Senior Software Engineer

Halliburton Energy Services; Abingdon; On-site; GBP 70,000 - 110,000; Full time

Job summary

Landmark, a Halliburton company, is seeking a senior software engineer to own features end to end across multiple domains. You will work on critical production software used by engineers and operators worldwide, contributing to design, implementation, testing and delivery with minimal supervision.

Strong fundamentals and ability to mentor others are essential. You will collaborate across time zones, adopt secure coding practices, and help evolve the codebase and development processes in a

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related discipline or equivalent experience
• 5–10 years of software development experience
• Proficiency in at least one of Java, C#/F# (.NET), C++, Python, or TypeScript (React/Angular/Node.js)
• Experience owning the full development cycle: requirements analysis, design, implementation, testing, and delivery
• Experience debugging production software and tracing root causes across components or layers
• Clear written and verbal communication, including explaining technical decisions and trade‑offs

Responsibilities

• Own features end to end: analyze requirements, design solutions, write code, test, and ship
• Break complex specs into tasks with realistic schedules and flag risks early
• Proactively fix weaknesses in codebase, tests, and development process
• Investigate production defects and trace root cause across multiple components
• Apply secure coding practices and fix security issues as they arise
• Review code from other engineers with rigor
• Evaluate and integrate open‑source tools and libraries
• Mentor junior engineers through code reviews, pairing, and guidance
• Communicate clearly across a distributed, cross‑timezone team

Skills

Java

C#

F#

C++

Python

TypeScript

Education

Bachelor's degree in Computer Science or related

Tools

Docker

Kubernetes

Terraform

Ansible

Helm

Argo CD

Job description

We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s largest providers of products and services to the global energy industry.

Job Duties

About Landmark

Landmark, a Halliburton company, builds the software and data platforms that help the global energy industry make better decisions. Our products span subsurface interpretation, well construction planning, reservoir simulation, production optimization, and digital operations. These are tools used daily by engineers and scientists at the world’s largest energy companies and run as cloud-native SaaS platforms and as enterprise on‑premises solutions.

About the Role

You own the full development cycle for the features and systems your team assigns you. At Landmark, that means working on software that oil and gas operators depend on for high‑stakes decisions. You take a feature from specification through design, implementation, testing, and delivery with minimal supervision and enough judgment to make good technical decisions along the way. You contribute to code reviews, improve the codebase and processes around you without waiting to be asked, and help junior engineers grow. The quality of what you build shows up in production software used by operators worldwide.

Strong software engineering fundamentals are the primary requirement. Domain knowledge is valuable but can develop on the job.

Positions are available across a range of teams. Team assignment determines both the product domain you work in and the major technologies you use.

Teams build software for domains such as:

• Geoscience – geology, geophysics, or petrophysics
• Drilling engineering and well planning
• Reservoir engineering and modeling
• Production engineering and optimization
• E&P data management and integration
• Cloud and platform infrastructure, data services, and developer tooling
• AI‑assisted analytics, search, and generative AI

Technologies used vary by team and include:

• Languages such as Java, C#, F#, C++, Python, and TypeScript
• Frameworks, platforms, and runtimes such as .NET, Eclipse RCP/SWT, JUnit, Angular, React, and Node.js
• Cloud platforms including Azure and AWS
• Containerization and orchestration tooling such as Docker and Kubernetes
• Infrastructure automation tools such as Terraform, Ansible, Helm, and Argo CD/Flux
• Relational and NoSQL databases such as PostgreSQL, SQL Server, Oracle, and MongoDB

What You Will Do

• Own features end to end: analyze requirements, design solutions, write the code, test it, and ship it
• Break complex specifications into concrete tasks with realistic schedules and flag risks early
• Proactively identify and fix weaknesses in the codebase, the test coverage, and the development process
• Investigate and resolve production defects, and trace root cause when symptom and source are not in the same place
• Apply secure coding practices, surface vulnerabilities in code reviews, and fix security issues as they arise
• Review code from other engineers with the same rigor you expect on your own work
• Evaluate and integrate open‑source tools and libraries where they improve the systems you work on
• Mentor junior engineers through code reviews, pairing, and direct technical guidance
• Communicate clearly across a distributed, cross‑timezone team

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or a related discipline, or equivalent experience
• 5–10 years of software development experience
• Strong proficiency in at least one of: Java, C#/F# (.NET), C++, Python, or TypeScript (React/Angular/Node.js)
• Experience owning the full development cycle: requirements analysis, design, implementation, testing, and delivery
• Experience debugging production software and tracing root causes that span multiple components or layers
• Clear written and verbal communication, including the ability to explain technical decisions and trade‑offs to teammates and stakeholders

Preferred

• Experience with cloud‑native development, full‑stack or web application development, or data platform technologies
• Experience with CI/CD pipelines, containerization, and infrastructure automation
• Background in enterprise software, SaaS platforms, or technically demanding application domains (scientific computing, real‑time systems, large‑scale data)
• Exposure to integrating machine learning, generative AI, or LLM‑based components into application features
• Experience mentoring less experienced engineers
• Energy industry experience is not required but is a strong plus. We welcome candidates from all backgrounds and encourage you to apply even if your experience does not match every item in the preferred list.

How You Work

The engineer who succeeds in this role brings independent judgment to their work and applies it consistently. You own your assignments end to end, communicate clearly when something is off track, and treat code reviews as a genuine quality tool rather than a formality. You are comfortable working across time zones, adaptable when requirements shift, and focused on delivery outcomes rather than task completion. You pick up new tools and techniques on your own, evaluate them critically, and bring the ones that work to your team. You help the engineers around you improve because you understand that team quality compounds over time.

Why Landmark

We build small, high‑ownership teams and invest in the quality of every person on them. You will work in a business where software is the product, the work you do matters, and the standards are high. You will own real work that ships, learn from engineers who push you, and grow into the kind of engineer the team relies on.

We offer competitive compensation, a strong career path, and a role where you own what you build, and your impact is visible.

Minimum Qualifications: Minimum qualifications may be acquired through technical schools or equivalent related experience. Candidates having qualifications that exceed the minimum job requirements will receive consideration for higher level roles given (1) their experience, (2) additional job requirements, and/or (3) business needs. Depending on education, experience, and skill level, a variety of job opportunities might be available from the Software Engineer to Senior.

Halliburton is an Equal Opportunity Employer

Employment decisions are made without regard to race, color, religion, disability, genetic information, pregnancy, citizenship, marital status, sex/gender, sexual preference/ orientation, gender identity, age, veteran status, national origin, or any other status protected by law or regulation.

Location

97 Jubilee Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4RW, United Kingdom

Compensation Information

Compensation is competitive and commensurate with experience.