Tomasz Jaśkiewicz

Tomasz Jaśkiewicz

Senior/Staff Backend Engineer

About

Staff Backend Engineer with 11+ years of experience specializing in Ruby/Rails and cloud technologies (AWS, GCP). Proven track record designing and implementing scalable solutions across fintech (cards, payments), e-mobility, and event platforms. Technically proficient with a passion for DevOps, AI, and self-hosting applications. Strong advocate for team collaboration and fostering professional relationships, with a keen interest in psychology, coaching, and self-development. Passionate about work that has a genuine positive impact on people. Seeking roles that leverage my Ruby expertise while offering opportunities to learn and work with Golang, TypeScript, and Python.

Skills

Backend Development
Ruby / Rails / Grape / Sidekiq REST APIs / GraphQL PostgreSQL / MySQL / DynamoDB Redis / RabbitMQ
AI & Automation
LLM APIs (Claude, OpenAI) Prompt Engineering AI-assisted Development (Claude Code, Copilot)
DevOps & Cloud
AWS (ECS, Lambda, S3, RDS, SQS) Docker / Kubernetes Terraform / Infrastructure as Code CI/CD Pipelines
Leadership
Technical Leadership System Design Code Review Mentoring Coaching

Experience

Senior Software Engineer

1 yr 6 mo · Sep 2024 — Present

Housecall Pro

Home services software platform serving thousands of businesses.

  • Built Commissions feature across 4 domains, requiring cross-team collaboration and deep technical research
  • Developed internal and external APIs for cross-domain communication and payment provider integrations
  • Implemented Datadog monitoring for system observability

Senior Software Engineer

5 mo · Apr 2024 — Aug 2024

Distribusion Technologies

Global ground transportation booking platform.

  • Contributed to the world's largest B2B ground transportation booking API serving 70+ countries
  • Backend API development in service-oriented architecture for rail, bus, and airport transfers
  • Integrated with major partners including Google, Booking.com, and national rail carriers

Staff Engineer

1 yr 5 mo · Oct 2022 — Feb 2024

ABB E-mobility

Cloud-based applications for EV charging infrastructure (PANION).

  • Designed vehicle tracking logic for charging sessions, State of Charge, and GPS locations
  • Processed extensive telematics events for vehicle movements and location data
  • Built scalable fleet management platform using AWS (Fargate, S3, RDS, CDK)

Senior Backend Engineer

9 mo · Jan 2022 — Sep 2022

Hopin

Online event platform (StreamYard, Streamable, Superwave).

  • Designed and developed Hopin Registration for seamless website integration
  • Created efficient processes for orders, payments, and refunds with fee sharing feature
  • Developed Custom Forms feature for event organizers and participants

Senior Backend Engineer

4 yr 3 mo · Oct 2017 — Dec 2021

solarisBank AG

Banking-as-a-Service platform, Cards team.

  • Built card issuance and transaction processing with 3rd party provider integrations
  • Developed Smart Agent for digital fraud alerts and 3D Secure for online transactions
  • Implemented card tokenization for Apple, Google, and Samsung Pay
  • Ensured PCI DSS compliance for Cardholder Data
  • Migrated to AWS (Fargate, S3, Lambda, RDS, DynamoDB) with Terraform

Senior Ruby Developer & Team Lead

5 yr 2 mo · Dec 2014 — Jan 2020

Netguru

Software consultancy - multiple client projects.

  • Led development teams on recruitment and career platforms
  • Built LinkedIn-like platform with Segment.io, Searchkick, and Elasticsearch
  • Developed African Market Talent Platform with secure messaging system
  • Mentored junior developers and conducted Rails workshops

Education

Postgraduate studies in Coaching with Psychology Elements

SWPS University

2024 — 2026

Engineer's degree in Computer Science

AGH University of Science and Technology

2010 — 2014

Postgraduate studies in Managerial Studies

Tischner European University

2014 — 2015

Certificates

AWS Certified Cloud Practitioner

Amazon Web Services

Mar 2020

Docker Fundamentals

A Cloud Guru

Oct 2019

The Modern JavaScript Bootcamp

Udemy

Volunteer

Men's Circle Facilitator

Fundacja Masculinum

Facilitating personal growth circles for men in Cracow.

9 mo · Jun 2025 — Present

Languages

Polish — Native
English — Professional working
Italian — Elementary