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

python-blockchain-developer

Python Blockchain Developer

Denton

Sherman

Frisco

Plano

McKinney

Little Elm

Corinth

Prosper

Lewisville

Denison

Sanger

Ardmore

Highland Village

The Colony

Flower Mound

Allen

Carrollton

Coppell

Grapevine

Python Blockchain Developer Jobs

Fidelity Investments

JPMorgan Chase

Samsung Electronics

Hybrid

Onsite

Take on a crucial role where you'll be a key part of a high-performing team delivering secure software solutions. Make a real impact as you help shape the future of software security at one of the world's largest and most influential companies.As a Lead Security Engineer at JPMorgan Chase within the CTC Emerging Technologies Security group, you will design, build, and operate an enterprise-grade Digital Asset Custody and Wallet Orchestration Platform. In this role, you will be at the forefront of institutional blockchain infrastructure, responsible for building secure, scalable, and compliant wallet services that power our digital asset operations across multiple blockchain networks.&nbsp; You will work at the intersection of distributed systems engineering, cryptographic security, and financial services technology — building the foundational infrastructure that enables secure key management, programmable transaction policies, and seamless multi-chain wallet capabilities. This is a hands-on engineering role requiring knowledge of blockchain protocols, cloud-native development, and enterprise security practices.&nbsp;Job Responsibilities<ul style="list-style-type: disc;"><li>Design, architect, and develop a production-grade digital asset custody &amp; wallet orchestration platform by integrating with wallet infra platforms leveraging their APIs and SDKs for wallet provisioning, key management, and transaction orchestration</li><li>Implement secure key management workflows using Multi-Party Computation (MPC) and distributed key generation, ensuring no single point of failure</li><li>Build and configure programmable transaction policy engines, including multi-approval workflows, spending thresholds, velocity limits and role-based access controls</li><li>Develop multi-chain wallet capabilities supporting blockchain networks such as Ethereum, Bitcoin, Solana, and Polygon through unified API abstractions</li><li>Manage the full blockchain transaction lifecycle, including transaction construction, fee estimation, payload signing, broadcast, confirmation tracking, and idempotent retry logic for failed or stuck transactions</li><li>Design event-driven and webhook-based architectures to process real-time blockchain notifications such as transaction confirmations, smart contract events</li><li>Build secure RESTful APIs and microservices that expose wallet functionality to internal consumers, applying OAuth 2.0, JWT-based authentication, API gateway patterns</li><li>Develop and maintain integrations with compliance and risk systems, including transaction monitoring and comprehensive audit trail generation</li><li>Implement robust observability across the wallet service stack, including distributed tracing, structured logging, alerting, and dashboarding using tools such as Datadog, Dynatrace, and Splunk</li><li>Architect the wallet service for high availability, disaster recovery, and horizontal scalability using container orchestration on AWS (EKS/ECS), infrastructure-as-code (Terraform), and cloud-native resilience patterns</li><li>Collaborate with product managers, security teams, and business stakeholders to translate regulatory and business requirements into technical designs and delivery milestones</li><li>Add to team culture of diversity, opportunity, inclusion, and respect</li></ul>&nbsp;<hr>&nbsp;Required Qualifications, Capabilities, and Skills<ul style="list-style-type: disc;"><li>Bachelor's degree in Computer Science, Software Engineering, or a related field, with 7+ years of software development experience, including at least 2 years working with blockchain technologies or digital asset platforms</li><li>Strong proficiency in Java/J2EE and/or Python, with hands-on experience building production microservices using frameworks such as Spring Boot, Flask, or FastAPI</li><li>Solid understanding of blockchain fundamentals, including transaction models, consensus mechanisms, smart contract interaction (EVM-based and non-EVM), gas and fee management, and block finality across major networks</li><li>Working knowledge of cryptographic primitives and protocols relevant to digital asset custody, including Multi-Party Computation (MPC), threshold signatures (TSS), distributed key generation (DKG), elliptic curve cryptography (ECDSA, EdDSA), and HD wallet derivation paths (BIP-32/BIP-44)</li><li>Experience designing and implementing policy engines or rule-based authorization frameworks for financial transaction workflows, including multi-signature schemes, approval chains, and configurable spending controls</li><li>Proficiency with cloud infrastructure on AWS, including EC2, EKS, Lambda, S3, RDS, IAM, SQS, SNS, API Gateway, and KMS, with experience using Terraform or CloudFormation for infrastructure-as-code</li><li>Strong experience with containerization and orchestration using Docker and Kubernetes, including deployment pipelines, and auto-scaling configurations</li><li>Experience designing and consuming RESTful APIs, with deep understanding of OAuth 2.0, JWT, TLS/mTLS, certificate management, and API security best practices</li><li>Familiarity with event-driven architectures, webhook processing, and asynchronous messaging patterns for handling real-time blockchain state changes and notifications</li><li>Experience with relational (Oracle, PostgreSQL) and NoSQL (DynamoDB, MongoDB, Redis) databases, including schema design, query optimization, and data consistency patterns for financial systems</li><li>Proficiency with observability and monitoring tools such as Datadog, Dynatrace, Splunk, Grafana, or Prometheus for distributed tracing, log aggregation, and performance monitoring</li><li>Solid understanding of agile development methodologies, CI/CD pipelines (Jenkins, GitHub Actions, Spinnaker), and DevOps practices in a large enterprise environment</li></ul>&nbsp;<hr>&nbsp;Preferred Qualifications<ul style="list-style-type: disc;"><li>Experience building or operating digital asset custody solutions in a regulated financial institution</li><li style="background-color: white; margin-bottom: 6pt;">Experience using AI-assisted development tools (e.g., GitHub Copilot, Claude Code ) to accelerate development and test generation</li></ul>#CTC<h3>About Company</h3><div>Our professionals in our Corporate Functions cover a diverse range of areas from finance and risk to human resources and marketing. Our corporate teams are an essential part of our company, ensuring that we’re setting our businesses, clients, customers and employees up for success.</div><h2>Company</h2><div><div>
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 JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management.
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 We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process.&nbsp;
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 We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our&nbsp;<a href="https://careers.jpmorgan.com/us/en/how-we-hire/faqs" target="_blank" rel="nofollow">FAQs</a>&nbsp;for more information about requesting an accommodation.
 JPMorgan Chase &amp; Co. is an Equal Opportunity Employer, including Disability/Veterans
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Lead Security Engineer — Blockchain

Security Engineer

7+ years software development, with 2+ years blockchain; strong Java/Python; AWS and Kubernetes; cryptography knowledge; policy engines; REST APIs; observability tools.

<h2></h2><h2>Job Description:</h2>The RoleAs a Principal Software Engineer on the DeFi Yield Gen Platform team, you’ll get the opportunity to develop your skills and collaborate with engineers across Fidelity in a fun and dynamic environment. You will work closely with technical leaders and Architects to build a secure crypto yield generation platform utilizing modern software development practices. As a senior member of the team, you will mentor engineers on the best practices for Software development.The Expertise and Skills You Bring<ul><li>Bachelor&#39;s degree in computer science or related field required</li><li>8&#43; years&#39; of progressive experience in software engineering using programming languages like RUST</li><li>Hands-on experience building resilient services in RUST</li><li>Proficient in databases and SQL</li><li>Familiarity with L1 &amp; L2 blockchains such as Ethereum, is a plus</li><li>An understanding of microservice architecture</li><li>Ability to build reliable software that can withstand unreliable environments</li><li>Experience building unit and integration tests</li><li>Experience building and deploying applications using continuous integration pipelines and automated deployment tools such as Jenkins Core</li><li>Possess critical thinking skills to build end-to-end solutions</li><li>Passionate and committed to learning new things and developing with the latest technologies and frameworks</li><li>Work well in both a small agile team and independently, having a strong user focus</li><li>Strong analytical and communication skills and the ability to handle multiple tasks at any given time</li><li>Participate in engineering practices such as code and design reviews, environment strategy, and build and deployment pipelines</li><li>Strong organization skills and attention to details</li><li>Experience with AWS or other cloud platforms and containerization technologies such as Docker is a plus</li><li>Experience with asynchronous workers and resilient messaging services such as SNS and SQS is a plus</li></ul>The TeamFidelity Digital Assets®, a Fidelity Investments Company, is developing a full-service enterprise-grade platform for storing, trading, and servicing digital assets, such as Bitcoin and Ethereum.Fidelity Digital Assets® embraces an entrepreneurial culture and startup mindset while serving as one of the most innovative business units within Fidelity Investments. Our global, diverse team of hundreds of forward-thinking professionals lead with agility and creativity to build solutions that bridge the gap between traditional institutional investors and their exposure to digital assets. The firm’s tenure and experience across multiple business lines present our employees with unprecedented access to knowledge, technology, and resources that help our team reshape the future of finance. Within Fidelity Digital Assets®, the DeFi Yield Gen Team is responsible for the frontend, backend services and APIs that support DeFi Yield Generation Platform.The base salary range for this position is $107,000-216,000 USD per year.  Placement in the range will vary based on job responsibilities and scope, geographic location, candidate’s relevant experience, and other factors.Base salary is only part of the total compensation package. Depending on the position and eligibility requirements, the offer package may also include bonus or other variable compensation.   We offer a wide range of <a target="_blank" href="https://jobs.fidelity.com/benefits/">benefits</a> to meet your evolving needs and help you live your best life at work and at home.  These benefits include comprehensive health care coverage and emotional well-being support, market-leading retirement, generous paid time off and parental leave, charitable giving employee match program, and educational assistance including student loan repayment, tuition reimbursement, and learning resources to develop your career.  Note, the application window closes when the position is filled or unposted.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.Most 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 consult with your recruiter for the specific expectations for this position.<h2></h2><h2>Certifications:</h2><h2></h2><h2>Category:</h2><h2></h2>Information Technology

Principal Software Engineer (RUST/Python)

Front-End Engineer

8+ years in software engineering; strong front-end skills with React; experience with microservices, SQL, cloud, CI/CD; knowledge of blockchain technologies a plus.

Position SummaryMULTIPLE POSITIONS AVAILABLE Company: 	SAMSUNG ELECTRONICS AMERICA, INC.	 Position Title: 	Associate III, Software Quality Assurance Location: 	Plano, TX Job ID:		SAM9500619 Position Responsibilities: Developing and implementing comprehensive test plans and test cases for crypto currency for Samsung handset end users. Leading blockchain QA testing and issue management on a global level by collaborating with HQ, R&amp;D, and other global posts. Developing and implementing test management for US/KR/EU samples for Blockchain keystore and Blockchain wallet application testing. Testing and improving the quality of Samsung Wallet features, particularly for the Blockchain Crypto Wallet. Researching Coin / Tokens network to implement test plans and case efficiency. Reviewing UX/UI documents to enhance test plans and test cases. Creating and managing a personal test account for actual Crypto transactions. Implementing rigorous and thorough monitoring and testing practices to meet security and performance requirements. Designing and implementing blockchain supporting tools and utilities, including tools for exploring the blockchain, monitoring, benchmarking or debugging tools. Leveraging critical thinking and problem-solving skills to diagnose and resolve complex issues that arise.Role and ResponsibilitiesPosition Requirements:Bachelor&#39;s degree or foreign equivalent degree in Computer Science, Mathematics, Engineering, or a related field and one year of experience in the job offered or another related occupation. Must have one year of experience in the following skills: (1) creating cryptocurrency test cases from scratch; (2) performing test cases of mobile wallet; (3) using Python, Java, Android to create automation test cases; (4) quality assurance processes including test case planning, feature ownership, automation tool management, bug reporting, and regression; (5) analyzing market issues and categorizing data cases using SQL and Tableau; (6) project management skills with carrier schedule VZW, ATT, and TMB; and (7) experience in quality assurance on mobile testing, blockchain technology, and mobile payment. Partial telecommuting permitted; employees will be required to report to office multiple days per week.Hours: Full Time, 40 hours/week.              Skills and Qualifications#LI-DNI* Please visit <a href="https://account.samsung.com/membership/pp" target="_blank">Samsung membership</a> to see Privacy Policy, which defaults according to your location. You can change Country/Language at the bottom of the page. If you are European Economic Resident, please click <a href="http://ghrp.europe-samsung.com/PrivacyNoticeforEU.html" target="_blank">here</a>.At Samsung, we believe that innovation and growth are driven by an inclusive culture and a diverse workforce. We aim to create a global team where everyone belongs and has equal opportunities, inspiring our talent to be their true selves. Together, we are building a better tomorrow for our customers, partners, and communities.* Samsung Electronics America, Inc. and its subsidiaries are committed to employing a diverse workforce, and  provide Equal Employment Opportunity for all individuals regardless of race, color, religion, gender, age, national origin, marital status, sexual orientation, gender identity, status as a protected veteran, genetic information, status as a qualified individual with a disability, or any other characteristic protected by law.Reasonable Accommodations for Qualified Individuals with Disabilities During the Application ProcessSamsung Electronics America is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application process. If you have a disability and require a reasonable accommodation in order to participate in the application process, please contact our Reasonable Accommodation Team (855-557-3247) or SEA_Accommodations_Ext&#64;sea.samsung.com for assistance. This number is for accommodation requests only and is not intended for general employment inquiries.

Associate III, Software Quality Assurance

Bachelor's degree in CS/Math/Engineering plus 1 year in cryptocurrency test cases, mobile wallet testing, Python/Java/Android automation, QA processes, SQL/Tableau, project management, and mobile blockchain/ payments experience; partial telecommuting; full-time.

Python Blockchain Developer Jobs in Gainesville, TX, US | HiringCafe: every job on earth

Python Blockchain Developer Jobs in Gainesville, TX, US

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