turns complex data into decision-grade insights—empowering customers to expand their margins, accelerate growth, and outpace risk. With more than 1,200 employees globally, DTN serves the companies that feed, fuel, and protect the world. At DTN, we value clarity, trust, and action. We’re a team of problem-solvers, outcome-drivers, and industry nerds who believe that precision matters – and that mission is at the core of what we do.<ul><li>Trust Built: We earn it. We keep it. We protect it. Our neutrality, precision, and integrity are non-negotiable.</li><li>Confidence-Driven: We help customers move with clarity and conviction. We bring the data and operational knowledge leaders need to act.</li><li>Built for Industry: We speak operations because we come from operations. Our expertise is forged in fuel terminals, fields, flight paths, and forecasts.</li><li>Future-Forward: We see what’s coming- and we’re ready. We help customers lead through change with smarter decisioning.</li></ul>Recruitment Fraud Notice:DTN is aware of incidents where external parties have impersonated our organization, issuing fraudulent communications and/or job offers. Please be advised that all legitimate communication from DTN will come from an official &#64;dtn.com email address or through our Paradox AI automated scheduling platform (Talent IQ). Any offers are extended directly by our Talent Acquisition team following a formal interview process. If you receive a suspicious message or offer claiming to be from DTN, please do not engage. Contact our Talent Acquisition team at <a href="mailto:Careers&#64;DTN.com" target="_blank">Careers&#64;dtn.com</a> to verify the legitimacy of any communication. Report any fraudulent messaging as phishing or spam.DTN is an Equal Opportunity Employer. We welcome and encourage applicants of all backgrounds, including minorities, women, veterans, and individuals with disabilities.

Senior Full Stack Engineer, Digital Experience

Full Stack Engineer

7+ years software engineering; front-end (JavaScript/TypeScript, React/Next.js/Vue); back-end (Node.js, Python, Java); CMS and headless architectures; cloud, CI/CD; analytics and integrations; collaboration with cross-functional teams.

About Blackhawk Network:
Today, through BHN’s single global platform, businesses of all kinds can tap into the world’s largest network of branded payment solutions. BHN helps businesses grow revenue, increase loyalty, motivate and reward their teams, disburse funds and engage consumers. Branded payment solutions include the issuance and distribution of gift cards, egifts, corporate payouts and rewards, along with the technology to deliver these products in seamless, integrated ways. BHN’s network spans the globe with more than 400,000 consumer touchpoints. Learn more at BHN.com.

Overview:
We’re hiring a Sr Staff Product Security Engineer / Pen Tester to help defend our fintech platform against large-scale payment fraud, carding attacks, and other financially motivated threats. You’ll lead offensive security assessments targeting our transaction systems, authentication flows, and APIs — with a heavy focus on automation and scalability. Your work will directly impact our fraud defenses, detection strategy, and customer trust.This is a highly technical, hands-on role for someone who thrives in a fast-paced, high-stakes fintech environment.

Responsibilities:
<ul><li>Lead penetration testing engagements focused on payment abuse, transaction manipulation, and business logic exploitation.</li><li style="color: black; margin-bottom: 0in;">Design and execute automated attack simulations to test our defenses against:<ul style="margin-top: 0in;"><li style="color: black; margin-bottom: 0in;">Carding and BIN attacks</li><li style="color: black; margin-bottom: 0in;">Credential stuffing and account takeovers</li><li style="color: black; margin-bottom: 0in;">Checkout and payment flow abuse</li><li style="color: black; margin-bottom: 0in;">API-level enumeration and fraud</li></ul></li><li style="color: black; margin-bottom: 0in;">Build custom tooling and frameworks to mimic the behavior of real-world fraudsters and cybercriminals.</li><li style="color: black; margin-bottom: 0in;">Partner with fraud engineering, product security, and risk teams to identify weak points in our controls, detection systems, and architecture.</li><li style="color: black; margin-bottom: 0in;">Conduct threat modeling and red teaming exercises related to payments, authentication, and user account abuse.</li><li style="color: black; margin-bottom: 0in;">Document findings in technical reports with clear risk impact, exploitability, and remediation guidance.</li><li style="color: black; margin-bottom: 0in;">Mentor junior testers and contribute to a culture of security innovation and continuous improvement.</li></ul>

Qualifications:
<ul style="margin-top: 0in;"><li style="color: black; margin-bottom: 0in;">8+ years of experience in offensive security, penetration testing, or red teaming.</li><li style="color: black; margin-bottom: 0in;">Strong background in payment systems, financial fraud tactics, and transaction-level attack surfaces.</li><li style="color: black; margin-bottom: 0in;">Fluency in scripting and automation (e.g., Python, JavaScript, Go, Bash) to simulate attacker workflows at scale.</li><li style="color: black; margin-bottom: 0in;">Familiarity with tools like Burp Suite Pro, Selenium, Scapy, ffuf, SQLMap, Metasploit, and bot automation frameworks.</li><li style="color: black; margin-bottom: 0in;">In-depth knowledge of fintech technologies (e.g., tokenized payments, card vaulting, 3DS, ACH, real-time payment APIs).</li><li style="color: black; margin-bottom: 0in;">Solid grasp of common attacker techniques: carding, fake identity generation, bypassing rate limits, evading fraud filters, and abusing web/app logic.</li><li style="color: black; margin-bottom: 0in;">Strong communication skills for explaining findings to both technical and non-technical audiences.</li><li style="color: black; margin-bottom: 0in;">Certifications: OSCP, OSEP, GWAPT, GPEN, GCPN, GXPN, GX-PT, CPSA/CRSA by CREST, CHECK, or TIGER.</li><li style="color: black; margin-bottom: 0in;">Prior experience in a fintech, digital banking, or payment gateway environment.</li><li style="color: black; margin-bottom: 0in;">Familiarity with OWASP Automated Threats, PCI DSS, MITRE ATT&CK for Financial Services, or fraud detection systems.</li><li style="color: black; margin-bottom: 0in;">Experience building or testing real-time risk scoring engines and fraud defense pipelines.</li></ul>We seek candidates who not only demonstrate curiosity and adaptability in emerging technologies but have also successfully implemented and utilized AI tools to enhance their work, improve processes, or deliver measurable results.  Our teams embrace continuous learning and the thoughtful integration of AI to create meaningful impact – for our employees and the future of work.

Benefits:
Pay is based on several factors including but not limited to education, work experience, certifications, etc. In addition to your salary, Blackhawk Network offers benefits including 401k with employer match, medical, dental, vision, 12 paid holidays throughout the year 2026, sick pay accrual according to state law, parental leave, life insurance, disability insurance, accident and illness insurance, health and dependent care flexible spending accounts, wellness benefits, and flexible time off for all full-time employees. 

EEO Statement:
Blackhawk Network provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.  Blackhawk Network believes that diversity leads to strength. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. Blackhawk Network encourages applicants with previous criminal records to apply to all positions and, pursuant to the San Francisco and Los Angeles Fair Chance Acts (and other “Fair Chance” laws), Blackhawk Network will consider for employment qualified applicants with arrest and conviction records.  For Philadelphia applicants or jobs, please see a copy of Philadelphia’s ordinance on this topic by clicking this link: <a href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcodelibrary.amlegal.com%2Fcodes%2Fphiladelphia%2Flatest%2Fphiladelphia_pa%2F0-0-0-280104&data=05%7C01%7CDanielle.Donnelly%40bhnetwork.com%7Ceb6fc500f7b942baf8e208daeee67ac4%7C09f55992c50c45628657b1bd6acc36c5%7C0%7C0%7C638084970930872351%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=MkHeXbJtIsI0YEFlKXF6tNK98LyQxixqY%2BUDNdPxE2Y%3D&reserved=0" target="_blank" style="color: #000000;" rel="noopener">https://codelibrary.amlegal.com/codes/philadelphia/latest/philadelphia_pa/0-0-0-280104</a>.

Sr. Staff Product Security Engineer

Senior Staff Product Security Engineer

8+ years offensive security including penetration testing/red teaming; fintech and payments experience; scripting/automation; security tooling proficiency; strong communication; relevant certifications.

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Senior Python Developer Jobs in Newcastle, TX, US

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