From: "mrigank.ballabh@hk.yusen-logistics.com"
	<mrigank.ballabh@hk.yusen-logistics.com>
To: "pgsql-jobs@postgresql.org" <pgsql-jobs@postgresql.org>
CC: "yoichi.nozoe@hk.yusen-logistics.com"
	<yoichi.nozoe@hk.yusen-logistics.com>,
        "syeda.samreen@hk.yusen-logistics.com"
	<syeda.samreen@hk.yusen-logistics.com>
Subject: Senior Postgres Database Developer 8+ years
Thread-Topic: Senior Postgres Database Developer 8+ years
Thread-Index: AQHcFmwcgauSe0fJdEeh8OLlJEoExA==
Date: Tue, 26 Aug 2025 09:34:46 +0000
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--_000_TYYP301MB135488AEFB73DD10696220F78139ATYYP301MB1354JPNP_
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Senior Database Developer
Experience: >8 years
Work Mode: Hybrid
Tech Stack: PostgreSQL, MongoDB, Cassandra

Key Responsibilities

  *   Database Architecture & Data Modeling
Design and maintain scalable, normalized and denormalized schemas for micro=
services and reporting use cases using PostgreSQL, MongoDB, and Cassandra (=
especially for time-series or high-write workloads).
  *   Query & Aggregation Development
Write and optimize SQL queries, views, materialized views, stored procedure=
s, and MongoDB aggregation pipelines. Develop efficient CQL-based queries a=
nd data models for Cassandra in distributed environments.
  *   Application Integration
Work closely with Java Spring Boot teams to define efficient ORM mappings (=
Hibernate, JPA) and API-facing query strategies. Participate in schema evol=
ution and entity refactoring across SQL and NoSQL platforms.
  *   Performance Optimization
Analyze execution plans, tune queries, recommend indexes, and optimize join=
s, batch loads, and aggregation logic for high-throughput transactional sys=
tems. Use Cassandra=92s partitioning and clustering keys for performance.
  *   Reporting Logic
Develop backend logic and data layers to support BI tools and custom dashbo=
ards. Collaborate with frontend and data teams to meet data presentation re=
quirements.
  *   Data Governance & Standards
Define and enforce constraints, validation logic, and naming conventions ac=
ross services. Work with analysts and QA to ensure data consistency across =
PostgreSQL, MongoDB, and Cassandra.
  *   Versioning & Deployment
Maintain schema versioning using Flyway or Liquibase or any relevant tools.=
 Review and approve migration scripts as part of CI/CD workflows with DevOp=
s.
  *   Backup Knowledge (Supportive)
Coordinate with infra teams for PostgreSQL PITR, MongoDB snapshot/restore, =
and Cassandra backup integration. Validate restore logic periodically, with=
out being the primary owner.


Must-Have Skills

  *   Proficiency in SQL query optimization, indexing, schema design, and M=
ongoDB/Cassandra aggregation pipelines.
  *   Hands-on experience collaborating with backend developers and writing=
 query logic that supports APIs and domain-driven models.
  *   Comfortable with high-concurrency systems, denormalized views, partit=
ioning, and materialized logic.
  *   Deep understanding of Cassandra=92s data modeling (e.g., primary key =
vs. partition key), compaction strategies, and consistency trade-offs.
  *   Proficient in cloud-native databases (e.g., GCP/AWS PostgreSQL, Mongo=
DB Atlas, Cassandra DBaaS) and Kubernetes-based DB deployments.


Nice-to-Have Skills

  *   Kafka, RabbitMQ, or event-driven persistence models.
  *   Experience with Redis or in-memory caching strategies.
  *   Exposure to OpenSearch / Elasticsearch for analytics or log event pip=
elines.
  *   Familiarity with RBAC, encryption, and row-level security in regulate=
d environments (GDPR, SOC2).
  *   Experience supporting reporting engines or data extraction for BI.

Regards,

Mrigank B Singh (MG)

IT Manager (G2)

Yusen Logistics Ltd.


--_000_TYYP301MB135488AEFB73DD10696220F78139ATYYP301MB1354JPNP_
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<html>
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252">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, =
Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);" clas=
s=3D"elementToProof">
<b>Senior Database Developer</b></div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);" class=3D"elementToProof">
<b>Experience:</b>&nbsp;&gt;8 years<br>
<b>Work Mode:</b>&nbsp;Hybrid</div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
<b>Tech Stack:</b>&nbsp;PostgreSQL, MongoDB, Cassandra</div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
&nbsp;</div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);" class=3D"elementToProof">
<u>Key Responsibilities</u></div>
<ul>
<li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, C=
alibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b>Database Architecture &amp; Data Modeling</b><br>
Design and maintain scalable, normalized and denormalized schemas for micro=
services and reporting use cases using PostgreSQL, MongoDB, and Cassandra (=
especially for time-series or high-write workloads).</li><li style=3D"font-=
family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica,=
 sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b>Query &amp; Aggregation Development</b><br>
Write and optimize SQL queries, views, materialized views, stored procedure=
s, and MongoDB aggregation pipelines. Develop efficient CQL-based queries a=
nd data models for Cassandra in distributed environments.</li><li style=3D"=
font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helve=
tica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b>Application Integration</b><br>
Work closely with Java Spring Boot teams to define efficient ORM mappings (=
Hibernate, JPA) and API-facing query strategies. Participate in schema evol=
ution and entity refactoring across SQL and NoSQL platforms.</li><li style=
=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, H=
elvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b>Performance Optimization</b><br>
Analyze execution plans, tune queries, recommend indexes, and optimize join=
s, batch loads, and aggregation logic for high-throughput transactional sys=
tems. Use Cassandra=92s partitioning and clustering keys for performance.</=
li><li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService=
, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b>Reporting Logic</b><br>
Develop backend logic and data layers to support BI tools and custom dashbo=
ards. Collaborate with frontend and data teams to meet data presentation re=
quirements.</li><li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_=
MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(=
0, 0, 0);">
<b>Data Governance &amp; Standards</b><br>
Define and enforce constraints, validation logic, and naming conventions ac=
ross services. Work with analysts and QA to ensure data consistency across =
PostgreSQL, MongoDB, and Cassandra.</li><li style=3D"font-family: Aptos, Ap=
tos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font=
-size: 11pt; color: rgb(0, 0, 0);">
<b>Versioning &amp; Deployment</b><br>
Maintain schema versioning using Flyway or Liquibase or any relevant tools.=
 Review and approve migration scripts as part of CI/CD workflows with DevOp=
s.</li><li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontSer=
vice, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);=
">
<b>Backup Knowledge (Supportive)</b><br>
Coordinate with infra teams for PostgreSQL PITR, MongoDB snapshot/restore, =
and Cassandra backup integration. Validate restore logic periodically, with=
out being the primary owner.</li></ul>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
&nbsp;</div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
<u>Must-Have Skills</u></div>
<ul>
<li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, C=
alibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Proficiency in SQL query optimization, indexing, schema design, and MongoDB=
/Cassandra aggregation pipelines.</li><li style=3D"font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
Hands-on experience collaborating with backend developers and writing query=
 logic that supports APIs and domain-driven models.</li><li style=3D"font-f=
amily: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, =
sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Comfortable with high-concurrency systems, denormalized views, partitioning=
, and materialized logic.</li><li style=3D"font-family: Aptos, Aptos_Embedd=
edFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11p=
t; color: rgb(0, 0, 0);">
Deep understanding of Cassandra=92s data modeling (e.g., primary key vs. pa=
rtition key), compaction strategies, and consistency trade-offs.</li><li st=
yle=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri=
, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Proficient in cloud-native databases (e.g., GCP/AWS PostgreSQL, MongoDB Atl=
as, Cassandra DBaaS) and Kubernetes-based DB deployments.</li></ul>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
&nbsp;</div>
<div style=3D"margin-top: 1em; margin-bottom: 1em; font-family: Aptos, Apto=
s_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-s=
ize: 11pt; color: rgb(0, 0, 0);">
<u>Nice-to-Have Skills</u></div>
<ul>
<li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, C=
alibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Kafka, RabbitMQ, or event-driven persistence models.</li><li style=3D"font-=
family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica,=
 sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Experience with Redis or in-memory caching strategies.</li><li style=3D"fon=
t-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetic=
a, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Exposure to OpenSearch / Elasticsearch for analytics or log event pipelines=
.</li><li style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontServ=
ice, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"=
>
Familiarity with RBAC, encryption, and row-level security in regulated envi=
ronments (GDPR, SOC2).</li><li style=3D"font-family: Aptos, Aptos_EmbeddedF=
ont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; =
color: rgb(0, 0, 0);">
Experience supporting reporting engines or data extraction for BI.</li></ul=
>
<div style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, =
Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);" clas=
s=3D"elementToProof">
<br>
</div>
<div class=3D"elementToProof" id=3D"Signature">
<div style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, =
Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);" clas=
s=3D"elementToProof">
Regards,</div>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
" class=3D"elementToProof">
<span style=3D"color: rgb(190, 91, 23);">M</span>ri<span style=3D"color: rg=
b(190, 91, 23);">g</span>ank B Singh (<span style=3D"color: rgb(190, 91, 23=
);">MG</span>)</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
" class=3D"elementToProof">
IT Manager (G2)</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
" class=3D"elementToProof">
Yusen Logistics Ltd.</p>
<p style=3D"margin: 0in; font-family: Calibri, sans-serif; font-size: 11pt;=
" class=3D"elementToProof">
&nbsp;</p>
</div>
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