Project Management

Senior Business Analyst (fixed-term contract)

Project Management|Contract

About the job

We are looking for a Senior Business Analyst with an account-facing mindset to serve as a key bridge between clients and internal teams. This role goes beyond traditional BA work, you will own client relationships, proactively manage accounts, and drive end-to-end delivery of features and solutions from requirements through to go-live. If you thrive in both technical conversations and client-facing environments, this role is for you.

This role is based at our client's site in the Nonthaburi area, requiring 3-4 days WIO.

In this role, you will get to:

Account Management

  • Serve as the primary point of contact for assigned client accounts, building and maintaining strong, long-term relationships
  • Proactively engage clients to understand evolving business needs, surface opportunities, and manage expectations throughout the project and product lifecycle
  • Lead regular client check-ins, status updates, and review meetings to ensure alignment and satisfaction
  • Identify and escalate risks, issues, or change requests early, working with internal stakeholders to resolve them efficiently
  • Support account growth by understanding client goals and connecting them with the right solutions

Business Analysis

  • Lead requirement-gathering sessions with clients when new features or system enhancements are requested, ensuring needs are clearly captured, scoped, and prioritized
  • Translate complex business requirements into detailed functional specifications, process flows, use cases, and solution proposals for the development team
  • Act as the voice of the client internally, ensuring delivered solutions genuinely address business needs
  • Participate in and contribute to projects following SDLC or Agile methodologies
  • Plan, coordinate, and lead System Integration Testing (SIT) and User Acceptance Testing (UAT) with clients and internal QA teams
  • Define test scenarios and acceptance criteria in collaboration with clients and technical teams
  • Track, document, and manage defects and issues through to resolution during testing phases
  • Ensure smooth project go-live by coordinating cutover activities, training, and post-launch support

You’ll be successful if you have:

  • Bachelor's or Master's degree in Computer Science, Computer Engineering, Information Technology, Business Information Systems, or a related field
  • At least 3–4 years of experience as a Business Analyst, Account Executive, or a combined role with a track record of managing client-facing delivery
  • Hands-on experience leading UAT and SIT cycles, including test planning, defect tracking, and sign-off coordination
  • Proven ability to gather, document, and manage requirements for software development or system implementation projects
  • Solid understanding of SDLC and/or Agile methodologies
  • Experience acting as a client or account contact, managing relationships, expectations, and communications independently
  • Strong analytical and problem-solving skills with attention to detail
  • Excellent communication skill, able to translate between technical and non-technical stakeholders confidently
  • Experience in retail, convenience store, or consumer-facing business environments is a strong plus
  • Good communication skills in English and Thai Native


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Benefits & Perks
15 Days Annual leave & 5 Days Personal Leave
Health Insurance
Annual Health Check-up
Referral Bonus 30K
Buying Books / Sertis Library
Free Snacks & Soft Drink
Team Building Activity
Birthday Gifts
Provident Fund
Bonus
people at Sertis
Be a part of

Project Management

team
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5 steps

for interview

Depends on the department

1

Short Screen Video Call with Talent Acquisition

You will be asked a few questions on your experience, skills, availability, career expectations and motivations.

Short Screen Video Call with Talent Acquisition

2

First Interview

You will go through role-related interview and meet the team to speak more in depth about the role.

First Interview

3

Take Home Test

The take home assignment will be given to you based on the requirements of each position so that we understand your skills deeper.

Take Home Test

4

Second Interview

In this interview, you will have a chance to present your assignment or have a talk with cross-functional team members, depending on each position. This round can be either online or offsite interviews.

Second Interview

5

Sertis Offer

Congrats! We want to make you an offer, usually the offer will take place over the phone and we will send the written form later. Take your time! And ask all the questions you need before making a decision. We completely understand and here to help.

Sertis Offer

This is your chance

to build your career

in a growing data driven

industry.|

Because we cultivate intelligence and learning and help people grow beyond their potential.
We seek passion and ambition to turn data into action!
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Address
Sertis Co., Ltd.
597/5 Sukhumvit Road, Khlong Tan Nuea,
Wattana, Bangkok, Thailand 10110
Tel
(66) 2-001-1893
Fax
(66) 2-001-1894
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