Java & AWS Engineer 3+ years of experience. extensive experience in crafting robust distributed-system applications for my clients.
Aktualisiert am 16.09.2024
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 16.09.2024
Verfügbar zu: 100%
davon vor Ort: 100%
Java
Python
AWS
JSON-RPC
TypeScript
Microservices
Cloud

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

1 month
2024-08 - 2024-08

Serverless Gradual Rollout Strategy

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The client, an internal Amazon organization, was lacking proper validation of new features. This led to an inefficient deployment process and potential downtime for customers.

  • Reduced allocated developer bandwidth by 8+ hours per release by implementing a canary deployment strategy and automatic rollback mechanism, thus eliminating manual intervention in the deployment process.
  • Minimized bug-introducing risk by 80% by enhancing the app with a bug-detection component functioning through error-pattern recognition.

Java AWS CloudFormation CloudWatch Lambda CodeDeploy SAM AppConfig Linux other AWS internal tooling
Amazon
2 months
2024-06 - 2024-07

Discard redundant alerts

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The client, an internal Amazon organization, was receiving irrelevant alerts, even when these had been previously identified as false positives. This caused inefficiencies in the transaction authorization process.

  • Increased throughput & operational efficiency by 10x by suppressing sending unnecessary alerts to the stakeholder?s system, thus streamlining the workflow.
  • Enhanced alert accuracy by 80% by leveraging integration with the dependency system more effectively.
Java AWS CloudFormation CloudWatch Lambda DynamoDB Kinesis SNS Batch AppConfig Linux other AWS internal tooling
Amazon
1 month
2024-05 - 2024-05

Security Audit

Senior Java Engineer Java AWS CloudAuth ...
Senior Java Engineer

The client, an Amazon sub-organization, lacked upper-level approval pertaining to data-classification security threats. This led to the organization?s 2 most important applications being categorized as untrustworthy.

  • Audited 2 platforms by analyzing relationships between various permissions, policies and roles the applications made use of, creating updated diagrams of the platforms and fixing desynchronizations between code and console.
  • Fixed 100+ security risks by promptly addressing threats related to: configurations, permissions, patching, networking and other vulnerabilities.
Java AWS CloudAuth Cloudformation CodeDeploy Route53 VPC NLB ALB EC2 EBS IAM Kinesis Lambda SQS SNS S3 AppConfig Systems Manager CertificateManager Linux other AWS internal tooling
Amazon
2 months
2024-03 - 2024-04

Expose service in multiple regions

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The clients, multiple AWS-internal organizations from the United States, Europe and India looking to screen transactions against denied parties were struggling with availability & latency problems, because of using a system only available on the US West Coast region.

  • Decreased latency by 95% by provisioning the required networking infrastructure in order to expose the API in the needed availability zones.
  • Increased availability by 3X by deploying the newly built infrastructure in the new availability zones and ensuring connections to the server occur in a timely manner.
  • Onboarded over 10 new heavy-load customers by granting various platform-wide permissions / privileges with our service.
Java AWS CloudFormation CloudWatch EC2 VPC Route53 SNS & SQS AWS? NLB & ALB Linux other AWS internal tooling
Amazon
2 months
2024-01 - 2024-02

Postal code screening & benchmarking

Senior Java Engineer Java AWS AppConfig ...
Senior Java Engineer

The client?s (an Amazon internal regulator?s) screening engine had difficulties identifying (matching) postal codes within noisy input, making the end-to-end process omit transactions containing addresses of potential perpetrators.

  • Improved postal code identification accuracy by 95% by making use of better noise elimination techniques and enhanced regular expression patterns.
  • Increased identification of previously known problematic inputs by 90% by eliminating all the known false negatives, without altering the baseline number of previously matched results. This was made possible by thorough analysis & benchmarking.
  • Captured additional 1000s of input addresses by automating the noise removal and proper-identification of UK postal codes, thus mitigating all the known, as well as some unknown risks. This further helped the organization achieve its quarterly targets.
Java AWS AppConfig EC2 Linux other AWS internal tooling
Amazon
1 year
2023-01 - 2023-12

Automatic monitoring of platforms deployments

Senior Java Engineer Java AWS CloudWatch ...
Senior Java Engineer

The client, an Amazon-internal team, lacked insights into its timely deployment of denied parties lists. This misalignment made it difficult to track which list revisions were deployed and used in screening, how long the entire process took and maintaining legal compliance.

  • Prevented Amazon from costly fines more than 5 times by automating the monitoring of deployment times, identifying delays, alerting on potential issues promptly and signaling for rollback.
  • Enhanced operational efficiency by 50% by creating a live dashboard, thus reducing manual intervention and providing detailed insights into the deployment process.
Java AWS CloudWatch SimpleWorkflow StepFunctions S3 Lambda EventBridge IAM Linux other AWS internal tooling TypeScript
Amazon
1 year 8 months
2021-05 - 2022-12

Big Data imagery import pipeline

Python Engineer Python Docker Kubernetes ...
Python Engineer

The client, an Asian-market leading automotive stakeholder, wished to surpass its competitors in terms of up-to-date navigation systems. They were facing issues with timely gathering street-level imagery updates from various sources and training & updating ML models for infotainment system maps.

  • Enabled fetching 10s of TeraBytes of data daily by implementing an automatic, large-scale imagery import pipeline.
  • Further decreased latency by 20% by investigating and fixing queue consumption performance issues, as well as migrating to the new major version API of the provider service.
  • Enabled better business insights by integrating the platform with a monitoring stack from scratch.
Python Docker Kubernetes RabbitMQ gRPC DC/OS (Mesos) Jenkins Linux ElasticSearch Kibana Logstash JupyterLab
Telenav

Aus- und Weiterbildung

Aus- und Weiterbildung

2019 - 2022:

Computer Science

BA

Babe? Bolyai University of Cluj Napoca, Cluj-Napoca

Kompetenzen

Kompetenzen

Top-Skills

Java Python AWS JSON-RPC TypeScript Microservices Cloud

Produkte / Standards / Erfahrungen / Methoden

Java
2 years
AWS
2 years
Python
2 years
TypeScript
1 year
Docker
2 years
Kubernetes
2 years
RabbitMQ
2 years
Jenkins
2 years
DC/OS (Mesos)
2 years
ELK Stack
2 years
JupyterLab
2 years
gRPC
2 years
Git
3 years
Linux
3 years

ABOUT ME

  • I am a Senior Java Engineer / contractor / freelancer with 3+ years of experience
  • I've worked in various industries, including: automotive, SEO and Denied Party Screening. My focus is on technical development complemented by exceptional communication skills. I use my expertise, skills, and passion to design and implement top-of-the-line software solutions for companies worldwide.
  • Drop me a message if you think my expertise could help your organization!

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

1 month
2024-08 - 2024-08

Serverless Gradual Rollout Strategy

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The client, an internal Amazon organization, was lacking proper validation of new features. This led to an inefficient deployment process and potential downtime for customers.

  • Reduced allocated developer bandwidth by 8+ hours per release by implementing a canary deployment strategy and automatic rollback mechanism, thus eliminating manual intervention in the deployment process.
  • Minimized bug-introducing risk by 80% by enhancing the app with a bug-detection component functioning through error-pattern recognition.

Java AWS CloudFormation CloudWatch Lambda CodeDeploy SAM AppConfig Linux other AWS internal tooling
Amazon
2 months
2024-06 - 2024-07

Discard redundant alerts

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The client, an internal Amazon organization, was receiving irrelevant alerts, even when these had been previously identified as false positives. This caused inefficiencies in the transaction authorization process.

  • Increased throughput & operational efficiency by 10x by suppressing sending unnecessary alerts to the stakeholder?s system, thus streamlining the workflow.
  • Enhanced alert accuracy by 80% by leveraging integration with the dependency system more effectively.
Java AWS CloudFormation CloudWatch Lambda DynamoDB Kinesis SNS Batch AppConfig Linux other AWS internal tooling
Amazon
1 month
2024-05 - 2024-05

Security Audit

Senior Java Engineer Java AWS CloudAuth ...
Senior Java Engineer

The client, an Amazon sub-organization, lacked upper-level approval pertaining to data-classification security threats. This led to the organization?s 2 most important applications being categorized as untrustworthy.

  • Audited 2 platforms by analyzing relationships between various permissions, policies and roles the applications made use of, creating updated diagrams of the platforms and fixing desynchronizations between code and console.
  • Fixed 100+ security risks by promptly addressing threats related to: configurations, permissions, patching, networking and other vulnerabilities.
Java AWS CloudAuth Cloudformation CodeDeploy Route53 VPC NLB ALB EC2 EBS IAM Kinesis Lambda SQS SNS S3 AppConfig Systems Manager CertificateManager Linux other AWS internal tooling
Amazon
2 months
2024-03 - 2024-04

Expose service in multiple regions

Senior Java Engineer Java AWS CloudFormation ...
Senior Java Engineer

The clients, multiple AWS-internal organizations from the United States, Europe and India looking to screen transactions against denied parties were struggling with availability & latency problems, because of using a system only available on the US West Coast region.

  • Decreased latency by 95% by provisioning the required networking infrastructure in order to expose the API in the needed availability zones.
  • Increased availability by 3X by deploying the newly built infrastructure in the new availability zones and ensuring connections to the server occur in a timely manner.
  • Onboarded over 10 new heavy-load customers by granting various platform-wide permissions / privileges with our service.
Java AWS CloudFormation CloudWatch EC2 VPC Route53 SNS & SQS AWS? NLB & ALB Linux other AWS internal tooling
Amazon
2 months
2024-01 - 2024-02

Postal code screening & benchmarking

Senior Java Engineer Java AWS AppConfig ...
Senior Java Engineer

The client?s (an Amazon internal regulator?s) screening engine had difficulties identifying (matching) postal codes within noisy input, making the end-to-end process omit transactions containing addresses of potential perpetrators.

  • Improved postal code identification accuracy by 95% by making use of better noise elimination techniques and enhanced regular expression patterns.
  • Increased identification of previously known problematic inputs by 90% by eliminating all the known false negatives, without altering the baseline number of previously matched results. This was made possible by thorough analysis & benchmarking.
  • Captured additional 1000s of input addresses by automating the noise removal and proper-identification of UK postal codes, thus mitigating all the known, as well as some unknown risks. This further helped the organization achieve its quarterly targets.
Java AWS AppConfig EC2 Linux other AWS internal tooling
Amazon
1 year
2023-01 - 2023-12

Automatic monitoring of platforms deployments

Senior Java Engineer Java AWS CloudWatch ...
Senior Java Engineer

The client, an Amazon-internal team, lacked insights into its timely deployment of denied parties lists. This misalignment made it difficult to track which list revisions were deployed and used in screening, how long the entire process took and maintaining legal compliance.

  • Prevented Amazon from costly fines more than 5 times by automating the monitoring of deployment times, identifying delays, alerting on potential issues promptly and signaling for rollback.
  • Enhanced operational efficiency by 50% by creating a live dashboard, thus reducing manual intervention and providing detailed insights into the deployment process.
Java AWS CloudWatch SimpleWorkflow StepFunctions S3 Lambda EventBridge IAM Linux other AWS internal tooling TypeScript
Amazon
1 year 8 months
2021-05 - 2022-12

Big Data imagery import pipeline

Python Engineer Python Docker Kubernetes ...
Python Engineer

The client, an Asian-market leading automotive stakeholder, wished to surpass its competitors in terms of up-to-date navigation systems. They were facing issues with timely gathering street-level imagery updates from various sources and training & updating ML models for infotainment system maps.

  • Enabled fetching 10s of TeraBytes of data daily by implementing an automatic, large-scale imagery import pipeline.
  • Further decreased latency by 20% by investigating and fixing queue consumption performance issues, as well as migrating to the new major version API of the provider service.
  • Enabled better business insights by integrating the platform with a monitoring stack from scratch.
Python Docker Kubernetes RabbitMQ gRPC DC/OS (Mesos) Jenkins Linux ElasticSearch Kibana Logstash JupyterLab
Telenav

Aus- und Weiterbildung

Aus- und Weiterbildung

2019 - 2022:

Computer Science

BA

Babe? Bolyai University of Cluj Napoca, Cluj-Napoca

Kompetenzen

Kompetenzen

Top-Skills

Java Python AWS JSON-RPC TypeScript Microservices Cloud

Produkte / Standards / Erfahrungen / Methoden

Java
2 years
AWS
2 years
Python
2 years
TypeScript
1 year
Docker
2 years
Kubernetes
2 years
RabbitMQ
2 years
Jenkins
2 years
DC/OS (Mesos)
2 years
ELK Stack
2 years
JupyterLab
2 years
gRPC
2 years
Git
3 years
Linux
3 years

ABOUT ME

  • I am a Senior Java Engineer / contractor / freelancer with 3+ years of experience
  • I've worked in various industries, including: automotive, SEO and Denied Party Screening. My focus is on technical development complemented by exceptional communication skills. I use my expertise, skills, and passion to design and implement top-of-the-line software solutions for companies worldwide.
  • Drop me a message if you think my expertise could help your organization!

Vertrauen Sie auf Randstad

Im Bereich Freelancing
Im Bereich Arbeitnehmerüberlassung / Personalvermittlung

Fragen?

Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

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