SES Software Engineer interview questions & guide 2026

Preparation for an SES interview requires a balance of solid engineering fundamentals and the ability to articulate your thought process clearly. You should be prepared to discuss not only the "how" of your code but the "why" behind your architectural decisions.

Role-Related Knowledge – You must demonstrate mastery of your primary programming languages and database technologies. Be prepared to discuss specific projects where you handled data-intensive tasks, as this is a recurring theme in the SES technical environment.

Problem-Solving Ability – Interviewers look for structured, logical approaches to ambiguous problems. When faced with a coding challenge, talk through your thought process aloud; the logic behind your solution is often more important to the interviewer than the final syntax.

Leadership & Communication – Because SES operates globally, your ability to communicate effectively with diverse, cross-functional teams is critical. Be ready to provide concrete examples of how you have influenced technical direction or mentored junior developers.

Culture Fit – SES values professionalism, reliability, and a collaborative spirit. Demonstrate that you are a team player who is willing to engage with the broader mission of the company rather than working in a silo.

The interview process at SES typically follows a structured, multi-stage path, though the intensity and specific steps can vary based on the region and the specific team. Most candidates begin with a talent acquisition screening to assess alignment, followed by one or more technical assessments. These assessments may take the form of live coding sessions, take-home assignments, or deep-dive technical discussions with engineering managers.

The process is designed to evaluate both your technical competence and your ability to fit into the team's existing workflow. Candidates who progress to the final stages usually meet with hiring managers and sometimes team leads to discuss long-term project goals and the specific challenges of the role.

This visual timeline illustrates the typical progression from initial screening to final technical evaluation. Use this to pace your preparation, ensuring you have refreshed your core technical skills before the technical rounds and prepared your behavioral stories for the manager interviews.

Technical Proficiency

This area evaluates your command of the tools required for the role. Strong performance involves not just writing functional code, but writing code that is maintainable, scalable, and secure.

Be ready to go over:

• Database design and complex SQL queries.
• JavaScript/Frontend frameworks and their application in data-heavy UIs.
• Algorithmic efficiency and time complexity.

Example scenarios:

• "Explain how you would optimize a query that is running slowly against a large dataset."
• "What are the common pitfalls in the language you use most frequently, and how do you avoid them?"

System Design & Architecture

You will be evaluated on your ability to see the "big picture." This is particularly relevant for roles involving satellite data or network services.

Be ready to go over:

• Data integration patterns for obscure or unstructured data.
• Designing for high availability and low latency.
• API design and communication between microservices.

Example scenarios:

• "How would you architect a system that consumes real-time telemetry from multiple global sources?"
• "Describe a time you had to refactor a legacy system to improve its performance."

As a Software Engineer at SES, you are responsible for the end-to-end development lifecycle of your assigned modules. You will likely spend your time:

• Designing and implementing software features that support satellite network operations or customer-facing applications.
• Collaborating with R&D teams to translate complex technical requirements into functional, high-performance code.
• Participating in rigorous code reviews to ensure the quality and security of the codebase.
• Troubleshooting production issues and contributing to the stability of mission-critical systems.
• Engaging with stakeholders to define requirements and manage project expectations throughout the development cycle.

A strong candidate for a Software Engineer position at SES combines technical depth with a pragmatic approach to problem-solving.

• Must-have skills: Proficiency in modern programming languages (e.g., JavaScript, Python, or Java), strong SQL skills, and experience with system design.
• Nice-to-have skills: Experience with cloud infrastructure, knowledge of satellite or telecommunications protocols, and exposure to data visualization tools.
• Soft skills: Fluency in English is essential, as is the ability to collaborate with international teams and communicate complex ideas clearly.

Q: How long does the interview process typically take? The process can range from a few weeks to over a month, depending on the team and the number of interview rounds.

Q: Should I expect a take-home assignment? It is common for some teams to request a take-home assignment followed by a discussion on your design choices; be prepared to justify the trade-offs you made.

Q: Is knowledge of satellite technology required? While prior experience in the satellite industry is a significant plus, it is not always a strict requirement; a strong engineering background and a willingness to learn the domain are often sufficient.

Q: What is the most important thing to focus on during the interview? Focus on your communication. The ability to explain your technical decisions clearly and show how you work within a team is often the deciding factor for candidates.

• Be prepared to explain your resume: Know every project you have listed in detail and be ready to discuss the challenges you faced and how you overcame them.
• Ask meaningful questions: Use the interview as an opportunity to learn about the team’s current challenges—this shows genuine interest and engagement.
• Clarify the requirements: If a technical question feels ambiguous, do not hesitate to ask for clarification; it shows you value accuracy.
• Stay professional: The interview process is also a test of your professional maturity; maintain a positive and collaborative attitude throughout.

Preparing for a Software Engineer role at SES is an investment in your career that requires both technical readiness and a clear understanding of the company's mission. By focusing on your core engineering skills, practicing your architectural thinking, and preparing to communicate your experiences effectively, you will significantly improve your chances of success.

We encourage you to review the patterns identified in this guide and use them to structure your study sessions. For additional insights and to track your progress, continue exploring the resources available on Dataford. You have the capability to succeed in this process—stay focused, stay confident, and demonstrate the technical rigor that SES expects from its engineers.