Senior Software Engineer - Java

Introduction

Senior Software Engineers are subject matter experts with mastery in a specific product and/or technical functional area and consistently manage and ship high quality and timely releases that solve complex problems end-to-end within a team. They possess strong technical skills and experience in their areas of expertise that they leverage to mentor junior engineers and to make thoughtful technical tradeoff decisions. They proactively communicate their technical design and decisions through various technical forums. They own the operational excellence of their services/components. They assume increasing levels of leadership roles on technical and/or non-technical (cultural) initiatives and play an influential role in hiring, retaining and growing diversity in the company.

Job Responsibilities

As a Senior Java Software Engineer, you will:

• Work on enhanced features and a suite of campaign products
• Work with Email Marketing software, building up new features as well as maintaining the large running system
• Day-to-day work with MVC applications and services, from back-end to front-end development.
• Excellent experience with the following technologies: MVC (Model – View – Controller)
  • Spring, Struts framework
  • AJAX, JSON and Rest, SOAP
  • Html 5/CSS 3
  • JavaScript, jQuery
  • Java Core, J2SE
  • Hibernate and SQL/NoSQL Database
  • Elastic search
• Familiar with Linux system
• Demonstrated ability to develop innovative solutions to build good applications and services
• Excellent problem-solving skills
• Ability to study new things quickly
• Ability to work on multiple projects and in team
• Exposure to an Agile environment
• Understands the value of commitments and puts 100% effort into them
• Good written and verbal English communication skills

Knowledge and Experience

• 5+ years of experience as a software engineer
• Experience coding in an industry-standard language (Java, JavaScript, etc.)
• Experience building, delivering, and maintaining services that comprise modern PaaS/SaaS products
• Experience with agile delivery workflows and modern software quality techniques like TDD, pair programming, etc.
• Experience developing or contributing to development platforms or software frameworks

Education

• Bachelor’s Degree (Computer Science or engineering preferred) or equivalent work experience

Competencies

• Displaying Technical Expertise
• Critical Thinking
• Solving Complex Problems
• Demonstrating Initiative
• Delivering High Quality Work

About Optimizely

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and choice to build their stack their way with our fully SaaS, fully decoupled, and highly composable solution.

We are proud to help more than 10,000 businesses, including H&M, PayPal, Zoom, and Toyota, enrich their customer lifetime value, increase revenue and grow their brands. Our innovation and excellence have earned us numerous recognitions as a leader by industry analysts such as Gartner, Forrester, and IDC, reinforcing our role as a trailblazer in MarTech.

At our core, we believe work is about more than just numbers -- it's about the people. Our culture is dynamic and constantly evolving, shaped by every employee, their actions and their stories. With over 1500 Optimizers spread across 12 global locations, our diverse team embodies the "One Optimizely" spirit, emphasizing collaboration and continuous improvement, while fostering a culture where every voice is heard and valued.

Benefits

• We are Vietnam Best IT companies 2026 by ITviec.
• Hackdays for self-studying and researching any IT-related subjects.
• 5 working days/week with flexible working time and no overtime.
• Annual unforgettable company outing.
• International, professional, creative working environment and talented teams.
• Onsite opportunities in Europe and US.
• Common cultural-sportive- art Clubs and activities, sponsored and/or supported by the Company (Ex: Football, GYM, Swimming, Guitar, English…).
• Powerful workstation: Core i7-9700, 16-32 GB RAM, 02 x QHD 2560x1440 monitors (2K resolution).
• 100% official salary during the probation period, 13th month salary, annual salary raise.
• Up to 03 extra paid-leave days per year.
• Social, Health and Unemployed Insurance are based on 100%.
• Gross salary and fully paid by Company.
• Extra bonus at $ 60 per special occasions (Birthday, Labor Day, National Day, Solar New year, Lunar New Year).
• Lunch allowance at $30 per month.
• Baby allowance for a child under 03 years old is $ 12 per month.
• AON Premium Healthcare Insurance package for employees and their children up to 18 years old.
• Daily various foods, drink, and seasonal fresh fruits.