Jobs in the United States

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Added 5 hours ago
Software Engineering Intern (Summer 2027)
RTX
United States
Our team has a need for a Software Engineer who is inspired by a job that challenges them to be proactive, make decisions, and generate ideas that drive product development to greater…
Added 5 hours ago
Operations Quality Engineer
RTX
United States
…businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and…
Added 5 hours ago
Principal Electro-Optical Integration & Test Engineer
RTX
United States
The Effectors Optics Department is seeking a Principal Electro-Optical Integration & Test Engineer to join a multidisciplinary team supporting development, qualification, and production of…
Added 5 hours ago
Program Supplier Quality Engineer - 50% travel
RTX
Remote, United States
…businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and…
Added 5 hours ago
F135 Technical Data Customer Support Engineer (Onsite)
RTX
United States
The F135 engine program is seeking a Customer Support Engineer (CSE) to support the development and maintenance of F135 Joint Technical Data (JTD) engine manuals. In this role, you will…
Added 5 hours ago
Senior Systems Engineer - MANTA SEIT (Onsite)
RTX
United States
Join our MANTA SEIT Department as a Senior Systems Engineer, where you will play a critical role in supporting the development, integration, and validation of resilient navigation systems.…
Added 5 hours ago
F135 Technical Data Customer Support Engineer (Onsite)
RTX
United States
The F135 engine program is seeking a Customer Support Engineer (CSE) to support the development and maintenance of F135 Joint Technical Data (JTD) engine manuals. In this role, you will…
Added 5 hours ago
Senior Systems Engineer, Network Architecture & Infrastructure Protection (Onsite)
RTX
United States
As a Senior Systems Engineer within Strategic Defense Solutions (SDS), you will apply your technical expertise to the development of advanced Strategic Nuclear Deterrence capabilities,…
Added 5 hours ago
Senior Quality Engineer - Semiconductors
RTX
United States
…businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and…
Added 5 hours ago
Manufacturing Engineer II - Chemical Oxygen Generator (Onsite)
RTX
United States
…businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and…
Added 5 hours ago
Deputy Chief Engineer
RTX
United States
The Secure Subsystems Engineering team seeks a Deputy Chief Engineer. The Secure Subsystems Department is responsible for the design, test, and certification of cross-domain technologies…
Added 5 hours ago
Nozzle Aero-Thermal Fluids, Sr. Engineer (Onsite)
RTX
United States
…businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and…
Added 5 hours ago
Principal Agile Release Train Engineer (HYBRID)
RTX
United States
Collins Aerospace is seeking a Principal Agile Release Train Engineer (RTE) / Solution Train Engineer (STE) to lead Agile Release Trains and coordinate multi-train integration efforts…
Added 5 hours ago
K
ELSUR Collection Systems Database Engineer Mid
Kforce
McLean, VA
- $88 to $112 USD / hour
We are seeking an experienced Database Engineer to support mission-critical ELSUR collection systems. This position is responsible for maintaining and supporting database environments…
Added 5 hours ago
Equipment Engineering Technician: Night Shift
Coherent Corp. US
Sherman, TX
Practical knowledge and application of electronics, mechanics, vacuum theory, math, computers, and Testing.
Added 5 hours ago
Data Engineer
KBR Wyle Services, LLC
Beavercreek, OH
KBR is seeking a Senior Data Engineer (Lakehouse & Application Development) to design, develop, and optimize modern data platforms and web-based applications supporting Department of…
Added 5 hours ago
Machinist - Entry Level
Real Time Consulting, LLC
Phoenix, AZ
JOB TITLE: Software Engineer - Avionics Data Network
Added 5 hours ago
Software Engineer - Aircraft Surveillance Systems
Real Time Consulting, LLC
Phoenix, AZ
Knowledge of DO-178 Full Lifecycle Development process and its application in the development of complex systems software
Added 5 hours ago
Full Stack Sofware Engineer
Simplex
Austin, TX
Our client is seeking a Full Stack Software Engineer who combines strong technical fundamentals with thoughtful product judgment. You’ll own features from initial problem definition through…
Added 5 hours ago
Cloud Engineer
Worldlink
Remote - MST
software development to cloud hosting, from big data
Added 5 hours ago
Software Engineer II
USA-Medtronic MiniMed, Inc 1017
Northridge, CA
We are seeking for a skilled and motivated Software Embedded Engineer to join our dynamic team. The ideal candidate will have a strong background in embedded systems and software…
Added 5 hours ago
Senior Software Engineer
USA-Medtronic MiniMed, Inc 1017
Northridge, CA
We are seeking for a skilled and motivated Senior Software Embedded Engineer to join our dynamic team. The ideal candidate will have a strong background in embedded systems and software…
Added 5 hours ago
Battery Algorithm ML Engineer
Apple
Cupertino, CA
The BMS team is looking for battery algorithm software engineer to design and develop advanced battery and power management algorithms and software for various Apple products. Working with…
Added 5 hours ago
Wireless Design Verification Engineer
Apple
San Diego, CA · Sunnyvale, CA
…concept through production. As a Wireless Radio Verification Engineer, you'll ensure first-time-right silicon success through sophisticated testbenches, comprehensive scenarios, and…
Added 5 hours ago
Staff Software Development Engineer
CVS Shared Services Resources LLC
Remote, United States
The Staff Software Development Engineer designs, develops, and implements digital solutions and systems by applying advanced technical expertise to architect and code software applications,…

Simplex

Full Stack Sofware Engineer

Austin, TX, United States

Base salary of $220,000–$280,000, depending on experience, skills, and scope of responsibility.

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Job details

Pay: Base salary of $220,000–$280,000, depending on experience, skills, and scope of responsibility.
Posting language: English
Posted: Nov 3, 2026

Original job description

This role is in-office M-F in the Flatiron District, NYC, NY. Our client is a technology company building software that helps independent retailers manage and grow their businesses. Its platform connects essential retail operations, including checkout, payments, inventory, online sales, and back-office workflows, with AI-powered capabilities. The engineering team works together in person in New York City, releases improvements frequently, and partners directly with business owners to understand how the product performs in day-to-day operations. About the Role Our client is seeking a Full Stack Software Engineer who combines strong technical fundamentals with thoughtful product judgment. You’ll own features from initial problem definition through production, building intuitive user experiences backed by reliable APIs, data models, and infrastructure. This role offers substantial ownership across customer-facing products and shared engineering foundations. You’ll collaborate with product partners, customers, and fellow engineers to identify problems, evaluate tradeoffs, and deliver practical solutions. The core technology stack includes TypeScript, React, Next.js, tRPC, Prisma, and PostgreSQL. What You’ll Do

Build and deliver full-stack features spanning React interfaces, backend services, APIs, and relational data models.
Own projects through discovery, technical design, implementation, testing, release, and ongoing improvement.
Improve checkout and payment reliability, accounting for concurrent activity, interrupted connections, retries, and transaction recovery.
Develop reusable components, internal tools, and workflows that help other engineers build more effectively.
Monitor and improve the systems you deliver, investigating performance issues across the browser, application, and database.
Use logs, metrics, and tracing to diagnose production incidents and address their underlying causes.
Incorporate AI coding tools into development while reviewing generated code and validating correctness.
Contribute to architecture discussions, code reviews, and mentoring.

What You Bring

A track record of owning substantial full-stack applications in production, with clear examples of your technical decisions and impact on users.
Strong programming fundamentals and modern frontend expertise, including state management, accessibility, interaction design, and performance.
Strong backend and relational database skills, particularly with PostgreSQL, including schema design, transactions, indexing, and query optimization.
Practical understanding of distributed systems concepts such as concurrency, idempotency, retries, and partial failures.
Experience troubleshooting production systems and improving reliability through effective observability.
Product judgment and the ability to turn an ambiguous customer need into a focused, usable solution.
The ability to independently move an open-ended project forward while communicating clearly with teammates.

Nice to Have

Experience with payments, retail technology, point-of-sale systems, or software supporting multi-location businesses.
Familiarity with card terminals, payment authorization and capture, or systems designed to remain resilient during connectivity issues.
Experience with the core stack or infrastructure tools such as AWS Aurora/RDS, ElastiCache, Datadog, and OpenTelemetry.
Experience creating shared architecture, development tools, or engineering practices adopted across teams.
Experience building LLM-powered features or improving engineering workflows with AI coding tools.

Candidates do not need experience with every technology listed. Demonstrated engineering judgment, product ownership, and the ability to learn quickly are valued. Compensation and Benefits

Base salary of $220,000–$280,000, depending on experience, skills, and scope of responsibility.
Meaningful equity.
Fully company-covered medical and dental benefits.
401(k).
Weekly catered lunch and dinner available each evening for employees who would like to eat with the team.

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