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Software Development Engineer 1

WEX

  • Bengaluru, Karnataka, India
  • Not disclosed
  • Fresher (0-1 Yrs)
  • Posted Today
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About the role

WEX is a leading global provider of payment solutions and financial technology services, serving businesses across travel, fleet, and corporate sectors. With a strong presence in more than 30 countries, the company leverages cutting‑edge platforms to simplify complex payment workflows and deliver real‑time insights to its clients. In India, WEX has been expanding its engineering footprint, especially in Bengaluru, to tap into the vibrant tech talent pool and drive innovation in cloud‑native applications, data analytics, and API‑first services.

The organization promotes a collaborative culture where engineers are encouraged to experiment, learn, and contribute to products that have a tangible impact on millions of transactions daily.

The role of Software Development Engineer 1 (SDE‑1) is designed for fresh graduates who are eager to start their professional journey in software engineering. As an SDE‑1, you will be part of a dynamic product team that builds and maintains backend services and full‑stack features for WEX’s payment platforms. You will work closely with senior engineers, product managers, and quality assurance teams to translate business requirements into scalable, reliable code.

This position offers a solid foundation in modern software development practices, exposure to cloud environments, and opportunities to grow into specialized or leadership roles within the company.

Key Responsibilities

  • Design, develop, and maintain robust software components using Java, Python or JavaScript/TypeScript.
  • Implement RESTful APIs and integrate them with databases and third‑party services.
  • Write clean, testable, and well‑documented code adhering to coding standards.
  • Participate in code reviews, provide constructive feedback, and adopt best practices.
  • Debug, troubleshoot, and resolve software defects efficiently.
  • Develop unit tests and contribute to automated testing pipelines.
  • Collaborate with cross‑functional teams to define technical specifications and product roadmaps.
  • Assist in CI/CD pipeline setup and basic cloud deployment tasks.
  • Continuously learn and apply new technologies, especially in cloud and containerization.
  • Contribute ideas for performance optimization and architectural improvements.

Tech Stack: Java / Python / Node.js, TypeScript, Spring Boot / Express, PostgreSQL / MySQL, AWS (EC2, S3, Lambda), Docker, Git, Jenkins/GitHub Actions, REST APIs, Agile Scrum.

Growth Path: Starting as an SDE‑1, you can progress to SDE‑2, SDE‑3, and eventually to Lead Engineer or Architecture roles. WEX also encourages lateral moves into product management, data engineering, or DevOps, supported by internal training programs and mentorship.

Why Join WEX? You will work on mission‑critical payment systems that affect real‑world commerce, gain exposure to global best practices, and be part of a supportive community that values continuous learning. The company offers competitive compensation, flexible work arrangements, and a clear roadmap for career advancement, making it an ideal launchpad for ambitious software engineers.

Eligibility & process

Who can apply

Bachelor's degree in Computer Science, Information Technology, Software Engineering, or related fields; minimum 60% aggregate or CGPA 6.0/10; graduating batch 2023‑2025; no active backlogs at the time of joining; strong academic record in core programming subjects.

Skills & stack

Java Python JavaScript TypeScript Data Structures & Algorithms Algorithms Object Oriented Programming Rest Api Development

Selection process

  1. Round 1: Online coding assessment (DSA and programming problems)
  2. Round 2: Technical interview (system design, coding, and problem solving)
  3. Round 3: HR interview (fitment, motivations, and company culture)

Prep kit

20 resources
Study material 4
Company-specific guides 4
Likely coding questions 4
Round-wise strategy 4
Round 1: Online Assessment (OA) Aptitude, Quantitative Logic & 2 Coding Problems Focus on accuracy and speed. Practice arrays, strings, and standard arithmetic puzzles.
Round 2: Technical Interview 1 Core Tech Stack (Java, Python, JavaScript, TypeScript, Data Structures & Algorithms, Algorithms, Object Oriented Programming, Rest Api Development) & Live Code Tracing Explain your thought process aloud. Analyze time & space complexities before coding.
Round 3: System Design & Problem Solving Database Schemas, APIs & Architecture Basics Clarify edge cases, diagram schemas cleanly, and discuss scalability trade-offs.
Round 4: HR & Cultural Fit Discussion WEX Core Values, Learning Agility & Offer Terms Demonstrate passion, strong communication, and readiness for full-time collaboration.
Technical questions 5
Explain OOP (Object-Oriented Programming) principles with real-world examples in Java. Answer
Model answer: 1. Encapsulation (data hiding via private fields/getters). 2. Abstraction (hiding implementation complexity). 3. Inheritance (code reusability). 4. Polymorphism (method overriding/overloading).
What is the time and space complexity of QuickSort vs MergeSort? Answer
Model answer: QuickSort: Average O(N log N) time, O(log N) space. Worst O(N^2). MergeSort: Guaranteed O(N log N) time, but requires O(N) auxiliary space.
Explain the difference between SQL Indexing (B-Tree vs Hash) and when not to use an index. Answer
Model answer: Indexes speed up SELECT queries via B-Trees. However, they slow down INSERT, UPDATE, and DELETE operations because indexes must be updated on disk. Avoid on low-cardinality columns (e.g., boolean flags).
What happens under the hood when you enter a URL in a browser? Answer
Model answer: 1. DNS lookup (resolves IP). 2. TCP 3-way handshake (SYN, SYN-ACK, ACK). 3. TLS negotiation for HTTPS. 4. HTTP GET request sent. 5. Server responds with HTML/CSS/JS. 6. Browser renders DOM & CSSOM tree.
What is the difference between REST and GraphQL APIs? Answer
Model answer: REST uses multiple fixed endpoints with possible over/under-fetching. GraphQL uses a single endpoint allowing clients to query exact fields in a single request.
Behavioural & HR questions 3
Why do you want to join WEX as a Software Development Engineer 1?
Highlight WEX's market reputation, recent tech innovations, and how your skills in Java directly solve their team's objectives.
Describe a challenging bug or academic project roadblock and how you resolved it.
Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
How do you handle strict deadlines or sudden scope changes?
Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.
WEX Not disclosed
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