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Mactores is the agent-native AWS modernization firm. Most modernization work doesn't ship, it stalls in pilots, slips a year, or lands at three times the budget. We exist to ship it: production systems running, legacy retired, outcomes measured. Our delivery is built on Aedeon, the agent platform built by Mactores' founders' sister company, which absorbs the repetitive 6070% of engagement work, discovery, dependency mapping, validation, test generation, that traditional consulting bills human hours against. Forward-deployed engineers own the rest: architecture, judgment, and cutover, on dates we commit to in the contract. We are seeking an experienced Senior Database Developer to lead and support Oracle to PostgreSQL/Aurora PostgreSQL migration initiatives. The role involves deep hands-on work across SQL refactoring, schema conversion, DMS operations, performance tuning, and postgo-live stabilization. The candidate will work closely with application teams, cloud engineers, and stakeholders to ensure a smooth, performant, and compliant migration. What you will do Refactor and convert Oracle SQL, PL/SQL, and database objects to PostgreSQL-compatible SQL/PLpgSQL. Analyze and remediate AWS SCT (Schema Conversion Tool) findings and limitations. Manage and maintain Flyway migration codebase (versioned scripts, repeatable migrations, rollbacks). Identify, troubleshoot, and fix database-related application bugs. Perform query optimization for PostgreSQL (execution plans, indexing strategies, query rewrites). Support and monitor AWS DMS during full load and CDC phases. Diagnose and resolve DMS data and performance issues. Perform data validation and reconciliation between Oracle and PostgreSQL. Collaborate with application teams to align SQL behavior and performance expectations. What are we looking for Bachelor's degree in Computer Science or a related field. 5+ years of experience as an Oracle/PostgreSQL DBA and database developer. Solid experience with Oracle Database and PostgreSQL / Aurora PostgreSQL. Hands-on expertise in Oracle to PostgreSQL migration. Advanced SQL and query performance tuning skills. Experience with AWS SCT and AWS DMS. Knowledge of Flyway/Liquibase or similar schema migration tools. PostgreSQL internals: indexing, statistics, execution plans. AWS services: RDS/Aurora, CloudWatch, IAM (preferred). You will be preferred if: Familiarity with automation and configuration management tools, such as Ansible, Chef, or Puppet. Familiarity with IAAC tools such as Terraform, CloudFormation. Familiarity with CI/CD implementation tools like Liquibase/Flyway. AWS Certified Database Specialty. AWS Certified Solutions Architect. .
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Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.