Hi! I'm
Sebastián
Alejo
Iglesias
a Software Engineer
I'm Sebastián Alejo Iglesias, a software engineer and teacher based in Argentina, who speaks English and Spanish. I've been working in the tech industry for over 9 years, and I've had the opportunity to work for both big tech companies and startups. I'm a full stack engineer, and I'm proficient in a variety of languages and technologies, including Java, Scala, Typescript, and React. I'm passionate about building innovative and user-friendly software. I'm also a lifelong learner, and I'm always eager to learn new things. In my free time, I enjoy testing machine learning tools, 3D printing, ham radio, hydroponics, soccer, gaming, and traveling. My goal is to be happy with myself and with my work. I hope to one day start my own company, but I'm unsure as to what that company will do. For now, I'm focused on learning and growing as a software engineer.
Work Experience
Senior Software Engineer
- Now
Maintained and enhanced existing services written in Python (Django, FastAPI), Scala (Tapir, http4s, Cats), Java (Spring), TypeScript (Node.js), and PHP (CodeIgniter), scaling systems to support a growing client base by adding monitoring and open tracing using AWS/CloudWatch and Terraform. Developed internal tools for the Finance team, improving processes such as reconciliations, onboarding, checks, trade tickets, and receipts. Implemented a cryptocurrency trading platform (buy/sell) integrated with Allaria+ core systems. Improved and extended shared engineering libraries and contributed to web and mobile UI development using React Native.
Head Teaching Assistant (Jefe de Trabajos Prácticos)
- Now
Teaching software engineering students and coordinating academic practical coursework. Promoted to Head Teaching Assistant (Jefe de Trabajos Prácticos) in March 2025. Introduction to Programming 1 (1st-year students): Basic Python and programming principles, use of a standard POSIX terminal, git, and GitHub. Laboratory I & II (3rd-year students): Mentoring students through full software engineering project lifecycles from conception to implementation and testing using use case analysis, architecture, and agile sprints.
Founding Software Engineer
-
At Autonoma AI, I designed and implemented new AI-powered testing features that significantly improved customer outcomes. I leveraged GCP, Kubernetes, and microservices to build scalable infrastructure, using TypeScript for backend services and integrating OpenAI to enhance test generation and validation.
Software Engineer (Sr)
-
Designed, documented, led and developed numerous features spanning CI/CD pipelines, cloud services in GCP, front and backend tasks using React, Node.js, Typescript and Express (emphasizing a functional programming approach). Established and implemented various types of tests using Playwright to ensure product robustness. Worked closely with founders and clients to better understand their needs, to later define, lead a software development team and implement with them key product features, driving significant growth in our customer user base.
Senior Software Engineer (Sr)
-
MuleSoft, a Salesforce company.
Worked on Mulesoft RPA development adapting a legacy codebase to the way of coding in MuleSoft. Worked with Java + Spring microservices that interacted with Postgresql Databases whose migrations where managed by Liquibase. Performed performance and functionality tests as well.
Software Engineer (Ssr)
-
MuleSoft, a Salesforce company.
Worked on Anypoint's Datagraph in an engineering team following agile methodologies, developing front and back- end services. The product was developed from scratch and maintained in production later on. In conjunction with my team, we developed REST Services using Java and Spring as well as web clients with React, Redux and Typescript. Developed integration tests using Testcafe. Helped and provided guide for junior and intern employees.
Associate Software Engineer (Jr)
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Worked on the Monitoring Platform inside MuleSoft's Anypoint Platform in an engineering team following agile methodologies, developing front and backend services. The product was developed from scratch and maintained in production later on. In conjunction with my team, we developed REST Services using Scala, Akka and Java and several types of databases as well as web clients with React, Angular and Typescript. Which where deployed in the AWS cloud via tools such as Terraform, Salt, Spinnaker and Jenkins. For Monitoring purposes, I've worked with the Elasticsearch stack and set up scripts on Python and bash.
Software Engineer Intern
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Maintained a legacy VCS system and developed new features using Raml, Java, Junit, Spring Framework, Docker and Kubernetes.
Founder Informatica Solidaria
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Founded Informatica Solidaria, an organization that received old electronics, repaired and donated them to educational organizations in Pilar, Buenos Aires, Argentina.
IT Teacher
-
Worked as a teacher in IT for an accelerated high school course for adults under the FINES plan. I planned and gave night classes to both adults and teenagers.
Volunteer
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Entrepreneur 4 Entrepreneur
Volunteer in consulting and IT area. Studied and applied LEAN startup methodologies to assist other entrepreneurs and performed web development for the consulting firm.
IT Manager
-
I-Gen Latam
Computer repairing, MySQL database management, PHP and web development, and maintained a legacy report generation system.
Education
Hobby Projects
MatchBuddy
Organize matches, manage players, and generate balanced teams with ease. A comprehensive sports management platform designed to streamline team organization and player coordination.
Juntadita
Split expenses easily with Juntadita, the perfect app for managing shared costs. Simplify group finances with an intuitive interface designed for seamless expense tracking and settlement.
Sushi Piece Counter
A minimalist sushi piece counting tool for tracking your sushi consumption. Clean, simple, and effective - perfect for sushi lovers who want to keep track of their dining experience.
Empanadin
A simple empanada/dumpling organizer for tracking what to order with friends.
Solitario
A classic solitaire card game brought to the web. Enjoy the timeless card game with a clean and intuitive interface.
Exam Clock
Free online exam clock with a live countdown timer, animated progress bar, and automatic overtime tracking. Set start and end times to monitor exam progress in real time.
Callsign Lookup
Paste a ham radio callsign or prefix and instantly get the country, DXCC zones and the beam heading from your QTH. Built to scratch my own ham radio itch.
Color Change G-code
Upload your sliced G-code, preview it in 3D, pick where to change filament color, and download the G-code with M600 color changes inserted. Built for my 3D-printing hobby.
Fútbol Hoy Argentina
Live Argentine soccer fixtures, match kickoff times, and TV channels (Pack Fútbol, ESPN, TyC Sports, Disney+). Automated programmatic updates 3 times a day.
Telekino Resultados
Real-time winning numbers and prize draws for Argentine lottery Telekino & Rekino with automated daily scraping and historical archives.
Feriados Argentina
Live countdown to the next Argentine national holiday with long-weekend (3 & 4-day) alerts, bridge holiday tags, and official calendar. Daily automated sync.
Billeteras & Dólar Hoy
Compare yields and annual percentage rates (TNA) of Argentine virtual wallets (Mercado Pago, Naranja X, Personal Pay, Ualá) and live exchange rates (Blue, MEP, Card).
Inflation Calculator
Calculate cumulative inflation in Argentina, purchasing power loss, and historical peso value adjustments with official INDEC Consumer Price Index (CPI) data.
Franco Colapinto F1
Formula 1 timetable in Argentine Time (ART GMT-3) for Argentine driver Franco Colapinto (#43): next Grand Prix countdown, practice/qualy sessions, and broadcast guide.
Salary & SAC Calculator
Calculate take-home pay in Argentina from gross salary: statutory deductions (pension 11%, healthcare 3%, PAMI 3%), semi-annual bonus (SAC aguinaldo), and overtime.
Monotributo Scales
Interactive category simulator and official ARCA (ex-AFIP) Monotributo tax brackets for Argentina: annual billing limits, monthly tax fees, and recategorization dates.
Rental Calculator (ICL & IPC)
Calculate statutory and deregulated rental price adjustments in Argentina using official BCRA ICL indices or INDEC IPC inflation. Instant breakdown and WhatsApp summary.
Domestic Worker Salary Calculator
Calculate domestic staff salaries, hourly wages, and monthly pay in Argentina. Official CNTCP / ARCA scales, seniority bonuses, and zone supplements.
Aguinaldo (SAC) Salary Calculator
Calculate statutory annual bonus (SAC) in Argentina. Net take-home pay, pension & health withholdings (17%), proportional months, and legal deadlines.
Road Trip Fuel & Toll Calculator
Calculate fuel consumption, toll fees, and road trip budgets across Argentina. Official fuel prices from Secretaría de Energía & YPF, plus per-passenger cost splitting.
Severance & Settlement Calculator
Calculate severance pay for no-cause dismissal and final settlements in Argentina under statutory labor law (Art. 245 LCT, lack of notice, accrued vacation & bonus).
UVA Mortgage Simulator
Simulate Argentine UVA home loans with real-time daily BCRA index values. Calculate initial monthly installments, minimum qualifying family income (25% RCI), and compare leading bank interest rates.
Retirement & Pension Calculator
Estimate statutory retirement age, required 30-year pension contributions, and 2-for-1 excess age compensation under Argentine social security law (ANSES Ley 24.241 & PUAM).
Installments vs. Cash Calculator
Determine whether to pay upfront in cash or finance in installments across Argentina. Compare merchant interest surcharges against short-term yields (money market funds or fixed deposits) via Net Present Value (NPV).
Vehicle Transfer Fee Calculator
Calculate the comprehensive cost of transferring cars and motorcycles in Argentina. Official 1% DNRPA national registry tariffs, 20% online Form 08 discounts, and provincial stamp duty (CABA, PBA, Córdoba, Santa Fe).
Fixed-Term Deposit Tracker (BCRA)
Real-time fixed-term deposit rates (TNA & TEA) across 32 Argentine banks from the central bank (BCRA). 30-day interest earnings simulator and non-client online deposit filters.
Electricity Bill Calculator (Edenor/Edesur)
Simulate residential monthly electricity bills in Buenos Aires under ENRE tariff schedules. R1 to R9 tier categorization, RASE subsidy segmentation (N1, N2, N3), and 350 kWh subsidy cap enforcement.
Child Support Calculator (INDEC)
Estimate child support obligations in Argentina based on INDEC's official Childrearing Basket (Canasta de Crianza) and proportional income splits (Civil Code Arts. 658 & 660).
Overtime Pay Calculator (Argentina)
Compute 50% and 100% overtime pay, night shift bonuses (13.33%), statutory 17% payroll deductions, and Decree 484/2000 30-hour monthly caps under Labor Contract Law 20.744.
Income Tax Calculator (4th Category)
Estimate monthly withholding under Argentina's Personal Income Tax (Impuesto a las Ganancias) for salaried employees. Updated Art. 94 progressive scales and ARCA personal deductions.
Vacation & Bonus Pay Calculator
Calculate statutory vacation entitlements by seniority (14, 21, 28, 35 days) and the 25-day divisor vacation bonus under Argentine Labor Law 20.744. Net payout and monthly salary simulation.
Judicial Interest Calculator
Calculate judicial moratorium interest using BNA Active Lending Rate (Civil/Commercial), BAPRO Passive Digital Rate (SCBA), and Labor Court CNAT Resolution 2783 (INDEC CPI + 3% post-Oliva ruling).
Natural Gas Bill Simulator (MetroGAS/Naturgy)
Simulate monthly residential gas bills by appliances (heaters, water heaters, stoves) or direct m³ consumption. ENARGAS official tariff schedules and RASE N1/N2/N3 subsidies.
Construction Materials Calculator
Estimate construction and renovation materials: interior latex paint (liters), hollow clay bricks and mortar, ceramic tile boxes with cut waste, and concrete for subfloors.
Shoe & Clothing Size Converter
Interactive international sizing conversion for Argentina: shoes and sneakers (AR vs US, UK, EUR, CM foot length) and size charts for shirts and jeans for online shopping.
VTV & Vehicle Inspection (Argentina)
Determine vehicle inspection (VTV) due dates by license plate ending digit for Buenos Aires City and Province. Official tariffs, exemption rules for new cars, and technical pass checklist.
AC Cooling Load & Frigorías Calculator
Calculate the exact thermal cooling power in Frigorías, BTU/h and Watts for residential air conditioning with interactive real-time 3D room simulation.
Argentine CUIL & CUIT Generator & Validator
Generate and validate Argentine Tax & Labor ID numbers (ARCA/ANSES) using the official Modulo 11 check algorithm with an interactive 3D digital ID card.
Traffic Fines & Fixed Unit (UF) Calculator
Calculate traffic infraction fines in Argentine Pesos using official fuel-indexed Fixed Units (UF) for Buenos Aires City and Province with voluntary payment discount.
Swimming Pool Volume & Chlorine Calculator
Calculate water volume in liters and exact dosages for liquid chlorine, shock treatments, algaecides and clarifiers with interactive 3D water status simulation.
3D Printing Cost Calculator & Client Quoter
Calculate exact production costs in filament (PLA, PETG, Resin), electricity and machine depreciation with an interactive 3D print bed and WhatsApp quote exporter.
Pregnancy Gestational Weeks & Due Date Calculator
Calculate gestational weeks and days using Naegele's obstetric rule, estimated delivery date (EDD) and comparative baby size week by week.
Pet Biological Age & Daily Food Ration Calculator
Convert dog and cat biological age to human equivalent years based on veterinary breed size curves, and compute daily food kibble rations with an interactive bowl.
Card Scoreboard & Truco
Digital matchstick scoreboard (fósforos) for Truco (to 30, buenas/malas), Continental, Tute, Chinchón, 10.000, and free-form score tracking. Zero-install PWA.
Asadín — Asado Calculator
Calculate exact meat, sausages, offal (achuras), charcoal bags, and drink quantities for Argentine barbecues based on guest count and appetite presets.
Picada Calculator
Calculate how many cold cuts, cured meats, cheeses, and snacks to buy for charcuterie boards per person. Generates interactive grocery lists ready for WhatsApp.
Pizzadita — Pizza Calculator
Determine how many whole pizzas and slices to order or bake for group gatherings and events, with balanced flavor recommendations and crowd size scaling.
AYCE Counter
Plate and round tracker for All-You-Can-Eat, Korean BBQ, and Hot Pot buffets. Track seating countdown timers, average consumption per person, and meal costs.
Spool Scale — 3D Printing
Calculate remaining 3D printing filament on opened spools by subtracting empty spool tare weights with built-in presets (Bambu Lab, Prusa, Sunlu, eSun).
Coin Flip Online
Interactive 3D coin toss tool for settling bets, deciding turns, and random choices. Features realistic flip animations and cumulative heads/tails statistics.
Want to work together?
Email me